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[PULL,12/28] target-i386: Add support for UMIP and RDPID CPUID bits

Message ID 1469027314-31655-13-git-send-email-ehabkost@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Eduardo Habkost July 20, 2016, 3:08 p.m. UTC 
From: Paolo Bonzini <pbonzini@redhat.com>

These are both stored in CPUID[EAX=7,EBX=0].ECX.  KVM is going to
be able to emulate both (albeit with a performance loss in the case
of RDPID, which therefore will be in KVM_GET_EMULATED_CPUID rather
than KVM_GET_SUPPORTED_CPUID).

It's also possible to implement both in TCG, but this is for 2.8.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 target-i386/cpu.c | 4 ++--
 target-i386/cpu.h | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)
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Patch

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index de0295a..c36441d 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -305,12 +305,12 @@  static const char *cpuid_7_0_ebx_feature_name[] = {
 };
 
 static const char *cpuid_7_0_ecx_feature_name[] = {
-    NULL, NULL, NULL, "pku",
+    NULL, NULL, "umip", "pku",
     "ospke", NULL, NULL, NULL,
     NULL, NULL, NULL, NULL,
     NULL, NULL, NULL, NULL,
     NULL, NULL, NULL, NULL,
-    NULL, NULL, NULL, NULL,
+    NULL, NULL, "rdpid", NULL,
     NULL, NULL, NULL, NULL,
     NULL, NULL, NULL, NULL,
 };
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index c883cd5..65615c0 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -616,8 +616,10 @@  typedef uint32_t FeatureWordArray[FEATURE_WORDS];
 #define CPUID_7_0_EBX_AVX512ER (1U << 27) /* AVX-512 Exponential and Reciprocal */
 #define CPUID_7_0_EBX_AVX512CD (1U << 28) /* AVX-512 Conflict Detection */
 
+#define CPUID_7_0_ECX_UMIP     (1U << 2)
 #define CPUID_7_0_ECX_PKU      (1U << 3)
 #define CPUID_7_0_ECX_OSPKE    (1U << 4)
+#define CPUID_7_0_ECX_RDPID    (1U << 22)
 
 #define CPUID_XSAVE_XSAVEOPT   (1U << 0)
 #define CPUID_XSAVE_XSAVEC     (1U << 1)