From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Cc: ehabkost@redhat.com
Subject: [Qemu-devel] [PATCH] target-i386: TCG can support CPUID.07H:EBX.erms
Date: Fri, 17 Jun 2016 17:47:13 +0200 [thread overview]
Message-ID: <1466178433-8512-1-git-send-email-pbonzini@redhat.com> (raw)
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 <pbonzini@redhat.com>
---
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
next reply other threads:[~2016-06-17 15:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-17 15:47 Paolo Bonzini [this message]
2016-06-21 18:27 ` [Qemu-devel] [PATCH] target-i386: TCG can support CPUID.07H:EBX.erms Eduardo Habkost
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