diff options
Diffstat (limited to 'target/i386/whpx-all.c')
| -rw-r--r-- | target/i386/whpx-all.c | 162 |
1 files changed, 119 insertions, 43 deletions
diff --git a/target/i386/whpx-all.c b/target/i386/whpx-all.c index 683d49d217..c78baac6df 100644 --- a/target/i386/whpx-all.c +++ b/target/i386/whpx-all.c @@ -114,7 +114,6 @@ static const WHV_REGISTER_NAME whpx_register_names[] = { WHvX64RegisterXmmControlStatus, /* X64 MSRs */ - WHvX64RegisterTsc, WHvX64RegisterEfer, #ifdef TARGET_X86_64 WHvX64RegisterKernelGsBase, @@ -215,7 +214,44 @@ static SegmentCache whpx_seg_h2q(const WHV_X64_SEGMENT_REGISTER *hs) return qs; } -static void whpx_set_registers(CPUState *cpu) +static int whpx_set_tsc(CPUState *cpu) +{ + struct CPUX86State *env = (CPUArchState *)(cpu->env_ptr); + WHV_REGISTER_NAME tsc_reg = WHvX64RegisterTsc; + WHV_REGISTER_VALUE tsc_val; + HRESULT hr; + struct whpx_state *whpx = &whpx_global; + + /* + * Suspend the partition prior to setting the TSC to reduce the variance + * in TSC across vCPUs. When the first vCPU runs post suspend, the + * partition is automatically resumed. + */ + if (whp_dispatch.WHvSuspendPartitionTime) { + + /* + * Unable to suspend partition while setting TSC is not a fatal + * error. It just increases the likelihood of TSC variance between + * vCPUs and some guest OS are able to handle that just fine. + */ + hr = whp_dispatch.WHvSuspendPartitionTime(whpx->partition); + if (FAILED(hr)) { + warn_report("WHPX: Failed to suspend partition, hr=%08lx", hr); + } + } + + tsc_val.Reg64 = env->tsc; + hr = whp_dispatch.WHvSetVirtualProcessorRegisters( + whpx->partition, cpu->cpu_index, &tsc_reg, 1, &tsc_val); + if (FAILED(hr)) { + error_report("WHPX: Failed to set TSC, hr=%08lx", hr); + return -1; + } + + return 0; +} + +static void whpx_set_registers(CPUState *cpu, int level) { struct whpx_state *whpx = &whpx_global; struct whpx_vcpu *vcpu = get_whpx_vcpu(cpu); @@ -230,6 +266,14 @@ static void whpx_set_registers(CPUState *cpu) assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu)); + /* + * Following MSRs have side effects on the guest or are too heavy for + * runtime. Limit them to full state update. + */ + if (level >= WHPX_SET_RESET_STATE) { + whpx_set_tsc(cpu); + } + memset(&vcxt, 0, sizeof(struct whpx_register_set)); v86 = (env->eflags & VM_MASK); @@ -330,8 +374,6 @@ static void whpx_set_registers(CPUState *cpu) 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 @@ -379,6 +421,25 @@ static void whpx_set_registers(CPUState *cpu) return; } +static int whpx_get_tsc(CPUState *cpu) +{ + struct CPUX86State *env = (CPUArchState *)(cpu->env_ptr); + WHV_REGISTER_NAME tsc_reg = WHvX64RegisterTsc; + WHV_REGISTER_VALUE tsc_val; + HRESULT hr; + struct whpx_state *whpx = &whpx_global; + + hr = whp_dispatch.WHvGetVirtualProcessorRegisters( + whpx->partition, cpu->cpu_index, &tsc_reg, 1, &tsc_val); + if (FAILED(hr)) { + error_report("WHPX: Failed to get TSC, hr=%08lx", hr); + return -1; + } + + env->tsc = tsc_val.Reg64; + return 0; +} + static void whpx_get_registers(CPUState *cpu) { struct whpx_state *whpx = &whpx_global; @@ -394,6 +455,11 @@ static void whpx_get_registers(CPUState *cpu) assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu)); + if (!env->tsc_valid) { + whpx_get_tsc(cpu); + env->tsc_valid = !runstate_is_running(); + } + hr = whp_dispatch.WHvGetVirtualProcessorRegisters( whpx->partition, cpu->cpu_index, whpx_register_names, @@ -492,8 +558,6 @@ static void whpx_get_registers(CPUState *cpu) 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 @@ -841,9 +905,8 @@ static void whpx_vcpu_process_async_events(CPUState *cpu) if ((cpu->interrupt_request & CPU_INTERRUPT_INIT) && !(env->hflags & HF_SMM_MASK)) { - + whpx_cpu_synchronize_state(cpu); do_cpu_init(x86_cpu); - cpu->vcpu_dirty = true; vcpu->interruptable = true; } @@ -859,17 +922,13 @@ static void whpx_vcpu_process_async_events(CPUState *cpu) } if (cpu->interrupt_request & CPU_INTERRUPT_SIPI) { - if (!cpu->vcpu_dirty) { - whpx_get_registers(cpu); - } + whpx_cpu_synchronize_state(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); - } + whpx_cpu_synchronize_state(cpu); apic_handle_tpr_access_report(x86_cpu->apic_state, env->eip, env->tpr_access_type); } @@ -896,7 +955,7 @@ static int whpx_vcpu_run(CPUState *cpu) do { if (cpu->vcpu_dirty) { - whpx_set_registers(cpu); + whpx_set_registers(cpu, WHPX_SET_RUNTIME_STATE); cpu->vcpu_dirty = false; } @@ -980,38 +1039,32 @@ static int whpx_vcpu_run(CPUState *cpu) WHV_REGISTER_VALUE reg_values[5]; WHV_REGISTER_NAME reg_names[5]; UINT32 reg_count = 5; - UINT64 rip, rax, rcx, rdx, rbx; + UINT64 cpuid_fn, rip = 0, rax = 0, rcx = 0, rdx = 0, rbx = 0; + X86CPU *x86_cpu = X86_CPU(cpu); + CPUX86State *env = &x86_cpu->env; memset(reg_values, 0, sizeof(reg_values)); rip = vcpu->exit_ctx.VpContext.Rip + vcpu->exit_ctx.VpContext.InstructionLength; - switch (vcpu->exit_ctx.CpuidAccess.Rax) { - case 1: - rax = vcpu->exit_ctx.CpuidAccess.DefaultResultRax; - /* Advertise that we are running on a hypervisor */ - rcx = - vcpu->exit_ctx.CpuidAccess.DefaultResultRcx | - CPUID_EXT_HYPERVISOR; - - rdx = vcpu->exit_ctx.CpuidAccess.DefaultResultRdx; - rbx = vcpu->exit_ctx.CpuidAccess.DefaultResultRbx; - break; + cpuid_fn = vcpu->exit_ctx.CpuidAccess.Rax; + + /* + * Ideally, these should be supplied to the hypervisor during VCPU + * initialization and it should be able to satisfy this request. + * But, currently, WHPX doesn't support setting CPUID values in the + * hypervisor once the partition has been setup, which is too late + * since VCPUs are realized later. For now, use the values from + * QEMU to satisfy these requests, until WHPX adds support for + * being able to set these values in the hypervisor at runtime. + */ + cpu_x86_cpuid(env, cpuid_fn, 0, (UINT32 *)&rax, (UINT32 *)&rbx, + (UINT32 *)&rcx, (UINT32 *)&rdx); + switch (cpuid_fn) { case 0x80000001: - rax = vcpu->exit_ctx.CpuidAccess.DefaultResultRax; /* Remove any support of OSVW */ - rcx = - vcpu->exit_ctx.CpuidAccess.DefaultResultRcx & - ~CPUID_EXT3_OSVW; - - rdx = vcpu->exit_ctx.CpuidAccess.DefaultResultRdx; - rbx = vcpu->exit_ctx.CpuidAccess.DefaultResultRbx; + rcx &= ~CPUID_EXT3_OSVW; break; - default: - rax = vcpu->exit_ctx.CpuidAccess.DefaultResultRax; - rcx = vcpu->exit_ctx.CpuidAccess.DefaultResultRcx; - rdx = vcpu->exit_ctx.CpuidAccess.DefaultResultRdx; - rbx = vcpu->exit_ctx.CpuidAccess.DefaultResultRbx; } reg_names[0] = WHvX64RegisterRip; @@ -1067,21 +1120,23 @@ static int whpx_vcpu_run(CPUState *cpu) static void do_whpx_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg) { - whpx_get_registers(cpu); - cpu->vcpu_dirty = true; + if (!cpu->vcpu_dirty) { + 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); + whpx_set_registers(cpu, WHPX_SET_RESET_STATE); cpu->vcpu_dirty = false; } static void do_whpx_cpu_synchronize_post_init(CPUState *cpu, run_on_cpu_data arg) { - whpx_set_registers(cpu); + whpx_set_registers(cpu, WHPX_SET_FULL_STATE); cpu->vcpu_dirty = false; } @@ -1123,6 +1178,15 @@ void whpx_cpu_synchronize_pre_loadvm(CPUState *cpu) static Error *whpx_migration_blocker; +static void whpx_cpu_update_state(void *opaque, int running, RunState state) +{ + CPUX86State *env = opaque; + + if (running) { + env->tsc_valid = false; + } +} + int whpx_init_vcpu(CPUState *cpu) { HRESULT hr; @@ -1178,6 +1242,7 @@ int whpx_init_vcpu(CPUState *cpu) cpu->vcpu_dirty = true; cpu->hax_vcpu = (struct hax_vcpu_state *)vcpu; + qemu_add_vm_change_state_handler(whpx_cpu_update_state, cpu->env_ptr); return 0; } @@ -1367,6 +1432,10 @@ static bool load_whp_dispatch_fns(HMODULE *handle, #define WINHV_PLATFORM_DLL "WinHvPlatform.dll" #define WINHV_EMULATION_DLL "WinHvEmulation.dll" + #define WHP_LOAD_FIELD_OPTIONAL(return_type, function_name, signature) \ + whp_dispatch.function_name = \ + (function_name ## _t)GetProcAddress(hLib, #function_name); \ + #define WHP_LOAD_FIELD(return_type, function_name, signature) \ whp_dispatch.function_name = \ (function_name ## _t)GetProcAddress(hLib, #function_name); \ @@ -1394,6 +1463,11 @@ static bool load_whp_dispatch_fns(HMODULE *handle, WHP_LOAD_LIB(WINHV_EMULATION_DLL, hLib) LIST_WINHVEMULATION_FUNCTIONS(WHP_LOAD_FIELD) break; + + case WINHV_PLATFORM_FNS_SUPPLEMENTAL: + WHP_LOAD_LIB(WINHV_PLATFORM_DLL, hLib) + LIST_WINHVPLATFORM_FUNCTIONS_SUPPLEMENTAL(WHP_LOAD_FIELD_OPTIONAL) + break; } *handle = hLib; @@ -1554,6 +1628,8 @@ bool init_whp_dispatch(void) goto error; } + assert(load_whp_dispatch_fns(&hWinHvPlatform, + WINHV_PLATFORM_FNS_SUPPLEMENTAL)); whp_dispatch_initialized = true; return true; |