diff options
| -rw-r--r-- | target-i386/helper.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/target-i386/helper.c b/target-i386/helper.c index 0c9113398e..bdf242bf71 100644 --- a/target-i386/helper.c +++ b/target-i386/helper.c @@ -93,6 +93,21 @@ static void add_flagname_to_bitmaps(char *flagname, uint32_t *features, } } +static void kvm_trim_features(uint32_t *features, uint32_t supported, + const char *names[]) +{ + int i; + uint32_t mask; + + for (i = 0; i < 32; ++i) { + mask = 1U << i; + if ((*features & mask) && !(supported & mask)) { + printf("Processor feature %s not supported by kvm\n", names[i]); + *features &= ~mask; + } + } +} + typedef struct x86_def_t { const char *name; uint32_t level; @@ -1699,5 +1714,20 @@ CPUX86State *cpu_x86_init(const char *cpu_model) qemu_init_vcpu(env); + if (kvm_enabled()) { + kvm_trim_features(&env->cpuid_features, + kvm_arch_get_supported_cpuid(env, 1, R_EDX), + feature_name); + kvm_trim_features(&env->cpuid_ext_features, + kvm_arch_get_supported_cpuid(env, 1, R_ECX), + ext_feature_name); + kvm_trim_features(&env->cpuid_ext2_features, + kvm_arch_get_supported_cpuid(env, 0x80000001, R_EDX), + ext2_feature_name); + kvm_trim_features(&env->cpuid_ext3_features, + kvm_arch_get_supported_cpuid(env, 0x80000001, R_ECX), + ext3_feature_name); + } + return env; } |