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Re: [Qemu-devel] [PATCH] target-i386: TCG can support CPUID.07H:EBX.erms
From: |
Eduardo Habkost |
Subject: |
Re: [Qemu-devel] [PATCH] target-i386: TCG can support CPUID.07H:EBX.erms |
Date: |
Tue, 21 Jun 2016 15:27:56 -0300 |
User-agent: |
Mutt/1.6.1 (2016-04-27) |
On Fri, Jun 17, 2016 at 05:47:13PM +0200, Paolo Bonzini wrote:
> ERMS just says "rep movsb" and "rep stosb" are fast. It does not
> imply any new instruction, so we can support it easily.
>
> Signed-off-by: Paolo Bonzini <address@hidden>
Reviewed-by: Eduardo Habkost <address@hidden>
Applied to x86-next. Thanks.
> ---
> target-i386/cpu.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/target-i386/cpu.c b/target-i386/cpu.c
> index 3665fec..3871eb8 100644
> --- a/target-i386/cpu.c
> +++ b/target-i386/cpu.c
> @@ -358,10 +358,11 @@ static const char *cpuid_6_feature_name[] = {
> #define TCG_7_0_EBX_FEATURES (CPUID_7_0_EBX_SMEP | CPUID_7_0_EBX_SMAP | \
> CPUID_7_0_EBX_BMI1 | CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ADX | \
> CPUID_7_0_EBX_PCOMMIT | CPUID_7_0_EBX_CLFLUSHOPT | \
> - CPUID_7_0_EBX_CLWB | CPUID_7_0_EBX_MPX | CPUID_7_0_EBX_FSGSBASE)
> + CPUID_7_0_EBX_CLWB | CPUID_7_0_EBX_MPX | CPUID_7_0_EBX_FSGSBASE | \
> + CPUID_7_0_EBX_ERMS)
> /* missing:
> CPUID_7_0_EBX_HLE, CPUID_7_0_EBX_AVX2,
> - CPUID_7_0_EBX_ERMS, CPUID_7_0_EBX_INVPCID, CPUID_7_0_EBX_RTM,
> + CPUID_7_0_EBX_INVPCID, CPUID_7_0_EBX_RTM,
> CPUID_7_0_EBX_RDSEED */
> #define TCG_7_0_ECX_FEATURES (CPUID_7_0_ECX_PKU | CPUID_7_0_ECX_OSPKE)
> #define TCG_APM_FEATURES 0
> --
> 2.5.5
>
--
Eduardo