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[Qemu-devel] [PATCH for 2.7] target-i386: add support for UMIP and RDPID
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH for 2.7] target-i386: add support for UMIP and RDPID CPUID bits |
Date: |
Tue, 12 Jul 2016 11:15:44 +0200 |
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 <address@hidden>
---
target-i386/cpu.c | 4 ++--
target-i386/cpu.h | 2 ++
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 3bd3cfc..7fc86c3 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -264,12 +264,12 @@ 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 474b0b9..0ed3b56 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -606,8 +606,10 @@ 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)
--
2.7.4
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