diff options
| author | Eduardo Habkost <ehabkost@redhat.com> | 2016-04-15 14:54:26 -0300 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2016-04-18 15:49:17 -0300 |
| commit | 9997cf7bdac056aeed246613639675c5a9f8fdc2 (patch) | |
| tree | b5443e0b49e2b344f7413562be429422f357b31a /target-i386/cpu.c | |
| parent | 92b674b62a1aec734280c9019cfb3b3745044b66 (diff) | |
target-i386: Set AMD alias bits after filtering CPUID data
QEMU complains about -cpu host on an AMD machine:
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 0]
For bits 0,1,3,4,5,6,7,8,9,12,13,14,15,16,17,23,24.
KVM_GET_SUPPORTED_CPUID and and x86_cpu_get_migratable_flags()
don't handle the AMD CPUID aliases bits, making
x86_cpu_filter_features() print warnings and clear those CPUID
bits incorrectly.
To avoid hacking x86_cpu_get_migratable_flags() to handle
CPUID_EXT2_AMD_ALIASES (just like the existing hack inside
kvm_arch_get_supported_cpuid()), simply move the
CPUID_EXT2_AMD_ALIASES code in x86_cpu_realizefn() after the
x86_cpu_filter_features() call.
This will probably make the CPUID_EXT2_AMD_ALIASES hack in
kvm_arch_get_supported_cpuid() unnecessary, too. The hack will be
removed in a follow-up patch after v2.6.0.
Reported-by: Radim Krčmář <rkrcmar@redhat.com>
Tested-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'target-i386/cpu.c')
| -rw-r--r-- | target-i386/cpu.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/target-i386/cpu.c b/target-i386/cpu.c index ddae932ee1..d0b5b69156 100644 --- a/target-i386/cpu.c +++ b/target-i386/cpu.c @@ -2897,6 +2897,14 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp) env->cpuid_level = 7; } + if (x86_cpu_filter_features(cpu) && cpu->enforce_cpuid) { + error_setg(&local_err, + kvm_enabled() ? + "Host doesn't support requested features" : + "TCG doesn't support requested features"); + goto out; + } + /* On AMD CPUs, some CPUID[8000_0001].EDX bits must match the bits on * CPUID[1].EDX. */ @@ -2907,14 +2915,6 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp) } - if (x86_cpu_filter_features(cpu) && cpu->enforce_cpuid) { - error_setg(&local_err, - kvm_enabled() ? - "Host doesn't support requested features" : - "TCG doesn't support requested features"); - goto out; - } - #ifndef CONFIG_USER_ONLY qemu_register_reset(x86_cpu_machine_reset_cb, cpu); |