diff mbox series

[PULL,2/4] x86/cpu: Enable MOVDIR64B cpu feature

Message ID 20181211205346.11118-3-ehabkost@redhat.com (mailing list archive)
State New, archived
Headers show
Series [PULL,1/4] x86/cpu: Enable MOVDIRI cpu feature | expand

Commit Message

Eduardo Habkost Dec. 11, 2018, 8:53 p.m. UTC 
From: Liu Jingqi <jingqi.liu@intel.com>

MOVDIR64B moves 64-bytes as direct-store with 64-bytes write atomicity.
Direct store 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 28] MOVDIR64B

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 <tao3.xu@intel.com>
Signed-off-by: Liu Jingqi <jingqi.liu@intel.com>
Message-Id: <1541488407-17045-3-git-send-email-jingqi.liu@intel.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 target/i386/cpu.h | 1 +
 target/i386/cpu.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index b4f03ffd74..ef41a033c5 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -688,6 +688,7 @@  typedef uint32_t FeatureWordArray[FEATURE_WORDS];
 #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_ECX_MOVDIR64B (1U << 28) /* MOVDIR64B 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 227baea337..86a934d450 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1024,7 +1024,7 @@  static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             "la57", NULL, NULL, NULL,
             NULL, NULL, "rdpid", NULL,
             NULL, "cldemote", NULL, "movdiri",
-            NULL, NULL, NULL, NULL,
+            "movdir64b", NULL, NULL, NULL,
         },
         .cpuid = {
             .eax = 7,