File 0276-x86-add-infrastructure-for-7_0_EDX-.patch of Package qemu.8403
From d672bc06f0d8d36b41f2da3c941d2fcf6fcbd385 Mon Sep 17 00:00:00 2001
From: Luwei Kang <luwei.kang@intel.com>
Date: Mon, 31 Oct 2016 16:27:26 +0800
Subject: [PATCH] x86: add infrastructure for 7_0_EDX features
The spec can be found in Intel Software Developer Manual or in
Instruction Set Extensions Programming Reference.
Signed-off-by: Piotr Luc <piotr.luc@intel.com>
Signed-off-by: Luwei Kang <luwei.kang@intel.com>
Message-Id: <1477902446-5932-1-git-send-email-he.chen@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 95ea69fb46266aaa46d0c8b7f0ba8c4903dbe4e3)
[BR: BSC#1068032 CVE-2017-5715 - orig patch modified to not provide new
feature, just infrastructure, and change to match current code's feat_name
type]
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
target-i386/cpu.c | 21 ++++++++++++++++++++-
target-i386/cpu.h | 1 +
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 6e7e4e7696..33435ca54b 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -281,6 +281,17 @@ static const char *cpuid_7_0_ecx_feature_name[] = {
NULL, NULL, NULL, NULL,
};
+static const char *cpuid_7_0_edx_feature_name[] = {
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+};
+
static const char *cpuid_apm_edx_feature_name[] = {
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
@@ -371,6 +382,7 @@ static const char *cpuid_6_feature_name[] = {
CPUID_7_0_EBX_ERMS, CPUID_7_0_EBX_INVPCID, CPUID_7_0_EBX_RTM,
CPUID_7_0_EBX_RDSEED */
#define TCG_7_0_ECX_FEATURES (CPUID_7_0_ECX_PKU | CPUID_7_0_ECX_OSPKE)
+#define TCG_7_0_EDX_FEATURES 0
#define TCG_APM_FEATURES 0
#define TCG_6_EAX_FEATURES CPUID_6_EAX_ARAT
#define TCG_XSAVE_FEATURES (CPUID_XSAVE_XSAVEOPT | CPUID_XSAVE_XGETBV1)
@@ -437,6 +449,13 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
.cpuid_reg = R_ECX,
.tcg_features = TCG_7_0_ECX_FEATURES,
},
+ [FEAT_7_0_EDX] = {
+ .feat_names = cpuid_7_0_edx_feature_name,
+ .cpuid_eax = 7,
+ .cpuid_needs_ecx = true, .cpuid_ecx = 0,
+ .cpuid_reg = R_EDX,
+ .tcg_features = TCG_7_0_EDX_FEATURES,
+ },
[FEAT_8000_0007_EDX] = {
.feat_names = cpuid_apm_edx_feature_name,
.cpuid_eax = 0x80000007,
@@ -2463,7 +2482,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
if ((*ecx & CPUID_7_0_ECX_PKU) && env->cr[4] & CR4_PKE_MASK) {
*ecx |= CPUID_7_0_ECX_OSPKE;
}
- *edx = 0; /* Reserved */
+ *edx = env->features[FEAT_7_0_EDX]; /* Feature flags */
} else {
*eax = 0;
*ebx = 0;
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index 8f0299a52f..431d598723 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -435,6 +435,7 @@ typedef enum FeatureWord {
FEAT_1_ECX, /* CPUID[1].ECX */
FEAT_7_0_EBX, /* CPUID[EAX=7,ECX=0].EBX */
FEAT_7_0_ECX, /* CPUID[EAX=7,ECX=0].ECX */
+ FEAT_7_0_EDX, /* CPUID[EAX=7,ECX=0].EDX */
FEAT_8000_0001_EDX, /* CPUID[8000_0001].EDX */
FEAT_8000_0001_ECX, /* CPUID[8000_0001].ECX */
FEAT_8000_0007_EDX, /* CPUID[8000_0007].EDX */
