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[v3,4/5] i386: Add CPUID bit for WBNOINVD

Message ID 1530695199-27601-5-git-send-email-robert.hu@linux.intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Robert Hoo July 4, 2018, 9:06 a.m. UTC 
WBNOINVD: Write back and do not invalidate cache, enumerated by
CPUID.(EAX=80000008H, ECX=0):EBX[bit 9].

Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
---
 target/i386/cpu.c | 2 +-
 target/i386/cpu.h | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 9407071..9ad3f93 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1027,7 +1027,7 @@  static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
         .feat_names = {
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
-            NULL, NULL, NULL, NULL,
+            NULL, "wbnoinvd", NULL, NULL,
             "ibpb", NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 12a7e6c..265f428 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -694,6 +694,8 @@  typedef uint32_t FeatureWordArray[FEATURE_WORDS];
 #define CPUID_7_0_EDX_ARCH_CAPABILITIES (1U << 29)  /*Arch Capabilities*/
 #define CPUID_7_0_EDX_SPEC_CTRL_SSBD  (1U << 31) /* Speculative Store Bypass Disable */
 
+#define CPUID_8000_0008_EBX_WBNOINVD  (1U << 9)  /* Write back and
+                                              do not invalidate cache */
 #define CPUID_8000_0008_EBX_IBPB    (1U << 12) /* Indirect Branch Prediction Barrier */
 
 #define CPUID_XSAVE_XSAVEOPT   (1U << 0)