diff options
| -rw-r--r-- | docs/hyperv.txt | 10 | ||||
| -rw-r--r-- | target/i386/cpu.c | 4 | ||||
| -rw-r--r-- | target/i386/cpu.h | 1 | ||||
| -rw-r--r-- | target/i386/kvm/hyperv-proto.h | 1 | ||||
| -rw-r--r-- | target/i386/kvm/kvm.c | 10 |
5 files changed, 24 insertions, 2 deletions
diff --git a/docs/hyperv.txt b/docs/hyperv.txt index 072709a68f..cd1ea3bbe9 100644 --- a/docs/hyperv.txt +++ b/docs/hyperv.txt @@ -189,7 +189,15 @@ enabled. Requires: hv-vpindex, hv-synic, hv-time, hv-stimer -3.17. hv-no-nonarch-coresharing=on/off/auto +3.18. hv-avic (hv-apicv) +======================= +The enlightenment allows to use Hyper-V SynIC with hardware APICv/AVIC enabled. +Normally, Hyper-V SynIC disables these hardware feature and suggests the guest +to use paravirtualized AutoEOI feature. +Note: enabling this feature on old hardware (without APICv/AVIC support) may +have negative effect on guest's performace. + +3.19. hv-no-nonarch-coresharing=on/off/auto =========================================== This enlightenment tells guest OS that virtual processors will never share a physical core unless they are reported as sibling SMT threads. This information diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 2a19eba56d..8154343cc4 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -6644,6 +6644,8 @@ static void x86_cpu_initfn(Object *obj) object_property_add_alias(obj, "sse4_1", obj, "sse4.1"); object_property_add_alias(obj, "sse4_2", obj, "sse4.2"); + object_property_add_alias(obj, "hv-apicv", obj, "hv-avic"); + if (xcc->model) { x86_cpu_load_model(cpu, xcc->model); } @@ -6831,6 +6833,8 @@ static Property x86_cpu_properties[] = { HYPERV_FEAT_IPI, 0), DEFINE_PROP_BIT64("hv-stimer-direct", X86CPU, hyperv_features, HYPERV_FEAT_STIMER_DIRECT, 0), + DEFINE_PROP_BIT64("hv-avic", X86CPU, hyperv_features, + HYPERV_FEAT_AVIC, 0), DEFINE_PROP_ON_OFF_AUTO("hv-no-nonarch-coresharing", X86CPU, hyperv_no_nonarch_cs, ON_OFF_AUTO_OFF), DEFINE_PROP_BOOL("hv-passthrough", X86CPU, hyperv_passthrough, false), diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 8a7209bbf2..65f0ee2caf 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -1056,6 +1056,7 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS]; #define HYPERV_FEAT_EVMCS 12 #define HYPERV_FEAT_IPI 13 #define HYPERV_FEAT_STIMER_DIRECT 14 +#define HYPERV_FEAT_AVIC 15 #ifndef HYPERV_SPINLOCK_NEVER_NOTIFY #define HYPERV_SPINLOCK_NEVER_NOTIFY 0xFFFFFFFF diff --git a/target/i386/kvm/hyperv-proto.h b/target/i386/kvm/hyperv-proto.h index 5fbb385cc1..89f81afda7 100644 --- a/target/i386/kvm/hyperv-proto.h +++ b/target/i386/kvm/hyperv-proto.h @@ -66,6 +66,7 @@ #define HV_APIC_ACCESS_RECOMMENDED (1u << 3) #define HV_SYSTEM_RESET_RECOMMENDED (1u << 4) #define HV_RELAXED_TIMING_RECOMMENDED (1u << 5) +#define HV_DEPRECATING_AEOI_RECOMMENDED (1u << 9) #define HV_CLUSTER_IPI_RECOMMENDED (1u << 10) #define HV_EX_PROCESSOR_MASKS_RECOMMENDED (1u << 11) #define HV_ENLIGHTENED_VMCS_RECOMMENDED (1u << 14) diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index a9a8f77df3..68faf72e34 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -924,6 +924,13 @@ static struct { }, .dependencies = BIT(HYPERV_FEAT_STIMER) }, + [HYPERV_FEAT_AVIC] = { + .desc = "AVIC/APICv support (hv-avic/hv-apicv)", + .flags = { + {.func = HV_CPUID_ENLIGHTMENT_INFO, .reg = R_EAX, + .bits = HV_DEPRECATING_AEOI_RECOMMENDED} + } + }, }; static struct kvm_cpuid2 *try_get_hv_cpuid(CPUState *cs, int max, @@ -1373,7 +1380,8 @@ static int hyperv_fill_cpuids(CPUState *cs, c->eax = hv_build_cpuid_leaf(cs, HV_CPUID_ENLIGHTMENT_INFO, R_EAX); c->ebx = cpu->hyperv_spinlock_attempts; - if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VAPIC)) { + if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VAPIC) && + !hyperv_feat_enabled(cpu, HYPERV_FEAT_AVIC)) { c->eax |= HV_APIC_ACCESS_RECOMMENDED; } |