Re: [Qemu-devel] [PATCH] i386: remove the 'INTEL_PT' CPUID bit from named CPU models

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Hi Paolo,

On 12/21/18 7:30 AM, Paolo Bonzini wrote:
> From: Robert Hoo <robert.hu@linux.intel.com>
> 
> Processor tracing is not yet implemented for KVM and it will be an
> opt in feature requiring a special module parameter.
> Disable it, because it is wrong to enable it by default and
> it is impossible that no one has ever used it.
> 
> Cc: qemu-stable@nongnu.org

Does this patch misses Robert S-o-b?
Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>

> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>  target/i386/cpu.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/target/i386/cpu.c b/target/i386/cpu.c
> index dae46f0319..9c54c41e7a 100644
> --- a/target/i386/cpu.c
> +++ b/target/i386/cpu.c
> @@ -2493,8 +2493,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
>              CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_CLWB |
>              CPUID_7_0_EBX_AVX512F | CPUID_7_0_EBX_AVX512DQ |
>              CPUID_7_0_EBX_AVX512BW | CPUID_7_0_EBX_AVX512CD |
> -            CPUID_7_0_EBX_AVX512VL | CPUID_7_0_EBX_CLFLUSHOPT |
> -            CPUID_7_0_EBX_INTEL_PT,
> +            CPUID_7_0_EBX_AVX512VL | CPUID_7_0_EBX_CLFLUSHOPT,
>          .features[FEAT_7_0_ECX] =
>              CPUID_7_0_ECX_PKU | CPUID_7_0_ECX_OSPKE |
>              CPUID_7_0_ECX_AVX512VNNI,
> @@ -2546,7 +2545,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
>              CPUID_7_0_EBX_HLE | CPUID_7_0_EBX_AVX2 | CPUID_7_0_EBX_SMEP |
>              CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ERMS | CPUID_7_0_EBX_INVPCID |
>              CPUID_7_0_EBX_RTM | CPUID_7_0_EBX_RDSEED | CPUID_7_0_EBX_ADX |
> -            CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_INTEL_PT,
> +            CPUID_7_0_EBX_SMAP,
>          .features[FEAT_7_0_ECX] =
>              CPUID_7_0_ECX_VBMI | CPUID_7_0_ECX_UMIP | CPUID_7_0_ECX_PKU |
>              CPUID_7_0_ECX_OSPKE | CPUID_7_0_ECX_VBMI2 | CPUID_7_0_ECX_GFNI |
> @@ -2604,8 +2603,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
>              CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_CLWB |
>              CPUID_7_0_EBX_AVX512F | CPUID_7_0_EBX_AVX512DQ |
>              CPUID_7_0_EBX_AVX512BW | CPUID_7_0_EBX_AVX512CD |
> -            CPUID_7_0_EBX_AVX512VL | CPUID_7_0_EBX_CLFLUSHOPT |
> -            CPUID_7_0_EBX_INTEL_PT,
> +            CPUID_7_0_EBX_AVX512VL | CPUID_7_0_EBX_CLFLUSHOPT,
>          .features[FEAT_7_0_ECX] =
>              CPUID_7_0_ECX_VBMI | CPUID_7_0_ECX_UMIP | CPUID_7_0_ECX_PKU |
>              CPUID_7_0_ECX_OSPKE | CPUID_7_0_ECX_VBMI2 | CPUID_7_0_ECX_GFNI |
>