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| author | Joerg Roedel <joerg.roedel@amd.com> | 2011-07-07 16:13:12 +0200 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2011-08-05 12:04:27 -0300 |
| commit | b862d1fe42363e79368ed93584fb5938b75a5ffa (patch) | |
| tree | e6bc7a0755f8080a9ad37e5dd674f553f38d6b34 /target-i386 | |
| parent | a732e1baa864d5b10c5cfd9e3e437563b771c1a8 (diff) | |
| download | qemu-b862d1fe42363e79368ed93584fb5938b75a5ffa.tar.gz qemu-b862d1fe42363e79368ed93584fb5938b75a5ffa.tar.bz2 qemu-b862d1fe42363e79368ed93584fb5938b75a5ffa.zip | |
qemu-x86: Add tsc_freq option to -cpu
To let the user configure the desired tsc frequency for the
guest if running in KVM.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'target-i386')
| -rw-r--r-- | target-i386/cpu.h | 1 | ||||
| -rw-r--r-- | target-i386/cpuid.c | 13 |
2 files changed, 14 insertions, 0 deletions
diff --git a/target-i386/cpu.h b/target-i386/cpu.h index dd6c5fab3b..dcdd95f71d 100644 --- a/target-i386/cpu.h +++ b/target-i386/cpu.h @@ -743,6 +743,7 @@ typedef struct CPUX86State { uint32_t cpuid_kvm_features; uint32_t cpuid_svm_features; bool tsc_valid; + int tsc_khz; /* in order to simplify APIC support, we leave this pointer to the user */ diff --git a/target-i386/cpuid.c b/target-i386/cpuid.c index e1ae3af1e3..89e9623859 100644 --- a/target-i386/cpuid.c +++ b/target-i386/cpuid.c @@ -224,6 +224,7 @@ typedef struct x86_def_t { int family; int model; int stepping; + int tsc_khz; uint32_t features, ext_features, ext2_features, ext3_features; uint32_t kvm_features, svm_features; uint32_t xlevel; @@ -704,6 +705,17 @@ static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *cpu_model) } else if (!strcmp(featurestr, "model_id")) { pstrcpy(x86_cpu_def->model_id, sizeof(x86_cpu_def->model_id), val); + } else if (!strcmp(featurestr, "tsc_freq")) { + int64_t tsc_freq; + char *err; + + tsc_freq = strtosz_suffix_unit(val, &err, + STRTOSZ_DEFSUFFIX_B, 1000); + if (!*val || *err) { + fprintf(stderr, "bad numerical value %s\n", val); + goto error; + } + x86_cpu_def->tsc_khz = tsc_freq / 1000; } else { fprintf(stderr, "unrecognized feature %s\n", featurestr); goto error; @@ -872,6 +884,7 @@ int cpu_x86_register (CPUX86State *env, const char *cpu_model) env->cpuid_svm_features = def->svm_features; env->cpuid_ext4_features = def->ext4_features; env->cpuid_xlevel2 = def->xlevel2; + env->tsc_khz = def->tsc_khz; if (!kvm_enabled()) { env->cpuid_features &= TCG_FEATURES; env->cpuid_ext_features &= TCG_EXT_FEATURES; |