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[PULL,07/16] target-i386: TCG can support CPUID.07H:EBX.erms

Message ID 1467921562-11796-8-git-send-email-ehabkost@redhat.com
State New
Headers show

Commit Message

Eduardo Habkost July 7, 2016, 7:59 p.m. UTC 
From: Paolo Bonzini <pbonzini@redhat.com>

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>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 target-i386/cpu.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
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Patch

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 3bd3cfc..2227f22 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