diff options
| -rw-r--r-- | target-i386/kvm.c | 78 |
1 files changed, 49 insertions, 29 deletions
diff --git a/target-i386/kvm.c b/target-i386/kvm.c index a13599db81..485572f82b 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -92,6 +92,35 @@ static struct kvm_cpuid2 *try_get_cpuid(KVMState *s, int max) return cpuid; } +#ifdef CONFIG_KVM_PARA +struct kvm_para_features { + int cap; + int feature; +} para_features[] = { + { KVM_CAP_CLOCKSOURCE, KVM_FEATURE_CLOCKSOURCE }, + { KVM_CAP_NOP_IO_DELAY, KVM_FEATURE_NOP_IO_DELAY }, + { KVM_CAP_PV_MMU, KVM_FEATURE_MMU_OP }, +#ifdef KVM_CAP_ASYNC_PF + { KVM_CAP_ASYNC_PF, KVM_FEATURE_ASYNC_PF }, +#endif + { -1, -1 } +}; + +static int get_para_features(CPUState *env) +{ + int i, features = 0; + + for (i = 0; i < ARRAY_SIZE(para_features) - 1; i++) { + if (kvm_check_extension(env->kvm_state, para_features[i].cap)) { + features |= (1 << para_features[i].feature); + } + } + + return features; +} +#endif + + uint32_t kvm_arch_get_supported_cpuid(CPUState *env, uint32_t function, uint32_t index, int reg) { @@ -99,6 +128,9 @@ uint32_t kvm_arch_get_supported_cpuid(CPUState *env, uint32_t function, int i, max; uint32_t ret = 0; uint32_t cpuid_1_edx; +#ifdef CONFIG_KVM_PARA + int has_kvm_features = 0; +#endif max = 1; while ((cpuid = try_get_cpuid(env->kvm_state, max)) == NULL) { @@ -108,6 +140,11 @@ uint32_t kvm_arch_get_supported_cpuid(CPUState *env, uint32_t function, for (i = 0; i < cpuid->nent; ++i) { if (cpuid->entries[i].function == function && cpuid->entries[i].index == index) { +#ifdef CONFIG_KVM_PARA + if (cpuid->entries[i].function == KVM_CPUID_FEATURES) { + has_kvm_features = 1; + } +#endif switch (reg) { case R_EAX: ret = cpuid->entries[i].eax; @@ -140,38 +177,15 @@ uint32_t kvm_arch_get_supported_cpuid(CPUState *env, uint32_t function, qemu_free(cpuid); - return ret; -} - #ifdef CONFIG_KVM_PARA -struct kvm_para_features { - int cap; - int feature; -} para_features[] = { - { KVM_CAP_CLOCKSOURCE, KVM_FEATURE_CLOCKSOURCE }, - { KVM_CAP_NOP_IO_DELAY, KVM_FEATURE_NOP_IO_DELAY }, - { KVM_CAP_PV_MMU, KVM_FEATURE_MMU_OP }, -#ifdef KVM_CAP_ASYNC_PF - { KVM_CAP_ASYNC_PF, KVM_FEATURE_ASYNC_PF }, -#endif - { -1, -1 } -}; - -static int get_para_features(CPUState *env) -{ - int i, features = 0; - - for (i = 0; i < ARRAY_SIZE(para_features) - 1; i++) { - if (kvm_check_extension(env->kvm_state, para_features[i].cap)) { - features |= (1 << para_features[i].feature); - } + /* fallback for older kernels */ + if (!has_kvm_features && (function == KVM_CPUID_FEATURES)) { + ret = get_para_features(env); } -#ifdef KVM_CAP_ASYNC_PF - has_msr_async_pf_en = features & (1 << KVM_FEATURE_ASYNC_PF); #endif - return features; + + return ret; } -#endif /* CONFIG_KVM_PARA */ typedef struct HWPoisonPage { ram_addr_t ram_addr; @@ -397,7 +411,13 @@ int kvm_arch_init_vcpu(CPUState *env) c = &cpuid_data.entries[cpuid_i++]; memset(c, 0, sizeof(*c)); c->function = KVM_CPUID_FEATURES; - c->eax = env->cpuid_kvm_features & get_para_features(env); + c->eax = env->cpuid_kvm_features & kvm_arch_get_supported_cpuid(env, + KVM_CPUID_FEATURES, 0, R_EAX); + +#ifdef KVM_CAP_ASYNC_PF + has_msr_async_pf_en = c->eax & (1 << KVM_FEATURE_ASYNC_PF); +#endif + #endif cpu_x86_cpuid(env, 0, 0, &limit, &unused, &unused, &unused); |