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This commit is contained in:
Masato Imai
2025-06-25 04:04:11 +00:00
parent 6943d87c42
commit 84f619206c
3 changed files with 26 additions and 1 deletions
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rootfs-n.cpio.gz
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24
src/vmm/cpuid.rs
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@ -5,11 +5,33 @@ use super::{vcpu::VCpu, vmcs::VmxLeaf};
pub fn handle_cpuid_exit(vcpu: &mut VCpu) {
let regs = &mut vcpu.guest_registers;
info!("CPUID called with EAX={:#x}, ECX={:#x}", regs.rax, regs.rcx);
let vendor: &[u8; 12] = b"miHypervisor";
let brand_string: &[u8; 48] = b"Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz \0";
let vendor = unsafe { core::mem::transmute::<&[u8; 12], &[u32; 3]>(vendor) };
let brand_string = unsafe { core::mem::transmute::<&[u8; 48], &[u32; 12]>(brand_string) };
match VmxLeaf::from(regs.rax) {
VmxLeaf::EXTENDED_FEATURE_2 => {
regs.rax = brand_string[0] as u64;
regs.rbx = brand_string[1] as u64;
regs.rcx = brand_string[2] as u64;
regs.rdx = brand_string[3] as u64;
}
VmxLeaf::EXTENDED_FEATURE_3 => {
regs.rax = brand_string[4] as u64;
regs.rbx = brand_string[5] as u64;
regs.rcx = brand_string[6] as u64;
regs.rdx = brand_string[7] as u64;
}
VmxLeaf::EXTENDED_FEATURE_4 => {
regs.rax = brand_string[8] as u64;
regs.rbx = brand_string[9] as u64;
regs.rcx = brand_string[10] as u64;
regs.rdx = brand_string[11] as u64;
}
VmxLeaf::EXTENDED_ENUMERATION => {
match regs.rcx {
0 => {
@ -68,7 +90,7 @@ pub fn handle_cpuid_exit(vcpu: &mut VCpu) {
regs.rdx = signature.edx as u64;
}
VmxLeaf::EXTENDED_FUNCTION => {
regs.rax = 0x80000000 + 1;
regs.rax = 0x80000000 + 4;
regs.rbx = 0x00000000;
regs.rcx = 0x00000000;
regs.rdx = 0x00000000;

3
src/vmm/vmcs.rs
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@ -641,6 +641,9 @@ pub enum VmxLeaf {
EXTENDED_ENUMERATION = 0xD,
EXTENDED_FUNCTION = 0x80000000,
EXTENDED_PROCESSOR_SIGNATURE = 0x80000001,
EXTENDED_FEATURE_2 = 0x80000002,
EXTENDED_FEATURE_3 = 0x80000003,
EXTENDED_FEATURE_4 = 0x80000004,
UNKNOWN = 0xFFFFFFFF,
}