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[PULL 3/6] target/i386: add fast short REP MOV support
From: |
Eduardo Habkost |
Subject: |
[PULL 3/6] target/i386: add fast short REP MOV support |
Date: |
Thu, 16 Jul 2020 14:19:00 -0400 |
From: Chenyi Qiang <chenyi.qiang@intel.com>
For CPUs support fast short REP MOV[CPUID.(EAX=7,ECX=0):EDX(bit4)], e.g
Icelake and Tigerlake, expose it to the guest VM.
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Chenyi Qiang <chenyi.qiang@intel.com>
Message-Id: <20200714084148.26690-2-chenyi.qiang@intel.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
target/i386/cpu.h | 2 ++
target/i386/cpu.c | 2 +-
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 37fffa5cac..e1a5c174dc 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -775,6 +775,8 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS];
#define CPUID_7_0_EDX_AVX512_4VNNIW (1U << 2)
/* AVX512 Multiply Accumulation Single Precision */
#define CPUID_7_0_EDX_AVX512_4FMAPS (1U << 3)
+/* Fast Short Rep Mov */
+#define CPUID_7_0_EDX_FSRM (1U << 4)
/* AVX512 Vector Pair Intersection to a Pair of Mask Registers */
#define CPUID_7_0_EDX_AVX512_VP2INTERSECT (1U << 8)
/* SERIALIZE instruction */
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 93b62b2eca..3885826bc4 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -984,7 +984,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
.type = CPUID_FEATURE_WORD,
.feat_names = {
NULL, NULL, "avx512-4vnniw", "avx512-4fmaps",
- NULL, NULL, NULL, NULL,
+ "fsrm", NULL, NULL, NULL,
"avx512-vp2intersect", NULL, "md-clear", NULL,
NULL, NULL, "serialize", NULL,
"tsx-ldtrk", NULL, NULL /* pconfig */, NULL,
--
2.26.2
- [PULL 0/6] x86 fixes for -rc1, Eduardo Habkost, 2020/07/16
- [PULL 2/6] i386/cpu: Don't add unavailable_features to env->user_features, Eduardo Habkost, 2020/07/16
- [PULL 1/6] i368/cpu: Clear env->user_features after loading versioned CPU model, Eduardo Habkost, 2020/07/16
- [PULL 6/6] i386: hvf: Explicitly set CR4 guest/host mask, Eduardo Habkost, 2020/07/16
- [PULL 5/6] target/i386: add the missing vmx features for Skylake-Server and Cascadelake-Server CPU models, Eduardo Habkost, 2020/07/16
- [PULL 3/6] target/i386: add fast short REP MOV support,
Eduardo Habkost <=
- [PULL 4/6] target/i386: fix model number and add missing features for Icelake-Server CPU model, Eduardo Habkost, 2020/07/16
- Re: [PULL 0/6] x86 fixes for -rc1, Peter Maydell, 2020/07/17