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qemu-e2k/target/i386/whpx-all.c
Justin Terry (VM) 812d49f2a3 Introduce the WHPX impl 
Implements the Windows Hypervisor Platform accelerator (WHPX) target. Which
acts as a hypervisor accelerator for QEMU on the Windows platform. This enables
QEMU much greater speed over the emulated x86_64 path's that are taken on
Windows today.

1. Adds support for vPartition management.
2. Adds support for vCPU management.
3. Adds support for MMIO/PortIO.
4. Registers the WHPX ACCEL_CLASS.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <1516655269-1785-4-git-send-email-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-02-07 14:09:26 +01:00

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/*
* QEMU Windows Hypervisor Platform accelerator (WHPX)
*
* Copyright Microsoft Corp. 2017
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/address-spaces.h"
#include "exec/exec-all.h"
#include "exec/ioport.h"
#include "qemu-common.h"
#include "strings.h"
#include "sysemu/accel.h"
#include "sysemu/whpx.h"
#include "sysemu/sysemu.h"
#include "sysemu/cpus.h"
#include "qemu/main-loop.h"
#include "hw/boards.h"
#include "qemu/error-report.h"
#include "qemu/queue.h"
#include "qapi/error.h"
#include "migration/blocker.h"
#include <winhvplatform.h>
#include <winhvemulation.h>
struct whpx_state {
uint64_t mem_quota;
WHV_PARTITION_HANDLE partition;
uint32_t exit_ctx_size;
};
static const WHV_REGISTER_NAME whpx_register_names[] = {
/* X64 General purpose registers */
WHvX64RegisterRax,
WHvX64RegisterRcx,
WHvX64RegisterRdx,
WHvX64RegisterRbx,
WHvX64RegisterRsp,
WHvX64RegisterRbp,
WHvX64RegisterRsi,
WHvX64RegisterRdi,
WHvX64RegisterR8,
WHvX64RegisterR9,
WHvX64RegisterR10,
WHvX64RegisterR11,
WHvX64RegisterR12,
WHvX64RegisterR13,
WHvX64RegisterR14,
WHvX64RegisterR15,
WHvX64RegisterRip,
WHvX64RegisterRflags,
/* X64 Segment registers */
WHvX64RegisterEs,
WHvX64RegisterCs,
WHvX64RegisterSs,
WHvX64RegisterDs,
WHvX64RegisterFs,
WHvX64RegisterGs,
WHvX64RegisterLdtr,
WHvX64RegisterTr,
/* X64 Table registers */
WHvX64RegisterIdtr,
WHvX64RegisterGdtr,
/* X64 Control Registers */
WHvX64RegisterCr0,
WHvX64RegisterCr2,
WHvX64RegisterCr3,
WHvX64RegisterCr4,
WHvX64RegisterCr8,
/* X64 Debug Registers */
/*
* WHvX64RegisterDr0,
* WHvX64RegisterDr1,
* WHvX64RegisterDr2,
* WHvX64RegisterDr3,
* WHvX64RegisterDr6,
* WHvX64RegisterDr7,
*/
/* X64 Floating Point and Vector Registers */
WHvX64RegisterXmm0,
WHvX64RegisterXmm1,
WHvX64RegisterXmm2,
WHvX64RegisterXmm3,
WHvX64RegisterXmm4,
WHvX64RegisterXmm5,
WHvX64RegisterXmm6,
WHvX64RegisterXmm7,
WHvX64RegisterXmm8,
WHvX64RegisterXmm9,
WHvX64RegisterXmm10,
WHvX64RegisterXmm11,
WHvX64RegisterXmm12,
WHvX64RegisterXmm13,
WHvX64RegisterXmm14,
WHvX64RegisterXmm15,
WHvX64RegisterFpMmx0,
WHvX64RegisterFpMmx1,
WHvX64RegisterFpMmx2,
WHvX64RegisterFpMmx3,
WHvX64RegisterFpMmx4,
WHvX64RegisterFpMmx5,
WHvX64RegisterFpMmx6,
WHvX64RegisterFpMmx7,
WHvX64RegisterFpControlStatus,
WHvX64RegisterXmmControlStatus,
/* X64 MSRs */
WHvX64RegisterTsc,
WHvX64RegisterEfer,
#ifdef TARGET_X86_64
WHvX64RegisterKernelGsBase,
#endif
WHvX64RegisterApicBase,
/* WHvX64RegisterPat, */
WHvX64RegisterSysenterCs,
WHvX64RegisterSysenterEip,
WHvX64RegisterSysenterEsp,
WHvX64RegisterStar,
#ifdef TARGET_X86_64
WHvX64RegisterLstar,
WHvX64RegisterCstar,
WHvX64RegisterSfmask,
#endif
/* Interrupt / Event Registers */
/*
* WHvRegisterPendingInterruption,
* WHvRegisterInterruptState,
* WHvRegisterPendingEvent0,
* WHvRegisterPendingEvent1
* WHvX64RegisterDeliverabilityNotifications,
*/
};
struct whpx_register_set {
WHV_REGISTER_VALUE values[RTL_NUMBER_OF(whpx_register_names)];
};
struct whpx_vcpu {
WHV_EMULATOR_HANDLE emulator;
bool window_registered;
bool interruptable;
uint64_t tpr;
uint64_t apic_base;
WHV_X64_PENDING_INTERRUPTION_REGISTER interrupt_in_flight;
/* Must be the last field as it may have a tail */
WHV_RUN_VP_EXIT_CONTEXT exit_ctx;
};
static bool whpx_allowed;
struct whpx_state whpx_global;
/*
* VP support
*/
static struct whpx_vcpu *get_whpx_vcpu(CPUState *cpu)
{
return (struct whpx_vcpu *)cpu->hax_vcpu;
}
static WHV_X64_SEGMENT_REGISTER whpx_seg_q2h(const SegmentCache *qs, int v86,
int r86)
{
WHV_X64_SEGMENT_REGISTER hs;
unsigned flags = qs->flags;
hs.Base = qs->base;
hs.Limit = qs->limit;
hs.Selector = qs->selector;
if (v86) {
hs.Attributes = 0;
hs.SegmentType = 3;
hs.Present = 1;
hs.DescriptorPrivilegeLevel = 3;
hs.NonSystemSegment = 1;
} else {
hs.Attributes = (flags >> DESC_TYPE_SHIFT);
if (r86) {
/* hs.Base &= 0xfffff; */
}
}
return hs;
}
static SegmentCache whpx_seg_h2q(const WHV_X64_SEGMENT_REGISTER *hs)
{
SegmentCache qs;
qs.base = hs->Base;
qs.limit = hs->Limit;
qs.selector = hs->Selector;
qs.flags = ((uint32_t)hs->Attributes) << DESC_TYPE_SHIFT;
return qs;
}
static void whpx_set_registers(CPUState *cpu)
{
struct whpx_state *whpx = &whpx_global;
struct whpx_vcpu *vcpu = get_whpx_vcpu(cpu);
struct CPUX86State *env = (CPUArchState *)(cpu->env_ptr);
X86CPU *x86_cpu = X86_CPU(cpu);
struct whpx_register_set vcxt = {0};
HRESULT hr;
int idx = 0;
int i;
int v86, r86;
assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu));
v86 = (env->eflags & VM_MASK);
r86 = !(env->cr[0] & CR0_PE_MASK);
vcpu->tpr = cpu_get_apic_tpr(x86_cpu->apic_state);
vcpu->apic_base = cpu_get_apic_base(x86_cpu->apic_state);
/* Indexes for first 16 registers match between HV and QEMU definitions */
for (idx = 0; idx < CPU_NB_REGS64; idx += 1) {
vcxt.values[idx].Reg64 = env->regs[idx];
}
/* Same goes for RIP and RFLAGS */
assert(whpx_register_names[idx] == WHvX64RegisterRip);
vcxt.values[idx++].Reg64 = env->eip;
assert(whpx_register_names[idx] == WHvX64RegisterRflags);
vcxt.values[idx++].Reg64 = env->eflags;
/* Translate 6+4 segment registers. HV and QEMU order matches */
assert(idx == WHvX64RegisterEs);
for (i = 0; i < 6; i += 1, idx += 1) {
vcxt.values[idx].Segment = whpx_seg_q2h(&env->segs[i], v86, r86);
}
assert(idx == WHvX64RegisterLdtr);
vcxt.values[idx++].Segment = whpx_seg_q2h(&env->ldt, 0, 0);
assert(idx == WHvX64RegisterTr);
vcxt.values[idx++].Segment = whpx_seg_q2h(&env->tr, 0, 0);
assert(idx == WHvX64RegisterIdtr);
vcxt.values[idx].Table.Base = env->idt.base;
vcxt.values[idx].Table.Limit = env->idt.limit;
idx += 1;
assert(idx == WHvX64RegisterGdtr);
vcxt.values[idx].Table.Base = env->gdt.base;
vcxt.values[idx].Table.Limit = env->gdt.limit;
idx += 1;
/* CR0, 2, 3, 4, 8 */
assert(whpx_register_names[idx] == WHvX64RegisterCr0);
vcxt.values[idx++].Reg64 = env->cr[0];
assert(whpx_register_names[idx] == WHvX64RegisterCr2);
vcxt.values[idx++].Reg64 = env->cr[2];
assert(whpx_register_names[idx] == WHvX64RegisterCr3);
vcxt.values[idx++].Reg64 = env->cr[3];
assert(whpx_register_names[idx] == WHvX64RegisterCr4);
vcxt.values[idx++].Reg64 = env->cr[4];
assert(whpx_register_names[idx] == WHvX64RegisterCr8);
vcxt.values[idx++].Reg64 = vcpu->tpr;
/* 8 Debug Registers - Skipped */
/* 16 XMM registers */
assert(whpx_register_names[idx] == WHvX64RegisterXmm0);
for (i = 0; i < 16; i += 1, idx += 1) {
vcxt.values[idx].Reg128.Low64 = env->xmm_regs[i].ZMM_Q(0);
vcxt.values[idx].Reg128.High64 = env->xmm_regs[i].ZMM_Q(1);
}
/* 8 FP registers */
assert(whpx_register_names[idx] == WHvX64RegisterFpMmx0);
for (i = 0; i < 8; i += 1, idx += 1) {
vcxt.values[idx].Fp.AsUINT128.Low64 = env->fpregs[i].mmx.MMX_Q(0);
/* vcxt.values[idx].Fp.AsUINT128.High64 =
env->fpregs[i].mmx.MMX_Q(1);
*/
}
/* FP control status register */
assert(whpx_register_names[idx] == WHvX64RegisterFpControlStatus);
vcxt.values[idx].FpControlStatus.FpControl = env->fpuc;
vcxt.values[idx].FpControlStatus.FpStatus =
(env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
vcxt.values[idx].FpControlStatus.FpTag = 0;
for (i = 0; i < 8; ++i) {
vcxt.values[idx].FpControlStatus.FpTag |= (!env->fptags[i]) << i;
}
vcxt.values[idx].FpControlStatus.Reserved = 0;
vcxt.values[idx].FpControlStatus.LastFpOp = env->fpop;
vcxt.values[idx].FpControlStatus.LastFpRip = env->fpip;
idx += 1;
/* XMM control status register */
assert(whpx_register_names[idx] == WHvX64RegisterXmmControlStatus);
vcxt.values[idx].XmmControlStatus.LastFpRdp = 0;
vcxt.values[idx].XmmControlStatus.XmmStatusControl = env->mxcsr;
vcxt.values[idx].XmmControlStatus.XmmStatusControlMask = 0x0000ffff;
idx += 1;
/* MSRs */
assert(whpx_register_names[idx] == WHvX64RegisterTsc);
vcxt.values[idx++].Reg64 = env->tsc;
assert(whpx_register_names[idx] == WHvX64RegisterEfer);
vcxt.values[idx++].Reg64 = env->efer;
#ifdef TARGET_X86_64
assert(whpx_register_names[idx] == WHvX64RegisterKernelGsBase);
vcxt.values[idx++].Reg64 = env->kernelgsbase;
#endif
assert(whpx_register_names[idx] == WHvX64RegisterApicBase);
vcxt.values[idx++].Reg64 = vcpu->apic_base;
/* WHvX64RegisterPat - Skipped */
assert(whpx_register_names[idx] == WHvX64RegisterSysenterCs);
vcxt.values[idx++].Reg64 = env->sysenter_cs;
assert(whpx_register_names[idx] == WHvX64RegisterSysenterEip);
vcxt.values[idx++].Reg64 = env->sysenter_eip;
assert(whpx_register_names[idx] == WHvX64RegisterSysenterEsp);
vcxt.values[idx++].Reg64 = env->sysenter_esp;
assert(whpx_register_names[idx] == WHvX64RegisterStar);
vcxt.values[idx++].Reg64 = env->star;
#ifdef TARGET_X86_64
assert(whpx_register_names[idx] == WHvX64RegisterLstar);
vcxt.values[idx++].Reg64 = env->lstar;
assert(whpx_register_names[idx] == WHvX64RegisterCstar);
vcxt.values[idx++].Reg64 = env->cstar;
assert(whpx_register_names[idx] == WHvX64RegisterSfmask);
vcxt.values[idx++].Reg64 = env->fmask;
#endif
/* Interrupt / Event Registers - Skipped */
assert(idx == RTL_NUMBER_OF(whpx_register_names));
hr = WHvSetVirtualProcessorRegisters(whpx->partition, cpu->cpu_index,
whpx_register_names,
RTL_NUMBER_OF(whpx_register_names),
&vcxt.values[0]);
if (FAILED(hr)) {
error_report("WHPX: Failed to set virtual processor context, hr=%08lx",
hr);
__debugbreak();
}
return;
}
static void whpx_get_registers(CPUState *cpu)
{
struct whpx_state *whpx = &whpx_global;
struct whpx_vcpu *vcpu = get_whpx_vcpu(cpu);
struct CPUX86State *env = (CPUArchState *)(cpu->env_ptr);
X86CPU *x86_cpu = X86_CPU(cpu);
struct whpx_register_set vcxt;
uint64_t tpr, apic_base;
HRESULT hr;
int idx = 0;
int i;
assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu));
hr = WHvGetVirtualProcessorRegisters(whpx->partition, cpu->cpu_index,
whpx_register_names,
RTL_NUMBER_OF(whpx_register_names),
&vcxt.values[0]);
if (FAILED(hr)) {
error_report("WHPX: Failed to get virtual processor context, hr=%08lx",
hr);
__debugbreak();
}
/* Indexes for first 16 registers match between HV and QEMU definitions */
for (idx = 0; idx < CPU_NB_REGS64; idx += 1) {
env->regs[idx] = vcxt.values[idx].Reg64;
}
/* Same goes for RIP and RFLAGS */
assert(whpx_register_names[idx] == WHvX64RegisterRip);
env->eip = vcxt.values[idx++].Reg64;
assert(whpx_register_names[idx] == WHvX64RegisterRflags);
env->eflags = vcxt.values[idx++].Reg64;
/* Translate 6+4 segment registers. HV and QEMU order matches */
assert(idx == WHvX64RegisterEs);
for (i = 0; i < 6; i += 1, idx += 1) {
env->segs[i] = whpx_seg_h2q(&vcxt.values[idx].Segment);
}
assert(idx == WHvX64RegisterLdtr);
env->ldt = whpx_seg_h2q(&vcxt.values[idx++].Segment);
assert(idx == WHvX64RegisterTr);
env->tr = whpx_seg_h2q(&vcxt.values[idx++].Segment);
assert(idx == WHvX64RegisterIdtr);
env->idt.base = vcxt.values[idx].Table.Base;
env->idt.limit = vcxt.values[idx].Table.Limit;
idx += 1;
assert(idx == WHvX64RegisterGdtr);
env->gdt.base = vcxt.values[idx].Table.Base;
env->gdt.limit = vcxt.values[idx].Table.Limit;
idx += 1;
/* CR0, 2, 3, 4, 8 */
assert(whpx_register_names[idx] == WHvX64RegisterCr0);
env->cr[0] = vcxt.values[idx++].Reg64;
assert(whpx_register_names[idx] == WHvX64RegisterCr2);
env->cr[2] = vcxt.values[idx++].Reg64;
assert(whpx_register_names[idx] == WHvX64RegisterCr3);
env->cr[3] = vcxt.values[idx++].Reg64;
assert(whpx_register_names[idx] == WHvX64RegisterCr4);
env->cr[4] = vcxt.values[idx++].Reg64;
assert(whpx_register_names[idx] == WHvX64RegisterCr8);
tpr = vcxt.values[idx++].Reg64;
if (tpr != vcpu->tpr) {
vcpu->tpr = tpr;
cpu_set_apic_tpr(x86_cpu->apic_state, tpr);
}
/* 8 Debug Registers - Skipped */
/* 16 XMM registers */
assert(whpx_register_names[idx] == WHvX64RegisterXmm0);
for (i = 0; i < 16; i += 1, idx += 1) {
env->xmm_regs[i].ZMM_Q(0) = vcxt.values[idx].Reg128.Low64;
env->xmm_regs[i].ZMM_Q(1) = vcxt.values[idx].Reg128.High64;
}
/* 8 FP registers */
assert(whpx_register_names[idx] == WHvX64RegisterFpMmx0);
for (i = 0; i < 8; i += 1, idx += 1) {
env->fpregs[i].mmx.MMX_Q(0) = vcxt.values[idx].Fp.AsUINT128.Low64;
/* env->fpregs[i].mmx.MMX_Q(1) =
vcxt.values[idx].Fp.AsUINT128.High64;
*/
}
/* FP control status register */
assert(whpx_register_names[idx] == WHvX64RegisterFpControlStatus);
env->fpuc = vcxt.values[idx].FpControlStatus.FpControl;
env->fpstt = (vcxt.values[idx].FpControlStatus.FpStatus >> 11) & 0x7;
env->fpus = vcxt.values[idx].FpControlStatus.FpStatus & ~0x3800;
for (i = 0; i < 8; ++i) {
env->fptags[i] = !((vcxt.values[idx].FpControlStatus.FpTag >> i) & 1);
}
env->fpop = vcxt.values[idx].FpControlStatus.LastFpOp;
env->fpip = vcxt.values[idx].FpControlStatus.LastFpRip;
idx += 1;
/* XMM control status register */
assert(whpx_register_names[idx] == WHvX64RegisterXmmControlStatus);
env->mxcsr = vcxt.values[idx].XmmControlStatus.XmmStatusControl;
idx += 1;
/* MSRs */
assert(whpx_register_names[idx] == WHvX64RegisterTsc);
env->tsc = vcxt.values[idx++].Reg64;
assert(whpx_register_names[idx] == WHvX64RegisterEfer);
env->efer = vcxt.values[idx++].Reg64;
#ifdef TARGET_X86_64
assert(whpx_register_names[idx] == WHvX64RegisterKernelGsBase);
env->kernelgsbase = vcxt.values[idx++].Reg64;
#endif
assert(whpx_register_names[idx] == WHvX64RegisterApicBase);
apic_base = vcxt.values[idx++].Reg64;
if (apic_base != vcpu->apic_base) {
vcpu->apic_base = apic_base;
cpu_set_apic_base(x86_cpu->apic_state, vcpu->apic_base);
}
/* WHvX64RegisterPat - Skipped */
assert(whpx_register_names[idx] == WHvX64RegisterSysenterCs);
env->sysenter_cs = vcxt.values[idx++].Reg64;;
assert(whpx_register_names[idx] == WHvX64RegisterSysenterEip);
env->sysenter_eip = vcxt.values[idx++].Reg64;
assert(whpx_register_names[idx] == WHvX64RegisterSysenterEsp);
env->sysenter_esp = vcxt.values[idx++].Reg64;
assert(whpx_register_names[idx] == WHvX64RegisterStar);
env->star = vcxt.values[idx++].Reg64;
#ifdef TARGET_X86_64
assert(whpx_register_names[idx] == WHvX64RegisterLstar);
env->lstar = vcxt.values[idx++].Reg64;
assert(whpx_register_names[idx] == WHvX64RegisterCstar);
env->cstar = vcxt.values[idx++].Reg64;
assert(whpx_register_names[idx] == WHvX64RegisterSfmask);
env->fmask = vcxt.values[idx++].Reg64;
#endif
/* Interrupt / Event Registers - Skipped */
assert(idx == RTL_NUMBER_OF(whpx_register_names));
return;
}
static HRESULT CALLBACK whpx_emu_ioport_callback(
void *ctx,
WHV_EMULATOR_IO_ACCESS_INFO *IoAccess)
{
MemTxAttrs attrs = { 0 };
address_space_rw(&address_space_io, IoAccess->Port, attrs,
(uint8_t *)&IoAccess->Data, IoAccess->AccessSize,
IoAccess->Direction);
return S_OK;
}
static HRESULT CALLBACK whpx_emu_memio_callback(
void *ctx,
WHV_EMULATOR_MEMORY_ACCESS_INFO *ma)
{
cpu_physical_memory_rw(ma->GpaAddress, ma->Data, ma->AccessSize,
ma->Direction);
return S_OK;
}
static HRESULT CALLBACK whpx_emu_getreg_callback(
void *ctx,
const WHV_REGISTER_NAME *RegisterNames,
UINT32 RegisterCount,
WHV_REGISTER_VALUE *RegisterValues)
{
HRESULT hr;
struct whpx_state *whpx = &whpx_global;
CPUState *cpu = (CPUState *)ctx;
hr = WHvGetVirtualProcessorRegisters(whpx->partition, cpu->cpu_index,
RegisterNames, RegisterCount,
RegisterValues);
if (FAILED(hr)) {
error_report("WHPX: Failed to get virtual processor registers,"
" hr=%08lx", hr);
__debugbreak();
}
return hr;
}
static HRESULT CALLBACK whpx_emu_setreg_callback(
void *ctx,
const WHV_REGISTER_NAME *RegisterNames,
UINT32 RegisterCount,
const WHV_REGISTER_VALUE *RegisterValues)
{
HRESULT hr;
struct whpx_state *whpx = &whpx_global;
CPUState *cpu = (CPUState *)ctx;
hr = WHvSetVirtualProcessorRegisters(whpx->partition, cpu->cpu_index,
RegisterNames, RegisterCount,
RegisterValues);
if (FAILED(hr)) {
error_report("WHPX: Failed to set virtual processor registers,"
" hr=%08lx", hr);
__debugbreak();
}
/*
* The emulator just successfully wrote the register state. We clear the
* dirty state so we avoid the double write on resume of the VP.
*/
cpu->vcpu_dirty = false;
return hr;
}
static HRESULT CALLBACK whpx_emu_translate_callback(
void *ctx,
WHV_GUEST_VIRTUAL_ADDRESS Gva,
WHV_TRANSLATE_GVA_FLAGS TranslateFlags,
WHV_TRANSLATE_GVA_RESULT_CODE *TranslationResult,
WHV_GUEST_PHYSICAL_ADDRESS *Gpa)
{
HRESULT hr;
struct whpx_state *whpx = &whpx_global;
CPUState *cpu = (CPUState *)ctx;
WHV_TRANSLATE_GVA_RESULT res;
hr = WHvTranslateGva(whpx->partition, cpu->cpu_index,
Gva, TranslateFlags, &res, Gpa);
if (FAILED(hr)) {
error_report("WHPX: Failed to translate GVA, hr=%08lx", hr);
__debugbreak();
} else {
*TranslationResult = res.ResultCode;
}
return hr;
}
static const WHV_EMULATOR_CALLBACKS whpx_emu_callbacks = {
.WHvEmulatorIoPortCallback = whpx_emu_ioport_callback,
.WHvEmulatorMemoryCallback = whpx_emu_memio_callback,
.WHvEmulatorGetVirtualProcessorRegisters = whpx_emu_getreg_callback,
.WHvEmulatorSetVirtualProcessorRegisters = whpx_emu_setreg_callback,
.WHvEmulatorTranslateGvaPage = whpx_emu_translate_callback,
};
static int whpx_handle_mmio(CPUState *cpu, WHV_MEMORY_ACCESS_CONTEXT *ctx)
{
HRESULT hr;
struct whpx_vcpu *vcpu = get_whpx_vcpu(cpu);
WHV_EMULATOR_STATUS emu_status;
hr = WHvEmulatorTryMmioEmulation(vcpu->emulator, cpu, ctx, &emu_status);
if (FAILED(hr)) {
__debugbreak();
error_report("WHPX: Failed to parse MMIO access, hr=%08lx", hr);
return -1;
}
if (!emu_status.EmulationSuccessful) {
__debugbreak();
error_report("WHPX: Failed to emulate MMIO access");
return -1;
}
return 0;
}
static int whpx_handle_portio(CPUState *cpu,
WHV_X64_IO_PORT_ACCESS_CONTEXT *ctx)
{
HRESULT hr;
struct whpx_vcpu *vcpu = get_whpx_vcpu(cpu);
WHV_EMULATOR_STATUS emu_status;
hr = WHvEmulatorTryIoEmulation(vcpu->emulator, cpu, ctx, &emu_status);
if (FAILED(hr)) {
__debugbreak();
error_report("WHPX: Failed to parse PortIO access, hr=%08lx", hr);
return -1;
}
if (!emu_status.EmulationSuccessful) {
__debugbreak();
error_report("WHPX: Failed to emulate PortMMIO access");
return -1;
}
return 0;
}
static int whpx_handle_halt(CPUState *cpu)
{
struct CPUX86State *env = (CPUArchState *)(cpu->env_ptr);
int ret = 0;
qemu_mutex_lock_iothread();
if (!((cpu->interrupt_request & CPU_INTERRUPT_HARD) &&
(env->eflags & IF_MASK)) &&
!(cpu->interrupt_request & CPU_INTERRUPT_NMI)) {
cpu->exception_index = EXCP_HLT;
cpu->halted = true;
ret = 1;
}
qemu_mutex_unlock_iothread();
return ret;
}
static void whpx_vcpu_pre_run(CPUState *cpu)
{
HRESULT hr;
struct whpx_state *whpx = &whpx_global;
struct whpx_vcpu *vcpu = get_whpx_vcpu(cpu);
struct CPUX86State *env = (CPUArchState *)(cpu->env_ptr);
X86CPU *x86_cpu = X86_CPU(cpu);
int irq;
WHV_X64_PENDING_INTERRUPTION_REGISTER new_int = {0};
UINT32 reg_count = 0;
WHV_REGISTER_VALUE reg_values[3] = {0};
WHV_REGISTER_NAME reg_names[3];
qemu_mutex_lock_iothread();
/* Inject NMI */
if (!vcpu->interrupt_in_flight.InterruptionPending &&
cpu->interrupt_request & (CPU_INTERRUPT_NMI | CPU_INTERRUPT_SMI)) {
if (cpu->interrupt_request & CPU_INTERRUPT_NMI) {
cpu->interrupt_request &= ~CPU_INTERRUPT_NMI;
vcpu->interruptable = false;
new_int.InterruptionType = WHvX64PendingNmi;
new_int.InterruptionPending = 1;
new_int.InterruptionVector = 2;
}
if (cpu->interrupt_request & CPU_INTERRUPT_SMI) {
qemu_mutex_lock_iothread();
cpu->interrupt_request &= ~CPU_INTERRUPT_SMI;
__debugbreak();
qemu_mutex_unlock_iothread();
}
}
/*
* Force the VCPU out of its inner loop to process any INIT requests or
* commit pending TPR access.
*/
if (cpu->interrupt_request & (CPU_INTERRUPT_INIT | CPU_INTERRUPT_TPR)) {
if ((cpu->interrupt_request & CPU_INTERRUPT_INIT) &&
!(env->hflags & HF_SMM_MASK)) {
cpu->exit_request = 1;
}
if (cpu->interrupt_request & CPU_INTERRUPT_TPR) {
cpu->exit_request = 1;
}
}
/* Get pending hard interruption or replay one that was overwritten */
if (!vcpu->interrupt_in_flight.InterruptionPending &&
vcpu->interruptable && (env->eflags & IF_MASK)) {
assert(!new_int.InterruptionPending);
if (cpu->interrupt_request & CPU_INTERRUPT_HARD) {
cpu->interrupt_request &= ~CPU_INTERRUPT_HARD;
irq = cpu_get_pic_interrupt(env);
if (irq >= 0) {
new_int.InterruptionType = WHvX64PendingInterrupt;
new_int.InterruptionPending = 1;
new_int.InterruptionVector = irq;
}
}
}
/* Setup interrupt state if new one was prepared */
if (new_int.InterruptionPending) {
reg_values[reg_count].PendingInterruption = new_int;
reg_names[reg_count] = WHvRegisterPendingInterruption;
reg_count += 1;
}
/* Sync the TPR to the CR8 if was modified during the intercept */
reg_values[reg_count].Reg64 = cpu_get_apic_tpr(x86_cpu->apic_state);
if (reg_values[reg_count].Reg64 != vcpu->tpr) {
vcpu->tpr = reg_values[reg_count].Reg64;
cpu->exit_request = 1;
reg_names[reg_count] = WHvX64RegisterCr8;
reg_count += 1;
}
/* Update the state of the interrupt delivery notification */
if (cpu->interrupt_request & CPU_INTERRUPT_HARD) {
reg_values[reg_count].DeliverabilityNotifications.InterruptNotification
= 1;
if (vcpu->window_registered != 1) {
vcpu->window_registered = 1;
}
reg_names[reg_count] = WHvX64RegisterDeliverabilityNotifications;
reg_count += 1;
}
qemu_mutex_unlock_iothread();
if (reg_count) {
hr = WHvSetVirtualProcessorRegisters(whpx->partition, cpu->cpu_index,
reg_names, reg_count, reg_values);
if (FAILED(hr)) {
error_report("WHPX: Failed to set interrupt state registers,"
" hr=%08lx", hr);
__debugbreak();
}
}
return;
}
static void whpx_vcpu_post_run(CPUState *cpu)
{
HRESULT hr;
struct whpx_state *whpx = &whpx_global;
struct whpx_vcpu *vcpu = get_whpx_vcpu(cpu);
struct CPUX86State *env = (CPUArchState *)(cpu->env_ptr);
X86CPU *x86_cpu = X86_CPU(cpu);
WHV_REGISTER_VALUE reg_values[4];
const WHV_REGISTER_NAME reg_names[4] = {
WHvX64RegisterRflags,
WHvX64RegisterCr8,
WHvRegisterPendingInterruption,
WHvRegisterInterruptState,
};
hr = WHvGetVirtualProcessorRegisters(whpx->partition, cpu->cpu_index,
reg_names, 4, reg_values);
if (FAILED(hr)) {
error_report("WHPX: Failed to get interrupt state regusters,"
" hr=%08lx", hr);
__debugbreak();
vcpu->interruptable = false;
return;
}
assert(reg_names[0] == WHvX64RegisterRflags);
env->eflags = reg_values[0].Reg64;
assert(reg_names[1] == WHvX64RegisterCr8);
if (vcpu->tpr != reg_values[1].Reg64) {
vcpu->tpr = reg_values[1].Reg64;
qemu_mutex_lock_iothread();
cpu_set_apic_tpr(x86_cpu->apic_state, vcpu->tpr);
qemu_mutex_unlock_iothread();
}
assert(reg_names[2] == WHvRegisterPendingInterruption);
vcpu->interrupt_in_flight = reg_values[2].PendingInterruption;
assert(reg_names[3] == WHvRegisterInterruptState);
vcpu->interruptable = !reg_values[3].InterruptState.InterruptShadow;
return;
}
static void whpx_vcpu_process_async_events(CPUState *cpu)
{
struct CPUX86State *env = (CPUArchState *)(cpu->env_ptr);
X86CPU *x86_cpu = X86_CPU(cpu);
struct whpx_vcpu *vcpu = get_whpx_vcpu(cpu);
if ((cpu->interrupt_request & CPU_INTERRUPT_INIT) &&
!(env->hflags & HF_SMM_MASK)) {
do_cpu_init(x86_cpu);
cpu->vcpu_dirty = true;
vcpu->interruptable = true;
}
if (cpu->interrupt_request & CPU_INTERRUPT_POLL) {
cpu->interrupt_request &= ~CPU_INTERRUPT_POLL;
apic_poll_irq(x86_cpu->apic_state);
}
if (((cpu->interrupt_request & CPU_INTERRUPT_HARD) &&
(env->eflags & IF_MASK)) ||
(cpu->interrupt_request & CPU_INTERRUPT_NMI)) {
cpu->halted = false;
}
if (cpu->interrupt_request & CPU_INTERRUPT_SIPI) {
if (!cpu->vcpu_dirty) {
whpx_get_registers(cpu);
}
do_cpu_sipi(x86_cpu);
}
if (cpu->interrupt_request & CPU_INTERRUPT_TPR) {
cpu->interrupt_request &= ~CPU_INTERRUPT_TPR;
if (!cpu->vcpu_dirty) {
whpx_get_registers(cpu);
}
apic_handle_tpr_access_report(x86_cpu->apic_state, env->eip,
env->tpr_access_type);
}
return;
}
static int whpx_vcpu_run(CPUState *cpu)
{
HRESULT hr;
struct whpx_state *whpx = &whpx_global;
struct whpx_vcpu *vcpu = get_whpx_vcpu(cpu);
int ret;
whpx_vcpu_process_async_events(cpu);
if (cpu->halted) {
cpu->exception_index = EXCP_HLT;
atomic_set(&cpu->exit_request, false);
return 0;
}
qemu_mutex_unlock_iothread();
cpu_exec_start(cpu);
do {
if (cpu->vcpu_dirty) {
whpx_set_registers(cpu);
cpu->vcpu_dirty = false;
}
whpx_vcpu_pre_run(cpu);
if (atomic_read(&cpu->exit_request)) {
whpx_vcpu_kick(cpu);
}
for (;;) {
hr = WHvRunVirtualProcessor(whpx->partition, cpu->cpu_index,
&vcpu->exit_ctx, whpx->exit_ctx_size);
if (SUCCEEDED(hr) && (vcpu->exit_ctx.ExitReason ==
WHvRunVpExitReasonAlerted)) {
WHvCancelRunVirtualProcessor(whpx->partition, cpu->cpu_index,
0);
} else {
break;
}
}
if (FAILED(hr)) {
error_report("WHPX: Failed to exec a virtual processor,"
" hr=%08lx", hr);
ret = -1;
break;
}
whpx_vcpu_post_run(cpu);
switch (vcpu->exit_ctx.ExitReason) {
case WHvRunVpExitReasonMemoryAccess:
ret = whpx_handle_mmio(cpu, &vcpu->exit_ctx.MemoryAccess);
break;
case WHvRunVpExitReasonX64IoPortAccess:
ret = whpx_handle_portio(cpu, &vcpu->exit_ctx.IoPortAccess);
break;
case WHvRunVpExitReasonX64InterruptWindow:
vcpu->window_registered = 0;
break;
case WHvRunVpExitReasonX64Halt:
ret = whpx_handle_halt(cpu);
break;
case WHvRunVpExitReasonCanceled:
cpu->exception_index = EXCP_INTERRUPT;
ret = 1;
break;
case WHvRunVpExitReasonNone:
case WHvRunVpExitReasonUnrecoverableException:
case WHvRunVpExitReasonInvalidVpRegisterValue:
case WHvRunVpExitReasonUnsupportedFeature:
case WHvRunVpExitReasonX64MsrAccess:
case WHvRunVpExitReasonX64Cpuid:
case WHvRunVpExitReasonException:
case WHvRunVpExitReasonAlerted:
default:
error_report("WHPX: Unexpected VP exit code %d",
vcpu->exit_ctx.ExitReason);
whpx_get_registers(cpu);
qemu_mutex_lock_iothread();
qemu_system_guest_panicked(cpu_get_crash_info(cpu));
qemu_mutex_unlock_iothread();
break;
}
} while (!ret);
cpu_exec_end(cpu);
qemu_mutex_lock_iothread();
current_cpu = cpu;
atomic_set(&cpu->exit_request, false);
return ret < 0;
}
static void do_whpx_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg)
{
whpx_get_registers(cpu);
cpu->vcpu_dirty = true;
}
static void do_whpx_cpu_synchronize_post_reset(CPUState *cpu,
run_on_cpu_data arg)
{
whpx_set_registers(cpu);
cpu->vcpu_dirty = false;
}
static void do_whpx_cpu_synchronize_post_init(CPUState *cpu,
run_on_cpu_data arg)
{
whpx_set_registers(cpu);
cpu->vcpu_dirty = false;
}
static void do_whpx_cpu_synchronize_pre_loadvm(CPUState *cpu,
run_on_cpu_data arg)
{
cpu->vcpu_dirty = true;
}
/*
* CPU support.
*/
void whpx_cpu_synchronize_state(CPUState *cpu)
{
if (!cpu->vcpu_dirty) {
run_on_cpu(cpu, do_whpx_cpu_synchronize_state, RUN_ON_CPU_NULL);
}
}
void whpx_cpu_synchronize_post_reset(CPUState *cpu)
{
run_on_cpu(cpu, do_whpx_cpu_synchronize_post_reset, RUN_ON_CPU_NULL);
}
void whpx_cpu_synchronize_post_init(CPUState *cpu)
{
run_on_cpu(cpu, do_whpx_cpu_synchronize_post_init, RUN_ON_CPU_NULL);
}
void whpx_cpu_synchronize_pre_loadvm(CPUState *cpu)
{
run_on_cpu(cpu, do_whpx_cpu_synchronize_pre_loadvm, RUN_ON_CPU_NULL);
}
/*
* Vcpu support.
*/
static Error *whpx_migration_blocker;
int whpx_init_vcpu(CPUState *cpu)
{
HRESULT hr;
struct whpx_state *whpx = &whpx_global;
struct whpx_vcpu *vcpu;
Error *local_error = NULL;
/* Add migration blockers for all unsupported features of the
* Windows Hypervisor Platform
*/
if (whpx_migration_blocker == NULL) {
error_setg(&whpx_migration_blocker,
"State blocked due to non-migratable CPUID feature support,"
"dirty memory tracking support, and XSAVE/XRSTOR support");
(void)migrate_add_blocker(whpx_migration_blocker, &local_error);
if (local_error) {
error_report_err(local_error);
error_free(whpx_migration_blocker);
migrate_del_blocker(whpx_migration_blocker);
return -EINVAL;
}
}
vcpu = g_malloc0(FIELD_OFFSET(struct whpx_vcpu, exit_ctx) +
whpx->exit_ctx_size);
if (!vcpu) {
error_report("WHPX: Failed to allocte VCPU context.");
return -ENOMEM;
}
hr = WHvEmulatorCreateEmulator(whpx_emu_callbacks, &vcpu->emulator);
if (FAILED(hr)) {
error_report("WHPX: Failed to setup instruction completion support,"
" hr=%08lx", hr);
g_free(vcpu);
return -EINVAL;
}
hr = WHvCreateVirtualProcessor(whpx->partition, cpu->cpu_index, 0);
if (FAILED(hr)) {
error_report("WHPX: Failed to create a virtual processor,"
" hr=%08lx", hr);
WHvEmulatorDestroyEmulator(vcpu->emulator);
g_free(vcpu);
return -EINVAL;
}
vcpu->interruptable = true;
cpu->vcpu_dirty = true;
cpu->hax_vcpu = (struct hax_vcpu_state *)vcpu;
return 0;
}
int whpx_vcpu_exec(CPUState *cpu)
{
int ret;
int fatal;
for (;;) {
if (cpu->exception_index >= EXCP_INTERRUPT) {
ret = cpu->exception_index;
cpu->exception_index = -1;
break;
}
fatal = whpx_vcpu_run(cpu);
if (fatal) {
error_report("WHPX: Failed to exec a virtual processor");
abort();
}
}
return ret;
}
void whpx_destroy_vcpu(CPUState *cpu)
{
struct whpx_state *whpx = &whpx_global;
struct whpx_vcpu *vcpu = get_whpx_vcpu(cpu);
WHvDeleteVirtualProcessor(whpx->partition, cpu->cpu_index);
WHvEmulatorDestroyEmulator(vcpu->emulator);
g_free(cpu->hax_vcpu);
return;
}
void whpx_vcpu_kick(CPUState *cpu)
{
struct whpx_state *whpx = &whpx_global;
WHvCancelRunVirtualProcessor(whpx->partition, cpu->cpu_index, 0);
}
/*
* Memory support.
*/
static void whpx_update_mapping(hwaddr start_pa, ram_addr_t size,
void *host_va, int add, int rom,
const char *name)
{
struct whpx_state *whpx = &whpx_global;
HRESULT hr;
/*
if (add) {
printf("WHPX: ADD PA:%p Size:%p, Host:%p, %s, '%s'\n",
(void*)start_pa, (void*)size, host_va,
(rom ? "ROM" : "RAM"), name);
} else {
printf("WHPX: DEL PA:%p Size:%p, Host:%p, '%s'\n",
(void*)start_pa, (void*)size, host_va, name);
}
*/
if (add) {
hr = WHvMapGpaRange(whpx->partition,
host_va,
start_pa,
size,
(WHvMapGpaRangeFlagRead |
WHvMapGpaRangeFlagExecute |
(rom ? 0 : WHvMapGpaRangeFlagWrite)));
} else {
hr = WHvUnmapGpaRange(whpx->partition,
start_pa,
size);
}
if (FAILED(hr)) {
error_report("WHPX: Failed to %s GPA range '%s' PA:%p, Size:%p bytes,"
" Host:%p, hr=%08lx",
(add ? "MAP" : "UNMAP"), name,
(void *)start_pa, (void *)size, host_va, hr);
}
}
static void whpx_process_section(MemoryRegionSection *section, int add)
{
MemoryRegion *mr = section->mr;
hwaddr start_pa = section->offset_within_address_space;
ram_addr_t size = int128_get64(section->size);
unsigned int delta;
uint64_t host_va;
if (!memory_region_is_ram(mr)) {
return;
}
delta = qemu_real_host_page_size - (start_pa & ~qemu_real_host_page_mask);
delta &= ~qemu_real_host_page_mask;
if (delta > size) {
return;
}
start_pa += delta;
size -= delta;
size &= qemu_real_host_page_mask;
if (!size || (start_pa & ~qemu_real_host_page_mask)) {
return;
}
host_va = (uintptr_t)memory_region_get_ram_ptr(mr)
+ section->offset_within_region + delta;
whpx_update_mapping(start_pa, size, (void *)host_va, add,
memory_region_is_rom(mr), mr->name);
}
static void whpx_region_add(MemoryListener *listener,
MemoryRegionSection *section)
{
memory_region_ref(section->mr);
whpx_process_section(section, 1);
}
static void whpx_region_del(MemoryListener *listener,
MemoryRegionSection *section)
{
whpx_process_section(section, 0);
memory_region_unref(section->mr);
}
static void whpx_transaction_begin(MemoryListener *listener)
{
}
static void whpx_transaction_commit(MemoryListener *listener)
{
}
static void whpx_log_sync(MemoryListener *listener,
MemoryRegionSection *section)
{
MemoryRegion *mr = section->mr;
if (!memory_region_is_ram(mr)) {
return;
}
memory_region_set_dirty(mr, 0, int128_get64(section->size));
}
static MemoryListener whpx_memory_listener = {
.begin = whpx_transaction_begin,
.commit = whpx_transaction_commit,
.region_add = whpx_region_add,
.region_del = whpx_region_del,
.log_sync = whpx_log_sync,
.priority = 10,
};
static void whpx_memory_init(void)
{
memory_listener_register(&whpx_memory_listener, &address_space_memory);
}
static void whpx_handle_interrupt(CPUState *cpu, int mask)
{
cpu->interrupt_request |= mask;
if (!qemu_cpu_is_self(cpu)) {
qemu_cpu_kick(cpu);
}
}
/*
* Partition support
*/
static int whpx_accel_init(MachineState *ms)
{
struct whpx_state *whpx;
int ret;
HRESULT hr;
WHV_CAPABILITY whpx_cap;
WHV_PARTITION_PROPERTY prop;
whpx = &whpx_global;
memset(whpx, 0, sizeof(struct whpx_state));
whpx->mem_quota = ms->ram_size;
hr = WHvGetCapability(WHvCapabilityCodeHypervisorPresent, &whpx_cap,
sizeof(whpx_cap));
if (FAILED(hr) || !whpx_cap.HypervisorPresent) {
error_report("WHPX: No accelerator found, hr=%08lx", hr);
ret = -ENOSPC;
goto error;
}
hr = WHvCreatePartition(&whpx->partition);
if (FAILED(hr)) {
error_report("WHPX: Failed to create partition, hr=%08lx", hr);
ret = -EINVAL;
goto error;
}
memset(&prop, 0, sizeof(WHV_PARTITION_PROPERTY));
prop.PropertyCode = WHvPartitionPropertyCodeProcessorCount;
prop.ProcessorCount = smp_cpus;
hr = WHvSetPartitionProperty(whpx->partition,
&prop,
sizeof(WHV_PARTITION_PROPERTY));
if (FAILED(hr)) {
error_report("WHPX: Failed to set partition core count to %d,"
" hr=%08lx", smp_cores, hr);
ret = -EINVAL;
goto error;
}
hr = WHvSetupPartition(whpx->partition);
if (FAILED(hr)) {
error_report("WHPX: Failed to setup partition, hr=%08lx", hr);
ret = -EINVAL;
goto error;
}
whpx->exit_ctx_size = WHvGetRunExitContextSize();
assert(whpx->exit_ctx_size);
whpx_memory_init();
cpu_interrupt_handler = whpx_handle_interrupt;
printf("Windows Hypervisor Platform accelerator is operational\n");
return 0;
error:
if (NULL != whpx->partition) {
WHvDeletePartition(whpx->partition);
whpx->partition = NULL;
}
return ret;
}
int whpx_enabled(void)
{
return whpx_allowed;
}
static void whpx_accel_class_init(ObjectClass *oc, void *data)
{
AccelClass *ac = ACCEL_CLASS(oc);
ac->name = "WHPX";
ac->init_machine = whpx_accel_init;
ac->allowed = &whpx_allowed;
}
static const TypeInfo whpx_accel_type = {
.name = ACCEL_CLASS_NAME("whpx"),
.parent = TYPE_ACCEL,
.class_init = whpx_accel_class_init,
};
static void whpx_type_init(void)
{
type_register_static(&whpx_accel_type);
}
type_init(whpx_type_init);
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