File 0442-x86-add-infrastructure-for-7_0_EDX-.patch of Package qemu.8405

From 012edfd63a6d5b8d5b0ff634ab386abfcedaf094 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 13f7d6cefc..1b4d450eb8 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -262,6 +262,17 @@ static const char *cpuid_7_0_ebx_feature_name[] = {
     NULL, NULL, NULL, NULL, 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,
+};
+
 typedef struct FeatureWordInfo {
     const char **feat_names;
     uint32_t cpuid_eax;   /* Input EAX for CPUID */
@@ -305,6 +316,12 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
         .cpuid_needs_ecx = true, .cpuid_ecx = 0,
         .cpuid_reg = R_EBX,
     },
+    [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,
+    },
 };
 
 typedef struct X86RegisterInfo32 {
@@ -594,6 +611,7 @@ struct X86CPUDefinition {
           CPUID_7_0_EBX_FSGSBASE, CPUID_7_0_EBX_HLE, CPUID_7_0_EBX_AVX2,
           CPUID_7_0_EBX_ERMS, CPUID_7_0_EBX_INVPCID, CPUID_7_0_EBX_RTM,
           CPUID_7_0_EBX_RDSEED */
+#define TCG_7_0_EDX_FEATURES 0
 
 static X86CPUDefinition builtin_x86_defs[] = {
     {
@@ -2202,7 +2220,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
             *eax = 0; /* Maximum ECX value for sub-leaves */
             *ebx = env->features[FEAT_7_0_EBX]; /* Feature flags */
             *ecx = 0; /* Reserved */
-            *edx = 0; /* Reserved */
+            *edx = env->features[FEAT_7_0_EDX]; /* Feature flags */
         } else {
             *eax = 0;
             *ebx = 0;
@@ -2616,6 +2634,7 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
         env->features[FEAT_1_EDX] &= TCG_FEATURES;
         env->features[FEAT_1_ECX] &= TCG_EXT_FEATURES;
         env->features[FEAT_7_0_EBX] &= TCG_7_0_EBX_FEATURES;
+        env->features[FEAT_7_0_EDX] &= TCG_7_0_EDX_FEATURES;
         env->features[FEAT_8000_0001_EDX] &= TCG_EXT2_FEATURES;
         env->features[FEAT_8000_0001_ECX] &= TCG_EXT3_FEATURES;
         env->features[FEAT_SVM] &= TCG_SVM_FEATURES;
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index 2935be51d9..fa162f1d27 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -399,6 +399,7 @@ typedef enum FeatureWord {
     FEAT_1_EDX,         /* CPUID[1].EDX */
     FEAT_1_ECX,         /* CPUID[1].ECX */
     FEAT_7_0_EBX,       /* CPUID[EAX=7,ECX=0].EBX */
+    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_C000_0001_EDX, /* CPUID[C000_0001].EDX */