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[Qemu-devel] [PULL 1/4] x86/cpu: Enable MOVDIRI cpu feature
From: |
Eduardo Habkost |
Subject: |
[Qemu-devel] [PULL 1/4] x86/cpu: Enable MOVDIRI cpu feature |
Date: |
Tue, 11 Dec 2018 18:53:43 -0200 |
From: Liu Jingqi <address@hidden>
MOVDIRI moves doubleword or quadword from register to memory through
direct store which is implemented by using write combining (WC) for
writing data directly into memory without caching the data.
The bit definition:
CPUID.(EAX=7,ECX=0):ECX[bit 27] MOVDIRI
The release document ref below link:
https://software.intel.com/sites/default/files/managed/c5/15/\
architecture-instruction-set-extensions-programming-reference.pdf
Cc: Xu Tao <address@hidden>
Signed-off-by: Liu Jingqi <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Eduardo Habkost <address@hidden>
---
target/i386/cpu.h | 1 +
target/i386/cpu.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 9c52d0cbeb..b4f03ffd74 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -687,6 +687,7 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
#define CPUID_7_0_ECX_LA57 (1U << 16)
#define CPUID_7_0_ECX_RDPID (1U << 22)
#define CPUID_7_0_ECX_CLDEMOTE (1U << 25) /* CLDEMOTE Instruction */
+#define CPUID_7_0_ECX_MOVDIRI (1U << 27) /* MOVDIRI Instruction */
#define CPUID_7_0_EDX_AVX512_4VNNIW (1U << 2) /* AVX512 Neural Network
Instructions */
#define CPUID_7_0_EDX_AVX512_4FMAPS (1U << 3) /* AVX512 Multiply Accumulation
Single Precision */
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index f81d35e1f9..227baea337 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1023,7 +1023,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] =
{
"avx512bitalg", NULL, "avx512-vpopcntdq", NULL,
"la57", NULL, NULL, NULL,
NULL, NULL, "rdpid", NULL,
- NULL, "cldemote", NULL, NULL,
+ NULL, "cldemote", NULL, "movdiri",
NULL, NULL, NULL, NULL,
},
.cpuid = {
--
2.18.0.rc1.1.g3f1ff2140