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qemu/target/i386/hvf/x86hvf.c
Alexander Graf 39a3445012 hvf: Move vcpu thread functions into common directory 
Until now, Hypervisor.framework has only been available on x86_64 systems.
With Apple Silicon shipping now, it extends its reach to aarch64. To
prepare for support for multiple architectures, let's start moving common
code out into its own accel directory.

This patch moves the vCPU thread loop over.

Signed-off-by: Alexander Graf <agraf@csgraf.de>
Reviewed-by: Sergio Lopez <slp@redhat.com>
Message-id: 20210519202253.76782-3-agraf@csgraf.de
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-06-03 16:43:26 +01:00

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/*
* Copyright (c) 2003-2008 Fabrice Bellard
* Copyright (C) 2016 Veertu Inc,
* Copyright (C) 2017 Google Inc,
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "x86hvf.h"
#include "vmx.h"
#include "vmcs.h"
#include "cpu.h"
#include "x86_descr.h"
#include "x86_decode.h"
#include "hw/i386/apic_internal.h"
#include <Hypervisor/hv.h>
#include <Hypervisor/hv_vmx.h>
#include "accel/hvf/hvf-accel-ops.h"
void hvf_set_segment(struct CPUState *cpu, struct vmx_segment *vmx_seg,
SegmentCache *qseg, bool is_tr)
{
vmx_seg->sel = qseg->selector;
vmx_seg->base = qseg->base;
vmx_seg->limit = qseg->limit;
if (!qseg->selector && !x86_is_real(cpu) && !is_tr) {
/* the TR register is usable after processor reset despite
* having a null selector */
vmx_seg->ar = 1 << 16;
return;
}
vmx_seg->ar = (qseg->flags >> DESC_TYPE_SHIFT) & 0xf;
vmx_seg->ar |= ((qseg->flags >> DESC_G_SHIFT) & 1) << 15;
vmx_seg->ar |= ((qseg->flags >> DESC_B_SHIFT) & 1) << 14;
vmx_seg->ar |= ((qseg->flags >> DESC_L_SHIFT) & 1) << 13;
vmx_seg->ar |= ((qseg->flags >> DESC_AVL_SHIFT) & 1) << 12;
vmx_seg->ar |= ((qseg->flags >> DESC_P_SHIFT) & 1) << 7;
vmx_seg->ar |= ((qseg->flags >> DESC_DPL_SHIFT) & 3) << 5;
vmx_seg->ar |= ((qseg->flags >> DESC_S_SHIFT) & 1) << 4;
}
void hvf_get_segment(SegmentCache *qseg, struct vmx_segment *vmx_seg)
{
qseg->limit = vmx_seg->limit;
qseg->base = vmx_seg->base;
qseg->selector = vmx_seg->sel;
qseg->flags = ((vmx_seg->ar & 0xf) << DESC_TYPE_SHIFT) |
(((vmx_seg->ar >> 4) & 1) << DESC_S_SHIFT) |
(((vmx_seg->ar >> 5) & 3) << DESC_DPL_SHIFT) |
(((vmx_seg->ar >> 7) & 1) << DESC_P_SHIFT) |
(((vmx_seg->ar >> 12) & 1) << DESC_AVL_SHIFT) |
(((vmx_seg->ar >> 13) & 1) << DESC_L_SHIFT) |
(((vmx_seg->ar >> 14) & 1) << DESC_B_SHIFT) |
(((vmx_seg->ar >> 15) & 1) << DESC_G_SHIFT);
}
void hvf_put_xsave(CPUState *cpu_state)
{
struct X86XSaveArea *xsave;
xsave = X86_CPU(cpu_state)->env.xsave_buf;
x86_cpu_xsave_all_areas(X86_CPU(cpu_state), xsave);
if (hv_vcpu_write_fpstate(cpu_state->hvf_fd, (void*)xsave, 4096)) {
abort();
}
}
void hvf_put_segments(CPUState *cpu_state)
{
CPUX86State *env = &X86_CPU(cpu_state)->env;
struct vmx_segment seg;
wvmcs(cpu_state->hvf_fd, VMCS_GUEST_IDTR_LIMIT, env->idt.limit);
wvmcs(cpu_state->hvf_fd, VMCS_GUEST_IDTR_BASE, env->idt.base);
wvmcs(cpu_state->hvf_fd, VMCS_GUEST_GDTR_LIMIT, env->gdt.limit);
wvmcs(cpu_state->hvf_fd, VMCS_GUEST_GDTR_BASE, env->gdt.base);
/* wvmcs(cpu_state->hvf_fd, VMCS_GUEST_CR2, env->cr[2]); */
wvmcs(cpu_state->hvf_fd, VMCS_GUEST_CR3, env->cr[3]);
vmx_update_tpr(cpu_state);
wvmcs(cpu_state->hvf_fd, VMCS_GUEST_IA32_EFER, env->efer);
macvm_set_cr4(cpu_state->hvf_fd, env->cr[4]);
macvm_set_cr0(cpu_state->hvf_fd, env->cr[0]);
hvf_set_segment(cpu_state, &seg, &env->segs[R_CS], false);
vmx_write_segment_descriptor(cpu_state, &seg, R_CS);
hvf_set_segment(cpu_state, &seg, &env->segs[R_DS], false);
vmx_write_segment_descriptor(cpu_state, &seg, R_DS);
hvf_set_segment(cpu_state, &seg, &env->segs[R_ES], false);
vmx_write_segment_descriptor(cpu_state, &seg, R_ES);
hvf_set_segment(cpu_state, &seg, &env->segs[R_SS], false);
vmx_write_segment_descriptor(cpu_state, &seg, R_SS);
hvf_set_segment(cpu_state, &seg, &env->segs[R_FS], false);
vmx_write_segment_descriptor(cpu_state, &seg, R_FS);
hvf_set_segment(cpu_state, &seg, &env->segs[R_GS], false);
vmx_write_segment_descriptor(cpu_state, &seg, R_GS);
hvf_set_segment(cpu_state, &seg, &env->tr, true);
vmx_write_segment_descriptor(cpu_state, &seg, R_TR);
hvf_set_segment(cpu_state, &seg, &env->ldt, false);
vmx_write_segment_descriptor(cpu_state, &seg, R_LDTR);
hv_vcpu_flush(cpu_state->hvf_fd);
}
void hvf_put_msrs(CPUState *cpu_state)
{
CPUX86State *env = &X86_CPU(cpu_state)->env;
hv_vcpu_write_msr(cpu_state->hvf_fd, MSR_IA32_SYSENTER_CS,
env->sysenter_cs);
hv_vcpu_write_msr(cpu_state->hvf_fd, MSR_IA32_SYSENTER_ESP,
env->sysenter_esp);
hv_vcpu_write_msr(cpu_state->hvf_fd, MSR_IA32_SYSENTER_EIP,
env->sysenter_eip);
hv_vcpu_write_msr(cpu_state->hvf_fd, MSR_STAR, env->star);
#ifdef TARGET_X86_64
hv_vcpu_write_msr(cpu_state->hvf_fd, MSR_CSTAR, env->cstar);
hv_vcpu_write_msr(cpu_state->hvf_fd, MSR_KERNELGSBASE, env->kernelgsbase);
hv_vcpu_write_msr(cpu_state->hvf_fd, MSR_FMASK, env->fmask);
hv_vcpu_write_msr(cpu_state->hvf_fd, MSR_LSTAR, env->lstar);
#endif
hv_vcpu_write_msr(cpu_state->hvf_fd, MSR_GSBASE, env->segs[R_GS].base);
hv_vcpu_write_msr(cpu_state->hvf_fd, MSR_FSBASE, env->segs[R_FS].base);
}
void hvf_get_xsave(CPUState *cpu_state)
{
struct X86XSaveArea *xsave;
xsave = X86_CPU(cpu_state)->env.xsave_buf;
if (hv_vcpu_read_fpstate(cpu_state->hvf_fd, (void*)xsave, 4096)) {
abort();
}
x86_cpu_xrstor_all_areas(X86_CPU(cpu_state), xsave);
}
void hvf_get_segments(CPUState *cpu_state)
{
CPUX86State *env = &X86_CPU(cpu_state)->env;
struct vmx_segment seg;
env->interrupt_injected = -1;
vmx_read_segment_descriptor(cpu_state, &seg, R_CS);
hvf_get_segment(&env->segs[R_CS], &seg);
vmx_read_segment_descriptor(cpu_state, &seg, R_DS);
hvf_get_segment(&env->segs[R_DS], &seg);
vmx_read_segment_descriptor(cpu_state, &seg, R_ES);
hvf_get_segment(&env->segs[R_ES], &seg);
vmx_read_segment_descriptor(cpu_state, &seg, R_FS);
hvf_get_segment(&env->segs[R_FS], &seg);
vmx_read_segment_descriptor(cpu_state, &seg, R_GS);
hvf_get_segment(&env->segs[R_GS], &seg);
vmx_read_segment_descriptor(cpu_state, &seg, R_SS);
hvf_get_segment(&env->segs[R_SS], &seg);
vmx_read_segment_descriptor(cpu_state, &seg, R_TR);
hvf_get_segment(&env->tr, &seg);
vmx_read_segment_descriptor(cpu_state, &seg, R_LDTR);
hvf_get_segment(&env->ldt, &seg);
env->idt.limit = rvmcs(cpu_state->hvf_fd, VMCS_GUEST_IDTR_LIMIT);
env->idt.base = rvmcs(cpu_state->hvf_fd, VMCS_GUEST_IDTR_BASE);
env->gdt.limit = rvmcs(cpu_state->hvf_fd, VMCS_GUEST_GDTR_LIMIT);
env->gdt.base = rvmcs(cpu_state->hvf_fd, VMCS_GUEST_GDTR_BASE);
env->cr[0] = rvmcs(cpu_state->hvf_fd, VMCS_GUEST_CR0);
env->cr[2] = 0;
env->cr[3] = rvmcs(cpu_state->hvf_fd, VMCS_GUEST_CR3);
env->cr[4] = rvmcs(cpu_state->hvf_fd, VMCS_GUEST_CR4);
env->efer = rvmcs(cpu_state->hvf_fd, VMCS_GUEST_IA32_EFER);
}
void hvf_get_msrs(CPUState *cpu_state)
{
CPUX86State *env = &X86_CPU(cpu_state)->env;
uint64_t tmp;
hv_vcpu_read_msr(cpu_state->hvf_fd, MSR_IA32_SYSENTER_CS, &tmp);
env->sysenter_cs = tmp;
hv_vcpu_read_msr(cpu_state->hvf_fd, MSR_IA32_SYSENTER_ESP, &tmp);
env->sysenter_esp = tmp;
hv_vcpu_read_msr(cpu_state->hvf_fd, MSR_IA32_SYSENTER_EIP, &tmp);
env->sysenter_eip = tmp;
hv_vcpu_read_msr(cpu_state->hvf_fd, MSR_STAR, &env->star);
#ifdef TARGET_X86_64
hv_vcpu_read_msr(cpu_state->hvf_fd, MSR_CSTAR, &env->cstar);
hv_vcpu_read_msr(cpu_state->hvf_fd, MSR_KERNELGSBASE, &env->kernelgsbase);
hv_vcpu_read_msr(cpu_state->hvf_fd, MSR_FMASK, &env->fmask);
hv_vcpu_read_msr(cpu_state->hvf_fd, MSR_LSTAR, &env->lstar);
#endif
hv_vcpu_read_msr(cpu_state->hvf_fd, MSR_IA32_APICBASE, &tmp);
env->tsc = rdtscp() + rvmcs(cpu_state->hvf_fd, VMCS_TSC_OFFSET);
}
int hvf_put_registers(CPUState *cpu_state)
{
X86CPU *x86cpu = X86_CPU(cpu_state);
CPUX86State *env = &x86cpu->env;
wreg(cpu_state->hvf_fd, HV_X86_RAX, env->regs[R_EAX]);
wreg(cpu_state->hvf_fd, HV_X86_RBX, env->regs[R_EBX]);
wreg(cpu_state->hvf_fd, HV_X86_RCX, env->regs[R_ECX]);
wreg(cpu_state->hvf_fd, HV_X86_RDX, env->regs[R_EDX]);
wreg(cpu_state->hvf_fd, HV_X86_RBP, env->regs[R_EBP]);
wreg(cpu_state->hvf_fd, HV_X86_RSP, env->regs[R_ESP]);
wreg(cpu_state->hvf_fd, HV_X86_RSI, env->regs[R_ESI]);
wreg(cpu_state->hvf_fd, HV_X86_RDI, env->regs[R_EDI]);
wreg(cpu_state->hvf_fd, HV_X86_R8, env->regs[8]);
wreg(cpu_state->hvf_fd, HV_X86_R9, env->regs[9]);
wreg(cpu_state->hvf_fd, HV_X86_R10, env->regs[10]);
wreg(cpu_state->hvf_fd, HV_X86_R11, env->regs[11]);
wreg(cpu_state->hvf_fd, HV_X86_R12, env->regs[12]);
wreg(cpu_state->hvf_fd, HV_X86_R13, env->regs[13]);
wreg(cpu_state->hvf_fd, HV_X86_R14, env->regs[14]);
wreg(cpu_state->hvf_fd, HV_X86_R15, env->regs[15]);
wreg(cpu_state->hvf_fd, HV_X86_RFLAGS, env->eflags);
wreg(cpu_state->hvf_fd, HV_X86_RIP, env->eip);
wreg(cpu_state->hvf_fd, HV_X86_XCR0, env->xcr0);
hvf_put_xsave(cpu_state);
hvf_put_segments(cpu_state);
hvf_put_msrs(cpu_state);
wreg(cpu_state->hvf_fd, HV_X86_DR0, env->dr[0]);
wreg(cpu_state->hvf_fd, HV_X86_DR1, env->dr[1]);
wreg(cpu_state->hvf_fd, HV_X86_DR2, env->dr[2]);
wreg(cpu_state->hvf_fd, HV_X86_DR3, env->dr[3]);
wreg(cpu_state->hvf_fd, HV_X86_DR4, env->dr[4]);
wreg(cpu_state->hvf_fd, HV_X86_DR5, env->dr[5]);
wreg(cpu_state->hvf_fd, HV_X86_DR6, env->dr[6]);
wreg(cpu_state->hvf_fd, HV_X86_DR7, env->dr[7]);
return 0;
}
int hvf_get_registers(CPUState *cpu_state)
{
X86CPU *x86cpu = X86_CPU(cpu_state);
CPUX86State *env = &x86cpu->env;
env->regs[R_EAX] = rreg(cpu_state->hvf_fd, HV_X86_RAX);
env->regs[R_EBX] = rreg(cpu_state->hvf_fd, HV_X86_RBX);
env->regs[R_ECX] = rreg(cpu_state->hvf_fd, HV_X86_RCX);
env->regs[R_EDX] = rreg(cpu_state->hvf_fd, HV_X86_RDX);
env->regs[R_EBP] = rreg(cpu_state->hvf_fd, HV_X86_RBP);
env->regs[R_ESP] = rreg(cpu_state->hvf_fd, HV_X86_RSP);
env->regs[R_ESI] = rreg(cpu_state->hvf_fd, HV_X86_RSI);
env->regs[R_EDI] = rreg(cpu_state->hvf_fd, HV_X86_RDI);
env->regs[8] = rreg(cpu_state->hvf_fd, HV_X86_R8);
env->regs[9] = rreg(cpu_state->hvf_fd, HV_X86_R9);
env->regs[10] = rreg(cpu_state->hvf_fd, HV_X86_R10);
env->regs[11] = rreg(cpu_state->hvf_fd, HV_X86_R11);
env->regs[12] = rreg(cpu_state->hvf_fd, HV_X86_R12);
env->regs[13] = rreg(cpu_state->hvf_fd, HV_X86_R13);
env->regs[14] = rreg(cpu_state->hvf_fd, HV_X86_R14);
env->regs[15] = rreg(cpu_state->hvf_fd, HV_X86_R15);
env->eflags = rreg(cpu_state->hvf_fd, HV_X86_RFLAGS);
env->eip = rreg(cpu_state->hvf_fd, HV_X86_RIP);
hvf_get_xsave(cpu_state);
env->xcr0 = rreg(cpu_state->hvf_fd, HV_X86_XCR0);
hvf_get_segments(cpu_state);
hvf_get_msrs(cpu_state);
env->dr[0] = rreg(cpu_state->hvf_fd, HV_X86_DR0);
env->dr[1] = rreg(cpu_state->hvf_fd, HV_X86_DR1);
env->dr[2] = rreg(cpu_state->hvf_fd, HV_X86_DR2);
env->dr[3] = rreg(cpu_state->hvf_fd, HV_X86_DR3);
env->dr[4] = rreg(cpu_state->hvf_fd, HV_X86_DR4);
env->dr[5] = rreg(cpu_state->hvf_fd, HV_X86_DR5);
env->dr[6] = rreg(cpu_state->hvf_fd, HV_X86_DR6);
env->dr[7] = rreg(cpu_state->hvf_fd, HV_X86_DR7);
x86_update_hflags(env);
return 0;
}
static void vmx_set_int_window_exiting(CPUState *cpu)
{
uint64_t val;
val = rvmcs(cpu->hvf_fd, VMCS_PRI_PROC_BASED_CTLS);
wvmcs(cpu->hvf_fd, VMCS_PRI_PROC_BASED_CTLS, val |
VMCS_PRI_PROC_BASED_CTLS_INT_WINDOW_EXITING);
}
void vmx_clear_int_window_exiting(CPUState *cpu)
{
uint64_t val;
val = rvmcs(cpu->hvf_fd, VMCS_PRI_PROC_BASED_CTLS);
wvmcs(cpu->hvf_fd, VMCS_PRI_PROC_BASED_CTLS, val &
~VMCS_PRI_PROC_BASED_CTLS_INT_WINDOW_EXITING);
}
bool hvf_inject_interrupts(CPUState *cpu_state)
{
X86CPU *x86cpu = X86_CPU(cpu_state);
CPUX86State *env = &x86cpu->env;
uint8_t vector;
uint64_t intr_type;
bool have_event = true;
if (env->interrupt_injected != -1) {
vector = env->interrupt_injected;
if (env->ins_len) {
intr_type = VMCS_INTR_T_SWINTR;
} else {
intr_type = VMCS_INTR_T_HWINTR;
}
} else if (env->exception_nr != -1) {
vector = env->exception_nr;
if (vector == EXCP03_INT3 || vector == EXCP04_INTO) {
intr_type = VMCS_INTR_T_SWEXCEPTION;
} else {
intr_type = VMCS_INTR_T_HWEXCEPTION;
}
} else if (env->nmi_injected) {
vector = EXCP02_NMI;
intr_type = VMCS_INTR_T_NMI;
} else {
have_event = false;
}
uint64_t info = 0;
if (have_event) {
info = vector | intr_type | VMCS_INTR_VALID;
uint64_t reason = rvmcs(cpu_state->hvf_fd, VMCS_EXIT_REASON);
if (env->nmi_injected && reason != EXIT_REASON_TASK_SWITCH) {
vmx_clear_nmi_blocking(cpu_state);
}
if (!(env->hflags2 & HF2_NMI_MASK) || intr_type != VMCS_INTR_T_NMI) {
info &= ~(1 << 12); /* clear undefined bit */
if (intr_type == VMCS_INTR_T_SWINTR ||
intr_type == VMCS_INTR_T_SWEXCEPTION) {
wvmcs(cpu_state->hvf_fd, VMCS_ENTRY_INST_LENGTH, env->ins_len);
}
if (env->has_error_code) {
wvmcs(cpu_state->hvf_fd, VMCS_ENTRY_EXCEPTION_ERROR,
env->error_code);
/* Indicate that VMCS_ENTRY_EXCEPTION_ERROR is valid */
info |= VMCS_INTR_DEL_ERRCODE;
}
/*printf("reinject %lx err %d\n", info, err);*/
wvmcs(cpu_state->hvf_fd, VMCS_ENTRY_INTR_INFO, info);
};
}
if (cpu_state->interrupt_request & CPU_INTERRUPT_NMI) {
if (!(env->hflags2 & HF2_NMI_MASK) && !(info & VMCS_INTR_VALID)) {
cpu_state->interrupt_request &= ~CPU_INTERRUPT_NMI;
info = VMCS_INTR_VALID | VMCS_INTR_T_NMI | EXCP02_NMI;
wvmcs(cpu_state->hvf_fd, VMCS_ENTRY_INTR_INFO, info);
} else {
vmx_set_nmi_window_exiting(cpu_state);
}
}
if (!(env->hflags & HF_INHIBIT_IRQ_MASK) &&
(cpu_state->interrupt_request & CPU_INTERRUPT_HARD) &&
(env->eflags & IF_MASK) && !(info & VMCS_INTR_VALID)) {
int line = cpu_get_pic_interrupt(&x86cpu->env);
cpu_state->interrupt_request &= ~CPU_INTERRUPT_HARD;
if (line >= 0) {
wvmcs(cpu_state->hvf_fd, VMCS_ENTRY_INTR_INFO, line |
VMCS_INTR_VALID | VMCS_INTR_T_HWINTR);
}
}
if (cpu_state->interrupt_request & CPU_INTERRUPT_HARD) {
vmx_set_int_window_exiting(cpu_state);
}
return (cpu_state->interrupt_request
& (CPU_INTERRUPT_INIT | CPU_INTERRUPT_TPR));
}
int hvf_process_events(CPUState *cpu_state)
{
X86CPU *cpu = X86_CPU(cpu_state);
CPUX86State *env = &cpu->env;
env->eflags = rreg(cpu_state->hvf_fd, HV_X86_RFLAGS);
if (cpu_state->interrupt_request & CPU_INTERRUPT_INIT) {
hvf_cpu_synchronize_state(cpu_state);
do_cpu_init(cpu);
}
if (cpu_state->interrupt_request & CPU_INTERRUPT_POLL) {
cpu_state->interrupt_request &= ~CPU_INTERRUPT_POLL;
apic_poll_irq(cpu->apic_state);
}
if (((cpu_state->interrupt_request & CPU_INTERRUPT_HARD) &&
(env->eflags & IF_MASK)) ||
(cpu_state->interrupt_request & CPU_INTERRUPT_NMI)) {
cpu_state->halted = 0;
}
if (cpu_state->interrupt_request & CPU_INTERRUPT_SIPI) {
hvf_cpu_synchronize_state(cpu_state);
do_cpu_sipi(cpu);
}
if (cpu_state->interrupt_request & CPU_INTERRUPT_TPR) {
cpu_state->interrupt_request &= ~CPU_INTERRUPT_TPR;
hvf_cpu_synchronize_state(cpu_state);
apic_handle_tpr_access_report(cpu->apic_state, env->eip,
env->tpr_access_type);
}
return cpu_state->halted;
}
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