wip

VMCB 014h ~ 068h
AMD VMCB 000h ~ 014h
2025-08-28 19:22:30 +09:00 · 2025-08-28 16:29:47 +09:00 · 2025-08-28 15:53:30 +09:00 · 2025-08-28 13:57:21 +09:00 · 2025-08-26 14:55:38 +00:00 · 2025-08-25 12:02:53 +00:00
42 changed files with 2154 additions and 172 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -2,5 +2,7 @@ nel_os_bootloader/target
 nel_os_kernel/target
 nel_os_common/target
 nel_os_bootloader/fat.img
+nel_os_bootloader/myOSimage.img
 nel_os_bootloader/iso/
 nel_os_bootloader/nel_os.iso
+nel_os_bootloader/vmlinux
--- a/README.md
+++ b/README.md
@@ -0,0 +1 @@
+![check](https://git.mii.dev/mii/nel_os_uefi/actions/workflows/check.yaml/badge.svg?branch=main)
--- a/nel_os_bootloader/OVMF-pure-efi.fd
+++ b/nel_os_bootloader/OVMF-pure-efi.fd
--- a/nel_os_bootloader/OVMF.fd
+++ b/nel_os_bootloader/OVMF.fd
--- a/nel_os_bootloader/bochs.out
+++ b/nel_os_bootloader/bochs.out
@@ -0,0 +1,408 @@
+00000000000i[      ] Bochs x86 Emulator 3.0.devel
+00000000000i[      ]   Built from GitHub snapshot after release 3.0
+00000000000i[      ]   Compiled on Aug 21 2025 at 19:02:35
+00000000000i[      ] System configuration
+00000000000i[      ]   processors: 1 (cores=1, HT threads=1)
+00000000000i[      ]   A20 line support: yes
+00000000000i[      ] IPS is set to 4000000
+00000000000i[      ] CPU configuration
+00000000000i[      ]   SMP support: no
+00000000000i[      ]   Using pre-defined CPU configuration: corei7_sandy_bridge_2600k
+00000000000i[      ] Optimization configuration
+00000000000i[      ]   RepeatSpeedups support: no
+00000000000i[      ]   Fast function calls: no
+00000000000i[      ]   Handlers Chaining speedups: no
+00000000000i[      ] Devices configuration
+00000000000i[      ]   PCI support: i440FX i430FX i440BX
+00000000000i[      ]   Networking: no
+00000000000i[      ]   Sound support: no
+00000000000i[      ]   USB support: no
+00000000000i[      ]   VGA extension support: vbe
+00000000000i[IMG   ] Disk image modules
+00000000000i[IMG   ]   flat concat sparse dll growing undoable volatile vmware3
+00000000000i[IMG   ]   vmware4 vbox vpc vvfat
+00000000000i[MEM0  ] allocated memory at 0x7d9025bdd010. after alignment, vector=0x7d9025bde000, block_size = 128K
+00000000000i[MEM0  ] 256.00MB
+00000000000i[MEM0  ] mem block size = 0x00020000, blocks=2048
+00000000000i[MEM0  ] rom at 0xffe00000/2097152 ('./OVMF-pure-efi.fd')
+00000000000i[CPU0  ] initialized CPU model corei7_sandy_bridge_2600k
+00000000000i[DEV   ] will paste characters every 100 iodev timer ticks
+00000000000i[PLUGIN] init_dev of 'pci' plugin device by virtual method
+00000000000i[DEV   ] i440FX PMC present at device 0, function 0
+00000000000i[PLUGIN] init_dev of 'pci2isa' plugin device by virtual method
+00000000000i[DEV   ] PIIX3 PCI-to-ISA bridge present at device 1, function 0
+00000000000i[PLUGIN] init_dev of 'cmos' plugin device by virtual method
+00000000000i[CMOS  ] Using local time for initial clock
+00000000000i[CMOS  ] Setting initial clock to: Fri Aug 22 15:03:30   2025 tz=utc (time0=1755875010)
+00000000000i[PLUGIN] init_dev of 'dma' plugin device by virtual method
+00000000000i[DMA   ] channel 4 used by cascade
+00000000000i[PLUGIN] init_dev of 'pic' plugin device by virtual method
+00000000000i[PLUGIN] init_dev of 'pit' plugin device by virtual method
+00000000000i[PLUGIN] init_dev of 'vga' plugin device by virtual method
+00000000000i[MEM0  ] Register memory access handlers: 0x0000000a0000 - 0x0000000bffff
+00000000000i[VGA   ] interval=100000, mode=realtime
+00000000000i[VGA   ] Setting VGA update interval to 100000 (10.0 Hz)
+00000000000i[VGA   ] VSYNC using standard mode
+00000000000i[BXVGA ] VBE Bochs Display Extension Enabled (16 MB)
+00000000000i[DEV   ] PCI slot #1 used by plugin 'pcivga'
+00000000000i[DEV   ] Experimental PCI VGA present at device 2, function 0
+00000000000i[BXVGA ] loaded PCI ROM '/usr/local/share/bochs/VGABIOS-lgpl-latest-cirrus.bin' (size=33792 / PCI=64k)
+00000000000i[PLUGIN] init_dev of 'floppy' plugin device by virtual method
+00000000000i[DMA   ] channel 2 used by Floppy Drive
+00000000000i[FLOPPY] Using boot sequence disk, none, none
+00000000000i[FLOPPY] Floppy boot signature check is enabled
+00000000000i[PLUGIN] init_dev of 'acpi' plugin device by virtual method
+00000000000i[DEV   ] ACPI Controller present at device 1, function 3
+00000000000i[PLUGIN] init_dev of 'hpet' plugin device by virtual method
+00000000000i[HPET  ] initializing HPET
+00000000000i[MEM0  ] Register memory access handlers: 0x0000fed00000 - 0x0000fed003ff
+00000000000i[PLUGIN] init_dev of 'ioapic' plugin device by virtual method
+00000000000i[IOAPIC] initializing I/O APIC
+00000000000i[MEM0  ] Register memory access handlers: 0x0000fec00000 - 0x0000fec00fff
+00000000000i[IOAPIC] IOAPIC enabled (base address = 0xfec00000)
+00000000000i[PLUGIN] init_dev of 'keyboard' plugin device by virtual method
+00000000000i[PLUGIN] init_dev of 'pci_ide' plugin device by virtual method
+00000000000i[DEV   ] PIIX3 PCI IDE controller present at device 1, function 1
+00000000000i[PLUGIN] init_dev of 'harddrv' plugin device by virtual method
+00000000000i[HD    ] HD on ata0-0: './myOSimage.img', 'flat' mode
+00000000000i[IMG   ] hd_size: 67108864
+00000000000i[HD    ] ata0-0: autodetect geometry: CHS=130/16/63 (sector size=512)
+00000000000i[HD    ] ata0-0: extra data outside of CHS address range
+00000000000i[HD    ] translation on ata0-0 set to 'none'
+00000000000i[PLUGIN] init_dev of 'unmapped' plugin device by virtual method
+00000000000i[PLUGIN] init_dev of 'biosdev' plugin device by virtual method
+00000000000i[PLUGIN] init_dev of 'speaker' plugin device by virtual method
+00000000000e[PCSPK ] Failed to open /dev/console: 許可がありません
+00000000000e[PCSPK ] Deactivating beep on console
+00000000000i[PLUGIN] init_dev of 'extfpuirq' plugin device by virtual method
+00000000000i[PLUGIN] init_dev of 'parallel' plugin device by virtual method
+00000000000i[PAR   ] parallel port 1 at 0x0378 irq 7
+00000000000i[PLUGIN] init_dev of 'serial' plugin device by virtual method
+00000000000i[SER   ] com1 at 0x03f8 irq 4 (mode: null)
+00000000000i[PLUGIN] init_dev of 'iodebug' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'pci' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'pci2isa' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'cmos' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'dma' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'pic' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'pit' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'vga' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'floppy' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'unmapped' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'biosdev' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'speaker' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'extfpuirq' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'parallel' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'serial' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'iodebug' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'acpi' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'hpet' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'ioapic' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'keyboard' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'pci_ide' plugin device by virtual method
+00000000000i[PLUGIN] register state of 'harddrv' plugin device by virtual method
+00000000000i[SYS   ] bx_pc_system_c::Reset(HARDWARE) called
+00000000000i[CPU0  ] cpu hardware reset
+00000000000i[APIC0 ] allocate APIC id=0 (MMIO enabled) to 0x0000fee00000
+00000000000i[CPU0  ] CPUID[0x00000000]: 0000000d 756e6547 6c65746e 49656e69
+00000000000i[CPU0  ] CPUID[0x00000001]: 000206a7 00010800 079ae3bf afebfbff
+00000000000i[CPU0  ] CPUID[0x00000002]: 76035a01 00f0b0ff 00000000 00ca0000
+00000000000i[CPU0  ] CPUID[0x00000003]: 00000000 00000000 00000000 00000000
+00000000000i[CPU0  ] CPUID[0x00000004]: 1c004121 01c0003f 0000003f 00000000
+00000000000i[CPU0  ] CPUID[0x00000005]: 00000040 00000040 00000003 00001120
+00000000000i[CPU0  ] CPUID[0x00000006]: 00000077 00000002 0000000b 00000000
+00000000000i[CPU0  ] CPUID[0x00000007]: 00000000 00000000 00000000 00000000
+00000000000i[CPU0  ] CPUID[0x00000008]: 00000000 00000000 00000000 00000000
+00000000000i[CPU0  ] CPUID[0x00000009]: 00000000 00000000 00000000 00000000
+00000000000i[CPU0  ] WARNING: Architectural Performance Monitoring is not implemented
+00000000000i[CPU0  ] CPUID[0x0000000a]: 07300803 00000000 00000000 00000603
+00000000000i[CPU0  ] CPUID[0x0000000b]: 00000000 00000000 00000000 00000000
+00000000000i[CPU0  ] CPUID[0x0000000c]: 00000000 00000000 00000000 00000000
+00000000000i[CPU0  ] CPUID[0x0000000d]: 00000003 00000240 00000240 00000000
+00000000000i[CPU0  ] CPUID[0x80000000]: 80000008 00000000 00000000 00000000
+00000000000i[CPU0  ] CPUID[0x80000001]: 00000000 00000000 00000001 28100000
+00000000000i[CPU0  ] CPUID[0x80000002]: 20202020 49202020 6c65746e 20295228
+00000000000i[CPU0  ] CPUID[0x80000003]: 65726f43 294d5428 2d376920 30303632
+00000000000i[CPU0  ] CPUID[0x80000004]: 5043204b 20402055 30342e33 007a4847
+00000000000i[CPU0  ] CPUID[0x80000005]: 00000000 00000000 00000000 00000000
+00000000000i[CPU0  ] CPUID[0x80000006]: 00000000 00000000 01006040 00000000
+00000000000i[CPU0  ] CPUID[0x80000007]: 00000000 00000000 00000000 00000100
+00000000000i[CPU0  ] CPUID[0x80000008]: 00003028 00000200 00000000 00000000
+00000000000i[CPU0  ] CPU Features supported:
+00000000000i[CPU0  ] 		x87
+00000000000i[CPU0  ] 		486ni
+00000000000i[CPU0  ] 		pentium_ni
+00000000000i[CPU0  ] 		p6ni
+00000000000i[CPU0  ] 		mmx
+00000000000i[CPU0  ] 		debugext
+00000000000i[CPU0  ] 		vme
+00000000000i[CPU0  ] 		pse
+00000000000i[CPU0  ] 		pae
+00000000000i[CPU0  ] 		pge
+00000000000i[CPU0  ] 		mtrr
+00000000000i[CPU0  ] 		pat
+00000000000i[CPU0  ] 		sysenter_sysexit
+00000000000i[CPU0  ] 		clflush
+00000000000i[CPU0  ] 		sse
+00000000000i[CPU0  ] 		sse2
+00000000000i[CPU0  ] 		sse3
+00000000000i[CPU0  ] 		ssse3
+00000000000i[CPU0  ] 		sse4_1
+00000000000i[CPU0  ] 		sse4_2
+00000000000i[CPU0  ] 		popcnt
+00000000000i[CPU0  ] 		mwait
+00000000000i[CPU0  ] 		longmode
+00000000000i[CPU0  ] 		lm_lahf_sahf
+00000000000i[CPU0  ] 		nx
+00000000000i[CPU0  ] 		cmpxhg16b
+00000000000i[CPU0  ] 		rdtscp
+00000000000i[CPU0  ] 		xsave
+00000000000i[CPU0  ] 		xsaveopt
+00000000000i[CPU0  ] 		aes_pclmulqdq
+00000000000i[CPU0  ] 		vmx
+00000000000i[CPU0  ] 		xapic
+00000000000i[CPU0  ] 		pcid
+00000000000i[CPU0  ] 		tsc_deadline
+00000000000i[PLUGIN] reset of 'pci' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'pci2isa' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'cmos' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'dma' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'pic' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'pit' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'vga' plugin device by virtual method
+00000000000i[DDC   ] Using default EDID for resolution 1920x1200
+00000000000i[PLUGIN] reset of 'floppy' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'acpi' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'hpet' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'ioapic' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'keyboard' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'pci_ide' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'harddrv' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'unmapped' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'biosdev' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'speaker' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'extfpuirq' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'parallel' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'serial' plugin device by virtual method
+00000000000i[PLUGIN] reset of 'iodebug' plugin device by virtual method
+00000055493i[ACPI  ] new PM base address: 0xb000
+00000055938i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00000056097i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00000056270i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00000056429i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00000056598i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00000056757i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00000056929i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00000057088i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00000057261i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00000057420i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00000057589i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00000057748i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00000057919i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00000058078i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404699010i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404699261i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404699420i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404699586i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404699747i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404699909e[CPU0  ] RDMSR: Unknown register 0x17
+00404701729i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404701888i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404702065i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404702224i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404702404i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404702563i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404702739i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404702898i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404703078i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404703237i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404703414i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404703573i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404706952i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404707111i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404707287i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404707446i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404707627i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404707786i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404707962i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404708121i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404708293i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404708452i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404708665i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404708836i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404749196i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404749367i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404750562i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404750733i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404953225i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404955765i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404956646i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404957662i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404957821i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404957987i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404958148i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404959043i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404959921i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404960937i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404961096i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404961262i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404961423i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00404962673i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455692544i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455721201i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455721452i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455721612i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455721802i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455721963i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455722125e[CPU0  ] RDMSR: Unknown register 0x17
+00455727961i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455728121i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455728322i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455728482i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455728686i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455728846i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455729046i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455729206i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455729410i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455729570i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455729771i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455729931i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455731779i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455731939i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455732129i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455732290i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455733787i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455733947i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455734137i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00455734298i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461046195i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461046350i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461046524i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461046679i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461047124i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461047279i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461047448i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461047603i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461047777i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461047932i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461047952i[APIC0 ] set timer divide factor to 1
+00461048098i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461048253i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461048427i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461048582i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461048753i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461048908i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461049074i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461049229i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461049402i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00461049557i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00471049475i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00471049630i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00477485335e[CMOS  ] write to control register 0x0d ignored (read-only)
+00481049475i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00481049630i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00491049475i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00491049630i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00501049476i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00501049631i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00511049475i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00511049630i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00521049475i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00521049630i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00531049476i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00531049631i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00541049476i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00541049631i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00550634745i[PIDE  ] BAR #4: i/o base address = 0xc000
+00550635289i[MEM0  ] Register memory access handlers: 0x000080000000 - 0x000080ffffff
+00550635289i[BXVGA ] BAR #0: mem base address = 0x80000000
+00550637278i[MEM0  ] Register memory access handlers: 0x000081000000 - 0x00008100ffff
+00550637278i[BXVGA ] new ROM address = 0x81000000
+00551049475i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00551049630i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00556732034i[SER   ] com1: FIFO enabled
+00558548658i[SER   ] com1: FIFO enabled
+00561049475i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00561049630i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00562088041i[KBD   ] Switched to scancode set 2
+00571052468i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00571052623i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00581052467i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00581052622i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00581767851i[P2ISA ] PCI IRQ routing: PIRQA# set to 0x0a
+00581767938i[P2ISA ] PCI IRQ routing: PIRQB# set to 0x0a
+00581768025i[P2ISA ] PCI IRQ routing: PIRQC# set to 0x0b
+00581768112i[P2ISA ] PCI IRQ routing: PIRQD# set to 0x0b
+00591052467i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00591052622i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00601052467i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00601052622i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00611053746i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00611053901i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00621053540i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00621053695i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00631052467i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00631052622i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00641052467i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00641052622i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00651052467i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00651052622i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00661053540i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00661053695i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00671052467i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00671052622i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00681052467i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00681052622i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00691053746i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00691053901i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00701053540i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00701053695i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00711053746i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00711053901i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00721052468i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00721052623i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00731052468i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00731052623i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00741058328i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00741058483i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00751053746i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00751053901i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00761053540i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00761053695i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00764170096i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00764170251i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00764170425i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+00764170580i[CPU0  ] RDMSR: Read 00000000:fee00900 from MSR_APICBASE
+02367208064p[IOAPIC] >>PANIC<< I/O APIC read at address 0x0000fec00008 spans 32-bit boundary !
+02367208064i[CPU0  ] CPU is in long mode (active)
+02367208064i[CPU0  ] CS.mode = 64 bit
+02367208064i[CPU0  ] SS.mode = 64 bit
+02367208064i[CPU0  ] EFER = 0x00000d00: ffxsr NXE LMA LME sce
+02367208064i[CPU0  ] XCR0=0x00000001: tiledata tilecfg hwp lbr uintr hdc cet_s cet_u pasid pkru pt hi_zmm zmm_hi256 opmask bndcfg bndregs ymm sse FPU
+02367208064i[CPU0  ] | RAX=0000000000000000  RBX=0000000000232188
+02367208064i[CPU0  ] | RCX=ffffffffffffffff  RDX=00000000fec00000
+02367208064i[CPU0  ] | RSP=0000000000232060  RBP=000000000fd7e518
+02367208064i[CPU0  ] | RSI=ffffffffffffffff  RDI=0000000000232188
+02367208064i[CPU0  ] |  R8=0000000000000000   R9=0000000000000001
+02367208064i[CPU0  ] | R10=0000000000000000  R11=0000000000000002
+02367208064i[CPU0  ] | R12=0000000000000000  R13=0000000000000000
+02367208064i[CPU0  ] | R14=00000000002320c0  R15=00000000001297e0
+02367208064i[CPU0  ] | EFLAGS=00000087: id vip vif ac vm rf nt IOPL=0 of df if tf SF zf af PF CF
+02367208064i[CPU0  ] | SEG sltr(index|ti|rpl)     base    limit G D
+02367208064i[CPU0  ] |  CS:0008( 0001| 0|  0) 00000000 ffffffff 1 0
+02367208064i[CPU0  ] |  DS:0010( 0002| 0|  0) 00000000 ffffffff 1 1
+02367208064i[CPU0  ] |  SS:0010( 0002| 0|  0) 00000000 ffffffff 1 1
+02367208064i[CPU0  ] |  ES:0010( 0002| 0|  0) 00000000 ffffffff 1 1
+02367208064i[CPU0  ] |  FS:0010( 0002| 0|  0) 00000000 ffffffff 1 1
+02367208064i[CPU0  ] |  GS:0010( 0002| 0|  0) 00000000 ffffffff 1 1
+02367208064i[CPU0  ] |  MSR_FS_BASE:0000000000000000
+02367208064i[CPU0  ] |  MSR_GS_BASE:0000000000000000
+02367208064i[CPU0  ] | RIP=0000000000110ed5 (0000000000110ed0)
+02367208064i[CPU0  ] | CR0=0x80010033: PG cd nw ac WP NE ET ts em MP PE
+02367208064i[CPU0  ] | CR2=0x0000000000000000
+02367208064i[CPU0  ] | CR3=0x000000000fa01000
+02367208064i[CPU0  ] | CR4=0x00000668: lass uintr pks cet pke smap smep keylock osxsave pcid fsgsbase smx vmx la57 umip OSXMMEXCPT OSFXSR pce pge MCE PAE pse DE tsd pvi vme
+02367208064i[CPU0  ] 0x0000000000110ed0>> mov rsi, qword ptr ds:[r13+rdx+8] : 498B741508
+02367208064i[CMOS  ] Last time: 1755875601 tz=utc (Fri Aug 22 15:13:21   2025)
+02367208064i[      ] restoring default signal behavior
+02367208064i[SIM   ] quit_sim called with exit code 1
--- a/nel_os_bootloader/bochsrc
+++ b/nel_os_bootloader/bochsrc
@@ -0,0 +1,20 @@
+# ---- 画面/入力 ----
+display_library: sdl2
+vga: extension=cirrus
+pci: enabled=1, chipset=i440fx, slot1=pcivga
+vgaromimage: file=$BXSHARE/VGABIOS-lgpl-latest-cirrus.bin
+
+romimage: file="./OVMF-pure-efi.fd", address=0x0, options=none
+
+# ---- メモリ/CPU ----
+memory: guest=256
+cpu: count=1, model=corei7_sandy_bridge_2600k, reset_on_triple_fault=1
+
+# ---- ストレージ（UEFI ESP を作った “本物のディスク” ）----
+ata0: enabled=1
+ata0-master: type=disk, mode=flat, path="./myOSimage.img", status=inserted
+boot: disk
+
+# ---- ログ ----
+log: bochs.out
+
--- a/nel_os_bootloader/create-iso.sh
+++ b/nel_os_bootloader/create-iso.sh
@@ -1,9 +1,16 @@
-#!/bin/sh -ex
+#!/bin/bash -ex

 EFI_BINARY="$1"

 cd ../nel_os_kernel
-cargo build --release -q
+if [[ "$EFI_BINARY" == "target/x86_64-unknown-uefi/release/"* ]]; then
+	cargo build --release -q
+elif [[ "$EFI_BINARY" == "target/x86_64-unknown-uefi/debug/"* ]]; then
+	cargo build -q
+else
+	echo "Error: EFI binary path must contain either '/target/x86_64-unknown-uefi/release/' or '/target/x86_64-unknown-uefi/debug/'"
+	exit 1
+fi
 cd ../nel_os_bootloader

 dd if=/dev/zero of=fat.img bs=1k count=32768
--- a/nel_os_bootloader/esp/NvVars
+++ b/nel_os_bootloader/esp/NvVars
--- a/nel_os_bootloader/esp/vvfat_attr.cfg
+++ b/nel_os_bootloader/esp/vvfat_attr.cfg
--- a/nel_os_bootloader/myOSimage.img
+++ b/nel_os_bootloader/myOSimage.img
--- a/nel_os_bootloader/qemu.log
+++ b/nel_os_bootloader/qemu.log
@@ -1,56 +0,0 @@
-CPU Reset (CPU 0)
-EAX=00000000 EBX=00000000 ECX=00000000 EDX=00000000
-ESI=00000000 EDI=00000000 EBP=00000000 ESP=00000000
-EIP=00000000 EFL=00000000 [-------] CPL=0 II=0 A20=0 SMM=0 HLT=0
-ES =0000 00000000 00000000 00000000
-CS =0000 00000000 00000000 00000000
-SS =0000 00000000 00000000 00000000
-DS =0000 00000000 00000000 00000000
-FS =0000 00000000 00000000 00000000
-GS =0000 00000000 00000000 00000000
-LDT=0000 00000000 00000000 00000000
-TR =0000 00000000 00000000 00000000
-GDT=     00000000 00000000
-IDT=     00000000 00000000
-CR0=00000000 CR2=00000000 CR3=00000000 CR4=00000000
-DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 
-DR6=0000000000000000 DR7=0000000000000000
-CCS=00000000 CCD=00000000 CCO=DYNAMIC
-EFER=0000000000000000
-FCW=0000 FSW=0000 [ST=0] FTW=ff MXCSR=00000000
-FPR0=0000000000000000 0000 FPR1=0000000000000000 0000
-FPR2=0000000000000000 0000 FPR3=0000000000000000 0000
-FPR4=0000000000000000 0000 FPR5=0000000000000000 0000
-FPR6=0000000000000000 0000 FPR7=0000000000000000 0000
-XMM00=0000000000000000 0000000000000000 XMM01=0000000000000000 0000000000000000
-XMM02=0000000000000000 0000000000000000 XMM03=0000000000000000 0000000000000000
-XMM04=0000000000000000 0000000000000000 XMM05=0000000000000000 0000000000000000
-XMM06=0000000000000000 0000000000000000 XMM07=0000000000000000 0000000000000000
-CPU Reset (CPU 0)
-EAX=00000000 EBX=00000000 ECX=00000000 EDX=00060fb1
-ESI=00000000 EDI=00000000 EBP=00000000 ESP=00000000
-EIP=0000fff0 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
-ES =0000 00000000 0000ffff 00009300
-CS =f000 ffff0000 0000ffff 00009b00
-SS =0000 00000000 0000ffff 00009300
-DS =0000 00000000 0000ffff 00009300
-FS =0000 00000000 0000ffff 00009300
-GS =0000 00000000 0000ffff 00009300
-LDT=0000 00000000 0000ffff 00008200
-TR =0000 00000000 0000ffff 00008b00
-GDT=     00000000 0000ffff
-IDT=     00000000 0000ffff
-CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000
-DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 
-DR6=00000000ffff0ff0 DR7=0000000000000400
-CCS=00000000 CCD=00000000 CCO=DYNAMIC
-EFER=0000000000000000
-FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80
-FPR0=0000000000000000 0000 FPR1=0000000000000000 0000
-FPR2=0000000000000000 0000 FPR3=0000000000000000 0000
-FPR4=0000000000000000 0000 FPR5=0000000000000000 0000
-FPR6=0000000000000000 0000 FPR7=0000000000000000 0000
-XMM00=0000000000000000 0000000000000000 XMM01=0000000000000000 0000000000000000
-XMM02=0000000000000000 0000000000000000 XMM03=0000000000000000 0000000000000000
-XMM04=0000000000000000 0000000000000000 XMM05=0000000000000000 0000000000000000
-XMM06=0000000000000000 0000000000000000 XMM07=0000000000000000 0000000000000000
--- a/nel_os_bootloader/run-qemu.sh
+++ b/nel_os_bootloader/run-qemu.sh
@@ -6,10 +6,9 @@ EFI_BINARY="$1"
 ./create-iso.sh "$EFI_BINARY"

 qemu-system-x86_64 -enable-kvm \
-    -m 4G \
+    -m 512M \
    -serial mon:stdio \
 	-nographic \
-    -no-reboot \
    -drive if=pflash,format=raw,readonly=on,file=OVMF_CODE.fd \
    -drive if=pflash,format=raw,readonly=on,file=OVMF_VARS.fd \
 	-cdrom nel_os.iso \
--- a/nel_os_bootloader/src/main.rs
+++ b/nel_os_bootloader/src/main.rs
@@ -131,9 +131,20 @@ fn load_elf(bin: Box<[u8]>) -> u64 {
    elf.entry
 }

-fn get_frame_buffer() -> gop::FrameBuffer {
-    let gop_handle = uefi::boot::get_handle_for_protocol::<GraphicsOutput>().unwrap();
-    let mut gop = boot::open_protocol_exclusive::<GraphicsOutput>(gop_handle).unwrap();
+fn get_frame_buffer() -> Option<gop::FrameBuffer> {
+    let gop_handle = if let Ok(gop_handle) = uefi::boot::get_handle_for_protocol::<GraphicsOutput>()
+    {
+        gop_handle
+    } else {
+        println!("GraphicsOutput protocol not found");
+        return None;
+    };
+    let mut gop = if let Ok(gop) = boot::open_protocol_exclusive::<GraphicsOutput>(gop_handle) {
+        gop
+    } else {
+        println!("Failed to open GraphicsOutput protocol");
+        return None;
+    };

    let info = gop.current_mode_info();
    let (width, height) = info.resolution();
@@ -141,7 +152,7 @@ fn get_frame_buffer() -> gop::FrameBuffer {
    let stride = info.stride();
    let pixel_format = info.pixel_format();

-    gop::FrameBuffer {
+    Some(gop::FrameBuffer {
        frame_buffer,
        width,
        height,
@@ -151,15 +162,15 @@ fn get_frame_buffer() -> gop::FrameBuffer {
            PixelFormat::Bgr => gop::PixelFormat::Bgr,
            format => panic!("Unsupported pixel_format: {:?}", format),
        },
-    }
+    })
 }

-fn get_rsdp() -> u64 {
+fn get_rsdp() -> Option<u64> {
    uefi::system::with_config_table(move |c| {
        c.iter()
            .find(|config| config.guid == uefi::table::cfg::ACPI_GUID)
            .map(|config| config.address as u64)
-            .expect("Failed to find RSDP in config table")
+            .or(None)
    })
 }

--- a/nel_os_bootloader/update_img.sh
+++ b/nel_os_bootloader/update_img.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+cargo b -r
+sudo mount /dev/loop0 /mnt
+sudo cp ./target/x86_64-unknown-uefi/release/nel_os_bootloader.efi /mnt/EFI/BOOT/BOOTX64.EFI
+sudo sync
+sudo umount /mnt
--- a/nel_os_common/src/lib.rs
+++ b/nel_os_common/src/lib.rs
@@ -7,8 +7,8 @@ pub mod memory;

 pub struct BootInfo {
    pub usable_memory: UsableMemory,
-    pub frame_buffer: FrameBuffer,
-    pub rsdp: u64,
+    pub frame_buffer: Option<FrameBuffer>,
+    pub rsdp: Option<u64>,
    pub bzimage_addr: u64,
    pub bzimage_size: u64,
    pub rootfs_addr: u64,
--- a/nel_os_kernel/src/constant.rs
+++ b/nel_os_kernel/src/constant.rs
@@ -13,7 +13,4 @@ pub const HEAP_START: usize = 0x4444_4444_0000;
 pub const HEAP_SIZE: usize = 128 * 1024;

 pub const PAGE_SIZE: usize = 4096;
-pub const MAX_MEMORY: usize = 256 * 1024 * 1024 * 1024;
-pub const FRAME_COUNT: usize = MAX_MEMORY / PAGE_SIZE;
 pub const BITS_PER_ENTRY: usize = 8 * core::mem::size_of::<usize>();
-pub const ENTRY_COUNT: usize = FRAME_COUNT / BITS_PER_ENTRY;
--- a/nel_os_kernel/src/interrupt/idt.rs
+++ b/nel_os_kernel/src/interrupt/idt.rs
@@ -5,6 +5,7 @@ use crate::{
    interrupt::{
        apic::{EOI, LAPIC},
        gdt,
+        subscriber::InterruptContext,
    },
    time, warn,
 };
@@ -40,6 +41,17 @@ pub fn init_idt() {
 }

 extern "x86-interrupt" fn breakpoint_handler(stack_frame: InterruptStackFrame) {
+    let context = InterruptContext {
+        vector: 3,
+        instruction_pointer: stack_frame.instruction_pointer.as_u64(),
+        code_segment: stack_frame.code_segment.0 as u64,
+        cpu_flags: stack_frame.cpu_flags.bits(),
+        stack_pointer: stack_frame.stack_pointer.as_u64(),
+        stack_segment: stack_frame.stack_segment.0 as u64,
+    };
+
+    crate::interrupt::subscriber::dispatch_to_subscribers(&context);
+
    warn!("EXCEPTION: BREAKPOINT\n{:#?}", stack_frame);
 }

@@ -47,6 +59,17 @@ extern "x86-interrupt" fn double_fault_handler(
    stack_frame: InterruptStackFrame,
    _error_code: u64,
 ) -> ! {
+    let context = InterruptContext {
+        vector: 8,
+        instruction_pointer: stack_frame.instruction_pointer.as_u64(),
+        code_segment: stack_frame.code_segment.0 as u64,
+        cpu_flags: stack_frame.cpu_flags.bits(),
+        stack_pointer: stack_frame.stack_pointer.as_u64(),
+        stack_segment: stack_frame.stack_segment.0 as u64,
+    };
+
+    crate::interrupt::subscriber::dispatch_to_subscribers(&context);
+
    panic!("EXCEPTION: DOUBLE FAULT\n{:#?}", stack_frame);
 }

@@ -56,6 +79,17 @@ extern "x86-interrupt" fn page_fault_handler(
 ) {
    use x86_64::registers::control::Cr2;

+    let context = InterruptContext {
+        vector: 14,
+        instruction_pointer: stack_frame.instruction_pointer.as_u64(),
+        code_segment: stack_frame.code_segment.0 as u64,
+        cpu_flags: stack_frame.cpu_flags.bits(),
+        stack_pointer: stack_frame.stack_pointer.as_u64(),
+        stack_segment: stack_frame.stack_segment.0 as u64,
+    };
+
+    crate::interrupt::subscriber::dispatch_to_subscribers(&context);
+
    panic!(
        "EXCEPTION: PAGE FAULT\n{:#?}\nAccessed address: {:#x}",
        stack_frame,
@@ -63,7 +97,18 @@ extern "x86-interrupt" fn page_fault_handler(
    );
 }

-extern "x86-interrupt" fn timer_handler(_stack_frame: InterruptStackFrame) {
+extern "x86-interrupt" fn timer_handler(stack_frame: InterruptStackFrame) {
+    let context = InterruptContext {
+        vector: IRQ_TIMER as u8,
+        instruction_pointer: stack_frame.instruction_pointer.as_u64(),
+        code_segment: stack_frame.code_segment.0 as u64,
+        cpu_flags: stack_frame.cpu_flags.bits(),
+        stack_pointer: stack_frame.stack_pointer.as_u64(),
+        stack_segment: stack_frame.stack_segment.0 as u64,
+    };
+
+    crate::interrupt::subscriber::dispatch_to_subscribers(&context);
+
    time::tick();
    LAPIC.get().unwrap().write(EOI, 0);
 }
--- a/nel_os_kernel/src/interrupt/mod.rs
+++ b/nel_os_kernel/src/interrupt/mod.rs
@@ -1,3 +1,4 @@
 pub mod apic;
 pub mod gdt;
 pub mod idt;
+pub mod subscriber;
--- a/nel_os_kernel/src/interrupt/subscriber.rs
+++ b/nel_os_kernel/src/interrupt/subscriber.rs
@@ -0,0 +1,66 @@
+use spin::Mutex;
+
+#[derive(Debug)]
+pub struct InterruptContext {
+    pub vector: u8,
+    pub instruction_pointer: u64,
+    pub code_segment: u64,
+    pub cpu_flags: u64,
+    pub stack_pointer: u64,
+    pub stack_segment: u64,
+}
+
+pub type SubscriberCallback = fn(*mut core::ffi::c_void, &InterruptContext);
+
+#[derive(Debug, Clone, Copy)]
+pub struct Subscriber {
+    pub callback: SubscriberCallback,
+    pub context: *mut core::ffi::c_void,
+}
+
+unsafe impl Send for Subscriber {}
+unsafe impl Sync for Subscriber {}
+
+const MAX_SUBSCRIBERS: usize = 10;
+
+static SUBSCRIBERS: Mutex<[Option<Subscriber>; MAX_SUBSCRIBERS]> =
+    Mutex::new([None; MAX_SUBSCRIBERS]);
+
+pub fn subscribe(
+    callback: SubscriberCallback,
+    context: *mut core::ffi::c_void,
+) -> Result<(), &'static str> {
+    let mut subscribers = SUBSCRIBERS.lock();
+
+    for slot in subscribers.iter_mut() {
+        if slot.is_none() {
+            *slot = Some(Subscriber { callback, context });
+            return Ok(());
+        }
+    }
+
+    Err("No available subscriber slots")
+}
+
+pub fn unsubscribe(callback: SubscriberCallback) -> Result<(), &'static str> {
+    let mut subscribers = SUBSCRIBERS.lock();
+
+    for slot in subscribers.iter_mut() {
+        if let Some(subscriber) = slot {
+            if core::ptr::fn_addr_eq(subscriber.callback, callback) {
+                *slot = None;
+                return Ok(());
+            }
+        }
+    }
+
+    Err("Subscriber not found")
+}
+
+pub fn dispatch_to_subscribers(context: &InterruptContext) {
+    let subscribers = SUBSCRIBERS.lock();
+
+    for subscriber in subscribers.iter().flatten() {
+        (subscriber.callback)(subscriber.context, context);
+    }
+}
--- a/nel_os_kernel/src/logging.rs
+++ b/nel_os_kernel/src/logging.rs
@@ -1,14 +1,14 @@
 #[macro_export]
 macro_rules! info {
-    ($($arg:tt)*) => ($crate::print!("[{:>12.5} I] {}\n", crate::time::get_ticks() as f64 / 1000., format_args!($($arg)*)));
+    ($($arg:tt)*) => ($crate::print!("[{:>12.5} I] {}\n", $crate::time::get_ticks() as f64 / 1000., format_args!($($arg)*)));
 }

 #[macro_export]
 macro_rules! error {
-    ($($arg:tt)*) => ($crate::print!("[{:>12.5} E] {}\n", crate::time::get_ticks() as f64 / 1000., format_args!($($arg)*)));
+    ($($arg:tt)*) => ($crate::print!("[{:>12.5} E] {}\n", $crate::time::get_ticks() as f64 / 1000., format_args!($($arg)*)));
 }

 #[macro_export]
 macro_rules! warn {
-    ($($arg:tt)*) => ($crate::print!("[{:>12.5} W] {}\n", crate::time::get_ticks() as f64 / 1000., format_args!($($arg)*)));
+    ($($arg:tt)*) => ($crate::print!("[{:>12.5} W] {}\n", $crate::time::get_ticks() as f64 / 1000., format_args!($($arg)*)));
 }
--- a/nel_os_kernel/src/main.rs
+++ b/nel_os_kernel/src/main.rs
@@ -30,7 +30,7 @@ use crate::{
    constant::{KERNEL_STACK_SIZE, PKG_VERSION},
    graphics::{FrameBuffer, FRAME_BUFFER},
    interrupt::apic,
-    memory::{allocator, memory::BitmapMemoryTable, paging},
+    memory::{allocator, bitmap::BitmapMemoryTable, paging},
 };

 pub static BZIMAGE_ADDR: Once<u64> = Once::new();
@@ -82,6 +82,8 @@ fn hlt_loop() -> ! {

 #[unsafe(no_mangle)]
 pub extern "sysv64" fn main(boot_info: &nel_os_common::BootInfo) {
+    serial::disable_screen_output();
+
    interrupt::gdt::init();
    interrupt::idt::init_idt();

@@ -96,10 +98,13 @@ pub extern "sysv64" fn main(boot_info: &nel_os_common::BootInfo) {

    let ranges = boot_info.usable_memory.ranges();
    let mut count = 0;
+    let mut max_range = 0;
    for range in ranges {
        count += range.end - range.start;
+        max_range = max_range.max(range.end);
    }
    info!("Usable memory: {}MiB", count / 1024 / 1024);
+    memory::bitmap::MAX_MEMORY.call_once(|| max_range as usize * 2);

    let mut bitmap_table = BitmapMemoryTable::init(&boot_info.usable_memory);
    info!(
@@ -126,10 +131,15 @@ pub extern "sysv64" fn main(boot_info: &nel_os_common::BootInfo) {

    allocator::init_heap(&mut mapper, &mut bitmap_table).unwrap();

-    let frame_buffer = FrameBuffer::from_raw_buffer(&boot_info.frame_buffer, (64, 64, 64));
-    frame_buffer.clear();
+    if boot_info.frame_buffer.is_some() {
+        let frame_buffer =
+            FrameBuffer::from_raw_buffer(boot_info.frame_buffer.as_ref().unwrap(), (64, 64, 64));
+        frame_buffer.clear();

-    FRAME_BUFFER.lock().replace(frame_buffer);
+        FRAME_BUFFER.lock().replace(frame_buffer);
+    } else {
+        error!("No frame buffer found");
+    }

    println!("");
    info!("Kernel initialized successfully");
@@ -150,20 +160,20 @@ pub extern "sysv64" fn main(boot_info: &nel_os_common::BootInfo) {
        usable_frame as f64 * 4. / 1024. / 1024.
    );

-    info!("RSDP: {:#x}", boot_info.rsdp);
+    if let Some(rsdp) = boot_info.rsdp {
+        info!("RSDP: {:#x}", rsdp);

-    let acpi_tables =
-        unsafe { AcpiTables::from_rsdp(KernelAcpiHandler, boot_info.rsdp as usize) }.unwrap();
-    let platform_info = acpi_tables.platform_info().unwrap();
+        let acpi_tables =
+            unsafe { AcpiTables::from_rsdp(KernelAcpiHandler, rsdp as usize) }.unwrap();
+        let platform_info = acpi_tables.platform_info().unwrap();

-    apic::init_local_apic(platform_info);
-    info!("Local APIC initialized",);
+        apic::init_local_apic(platform_info);
+        info!("Local APIC initialized",);

-    x86_64::instructions::interrupts::enable();
+        x86_64::instructions::interrupts::enable();

-    info!("Interrupts enabled");
-
-    serial::disable_screen_output();
+        info!("Interrupts enabled");
+    }

    BZIMAGE_ADDR.call_once(|| boot_info.bzimage_addr);
    BZIMAGE_SIZE.call_once(|| boot_info.bzimage_size);
--- a/nel_os_kernel/src/memory/bitmap.rs
+++ b/nel_os_kernel/src/memory/bitmap.rs
@@ -1,12 +1,19 @@
 use core::slice;

 use nel_os_common::memory::{self, UsableMemory};
+use spin::Once;
 use x86_64::{
    structures::paging::{FrameAllocator, PhysFrame, Size4KiB},
    PhysAddr,
 };

-use crate::constant::{BITS_PER_ENTRY, ENTRY_COUNT, PAGE_SIZE};
+use crate::constant::{BITS_PER_ENTRY, PAGE_SIZE};
+
+pub static MAX_MEMORY: Once<usize> = Once::new();
+
+pub fn get_entry_count() -> usize {
+    MAX_MEMORY.get().unwrap_or(&0) / PAGE_SIZE / BITS_PER_ENTRY
+}

 pub struct BitmapMemoryTable {
    pub used_map: &'static mut [usize],
@@ -21,16 +28,17 @@ impl BitmapMemoryTable {
            max_addr = max_addr.max(range.end);
        }

-        let bitmap_size = ENTRY_COUNT * core::mem::size_of::<usize>();
+        let entry_count = get_entry_count();
+        let bitmap_size = entry_count * core::mem::size_of::<usize>();

        let bitmap_addr = ((max_addr as usize).saturating_sub(bitmap_size)) & !(PAGE_SIZE - 1);

        let used_map = unsafe {
            let ptr = bitmap_addr as *mut usize;
-            slice::from_raw_parts_mut(ptr, ENTRY_COUNT)
+            slice::from_raw_parts_mut(ptr, entry_count)
        };

-        (0..ENTRY_COUNT).for_each(|i| {
+        (0..entry_count).for_each(|i| {
            used_map[i] = 0;
        });

@@ -50,8 +58,8 @@ impl BitmapMemoryTable {
            table.set_frame(bitmap_start_frame + i, false);
        }

-        for i in 0..ENTRY_COUNT {
-            let index = ENTRY_COUNT - i - 1;
+        for i in 0..entry_count {
+            let index = entry_count - i - 1;
            if table.used_map[index] != 0 {
                let offset = 63 - table.used_map[index].leading_zeros();
                table.end = index * BITS_PER_ENTRY + (BITS_PER_ENTRY - offset as usize);
--- a/nel_os_kernel/src/memory/mod.rs
+++ b/nel_os_kernel/src/memory/mod.rs
@@ -1,3 +1,3 @@
 pub mod allocator;
-pub mod memory;
+pub mod bitmap;
 pub mod paging;
--- a/nel_os_kernel/src/serial.rs
+++ b/nel_os_kernel/src/serial.rs
@@ -47,6 +47,27 @@ pub fn _print(args: ::core::fmt::Arguments) {
    });
 }

+#[inline(always)]
+pub fn write_byte(byte: u8) {
+    use x86_64::instructions::interrupts;
+
+    interrupts::without_interrupts(|| {
+        SERIAL1.lock().send(byte);
+    });
+}
+
+#[inline(always)]
+pub fn write_bytes(bytes: &[u8]) {
+    use x86_64::instructions::interrupts;
+
+    interrupts::without_interrupts(|| {
+        let mut serial = SERIAL1.lock();
+        for &b in bytes {
+            serial.send(b);
+        }
+    });
+}
+
 #[macro_export]
 macro_rules! print {
    ($($arg:tt)*) => {
--- a/nel_os_kernel/src/vmm/x86_64/amd/mod.rs
+++ b/nel_os_kernel/src/vmm/x86_64/amd/mod.rs
@@ -1 +1,2 @@
 pub mod vcpu;
+pub mod vmcb;
--- a/nel_os_kernel/src/vmm/x86_64/amd/vcpu.rs
+++ b/nel_os_kernel/src/vmm/x86_64/amd/vcpu.rs
@@ -3,18 +3,32 @@ use x86_64::structures::paging::{FrameAllocator, Size4KiB};

 use crate::{
    error, info,
-    vmm::{x86_64::common, VCpu},
+    vmm::{
+        x86_64::{amd::vmcb::Vmcb, common},
+        VCpu,
+    },
 };

-pub struct AMDVCpu;
+pub struct AMDVCpu {
+    vmcb: Vmcb,
+}
+
+impl AMDVCpu {
+    pub fn setup(&mut self) -> Result<(), &'static str> {
+        info!("Setting up AMD VCPU");
+
+        let raw_vmcb = self.vmcb.get_raw_vmcb();
+        raw_vmcb.set_intercept_hlt(true);
+
+        Ok(())
+    }
+}

 impl VCpu for AMDVCpu {
    fn run(
        &mut self,
        _frame_allocator: &mut dyn FrameAllocator<Size4KiB>,
    ) -> Result<(), &'static str> {
-        info!("VCpu on AMD");
-
        Ok(())
    }

@@ -39,7 +53,7 @@ impl VCpu for AMDVCpu {
        unimplemented!("AMDVCpu::get_guest_memory_size is not implemented yet")
    }

-    fn new(_frame_allocator: &mut impl FrameAllocator<Size4KiB>) -> Result<Self, &'static str>
+    fn new(frame_allocator: &mut impl FrameAllocator<Size4KiB>) -> Result<Self, &'static str>
    where
        Self: Sized,
    {
@@ -47,7 +61,9 @@ impl VCpu for AMDVCpu {
        efer |= 1 << 12;
        common::write_msr(0xc000_0080, efer);

-        Ok(AMDVCpu)
+        Ok(AMDVCpu {
+            vmcb: Vmcb::new(frame_allocator)?,
+        })
    }

    fn is_supported() -> bool
--- a/nel_os_kernel/src/vmm/x86_64/amd/vmcb.rs
+++ b/nel_os_kernel/src/vmm/x86_64/amd/vmcb.rs
@@ -0,0 +1,170 @@
+#![allow(non_snake_case)]
+
+use modular_bitfield::{bitfield, prelude::*};
+use x86_64::structures::paging::{FrameAllocator, PhysFrame, Size4KiB};
+
+pub struct Vmcb {
+    pub frame: PhysFrame,
+}
+
+impl Vmcb {
+    pub fn new(frame_allocator: &mut impl FrameAllocator<Size4KiB>) -> Result<Self, &'static str> {
+        let frame = frame_allocator
+            .allocate_frame()
+            .ok_or("Failed to allocate VMCB frame")?;
+        Ok(Vmcb { frame })
+    }
+
+    pub fn get_raw_vmcb(&self) -> &mut RawVmcb {
+        let ptr = self.frame.start_address().as_u64() as *mut RawVmcb;
+        unsafe { &mut *ptr }
+    }
+}
+
+#[bitfield]
+pub struct RawVmcb {
+    // 000h
+    pub intercept_cr_read: B16,
+    pub intercept_cr_write: B16,
+    // 004h
+    pub intercept_dr_read: B16,
+    pub intercept_dr_write: B16,
+    // 008h
+    pub intercept_exceptions: B32,
+    // 00Ch
+    pub intercept_intr: bool,
+    pub intercept_nmi: bool,
+    pub intercept_smi: bool,
+    pub intercept_init: bool,
+    pub intercept_vintr: bool,
+    pub intercept_cr0_write_ts_or_mp: bool,
+    pub intercept_read_idtr: bool,
+    pub intercept_read_gdtr: bool,
+    pub intercept_read_ldtr: bool,
+    pub intercept_read_tr: bool,
+    pub intercept_write_idtr: bool,
+    pub intercept_write_gdtr: bool,
+    pub intercept_write_ldtr: bool,
+    pub intercept_write_tr: bool,
+    pub intercept_rdtsc: bool,
+    pub intercept_rdpmc: bool,
+    pub intercept_pushf: bool,
+    pub intercept_popf: bool,
+    pub intercept_cpuid: bool,
+    pub intercept_rsm: bool,
+    pub intercept_iret: bool,
+    pub intercept_int_n: bool,
+    pub intercept_invd: bool,
+    pub intercept_pause: bool,
+    pub intercept_hlt: bool,
+    pub intercept_invlpg: bool,
+    pub intercept_invlpga: bool,
+    pub intercept_ioio_prot: bool,
+    pub intercept_msr_prot: bool,
+    pub intercept_task_switch: bool,
+    pub intercept_ferr_freeze: bool,
+    pub intercept_shutdown: bool,
+    // 010h
+    pub intercept_vmrun: bool,
+    pub intercept_vmcall: bool,
+    pub intercept_vmload: bool,
+    pub intercept_vmsave: bool,
+    pub intercept_stgi: bool,
+    pub intercept_clgi: bool,
+    pub intercept_skinit: bool,
+    pub intercept_rdtscp: bool,
+    pub intercept_icebp: bool,
+    pub intercept_wbinvd_and_wbnoinvd: bool,
+    pub intercept_monitor_and_monitorx: bool,
+    pub intercept_mwait_and_mwaitx_unconditionally: bool,
+    pub intercept_mwait_and_mwaitx: bool,
+    pub intercept_xsetbv: bool,
+    pub intercept_rdpru: bool,
+    pub intercept_write_efer_after_guest_inst_finish: bool,
+    pub intercept_write_cr0_after_guest_inst_finish: B16,
+    // 014h
+    pub intercept_all_invlpgb: bool,
+    pub intercept_illegally_specified_invlpgb: bool,
+    pub intercept_invpcid: bool,
+    pub intercept_mcommit: bool,
+    pub intercept_tlbsync: bool,
+    pub intercept_bus_lock: bool,
+    pub intercept_idle_hlt: bool,
+    _reserved1: B25,
+    // 018h-03Bh
+    _reserved2: B128,
+    _reserved3: B128,
+    _reserved4: B32,
+    // 03Ch
+    pub pause_filter_threshold: B16,
+    // 03Eh
+    pub pause_filter_count: B16,
+    // 040h
+    pub iopm_base_physical_address: B64,
+    // 048h
+    pub msrpm_base_physical_address: B64,
+    // 050h
+    pub tsc_offset: B64,
+    // 058h
+    pub guest_asid: B32,
+    pub tlb_control: TlbControl,
+    pub allow_larger_rap: bool,
+    pub clear_rap_on_vmrun: bool,
+    _reserved5: B22,
+    // 060h
+    pub v_tpr: B8,
+    pub v_irq: bool,
+    pub vgif: bool,
+    pub v_nmi: bool,
+    pub v_nmi_mask: bool,
+    _reserved6: B3,
+    pub v_intr_prio: B4,
+    pub v_ign_tpr: bool,
+    _reserved7: B3,
+    pub v_intr_masking: bool,
+    pub amd_virtual_gif: bool,
+    pub v_nmi_enable: bool,
+    _reserved8: B3,
+    pub x2avic_enable: bool,
+    pub avic_enable: bool,
+    pub v_intr_vector: B8,
+    _reserved9: B24,
+    // 068h
+    pub interrupt_shadow: bool,
+    pub guest_interrupt_mask: bool,
+    _reserved10: B62,
+    // 070h
+    pub exit_code: B64,
+    // 078h
+    pub exit_info1: B64,
+    // 080h
+    pub exit_info2: B64,
+    // 088h
+    pub exit_int_info: B64,
+    // 090h
+    pub np_enable: bool,
+    pub enable_sev: bool,
+    pub enable_encrypted_state: bool,
+    pub guest_mode_execution_trap: bool,
+    pub sss_check_enable: bool,
+    pub virtual_transparent_encryption: bool,
+    pub enable_read_only_guest_page_table: bool,
+    pub enable_invlpgb_and_tlbsync: bool,
+    _reserved11: B56,
+    // 098h
+    _reserved12: B12,
+    pub avic_apic_bar: B52,
+}
+
+#[derive(Specifier, Debug, Clone, Copy, PartialEq, Eq)]
+#[repr(u8)]
+pub enum TlbControl {
+    DoNothing = 0,
+    FlushAll = 1,
+    _RESERVED1 = 2,
+    FlushGuest = 3,
+    _RESERVED2 = 4,
+    FlushHost = 5,
+    _RESERVED3 = 6,
+    FlushGuestNonGlobal = 7,
+}
--- a/nel_os_kernel/src/vmm/x86_64/common/linux.rs
+++ b/nel_os_kernel/src/vmm/x86_64/common/linux.rs
@@ -10,6 +10,12 @@ pub fn load_kernel(vcpu: &mut dyn VCpu) -> Result<(), &'static str> {
    let kernel =
        unsafe { core::slice::from_raw_parts(*kernel_addr as *const u8, *kernel_size as usize) };

+    let initrd_addr = crate::ROOTFS_ADDR.get().unwrap();
+    let initrd_size = crate::ROOTFS_SIZE.get().unwrap();
+
+    let initrd =
+        unsafe { core::slice::from_raw_parts(*initrd_addr as *const u8, *initrd_size as usize) };
+
    info!("Creating boot parameters");
    let guest_mem_size = vcpu.get_guest_memory_size();
    let mut bp = BootParams::from_bytes(kernel)?;
@@ -23,6 +29,8 @@ pub fn load_kernel(vcpu: &mut dyn VCpu) -> Result<(), &'static str> {
    bp.hdr.loadflags.set_keep_segments(true);
    bp.hdr.cmd_line_ptr = LAYOUT_CMDLINE as u32;
    bp.hdr.vid_mode = 0xFFFF;
+    bp.hdr.ramdisk_image = LAYOUT_INITRD as u32;
+    bp.hdr.ramdisk_size = initrd.len() as u32;

    bp.add_e820_entry(0, LAYOUT_KERNEL_BASE, E820Type::Ram);
    bp.add_e820_entry(
@@ -38,7 +46,7 @@ pub fn load_kernel(vcpu: &mut dyn VCpu) -> Result<(), &'static str> {
        256
    };

-    let cmdline_start = LAYOUT_CMDLINE as u64;
+    let cmdline_start = LAYOUT_CMDLINE;
    let cmdline_end = cmdline_start + cmdline_max_size as u64;
    vcpu.write_memory_ranged(cmdline_start, cmdline_end, 0)?;
    let cmdline_val = "console=ttyS0 earlyprintk=serial nokaslr";
@@ -65,6 +73,9 @@ pub fn load_kernel(vcpu: &mut dyn VCpu) -> Result<(), &'static str> {
        LAYOUT_KERNEL_BASE as usize,
    )?;

+    info!("Loading initrd image into guest memory");
+    load_image(vcpu, initrd, LAYOUT_INITRD as usize)?;
+
    Ok(())
 }

@@ -117,11 +128,17 @@ pub struct BootParams {
    pub _unimplemented: [u8; 0x330],
 }

+impl Default for BootParams {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl BootParams {
    pub const E820MAX: usize = 128;

    pub fn new() -> Self {
-        let params = Self {
+        Self {
            _screen_info: [0; 0x40],
            _apm_bios_info: [0; 0x14],
            _pad2: [0; 4],
@@ -151,9 +168,7 @@ impl BootParams {
                type_: E820Type::Ram as u32,
            }; Self::E820MAX],
            _unimplemented: [0; 0x330],
-        };
-
-        params
+        }
    }

    pub fn from_bytes(bytes: &[u8]) -> Result<Self, &'static str> {
--- a/nel_os_kernel/src/vmm/x86_64/intel/auditor/controls.rs
+++ b/nel_os_kernel/src/vmm/x86_64/intel/auditor/controls.rs
@@ -2,7 +2,14 @@ use x86::{msr, vmx::vmcs};

 use crate::vmm::x86_64::{
    common::read_msr,
-    intel::{self, vmread},
+    intel::{
+        self,
+        vmcs::controls::{
+            PinBasedVmExecutionControls, PrimaryProcessorBasedVmExecutionControls,
+            SecondaryProcessorBasedVmExecutionControls,
+        },
+        vmread,
+    },
 };

 pub fn check_vmcs_control_fields() -> Result<(), &'static str> {
@@ -21,10 +28,158 @@ pub fn check_vmcs_control_fields() -> Result<(), &'static str> {
    check_cr3_target()?;

    check_io_bitmap()?;
+    check_msr_bitmap()?;
+
+    check_nmi()?;
+
+    check_vmcs_shadowing()?;
+    check_ept_violation_exception_info()?;
+    check_interrupt()?;
+
+    check_ept()?;

    Ok(())
 }

+fn is_valid_ept_ptr(ept_ptr: u64) -> Result<(), &'static str> {
+    let memory_type = ept_ptr & 0b111;
+    if memory_type != 0 && memory_type != 6 {
+        return Err("VMCS Ept pointer memory type is not valid (must be 0 or 6)");
+    }
+
+    let walk_length = (ept_ptr >> 3) & 0b111;
+    if walk_length != 3 {
+        return Err("VMCS Ept pointer walk length is not valid (must be 3)");
+    }
+
+    if ept_ptr & 0xf00 != 0 {
+        return Err("VMCS Ept pointer reserved bits are not zero");
+    }
+
+    if !is_valid_phys_addr(ept_ptr) {
+        return Err("VMCS Ept pointer is not a valid physical address");
+    }
+
+    Ok(())
+}
+
+fn check_ept() -> Result<(), &'static str> {
+    let secondary_exec_ctrl = SecondaryProcessorBasedVmExecutionControls::read()?;
+
+    if secondary_exec_ctrl.ept() {
+        let ept_ptr = vmread(vmcs::control::EPTP_FULL)?;
+        is_valid_ept_ptr(ept_ptr)?;
+    } else {
+        if secondary_exec_ctrl.unrestricted_guest() {
+            return Err(
+                "VMCS Secondary processor-based execution controls field: Ept is not set while unrestricted guest is set",
+            );
+        }
+        if secondary_exec_ctrl.mode_based_control_ept() {
+            return Err(
+                "VMCS Secondary processor-based execution controls field: Ept is not set while mode-based control for Ept is set",
+            );
+        }
+    }
+
+    Ok(())
+}
+
+fn check_interrupt() -> Result<(), &'static str> {
+    let primary_exec_ctrl = PrimaryProcessorBasedVmExecutionControls::read()?;
+    let secondary_exec_ctrl = SecondaryProcessorBasedVmExecutionControls::read()?;
+    let pin_ctrl = PinBasedVmExecutionControls::read()?;
+
+    if primary_exec_ctrl.use_tpr_shadow() {
+        let virtual_apic_page_addr = vmread(vmcs::control::VIRT_APIC_ADDR_FULL)?;
+        if !is_valid_page_aligned_phys_addr(virtual_apic_page_addr) {
+            return Err(
+                "VMCS virtual APIC page address is not a valid page-aligned physical address",
+            );
+        }
+
+        if !secondary_exec_ctrl.virtual_interrupt_delivery() {
+            if !pin_ctrl.external_interrupt_exiting() {
+                return Err(
+                    "VMCS Pin-based execution controls field: External interrupt exiting is not set while virtual interrupt delivery is set",
+                );
+            }
+        } else {
+            // TODO
+        }
+    } else if secondary_exec_ctrl.virtualize_x2apic_mode()
+        || secondary_exec_ctrl.apic_register_virtualization()
+        || secondary_exec_ctrl.virtual_interrupt_delivery()
+    {
+        return Err(
+            "VMCS Primary processor-based execution controls field: Use TPR shadow is not set while virtualize x2APIC mode, APIC register virtualization, or virtual interrupt delivery is set",
+        );
+    }
+
+    // TODO
+
+    Ok(())
+}
+
+fn check_ept_violation_exception_info() -> Result<(), &'static str> {
+    let secondary_exec_ctrl = SecondaryProcessorBasedVmExecutionControls::read()?;
+
+    if secondary_exec_ctrl.ept_violation() {
+        let exception_info = vmread(vmcs::control::VIRT_EXCEPTION_INFO_ADDR_FULL)?;
+
+        if is_valid_page_aligned_phys_addr(exception_info) {
+            return Err("VMCS Ept violation exception info address is not a valid page-aligned physical address");
+        }
+    }
+
+    Ok(())
+}
+
+fn check_vmcs_shadowing() -> Result<(), &'static str> {
+    let secondary_exec_ctrl = SecondaryProcessorBasedVmExecutionControls::read()?;
+
+    if !secondary_exec_ctrl.vmcs_shadowing() {
+        return Ok(());
+    }
+
+    let vmcs_vmread_bitmap = vmread(vmcs::control::VMREAD_BITMAP_ADDR_FULL)?;
+    let vmcs_vmwrite_bitmap = vmread(vmcs::control::VMWRITE_BITMAP_ADDR_FULL)?;
+
+    if !is_valid_page_aligned_phys_addr(vmcs_vmread_bitmap) {
+        return Err("VMCS VMREAD bitmap address is not a valid page-aligned physical address");
+    }
+
+    if !is_valid_page_aligned_phys_addr(vmcs_vmwrite_bitmap) {
+        return Err("VMCS VMWRITE bitmap address is not a valid page-aligned physical address");
+    }
+
+    Ok(())
+}
+
+fn check_nmi() -> Result<(), &'static str> {
+    let pin_ctrl = PinBasedVmExecutionControls::read()?;
+
+    if !pin_ctrl.nmi_exiting() && pin_ctrl.virtual_nmi() {
+        return Err(
+            "VMCS Pin-based execution controls field: NMI exiting and virtual NMI are both set",
+        );
+    }
+
+    let exec_ctrl = PrimaryProcessorBasedVmExecutionControls::read()?;
+
+    if !pin_ctrl.virtual_nmi() && exec_ctrl.nmi_window() {
+        return Err(
+            "VMCS Pin-based execution controls field: Interrupt-window exiting and virtual NMI are both not set",
+        );
+    }
+
+    Ok(())
+}
+
+fn is_valid_phys_addr(addr: u64) -> bool {
+    (addr & !((1 << 40) - 1)) == 0
+}
+
 fn is_valid_page_aligned_phys_addr(addr: u64) -> bool {
    (addr & (!((1 << 40) - 1) | 0xfff)) == 0
 }
@@ -39,6 +194,16 @@ fn check_cr3_target() -> Result<(), &'static str> {
    Ok(())
 }

+fn check_msr_bitmap() -> Result<(), &'static str> {
+    let vmcs_msr_bitmap = vmread(vmcs::control::MSR_BITMAPS_ADDR_FULL)?;
+
+    if !is_valid_page_aligned_phys_addr(vmcs_msr_bitmap) {
+        return Err("VMCS MSR bitmap address is not a valid page-aligned physical address");
+    }
+
+    Ok(())
+}
+
 fn check_io_bitmap() -> Result<(), &'static str> {
    let vmcs_io_bitmap_a = vmread(vmcs::control::IO_BITMAP_A_ADDR_FULL)?;
    let vmcs_io_bitmap_b = vmread(vmcs::control::IO_BITMAP_B_ADDR_FULL)?;
--- a/nel_os_kernel/src/vmm/x86_64/intel/controls.rs
+++ b/nel_os_kernel/src/vmm/x86_64/intel/controls.rs
@@ -1,4 +1,7 @@
-use crate::vmm::x86_64::{common, intel::vmcs};
+use crate::vmm::x86_64::{
+    common,
+    intel::{vmcs, vmwrite},
+};

 pub fn setup_exec_controls() -> Result<(), &'static str> {
    let basic_msr = common::read_msr(0x480);
@@ -12,8 +15,8 @@ pub fn setup_exec_controls() -> Result<(), &'static str> {
    raw_pin_exec_ctrl |= (reserved_bits & 0xFFFFFFFF) as u32;
    raw_pin_exec_ctrl &= (reserved_bits >> 32) as u32;

-    let pin_exec_ctrl = vmcs::controls::PinBasedVmExecutionControls::from(raw_pin_exec_ctrl);
-    //pin_exec_ctrl.set_external_interrupt_exiting(false);
+    let mut pin_exec_ctrl = vmcs::controls::PinBasedVmExecutionControls::from(raw_pin_exec_ctrl);
+    pin_exec_ctrl.set_external_interrupt_exiting(true);

    pin_exec_ctrl.write()?;

@@ -33,6 +36,8 @@ pub fn setup_exec_controls() -> Result<(), &'static str> {
    primary_exec_ctrl.set_hlt(true);
    primary_exec_ctrl.set_activate_secondary_controls(true);
    primary_exec_ctrl.set_use_msr_bitmap(false);
+    primary_exec_ctrl.set_unconditional_io(false);
+    primary_exec_ctrl.set_use_io_bitmap(true);

    primary_exec_ctrl.write()?;

@@ -55,6 +60,9 @@ pub fn setup_exec_controls() -> Result<(), &'static str> {

    secondary_exec_ctrl.write()?;

+    vmwrite(x86::vmx::vmcs::control::CR0_GUEST_HOST_MASK, u64::MAX)?;
+    vmwrite(x86::vmx::vmcs::control::CR4_GUEST_HOST_MASK, u64::MAX)?;
+
    Ok(())
 }

@@ -101,7 +109,7 @@ pub fn setup_exit_controls() -> Result<(), &'static str> {

    exit_ctrl.write()?;

-    //vmwrite(0x4004, 1u64 << 6)?; // EXCEPTION_BITMAP
+    vmwrite(0x4004, 1u64 << x86::irq::INVALID_OPCODE_VECTOR)?;

    Ok(())
 }
--- a/nel_os_kernel/src/vmm/x86_64/intel/cpuid.rs
+++ b/nel_os_kernel/src/vmm/x86_64/intel/cpuid.rs
@@ -258,6 +258,7 @@ pub struct ExtFeatureEbx0 {
    pub avx512vl: bool,
 }

+#[allow(clippy::enum_clike_unportable_variant)]
 pub enum VmxLeaf {
    MAXIMUM_INPUT = 0x0,
    VERSION_AND_FEATURE_INFO = 0x1,
@@ -268,7 +269,7 @@ pub enum VmxLeaf {
    EXTENDED_FEATURE_2 = 0x80000002,
    EXTENDED_FEATURE_3 = 0x80000003,
    EXTENDED_FEATURE_4 = 0x80000004,
-    UNKNOWN = 0xFFFFFFFF,
+    Unknown = 0xFFFFFFFF,
 }

 impl VmxLeaf {
@@ -283,7 +284,7 @@ impl VmxLeaf {
            0x80000002 => VmxLeaf::EXTENDED_FEATURE_2,
            0x80000003 => VmxLeaf::EXTENDED_FEATURE_3,
            0x80000004 => VmxLeaf::EXTENDED_FEATURE_4,
-            _ => VmxLeaf::UNKNOWN,
+            _ => VmxLeaf::Unknown,
        }
    }
 }
--- a/nel_os_kernel/src/vmm/x86_64/intel/cr.rs
+++ b/nel_os_kernel/src/vmm/x86_64/intel/cr.rs
@@ -0,0 +1,166 @@
+use x86::vmx::vmcs;
+
+use crate::vmm::x86_64::{
+    common::read_msr,
+    intel::{
+        qual::{AccessType, QualCr, Register},
+        vcpu::IntelVCpu,
+        vmread, vmwrite,
+    },
+};
+
+pub fn handle_cr_access(vcpu: &mut IntelVCpu, qual: &QualCr) -> Result<(), &'static str> {
+    match qual.access_type() {
+        AccessType::MovTo => match qual.index() {
+            0 | 4 => {
+                passthrough_write(vcpu, qual)?;
+                update_ia32e(vcpu)?;
+            }
+            _ => panic!("Unsupported CR index: {}", qual.index()),
+        },
+        AccessType::MovFrom => passthrough_read(vcpu, qual)?,
+        _ => {
+            panic!("Unsupported CR access type: {:?}", qual.access_type());
+        }
+    }
+
+    Ok(())
+}
+
+fn passthrough_read(vcpu: &mut IntelVCpu, qual: &QualCr) -> Result<(), &'static str> {
+    let value = match qual.index() {
+        3 => vmread(x86::vmx::vmcs::guest::CR3)?,
+        _ => panic!("Unsupported CR index: {}", qual.index()),
+    };
+
+    set_value(vcpu, qual, value)?;
+
+    Ok(())
+}
+
+fn passthrough_write(vcpu: &mut IntelVCpu, qual: &QualCr) -> Result<(), &'static str> {
+    let value = get_value(vcpu, qual)?;
+    match qual.index() {
+        0 => {
+            vmwrite(vmcs::guest::CR0, adjust_cr0(value))?;
+            vmwrite(vmcs::control::CR0_READ_SHADOW, value)?;
+        }
+        4 => {
+            vmwrite(vmcs::guest::CR4, adjust_cr4(value))?;
+            vmwrite(vmcs::control::CR4_READ_SHADOW, value)?;
+        }
+        _ => {
+            panic!("Unsupported CR index: {}", qual.index());
+        }
+    }
+
+    Ok(())
+}
+
+pub fn update_ia32e(vcpu: &mut IntelVCpu) -> Result<(), &'static str> {
+    let cr0 = vmread(x86::vmx::vmcs::guest::CR0)?;
+    let cr4 = vmread(x86::vmx::vmcs::guest::CR4)?;
+    let ia32e_enabled = (cr0 & 1 << 31) != 0 && (cr4 & 1 << 5) != 0;
+
+    vcpu.ia32e_enabled = ia32e_enabled;
+
+    let mut entry_ctrl = super::vmcs::controls::EntryControls::read()?;
+    entry_ctrl.set_ia32e_mode_guest(ia32e_enabled);
+    entry_ctrl.write()?;
+
+    let mut efer = vmread(x86::vmx::vmcs::guest::IA32_EFER_FULL)?;
+
+    let lma = (vcpu.ia32e_enabled as u64) << 10;
+    if lma != 0 {
+        efer |= lma;
+    } else {
+        efer &= !lma;
+    }
+
+    let lme = if cr0 & (1 << 31) != 0 {
+        efer & (1 << 10)
+    } else {
+        efer & !(1 << 8)
+    };
+    if lme != 0 {
+        efer |= lme;
+    } else {
+        efer &= lme;
+    }
+
+    vmwrite(x86::vmx::vmcs::guest::IA32_EFER_FULL, efer)?;
+
+    Ok(())
+}
+
+pub fn adjust_cr0(value: u64) -> u64 {
+    let mut result = value;
+
+    let cr0_fixed0 = read_msr(x86::msr::IA32_VMX_CR0_FIXED0);
+    let cr0_fixed1 = read_msr(x86::msr::IA32_VMX_CR0_FIXED1);
+
+    result |= cr0_fixed0;
+    result &= cr0_fixed1;
+
+    result
+}
+
+pub fn adjust_cr4(value: u64) -> u64 {
+    let mut result = value;
+
+    let cr4_fixed0 = read_msr(x86::msr::IA32_VMX_CR4_FIXED0);
+    let cr4_fixed1 = read_msr(x86::msr::IA32_VMX_CR4_FIXED1);
+
+    result |= cr4_fixed0;
+    result &= cr4_fixed1;
+
+    result
+}
+
+fn set_value(vcpu: &mut IntelVCpu, qual: &QualCr, value: u64) -> Result<(), &'static str> {
+    let guest_regs = &mut vcpu.guest_registers;
+
+    match qual.register() {
+        Register::Rax => guest_regs.rax = value,
+        Register::Rcx => guest_regs.rcx = value,
+        Register::Rdx => guest_regs.rdx = value,
+        Register::Rbx => guest_regs.rbx = value,
+        Register::Rbp => guest_regs.rbp = value,
+        Register::Rsi => guest_regs.rsi = value,
+        Register::Rdi => guest_regs.rdi = value,
+        Register::R8 => guest_regs.r8 = value,
+        Register::R9 => guest_regs.r9 = value,
+        Register::R10 => guest_regs.r10 = value,
+        Register::R11 => guest_regs.r11 = value,
+        Register::R12 => guest_regs.r12 = value,
+        Register::R13 => guest_regs.r13 = value,
+        Register::R14 => guest_regs.r14 = value,
+        Register::R15 => guest_regs.r15 = value,
+        Register::Rsp => vmwrite(x86::vmx::vmcs::guest::RSP, value)?,
+    }
+
+    Ok(())
+}
+
+fn get_value(vcpu: &mut IntelVCpu, qual: &QualCr) -> Result<u64, &'static str> {
+    let guest_regs = &mut vcpu.guest_registers;
+
+    Ok(match qual.register() {
+        Register::Rax => guest_regs.rax,
+        Register::Rcx => guest_regs.rcx,
+        Register::Rdx => guest_regs.rdx,
+        Register::Rbx => guest_regs.rbx,
+        Register::Rbp => guest_regs.rbp,
+        Register::Rsi => guest_regs.rsi,
+        Register::Rdi => guest_regs.rdi,
+        Register::R8 => guest_regs.r8,
+        Register::R9 => guest_regs.r9,
+        Register::R10 => guest_regs.r10,
+        Register::R11 => guest_regs.r11,
+        Register::R12 => guest_regs.r12,
+        Register::R13 => guest_regs.r13,
+        Register::R14 => guest_regs.r14,
+        Register::R15 => guest_regs.r15,
+        Register::Rsp => vmread(x86::vmx::vmcs::guest::RSP)?,
+    })
+}
--- a/nel_os_kernel/src/vmm/x86_64/intel/ept.rs
+++ b/nel_os_kernel/src/vmm/x86_64/intel/ept.rs
@@ -9,15 +9,15 @@ use x86_64::{
    PhysAddr,
 };

-pub struct EPT {
+pub struct Ept {
    pub root_table: PhysFrame,
 }

-impl EPT {
+impl Ept {
    pub fn new(allocator: &mut impl FrameAllocator<Size4KiB>) -> Result<Self, &'static str> {
        let root_table_frame = allocator
            .allocate_frame()
-            .ok_or("Failed to allocate EPT root table frame")?;
+            .ok_or("Failed to allocate Ept root table frame")?;

        Self::init_table(&root_table_frame);

@@ -289,7 +289,7 @@ impl EPT {
 #[bitfield]
 #[repr(u64)]
 #[derive(Debug)]
-pub struct EPTP {
+pub struct Eptp {
    pub typ: B3,
    pub level: B3,
    pub dirty_accessed: bool,
@@ -298,9 +298,9 @@ pub struct EPTP {
    pub phys: B52,
 }

-impl EPTP {
+impl Eptp {
    pub fn init(lv4_table: &PhysFrame) -> Self {
-        EPTP::new()
+        Eptp::new()
            .with_typ(6)
            .with_level(3)
            .with_dirty_accessed(true)
@@ -308,7 +308,7 @@ impl EPTP {
            .with_phys(lv4_table.start_address().as_u64() >> 12)
    }

-    pub fn get_lv4_table(&self) -> &mut [EntryBase; 512] {
+    pub fn get_lv4_table(&mut self) -> &mut [EntryBase; 512] {
        let table_ptr = self.phys() << 12;

        unsafe { &mut *(table_ptr as *mut [EntryBase; 512]) }
--- a/nel_os_kernel/src/vmm/x86_64/intel/fpu.rs
+++ b/nel_os_kernel/src/vmm/x86_64/intel/fpu.rs
@@ -0,0 +1,68 @@
+#![allow(non_snake_case)]
+
+use modular_bitfield::{bitfield, prelude::B44};
+
+use crate::vmm::x86_64::intel::vcpu::IntelVCpu;
+
+#[bitfield]
+#[repr(u64)]
+#[derive(Debug, Clone, Copy)]
+pub struct XCR0 {
+    pub x87: bool,
+    pub sse: bool,
+    pub avx: bool,
+    pub bndreg: bool,
+    pub bndcsr: bool,
+    pub opmask: bool,
+    pub zmm_hi256: bool,
+    pub hi16_zmm: bool,
+    pub pt: bool,
+    pub pkru: bool,
+    pub pasid: bool,
+    pub cet_u: bool,
+    pub cet_s: bool,
+    pub hdc: bool,
+    pub intr: bool,
+    pub lbr: bool,
+    pub hwp: bool,
+    pub xtilecfg: bool,
+    pub xtiledata: bool,
+    pub apx: bool,
+    _reserved: B44,
+}
+
+pub fn set_xcr(vcpu: &mut IntelVCpu, index: u32, xcr: u64) -> Result<(), &'static str> {
+    if index != 0 {
+        return Err("Invalid XCR index");
+    }
+
+    if xcr & 0b1 == 0 {
+        return Err("X87 is not enabled");
+    }
+
+    if (xcr & 0b100 != 0) && (xcr & 0b10 == 0) {
+        return Err("SSE is not enabled");
+    }
+
+    if !(xcr & 0b1000) != (!(xcr & 0b10000)) {
+        return Err("BNDREGS and BNDCSR are not both enabled");
+    }
+
+    if xcr & 0b11100000 != 0 {
+        if xcr & 0b100 == 0 {
+            return Err("YMM bits are not enabled");
+        }
+
+        if (xcr & 0b11100000) != 0b11100000 {
+            return Err("Invalid bits set in XCR0");
+        }
+    }
+
+    if (xcr & 0b1000000000000 != 0) && (xcr & 0b1000000000000 != 0b1000000000000) {
+        return Err("xtile bits are not both enabled");
+    }
+
+    vcpu.guest_xcr0 = XCR0::from(xcr);
+
+    Ok(())
+}
--- a/nel_os_kernel/src/vmm/x86_64/intel/io.rs
+++ b/nel_os_kernel/src/vmm/x86_64/intel/io.rs
@@ -0,0 +1,421 @@
+use x86::{
+    io::inb,
+    vmx::{self, vmcs},
+};
+use x86_64::structures::paging::{FrameAllocator, PhysFrame, Size4KiB};
+
+use super::qual::QualIo;
+use crate::{
+    info,
+    interrupt::subscriber::InterruptContext,
+    serial,
+    vmm::x86_64::intel::{
+        register::GuestRegisters, vmcs::controls::EntryIntrInfo, vmread, vmwrite,
+    },
+};
+
+pub fn vmm_interrupt_subscriber(vcpu_ptr: *mut core::ffi::c_void, context: &InterruptContext) {
+    if vcpu_ptr.is_null() {
+        return;
+    }
+
+    let vcpu = unsafe { &mut *(vcpu_ptr as *mut super::vcpu::IntelVCpu) };
+
+    if 0x20 <= context.vector && context.vector <= 0x20 + 16 {
+        let irq = context.vector - 0x20;
+        vcpu.pic.pending_irq |= 1 << irq;
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum InitPhase {
+    Uninitialized,
+    Phase1,
+    Phase2,
+    Phase3,
+    Initialized,
+}
+
+pub enum ReadSel {
+    Irr,
+    Isr,
+}
+
+#[derive(Debug, Clone, Copy, Default)]
+pub struct Serial {
+    pub ier: u8,
+    pub mcr: u8,
+}
+
+pub struct Pic {
+    pub primary_mask: u8,
+    pub secondary_mask: u8,
+    pub primary_phase: InitPhase,
+    pub secondary_phase: InitPhase,
+    pub primary_base: u8,
+    pub secondary_base: u8,
+    pub primary_irr: u8,
+    pub primary_isr: u8,
+    pub secondary_irr: u8,
+    pub secondary_isr: u8,
+    pub primary_read_sel: ReadSel,
+    pub secondary_read_sel: ReadSel,
+    pub serial: Serial,
+    pub pending_irq: u16,
+}
+
+impl Pic {
+    pub fn new() -> Self {
+        Self {
+            primary_mask: 0xFF,
+            secondary_mask: 0xFF,
+            primary_phase: InitPhase::Uninitialized,
+            secondary_phase: InitPhase::Uninitialized,
+            primary_base: 0,
+            secondary_base: 0,
+            primary_irr: 0,
+            primary_isr: 0,
+            secondary_irr: 0,
+            secondary_isr: 0,
+            primary_read_sel: ReadSel::Irr,
+            secondary_read_sel: ReadSel::Irr,
+            serial: Serial::default(),
+            pending_irq: 0,
+        }
+    }
+
+    pub fn handle_io(&mut self, regs: &mut GuestRegisters, qual: QualIo) {
+        match qual.direction() {
+            0 => {
+                self.handle_io_out(regs, qual);
+            }
+            1 => {
+                self.handle_io_in(regs, qual);
+            }
+            _ => {}
+        }
+    }
+
+    pub fn inject_external_interrupt(&mut self) -> Result<bool, &'static str> {
+        let pending = self.pending_irq;
+
+        if pending == 0 {
+            return Ok(false);
+        }
+
+        if self.primary_phase != InitPhase::Initialized {
+            return Ok(false);
+        }
+
+        let eflags = vmread(vmx::vmcs::guest::RFLAGS)?;
+        if eflags >> 9 & 1 == 0 {
+            return Ok(false);
+        }
+
+        let interruptibility = vmread(vmx::vmcs::guest::INTERRUPTIBILITY_STATE)?;
+        if interruptibility & 0x3 != 0 {
+            return Ok(false);
+        }
+
+        let is_secondary_masked = (self.primary_mask >> 2) & 1 != 0;
+
+        for i in 0..16 {
+            if is_secondary_masked && i >= 8 {
+                continue;
+            }
+
+            let irq_bit = 1 << i;
+            if pending & irq_bit == 0 {
+                continue;
+            }
+
+            let delta = if i < 8 { i } else { i - 8 };
+            let is_masked = if i < 8 {
+                (self.primary_mask >> delta) & 1 != 0
+            } else {
+                let is_irq_masked = (self.secondary_mask >> delta) & 1 != 0;
+                is_secondary_masked || is_irq_masked
+            };
+
+            if is_masked {
+                continue;
+            }
+
+            let interrupt_info = EntryIntrInfo::new()
+                .with_vector(
+                    delta as u8
+                        + if i < 8 {
+                            self.primary_base
+                        } else {
+                            self.secondary_base
+                        },
+                )
+                .with_typ(0)
+                .with_ec_available(false)
+                .with_valid(true);
+
+            vmwrite(
+                vmx::vmcs::control::VMENTRY_INTERRUPTION_INFO_FIELD,
+                u32::from(interrupt_info) as u64,
+            )?;
+
+            self.pending_irq &= !irq_bit;
+            return Ok(true);
+        }
+
+        Ok(false)
+    }
+
+    pub fn inject_exception(
+        &mut self,
+        vector: u32,
+        error_code: Option<u32>,
+    ) -> Result<(), &'static str> {
+        let has_error_code = matches!(vector, 8 | 10..=14 | 17 | 21);
+
+        let interrupt_info = EntryIntrInfo::new()
+            .with_vector(vector as u8)
+            .with_typ(3)
+            .with_ec_available(has_error_code)
+            .with_valid(true);
+
+        vmwrite(
+            vmx::vmcs::control::VMENTRY_INTERRUPTION_INFO_FIELD,
+            u32::from(interrupt_info) as u64,
+        )?;
+
+        if has_error_code {
+            let ec = error_code.unwrap_or(0);
+            vmwrite(vmx::vmcs::control::VMENTRY_EXCEPTION_ERR_CODE, ec as u64)?;
+        }
+
+        Ok(())
+    }
+
+    fn handle_io_in(&self, regs: &mut GuestRegisters, qual: QualIo) {
+        match qual.port() {
+            0x0CF8..=0x0CFF => regs.rax = 0,
+            0xC000..=0xCFFF => {} //ignore
+            0x20..=0x21 => self.handle_pic_in(regs, qual),
+            0xA0..=0xA1 => self.handle_pic_in(regs, qual),
+            0x0070..=0x0071 => regs.rax = 0,
+            0x03F8..=0x03FF => self.handle_serial_in(regs, qual),
+            _ => regs.rax = 0,
+        }
+    }
+
+    fn handle_io_out(&mut self, regs: &mut GuestRegisters, qual: QualIo) {
+        match qual.port() {
+            0x0CF8..=0x0CFF => {} //ignore
+            0xC000..=0xCFFF => {} //ignore
+            0x20..=0x21 => self.handle_pic_out(regs, qual),
+            0xA0..=0xA1 => self.handle_pic_out(regs, qual),
+            0x03F8..=0x03FF => self.handle_serial_out(regs, qual),
+            0x0070..=0x0071 => {} //ignore
+            _ => {}
+        }
+    }
+
+    fn handle_serial_in(&self, regs: &mut GuestRegisters, qual: QualIo) {
+        match qual.port() {
+            0x3F8 => regs.rax = unsafe { inb(qual.port()).into() },
+            0x3F9 => regs.rax = self.serial.ier as u64,
+            0x3FA => {} //regs.rax = 0, //  unsafe { inb(qual.port()).into() },
+            0x3FB => {} //regs.rax = 0,
+            0x3FC => {} //regs.rax = 0, //self.serial.mcr as u64,
+            0x3FD => {
+                if qual.size() == 1 {
+                    regs.rax = 0x60
+                }
+            }
+            0x3FE => {
+                if qual.size() == 1 {
+                    regs.rax = 0xb0
+                }
+            }
+            0x3FF => {} //regs.rax = 0,
+            _ => {
+                panic!("Serial in: invalid port: {:#x}", qual.port());
+            }
+        }
+    }
+
+    fn handle_serial_out(&mut self, regs: &mut GuestRegisters, qual: QualIo) {
+        match qual.port() {
+            0x3F8 => serial::write_byte(regs.rax as u8),
+            0x3F9 => {
+                self.serial.ier = regs.rax as u8;
+                if regs.rax & 0b10 != 0 {
+                    self.pending_irq |= 1 << 4;
+                }
+            }
+            0x3FA => {}
+            0x3FB => {}
+            0x3FC => self.serial.mcr = regs.rax as u8,
+            0x3FD => {}
+            0x3FF => {}
+            _ => {
+                panic!("Serial out: invalid port: {:#x}", qual.port());
+            }
+        }
+    }
+
+    fn handle_pic_in(&self, regs: &mut GuestRegisters, qual: QualIo) {
+        match qual.port() {
+            0x20 => {
+                let v = match self.primary_read_sel {
+                    ReadSel::Irr => self.primary_irr,
+                    ReadSel::Isr => self.primary_isr,
+                };
+                regs.rax = v as u64;
+            }
+            0xA0 => {
+                let v = match self.secondary_read_sel {
+                    ReadSel::Irr => self.secondary_irr,
+                    ReadSel::Isr => self.secondary_isr,
+                };
+                regs.rax = v as u64;
+            }
+            0x21 => match self.primary_phase {
+                InitPhase::Uninitialized | InitPhase::Initialized => {
+                    regs.rax = self.primary_mask as u64;
+                }
+                _ => {}
+            },
+            0xA1 => match self.secondary_phase {
+                InitPhase::Uninitialized | InitPhase::Initialized => {
+                    regs.rax = self.secondary_mask as u64;
+                }
+                _ => {}
+            },
+            _ => {}
+        }
+    }
+
+    fn handle_pic_out(&mut self, regs: &mut GuestRegisters, qual: QualIo) {
+        let pic = self;
+        let dx = regs.rax as u8;
+        match qual.port() {
+            0x20 => match dx {
+                0x11 => pic.primary_phase = InitPhase::Phase1,
+                0x0A => pic.primary_read_sel = ReadSel::Isr,
+                0x0B => pic.primary_read_sel = ReadSel::Irr,
+                0x20 => {
+                    pic.primary_isr = 0;
+                }
+                0x60..=0x67 => {
+                    let irq = dx & 0x7;
+                    pic.primary_isr &= !(1 << irq);
+                }
+                _ => panic!("Primary Pic command: {:#x}", dx),
+            },
+            0x21 => match pic.primary_phase {
+                InitPhase::Uninitialized | InitPhase::Initialized => pic.primary_mask = dx,
+                InitPhase::Phase1 => {
+                    pic.primary_base = dx;
+                    pic.primary_phase = InitPhase::Phase2;
+                }
+                InitPhase::Phase2 => {
+                    pic.primary_phase = InitPhase::Phase3;
+                }
+                InitPhase::Phase3 => {
+                    info!("Primary Pic Initialized");
+                    pic.primary_phase = InitPhase::Initialized
+                }
+            },
+            0xA0 => match dx {
+                0x11 => pic.secondary_phase = InitPhase::Phase1,
+                0x0A => pic.secondary_read_sel = ReadSel::Isr,
+                0x0B => pic.secondary_read_sel = ReadSel::Irr,
+                0x20 => {
+                    pic.secondary_isr = 0;
+                }
+                0x60..=0x67 => {
+                    let irq = dx & 0x7;
+                    pic.secondary_isr &= !(1 << irq);
+                }
+                _ => panic!("Secondary Pic command: {:#x}", dx),
+            },
+            0xA1 => match pic.secondary_phase {
+                InitPhase::Uninitialized | InitPhase::Initialized => pic.secondary_mask = dx,
+                InitPhase::Phase1 => {
+                    pic.secondary_base = dx;
+                    pic.secondary_phase = InitPhase::Phase2;
+                }
+                InitPhase::Phase2 => {
+                    pic.secondary_phase = InitPhase::Phase3;
+                }
+                InitPhase::Phase3 => {
+                    info!("Secondary Pic Initialized");
+                    pic.secondary_phase = InitPhase::Initialized
+                }
+            },
+            _ => {}
+        }
+    }
+}
+
+pub struct IOBitmap {
+    pub bitmap_a: PhysFrame,
+    pub bitmap_b: PhysFrame,
+}
+
+impl IOBitmap {
+    pub fn new(frame_allocator: &mut impl FrameAllocator<Size4KiB>) -> Self {
+        let bitmap_a = frame_allocator
+            .allocate_frame()
+            .expect("Failed to allocate I/O bitmap A");
+        let bitmap_b = frame_allocator
+            .allocate_frame()
+            .expect("Failed to allocate I/O bitmap B");
+
+        Self { bitmap_a, bitmap_b }
+    }
+
+    pub fn setup(&mut self) -> Result<(), &'static str> {
+        let bitmap_a_addr = self.bitmap_a.start_address().as_u64() as usize;
+        let bitmap_b_addr = self.bitmap_b.start_address().as_u64() as usize;
+
+        unsafe {
+            core::ptr::write_bytes(bitmap_a_addr as *mut u8, u8::MAX, 4096);
+            core::ptr::write_bytes(bitmap_b_addr as *mut u8, u8::MAX, 4096);
+        }
+
+        self.set_io_ports(0x0040..=0x0047);
+        //self.set_io_ports(0x02F8..=0x03EF);
+
+        vmwrite(vmcs::control::IO_BITMAP_A_ADDR_FULL, bitmap_a_addr as u64)?;
+        vmwrite(vmcs::control::IO_BITMAP_B_ADDR_FULL, bitmap_b_addr as u64)?;
+
+        Ok(())
+    }
+
+    pub fn set_io_ports(&mut self, ports: core::ops::RangeInclusive<u16>) {
+        for port in ports {
+            if port <= 0x7FFF {
+                let byte_index = port as usize / 8;
+                let bit_index = port as usize % 8;
+
+                self.get_bitmap_a()[byte_index] &= !(1 << bit_index);
+            } else {
+                let adjusted_port = port - 0x8000;
+                let byte_index = adjusted_port as usize / 8;
+                let bit_index = adjusted_port as usize % 8;
+
+                self.get_bitmap_b()[byte_index] &= !(1 << bit_index);
+            }
+        }
+    }
+
+    fn get_bitmap_a(&mut self) -> &mut [u8] {
+        unsafe {
+            core::slice::from_raw_parts_mut(self.bitmap_a.start_address().as_u64() as *mut u8, 4096)
+        }
+    }
+
+    fn get_bitmap_b(&mut self) -> &mut [u8] {
+        unsafe {
+            core::slice::from_raw_parts_mut(self.bitmap_b.start_address().as_u64() as *mut u8, 4096)
+        }
+    }
+}
--- a/nel_os_kernel/src/vmm/x86_64/intel/mod.rs
+++ b/nel_os_kernel/src/vmm/x86_64/intel/mod.rs
@@ -2,8 +2,12 @@ pub mod asm;
 mod auditor;
 mod controls;
 mod cpuid;
+mod cr;
 mod ept;
+mod fpu;
+mod io;
 mod msr;
+mod qual;
 mod register;
 pub mod vcpu;
 mod vmcs;
--- a/nel_os_kernel/src/vmm/x86_64/intel/msr.rs
+++ b/nel_os_kernel/src/vmm/x86_64/intel/msr.rs
@@ -12,7 +12,7 @@ type MsrIndex = u32;

 const MAX_NUM_ENTS: usize = 512;

-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, Default)]
 #[repr(C, packed)]
 pub struct SavedMsr {
    pub index: MsrIndex,
@@ -20,16 +20,6 @@ pub struct SavedMsr {
    pub data: u64,
 }

-impl Default for SavedMsr {
-    fn default() -> Self {
-        Self {
-            index: 0,
-            reserved: 0,
-            data: 0,
-        }
-    }
-}
-
 #[derive(Debug)]
 pub struct ShadowMsr {
    ents: Vec<SavedMsr>,
@@ -92,7 +82,7 @@ pub fn register_msrs(vcpu: &mut IntelVCpu) -> Result<(), MsrError> {
    Ok(())
 }

-pub fn update_msrs(vcpu: &mut IntelVCpu) -> Result<(), MsrError> {
+pub fn _update_msrs(vcpu: &mut IntelVCpu) -> Result<(), MsrError> {
    info!("updating MSRs");
    let indices_to_update: alloc::vec::Vec<u32> = vcpu
        .host_msr
@@ -101,8 +91,6 @@ pub fn update_msrs(vcpu: &mut IntelVCpu) -> Result<(), MsrError> {
        .map(|entry| entry.index)
        .collect();

-    info!("1");
-
    for index in indices_to_update {
        info!("{}", index);
        let value = read_msr(index);
@@ -110,28 +98,30 @@ pub fn update_msrs(vcpu: &mut IntelVCpu) -> Result<(), MsrError> {
        vcpu.host_msr.set_by_index(index, value).unwrap();
    }

-    info!("2");
    vmwrite(
        vmcs::control::VMEXIT_MSR_LOAD_COUNT,
        vcpu.host_msr.saved_ents().len() as u64,
    )
    .unwrap();
-    info!("3");
    vmwrite(
        vmcs::control::VMEXIT_MSR_STORE_COUNT,
        vcpu.guest_msr.saved_ents().len() as u64,
    )
    .unwrap();
-    info!("4");
    vmwrite(
        vmcs::control::VMENTRY_MSR_LOAD_COUNT,
        vcpu.guest_msr.saved_ents().len() as u64,
    )
    .unwrap();
-    info!("5");
    Ok(())
 }

+impl Default for ShadowMsr {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl ShadowMsr {
    pub fn new() -> Self {
        let ents = vec![];
--- a/nel_os_kernel/src/vmm/x86_64/intel/qual.rs
+++ b/nel_os_kernel/src/vmm/x86_64/intel/qual.rs
@@ -0,0 +1,124 @@
+#![allow(non_snake_case)]
+
+use core::convert::TryFrom;
+use core::fmt::Debug;
+
+use modular_bitfield::prelude::{B1, B16, B3, B32, B4, B9};
+use modular_bitfield::{bitfield, Specifier};
+
+#[repr(u8)]
+#[derive(Specifier, Debug, Clone, Copy, PartialEq, Eq)]
+pub enum AccessType {
+    MovTo = 0,
+    MovFrom = 1,
+    Clts = 2,
+    Lmsw = 3,
+}
+
+impl TryFrom<u8> for AccessType {
+    type Error = &'static str;
+    fn try_from(value: u8) -> Result<Self, Self::Error> {
+        match value {
+            0 => Ok(AccessType::MovTo),
+            1 => Ok(AccessType::MovFrom),
+            2 => Ok(AccessType::Clts),
+            3 => Ok(AccessType::Lmsw),
+            _ => Err("Invalid AccessType value"),
+        }
+    }
+}
+
+#[repr(u8)]
+#[derive(Specifier, Debug, Clone, Copy, PartialEq, Eq)]
+pub enum LmswOperandType {
+    Reg = 0,
+    Mem = 1,
+}
+
+impl TryFrom<u8> for LmswOperandType {
+    type Error = &'static str;
+    fn try_from(value: u8) -> Result<Self, Self::Error> {
+        match value {
+            0 => Ok(LmswOperandType::Reg),
+            1 => Ok(LmswOperandType::Mem),
+            _ => Err("Invalid LmswOperandType value"),
+        }
+    }
+}
+
+#[repr(u8)]
+#[derive(Specifier, Debug, Clone, Copy, PartialEq, Eq)]
+pub enum Register {
+    Rax = 0,
+    Rcx = 1,
+    Rdx = 2,
+    Rbx = 3,
+    Rsp = 4,
+    Rbp = 5,
+    Rsi = 6,
+    Rdi = 7,
+    R8 = 8,
+    R9 = 9,
+    R10 = 10,
+    R11 = 11,
+    R12 = 12,
+    R13 = 13,
+    R14 = 14,
+    R15 = 15,
+}
+
+impl TryFrom<u8> for Register {
+    type Error = &'static str;
+    fn try_from(value: u8) -> Result<Self, Self::Error> {
+        match value {
+            0 => Ok(Register::Rax),
+            1 => Ok(Register::Rcx),
+            2 => Ok(Register::Rdx),
+            3 => Ok(Register::Rbx),
+            4 => Ok(Register::Rsp),
+            5 => Ok(Register::Rbp),
+            6 => Ok(Register::Rsi),
+            7 => Ok(Register::Rdi),
+            8 => Ok(Register::R8),
+            9 => Ok(Register::R9),
+            10 => Ok(Register::R10),
+            11 => Ok(Register::R11),
+            12 => Ok(Register::R12),
+            13 => Ok(Register::R13),
+            14 => Ok(Register::R14),
+            15 => Ok(Register::R15),
+            _ => Err("Invalid Register value"),
+        }
+    }
+}
+
+#[bitfield]
+#[repr(u64)]
+#[derive(Debug, Clone, Copy)]
+pub struct QualCr {
+    pub index: B4,
+    #[bits = 2]
+    pub access_type: AccessType,
+    #[bits = 1]
+    pub lmsw_operand_type: LmswOperandType,
+    _reserved1: B1,
+    #[bits = 4]
+    pub register: Register,
+    _reserved2: B4,
+    pub lmsw_source: B16,
+    _reseved3: B32,
+}
+
+#[bitfield]
+#[repr(u64)]
+#[derive(Debug, Clone, Copy)]
+pub struct QualIo {
+    pub size: B3,
+    pub direction: B1,
+    pub string: B1,
+    pub rep: B1,
+    pub operand_encoding: B1,
+    _reserved1: B9,
+    pub port: B16,
+    _reserved2: B32,
+}
--- a/nel_os_kernel/src/vmm/x86_64/intel/vcpu.rs
+++ b/nel_os_kernel/src/vmm/x86_64/intel/vcpu.rs
@@ -1,18 +1,27 @@
+use core::arch::{
+    asm,
+    x86_64::{_xgetbv, _xsetbv},
+};
+
 use raw_cpuid::cpuid;
+use x86::controlregs::cr4;
 use x86_64::{
-    registers::control::Cr4Flags,
+    registers::control::{Cr4, Cr4Flags},
    structures::paging::{FrameAllocator, Size4KiB},
    VirtAddr,
 };

 use crate::{
-    info,
+    info, interrupt,
    vmm::{
        x86_64::{
            common::{self, read_msr},
            intel::{
                auditor, controls, cpuid, ept,
+                fpu::{self, XCR0},
+                io::{vmm_interrupt_subscriber, IOBitmap},
                msr::{self, ShadowMsr},
+                qual::{QualCr, QualIo},
                register::GuestRegisters,
                vmcs::{
                    self,
@@ -37,11 +46,16 @@ pub struct IntelVCpu {
    activated: bool,
    vmxon: vmxon::Vmxon,
    vmcs: vmcs::Vmcs,
-    ept: ept::EPT,
-    eptp: ept::EPTP,
+    ept: ept::Ept,
+    eptp: ept::Eptp,
    guest_memory_size: u64,
    pub host_msr: ShadowMsr,
    pub guest_msr: ShadowMsr,
+    pub ia32e_enabled: bool,
+    pub pic: super::io::Pic,
+    io_bitmap: IOBitmap,
+    pub host_xcr0: u64,
+    pub guest_xcr0: XCR0,
 }

 impl IntelVCpu {
@@ -72,11 +86,22 @@ impl IntelVCpu {

            match exit_reason {
                VmxExitReason::HLT => {
-                    info!("VM hlt");
+                    let injected = self.pic.inject_external_interrupt().unwrap_or(false);
+
+                    if !injected {
+                        unsafe {
+                            asm!("sti");
+                            asm!("nop");
+                            asm!("cli");
+                        }
+                    }
+
+                    vmwrite(vmcs::guest::ACTIVITY_STATE, 0)?;
+                    vmwrite(vmcs::guest::INTERRUPTIBILITY_STATE, 0)?;
+
                    self.step_next_inst()?;
                }
                VmxExitReason::CPUID => {
-                    info!("VM exit reason: CPUID");
                    cpuid::handle_cpuid_vmexit(self);
                    self.step_next_inst()?;
                }
@@ -88,13 +113,127 @@ impl IntelVCpu {
                    msr::ShadowMsr::handle_wrmsr_vmexit(self);
                    self.step_next_inst()?;
                }
+                VmxExitReason::CONTROL_REGISTER_ACCESSES => {
+                    let qual = vmread(vmcs::ro::EXIT_QUALIFICATION)?;
+                    let qual = QualCr::from(qual);
+
+                    super::cr::handle_cr_access(self, &qual)?;
+
+                    self.step_next_inst()?;
+                }
+                VmxExitReason::XSETBV => {
+                    fpu::set_xcr(
+                        self,
+                        self.guest_registers.rcx as u32,
+                        self.guest_registers.rax,
+                    )?;
+
+                    self.step_next_inst()?;
+                }
+                VmxExitReason::IO_INSTRUCTION => {
+                    let qual = vmread(vmcs::ro::EXIT_QUALIFICATION)?;
+                    let qual_io = QualIo::from(qual);
+
+                    self.pic.handle_io(&mut self.guest_registers, qual_io);
+
+                    self.step_next_inst()?;
+                }
+                VmxExitReason::EXTERNAL_INTERRUPT => {
+                    vmwrite(vmcs::ro::VMEXIT_INTERRUPTION_INFO, 0)?;
+
+                    unsafe {
+                        asm!("sti");
+                        asm!("nop");
+                        asm!("cli");
+                    }
+
+                    self.pic.inject_external_interrupt()?;
+                }
                VmxExitReason::EPT_VIOLATION => {
                    let guest_address = vmread(vmcs::ro::GUEST_PHYSICAL_ADDR_FULL)?;
-                    info!("EPT Violation at guest address: {:#x}", guest_address);
-                    return Err("EPT Violation");
+                    info!("Ept Violation at guest address: {:#x}", guest_address);
+                    return Err("Ept Violation");
+                }
+                VmxExitReason::TRIPLE_FAULT => {
+                    info!("Triple fault detected");
+                    return Err("Triple fault");
+                }
+                VmxExitReason::EXCEPTION => {
+                    let vmexit_intr_info = vmread(vmcs::ro::VMEXIT_INTERRUPTION_INFO).unwrap();
+                    let vector = (vmexit_intr_info & 0xFF) as u32;
+                    let has_error_code = (vmexit_intr_info & (1 << 11)) != 0;
+
+                    let error_code = if has_error_code {
+                        Some(vmread(vmcs::ro::VMEXIT_INTERRUPTION_ERR_CODE).unwrap() as u32)
+                    } else {
+                        None
+                    };
+
+                    let rip = vmread(vmcs::guest::RIP).unwrap();
+
+                    let mut instruction_bytes = [0u8; 16];
+                    let mut valid_bytes = 0;
+
+                    match self.translate_guest_address(rip) {
+                        Ok(guest_phys_addr) => {
+                            for i in 0..16 {
+                                match self.ept.get(guest_phys_addr + i) {
+                                    Ok(byte) => {
+                                        instruction_bytes[i as usize] = byte;
+                                        valid_bytes = i + 1;
+                                    }
+                                    Err(_) => break,
+                                }
+                            }
+                        }
+                        Err(e) => {
+                            info!(
+                                "Failed to get physical address for RIP: {:#x}, {:?}",
+                                rip, e
+                            );
+                            return Err("Failed to get physical address for RIP");
+                        }
+                    }
+
+                    if valid_bytes > 0 {
+                        match instruction_bytes[0] {
+                            0x0F => {
+                                if valid_bytes > 1 {
+                                    match instruction_bytes[1] {
+                                        0x01 => match instruction_bytes[2] {
+                                            0xCA => {
+                                                let rflags = vmread(vmcs::guest::RFLAGS).unwrap();
+                                                vmwrite(vmcs::guest::RFLAGS, rflags & !(1 << 18))
+                                                    .unwrap();
+                                                self.step_next_inst().unwrap();
+                                            }
+                                            0xCB => {
+                                                let rflags = vmread(vmcs::guest::RFLAGS).unwrap();
+                                                vmwrite(vmcs::guest::RFLAGS, rflags | (1 << 18))
+                                                    .unwrap();
+                                                self.step_next_inst().unwrap();
+                                            }
+                                            _ => {
+                                                self.pic
+                                                    .inject_exception(vector, error_code)
+                                                    .unwrap();
+                                            }
+                                        },
+                                        _ => {
+                                            self.pic.inject_exception(vector, error_code).unwrap();
+                                        }
+                                    }
+                                }
+                            }
+                            _ => {
+                                self.pic.inject_exception(vector, error_code).unwrap();
+                            }
+                        }
+                    } else {
+                        self.pic.inject_exception(vector, error_code).unwrap();
+                    }
                }
                _ => {
-                    info!("VM exit reason: {:?}", exit_reason);
                    return Err("Unhandled VM exit reason");
                }
            }
@@ -103,6 +242,50 @@ impl IntelVCpu {
        Ok(())
    }

+    fn load_guest_xcr0(&mut self) -> Result<(), &'static str> {
+        let host_cr4 = unsafe { cr4() };
+        if (host_cr4.bits() & Cr4Flags::OSXSAVE.bits() as usize) == 0 {
+            return Ok(());
+        }
+
+        if self.host_xcr0 == 0 {
+            self.host_xcr0 = unsafe { _xgetbv(0) };
+        }
+
+        let guest_cr4 = vmread(x86::vmx::vmcs::guest::CR4)?;
+
+        if guest_cr4 & Cr4Flags::OSXSAVE.bits() != 0
+            && u64::from(self.guest_xcr0) != self.host_xcr0
+            && u64::from(self.guest_xcr0) != 0
+        {
+            unsafe {
+                _xsetbv(0, u64::from(self.guest_xcr0));
+            }
+        }
+
+        Ok(())
+    }
+
+    fn load_host_xcr0(&mut self) -> Result<(), &'static str> {
+        let host_cr4 = unsafe { cr4() };
+        if (host_cr4.bits() & Cr4Flags::OSXSAVE.bits() as usize) == 0 {
+            return Ok(());
+        }
+
+        let guest_cr4 = vmread(x86::vmx::vmcs::guest::CR4)?;
+
+        if guest_cr4 & Cr4Flags::OSXSAVE.bits() != 0 {
+            let current_xcr0 = unsafe { _xgetbv(0) };
+            if current_xcr0 != self.host_xcr0 {
+                unsafe {
+                    _xsetbv(0, self.host_xcr0);
+                }
+            }
+        }
+
+        Ok(())
+    }
+
    fn step_next_inst(&mut self) -> Result<(), &'static str> {
        use x86::vmx::vmcs;
        let rip = vmread(vmcs::guest::RIP)?;
@@ -114,15 +297,17 @@ impl IntelVCpu {
    }

    fn vmentry(&mut self) -> Result<(), InstructionError> {
-        msr::update_msrs(self).unwrap();
-
        auditor::controls::check_vmcs_control_fields().unwrap();

        let success = {
            let result: u16;
+
+            self.load_guest_xcr0().unwrap();
            unsafe {
                result = crate::vmm::x86_64::intel::asm::asm_vm_entry(self as *mut _);
            };
+            self.load_host_xcr0().unwrap();
+
            result == 0
        };

@@ -152,6 +337,12 @@ impl IntelVCpu {
        controls::setup_exit_controls()?;
        Self::setup_host_state()?;
        self.setup_guest_state()?;
+        self.io_bitmap.setup()?;
+
+        interrupt::subscriber::subscribe(
+            vmm_interrupt_subscriber,
+            self as &mut IntelVCpu as *mut IntelVCpu as *mut core::ffi::c_void,
+        )?;

        self.init_guest_memory(frame_allocator)?;

@@ -159,6 +350,11 @@ impl IntelVCpu {

        msr::register_msrs(self).map_err(|_| "MSR error")?;

+        let cr4 = Cr4::read() | Cr4Flags::OSFXSR;
+        unsafe {
+            Cr4::write(cr4);
+        }
+
        Ok(())
    }

@@ -178,7 +374,7 @@ impl IntelVCpu {
            pages -= 1;
        }

-        let eptp = ept::EPTP::init(&self.ept.root_table);
+        let eptp = ept::Eptp::init(&self.ept.root_table);
        vmwrite(x86::vmx::vmcs::control::EPTP_FULL, u64::from(eptp))?;

        Ok(())
@@ -192,12 +388,12 @@ impl IntelVCpu {
        vmwrite(vmcs::host::CR3, unsafe { cr3() })?;
        vmwrite(
            vmcs::host::CR4,
-            unsafe { cr4() }.bits() as u64, /* | Cr4Flags::OSXSAVE.bits()*/
+            unsafe { cr4() }.bits() as u64 | Cr4Flags::OSXSAVE.bits(),
        )?;

        vmwrite(
            vmcs::host::RIP,
-            crate::vmm::x86_64::intel::asm::asm_vmexit_handler as u64,
+            crate::vmm::x86_64::intel::asm::asm_vmexit_handler as usize as u64,
        )?;
        vmwrite(
            vmcs::host::RSP,
@@ -233,14 +429,18 @@ impl IntelVCpu {

    fn setup_guest_state(&mut self) -> Result<(), &'static str> {
        use x86::{controlregs::*, vmx::vmcs};
-        let cr0 = Cr0::empty()
+        let cr0 = (Cr0::empty()
            | Cr0::CR0_PROTECTED_MODE
-            | Cr0::CR0_NUMERIC_ERROR & !Cr0::CR0_ENABLE_PAGING;
+            | Cr0::CR0_NUMERIC_ERROR
+            | Cr0::CR0_EXTENSION_TYPE)
+            & !Cr0::CR0_ENABLE_PAGING;
        vmwrite(vmcs::guest::CR0, cr0.bits() as u64)?;
-        vmwrite(vmcs::guest::CR3, unsafe { cr3() })?;
+        vmwrite(vmcs::guest::CR3, 0)?;
        vmwrite(
            vmcs::guest::CR4,
-            vmread(vmcs::guest::CR4)? & !Cr4Flags::VIRTUAL_MACHINE_EXTENSIONS.bits(),
+            vmread(vmcs::guest::CR4)?
+                | Cr4Flags::VIRTUAL_MACHINE_EXTENSIONS.bits()
+                    & !Cr4Flags::PHYSICAL_ADDRESS_EXTENSION.bits(),
        )?;

        vmwrite(vmcs::guest::CS_BASE, 0)?;
@@ -335,12 +535,83 @@ impl IntelVCpu {
        vmwrite(vmcs::guest::RIP, common::linux::LAYOUT_KERNEL_BASE)?;
        self.guest_registers.rsi = common::linux::LAYOUT_BOOTPARAM;

-        //vmwrite(vmcs::control::CR0_READ_SHADOW, vmread(vmcs::guest::CR0)?)?;
-        //vmwrite(vmcs::control::CR4_READ_SHADOW, vmread(vmcs::guest::CR4)?)?;
+        vmwrite(vmcs::control::CR0_READ_SHADOW, vmread(vmcs::guest::CR0)?)?;
+        vmwrite(vmcs::control::CR4_READ_SHADOW, vmread(vmcs::guest::CR4)?)?;

        Ok(())
    }

+    fn translate_guest_address(&mut self, vaddr: u64) -> Result<u64, &'static str> {
+        let cr3 = vmread(x86::vmx::vmcs::guest::CR3).map_err(|_| "Failed to read guest CR3")?;
+        let pml4_base = cr3 & !0xFFF; // Clear lower 12 bits to get page table base
+
+        let efer = vmread(x86::vmx::vmcs::guest::IA32_EFER_FULL).unwrap_or(0);
+        let is_long_mode = (efer & (1 << 10)) != 0; // LMA bit
+
+        if !is_long_mode {
+            return Ok(vaddr & 0xFFFFFFFF);
+        }
+
+        let pml4_idx = (vaddr >> 39) & 0x1FF;
+        let pdpt_idx = (vaddr >> 30) & 0x1FF;
+        let pd_idx = (vaddr >> 21) & 0x1FF;
+        let pt_idx = (vaddr >> 12) & 0x1FF;
+        let page_offset = vaddr & 0xFFF;
+
+        let pml4_entry_addr = pml4_base + (pml4_idx * 8);
+        let pml4_entry = self.read_guest_phys_u64(pml4_entry_addr)?;
+        if (pml4_entry & 1) == 0 {
+            return Err("PML4 entry not present");
+        }
+        let pdpt_base = pml4_entry & 0x000FFFFFFFFFF000;
+
+        let pdpt_entry_addr = pdpt_base + (pdpt_idx * 8);
+        let pdpt_entry = self.read_guest_phys_u64(pdpt_entry_addr)?;
+        if (pdpt_entry & 1) == 0 {
+            return Err("PDPT entry not present");
+        }
+
+        if (pdpt_entry & (1 << 7)) != 0 {
+            let page_base = pdpt_entry & 0x000FFFFFC0000000;
+            return Ok(page_base | (vaddr & 0x3FFFFFFF));
+        }
+        let pd_base = pdpt_entry & 0x000FFFFFFFFFF000;
+
+        let pd_entry_addr = pd_base + (pd_idx * 8);
+        let pd_entry = self.read_guest_phys_u64(pd_entry_addr)?;
+        if (pd_entry & 1) == 0 {
+            return Err("PD entry not present");
+        }
+
+        if (pd_entry & (1 << 7)) != 0 {
+            let page_base = pd_entry & 0x000FFFFFFFE00000;
+            return Ok(page_base | (vaddr & 0x1FFFFF));
+        }
+        let pt_base = pd_entry & 0x000FFFFFFFFFF000;
+
+        let pt_entry_addr = pt_base + (pt_idx * 8);
+        let pt_entry = self.read_guest_phys_u64(pt_entry_addr)?;
+        if (pt_entry & 1) == 0 {
+            return Err("PT entry not present");
+        }
+        let page_base = pt_entry & 0x000FFFFFFFFFF000;
+
+        Ok(page_base | page_offset)
+    }
+
+    fn read_guest_phys_u64(&mut self, gpa: u64) -> Result<u64, &'static str> {
+        let mut result_bytes = [0u8; 8];
+
+        for i in 0..8 {
+            match self.ept.get(gpa + i) {
+                Ok(byte) => result_bytes[i as usize] = byte,
+                Err(_) => return Err("Failed to read from Ept"),
+            }
+        }
+
+        Ok(u64::from_le_bytes(result_bytes))
+    }
+
    fn dump_vmcs_settings(&self) -> Result<(), &'static str> {
        info!("=== VMCS Control Fields ===");

@@ -370,9 +641,9 @@ impl IntelVCpu {
        let exit_ctrl = vmread(x86::vmx::vmcs::control::VMEXIT_CONTROLS)?;
        info!("VM-exit controls: {:#x}", exit_ctrl);

-        // EPT pointer
+        // Ept pointer
        let eptp = vmread(x86::vmx::vmcs::control::EPTP_FULL)?;
-        info!("EPT pointer: {:#x}", eptp);
+        info!("Ept pointer: {:#x}", eptp);

        info!("=== Guest State ===");

@@ -624,8 +895,8 @@ impl VCpu for IntelVCpu {

        let vmcs = vmcs::Vmcs::new(frame_allocator)?;

-        let ept = ept::EPT::new(frame_allocator)?;
-        let eptp = ept::EPTP::init(&ept.root_table);
+        let ept = ept::Ept::new(frame_allocator)?;
+        let eptp = ept::Eptp::init(&ept.root_table);

        Ok(IntelVCpu {
            launch_done: false,
@@ -638,6 +909,11 @@ impl VCpu for IntelVCpu {
            guest_memory_size: 1024 * 1024 * 256, // 256 MiB
            host_msr: ShadowMsr::new(),
            guest_msr: ShadowMsr::new(),
+            ia32e_enabled: false,
+            pic: super::io::Pic::new(),
+            io_bitmap: IOBitmap::new(frame_allocator),
+            host_xcr0: 0,
+            guest_xcr0: XCR0::new(),
        })
    }

--- a/nel_os_kernel/src/vmm/x86_64/intel/vmcs/controls.rs
+++ b/nel_os_kernel/src/vmm/x86_64/intel/vmcs/controls.rs
@@ -23,7 +23,7 @@ impl PinBasedVmExecutionControls {
    pub fn read() -> Result<Self, &'static str> {
        vmcs::VmcsControl32::PIN_BASED_VM_EXECUTION_CONTROLS
            .read()
-            .map(|value| PinBasedVmExecutionControls::from(value))
+            .map(PinBasedVmExecutionControls::from)
            .map_err(|_| "Failed to read Pin-Based VM Execution Controls")
    }

@@ -70,7 +70,7 @@ impl PrimaryProcessorBasedVmExecutionControls {
    pub fn read() -> Result<Self, &'static str> {
        vmcs::VmcsControl32::PRIMARY_PROCESSOR_BASED_VM_EXECUTION_CONTROLS
            .read()
-            .map(|value| PrimaryProcessorBasedVmExecutionControls::from(value))
+            .map(PrimaryProcessorBasedVmExecutionControls::from)
            .map_err(|_| "Failed to read Primary Processor-Based VM Execution Controls")
    }

@@ -121,7 +121,7 @@ impl SecondaryProcessorBasedVmExecutionControls {
    pub fn read() -> Result<Self, &'static str> {
        vmcs::VmcsControl32::SECONDARY_PROCESSOR_BASED_VM_EXECUTION_CONTROLS
            .read()
-            .map(|value| SecondaryProcessorBasedVmExecutionControls::from(value))
+            .map(SecondaryProcessorBasedVmExecutionControls::from)
            .map_err(|_| "Failed to read Secondary Processor-Based VM Execution Controls")
    }

@@ -158,7 +158,7 @@ impl EntryControls {
    pub fn read() -> Result<Self, &'static str> {
        vmcs::VmcsControl32::VM_ENTRY_CONTROLS
            .read()
-            .map(|value| EntryControls::from(value))
+            .map(EntryControls::from)
            .map_err(|_| "Failed to read VM Entry Controls")
    }

@@ -200,7 +200,7 @@ impl PrimaryExitControls {
    pub fn read() -> Result<Self, &'static str> {
        vmcs::VmcsControl32::PRIMARY_VM_EXIT_CONTROLS
            .read()
-            .map(|value| PrimaryExitControls::from(value))
+            .map(PrimaryExitControls::from)
            .map_err(|_| "Failed to read Primary VM Exit Controls")
    }

@@ -208,3 +208,14 @@ impl PrimaryExitControls {
        vmcs::VmcsControl32::PRIMARY_VM_EXIT_CONTROLS.write(u32::from(*self))
    }
 }
+
+#[bitfield]
+#[repr(u32)]
+#[derive(Debug, Clone, Copy)]
+pub struct EntryIntrInfo {
+    pub vector: B8,
+    pub typ: B3,
+    pub ec_available: bool,
+    _reserved: B19,
+    pub valid: bool,
+}
--- a/nel_os_kernel/src/vmm/x86_64/intel/vmcs/err.rs
+++ b/nel_os_kernel/src/vmm/x86_64/intel/vmcs/err.rs
@@ -42,7 +42,7 @@ impl InstructionError {
        InstructionError::try_from(err).map_err(|_| "Unknown instruction error")
    }

-    pub fn to_str(&self) -> &'static str {
+    pub fn to_str(self) -> &'static str {
        match self {
            InstructionError::NOT_AVAILABLE => "Instruction not available",
            InstructionError::VMCALL_IN_VMXROOT => "VMCALL in VMX root operation",
--- a/nel_os_kernel/src/vmm/x86_64/intel/vmcs/exit_reason.rs
+++ b/nel_os_kernel/src/vmm/x86_64/intel/vmcs/exit_reason.rs
@@ -139,8 +139,8 @@ impl VmxExitReason {
            VIRTUALIZED_EOI => "Virtualized EOI",
            ACCESS_TO_GDTR_OR_IDTR => "Access to GDTR or IDTR",
            ACCESS_TO_LDTR_OR_TR => "Access to LDTR or TR",
-            EPT_VIOLATION => "EPT violation",
-            EPT_MISCONFIGURATION => "EPT misconfiguration",
+            EPT_VIOLATION => "Ept violation",
+            EPT_MISCONFIGURATION => "Ept misconfiguration",
            INVEPT => "INVEPT instruction execution",
            RDTSCP => "RDTSCP instruction execution",
            VMX_PREEMPTION_TIMER_EXPIRED => "VMX-preemption timer expired",
Author	SHA1	Message	Date
mii443	0bfb86a2b4	wip Some checks failed Check / Build ISO (nightly-2025-04-27) (push) Failing after 44s Details	2025-08-28 19:22:30 +09:00
mii443	baeed3320f	VMCB 014h ~ 068h Some checks failed Check / Build ISO (nightly-2025-04-27) (push) Failing after 41s Details	2025-08-28 16:29:47 +09:00
mii443	525b6cbf0d	AMD VMCB 000h ~ 014h All checks were successful Check / Build ISO (nightly-2025-04-27) (push) Successful in 41s Details	2025-08-28 15:53:30 +09:00
mii443	33c511dcb0	add VMCB Some checks failed Check / Build ISO (nightly-2025-04-27) (push) Failing after 1m29s Details	2025-08-28 13:57:21 +09:00
Masato Imai	53a31749b4	serial wip All checks were successful Check / Build ISO (nightly-2025-04-27) (push) Successful in 1m10s Details	2025-08-26 14:55:38 +00:00
Masato Imai	a355e91c6e	0x3F9 #2 All checks were successful Check / Build ISO (nightly-2025-04-27) (push) Successful in 1m14s Details	2025-08-25 12:02:53 +00:00
Masato Imai	294e4f719d	fix QualIO #2 All checks were successful Check / Build ISO (nightly-2025-04-27) (push) Successful in 41s Details	2025-08-24 14:07:52 +00:00
Masato Imai	1606184551	Serial I/O buffer #2 All checks were successful Check / Build ISO (nightly-2025-04-27) (push) Successful in 42s Details	2025-08-24 12:24:53 +00:00
Masato Imai	a0188056f0	Serial I/O virtualization #2	2025-08-24 12:14:02 +00:00
Masato Imai	db650f470f	clippy All checks were successful Check / Build ISO (nightly-2025-04-27) (push) Successful in 1m18s Details	2025-08-24 05:23:18 +00:00
Masato Imai	5df8c77ea7	fix XCR0 emulation All checks were successful Check / Build ISO (nightly-2025-04-27) (push) Successful in 46s Details Release ISO / release (push) Successful in 57s Details	2025-08-23 07:15:22 +00:00
Masato Imai	2d0db85574	add XSETBV, CLAC, STAC, initrd All checks were successful Check / Build ISO (nightly-2025-04-27) (push) Successful in 43s Details	2025-08-22 14:32:21 +00:00
Masato Imai	df56e251e4	add external interrupt All checks were successful Check / Build ISO (nightly-2025-04-27) (push) Successful in 46s Details	2025-08-22 13:32:40 +00:00
Masato Imai	b215f0010f	support low ram machine Some checks failed Check / Build ISO (nightly-2025-04-27) (push) Failing after 43s Details	2025-08-22 12:59:05 +00:00
Masato Imai	ecad19bb5e	fix warn All checks were successful Check / Build ISO (nightly-2025-04-27) (push) Successful in 43s Details Release ISO / release (push) Successful in 57s Details	2025-08-22 12:29:01 +00:00
Masato Imai	94cbcd6a1f	io bitmap Some checks failed Check / Build ISO (nightly-2025-04-27) (push) Failing after 45s Details	2025-08-22 12:18:50 +00:00
Masato Imai	de21059b53	add pic Some checks failed Check / Build ISO (nightly-2025-04-27) (push) Failing after 44s Details	2025-08-22 10:06:38 +00:00
Masato Imai	7fb000f5ce	intr subscriber Some checks failed Check / Build ISO (nightly-2025-04-27) (push) Failing after 46s Details	2025-08-22 09:51:20 +00:00
Masato Imai	fc93be3043	add CR handler Some checks failed Check / Build ISO (nightly-2025-04-27) (push) Failing after 44s Details	2025-08-22 09:07:00 +00:00
Masato Imai	4a44cdea8d	qual, cr Some checks failed Check / Build ISO (nightly-2025-04-27) (push) Failing after 45s Details	2025-08-22 09:01:32 +00:00
Masato Imai	a0a204b43c	cr vmexit Some checks failed Check / Build ISO (nightly-2025-04-27) (push) Failing after 46s Details	2025-08-22 08:34:41 +00:00
mii443	52098ee0e9	ignore img All checks were successful Check / Build ISO (nightly-2025-04-27) (push) Successful in 1m17s Details	2025-08-22 15:09:06 +09:00
mii443	26db917d24	wip	2025-08-22 15:07:05 +09:00
Masato Imai	eec02f141a	check io, msr bitmaps, nmi, vmcs shadow, ept, int All checks were successful Check / Build ISO (nightly-2025-04-27) (push) Successful in 1m46s Details	2025-08-19 14:26:16 +00:00
Masato Imai	8672e49912	add readme All checks were successful Check / Build ISO (nightly-2025-04-27) (push) Successful in 44s Details	2025-08-15 18:21:02 +00:00
				`@@ -0,0 +1 @@`
				`![check](https://git.mii.dev/mii/nel_os_uefi/actions/workflows/check.yaml/badge.svg?branch=main)`