diff options
Diffstat (limited to 'target/i386/kvm.c')
| -rw-r--r-- | target/i386/kvm.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/target/i386/kvm.c b/target/i386/kvm.c index ebb2d23aa4..9313602d3d 100644 --- a/target/i386/kvm.c +++ b/target/i386/kvm.c @@ -85,6 +85,7 @@ static bool has_msr_hv_hypercall; static bool has_msr_hv_crash; static bool has_msr_hv_reset; static bool has_msr_hv_vpindex; +static bool hv_vpindex_settable; static bool has_msr_hv_runtime; static bool has_msr_hv_synic; static bool has_msr_hv_stimer; @@ -162,6 +163,11 @@ bool kvm_enable_x2apic(void) has_x2apic_api); } +bool kvm_hv_vpindex_settable(void) +{ + return hv_vpindex_settable; +} + static int kvm_get_tsc(CPUState *cs) { X86CPU *cpu = X86_CPU(cs); @@ -745,6 +751,37 @@ static int hyperv_handle_properties(CPUState *cs) return 0; } +static int hyperv_init_vcpu(X86CPU *cpu) +{ + if (cpu->hyperv_vpindex && !hv_vpindex_settable) { + /* + * the kernel doesn't support setting vp_index; assert that its value + * is in sync + */ + int ret; + struct { + struct kvm_msrs info; + struct kvm_msr_entry entries[1]; + } msr_data = { + .info.nmsrs = 1, + .entries[0].index = HV_X64_MSR_VP_INDEX, + }; + + ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_MSRS, &msr_data); + if (ret < 0) { + return ret; + } + assert(ret == 1); + + if (msr_data.entries[0].data != hyperv_vp_index(cpu)) { + error_report("kernel's vp_index != QEMU's vp_index"); + return -ENXIO; + } + } + + return 0; +} + static Error *invtsc_mig_blocker; #define KVM_MAX_CPUID_ENTRIES 100 @@ -1160,6 +1197,11 @@ int kvm_arch_init_vcpu(CPUState *cs) has_msr_tsc_aux = false; } + r = hyperv_init_vcpu(cpu); + if (r) { + goto fail; + } + return 0; fail: @@ -1351,6 +1393,8 @@ int kvm_arch_init(MachineState *ms, KVMState *s) has_pit_state2 = kvm_check_extension(s, KVM_CAP_PIT_STATE2); #endif + hv_vpindex_settable = kvm_check_extension(s, KVM_CAP_HYPERV_VP_INDEX); + ret = kvm_get_supported_msrs(s); if (ret < 0) { return ret; @@ -1900,6 +1944,9 @@ static int kvm_put_msrs(X86CPU *cpu, int level) if (has_msr_hv_runtime) { kvm_msr_entry_add(cpu, HV_X64_MSR_VP_RUNTIME, env->msr_hv_runtime); } + if (cpu->hyperv_vpindex && hv_vpindex_settable) { + kvm_msr_entry_add(cpu, HV_X64_MSR_VP_INDEX, hyperv_vp_index(cpu)); + } if (cpu->hyperv_synic) { int j; |