diff options
| author | Avi Kivity <avi@redhat.com> | 2011-10-04 16:26:35 +0200 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2011-10-24 21:33:32 -0200 |
| commit | 21e87c4625f290824f4f05d098e576cda40421ce (patch) | |
| tree | 0a224637f8ff1537dfb2886ba37cece3a1656129 /target-i386/kvm.c | |
| parent | aa82ba549a3a88f7215e65956f3cb4bfd34835cc (diff) | |
i386: wire up MSR_IA32_MISC_ENABLE
It's needed for its default value - bit 0 specifies that "rep movs" is
good enough for memcpy, and Linux may use a slower memcpu if it is not set,
depending on cpu family/model.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'target-i386/kvm.c')
| -rw-r--r-- | target-i386/kvm.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/target-i386/kvm.c b/target-i386/kvm.c index 90a6ffba02..ddd115c53c 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -61,6 +61,7 @@ static bool has_msr_star; static bool has_msr_hsave_pa; static bool has_msr_tsc_deadline; static bool has_msr_async_pf_en; +static bool has_msr_misc_enable; static int lm_capable_kernel; static struct kvm_cpuid2 *try_get_cpuid(KVMState *s, int max) @@ -573,6 +574,10 @@ static int kvm_get_supported_msrs(KVMState *s) has_msr_tsc_deadline = true; continue; } + if (kvm_msr_list->indices[i] == MSR_IA32_MISC_ENABLE) { + has_msr_misc_enable = true; + continue; + } } } @@ -889,6 +894,10 @@ static int kvm_put_msrs(CPUState *env, int level) if (has_msr_tsc_deadline) { kvm_msr_entry_set(&msrs[n++], MSR_IA32_TSCDEADLINE, env->tsc_deadline); } + if (has_msr_misc_enable) { + kvm_msr_entry_set(&msrs[n++], MSR_IA32_MISC_ENABLE, + env->msr_ia32_misc_enable); + } #ifdef TARGET_X86_64 if (lm_capable_kernel) { kvm_msr_entry_set(&msrs[n++], MSR_CSTAR, env->cstar); @@ -1138,6 +1147,9 @@ static int kvm_get_msrs(CPUState *env) if (has_msr_tsc_deadline) { msrs[n++].index = MSR_IA32_TSCDEADLINE; } + if (has_msr_misc_enable) { + msrs[n++].index = MSR_IA32_MISC_ENABLE; + } if (!env->tsc_valid) { msrs[n++].index = MSR_IA32_TSC; @@ -1224,6 +1236,9 @@ static int kvm_get_msrs(CPUState *env) case MSR_MCG_CTL: env->mcg_ctl = msrs[i].data; break; + case MSR_IA32_MISC_ENABLE: + env->msr_ia32_misc_enable = msrs[i].data; + break; default: if (msrs[i].index >= MSR_MC0_CTL && msrs[i].index < MSR_MC0_CTL + (env->mcg_cap & 0xff) * 4) { |