File 0055-x86-cpu-Enable-MOVDIRI-cpu-feature.patch of Package qemu-linux-user.15021

Overview Repositories Revisions Requests Users Attributes Meta

File 0055-x86-cpu-Enable-MOVDIRI-cpu-feature.patch of Package qemu-linux-user.15021

From: Liu Jingqi <jingqi.liu@intel.com>
Date: Tue, 6 Nov 2018 15:13:26 +0800
Subject: x86/cpu: Enable MOVDIRI cpu feature

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 <tao3.xu@intel.com>
Signed-off-by: Liu Jingqi <jingqi.liu@intel.com>
Message-Id: <1541488407-17045-2-git-send-email-jingqi.liu@intel.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
(cherry picked from commit 24261de4916596d8ab5f5fee67e9e7a19e8325a5)
[CF: jira SLE-6754]
Signed-off-by: Claudio Fontana <claudio.fontana@suse.com>
---
 target/i386/cpu.c | 2 +-
 target/i386/cpu.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 6e81aca1cf..3135f292ee 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 = {
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 48a6186e2f..653e363958 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 */

Places

File 0055-x86-cpu-Enable-MOVDIRI-cpu-feature.patch of Package qemu-linux-user.15021

Places