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From 18cf0d751c615e83243e13f3170508289cd78457 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Sat, 16 Feb 2019 00:01:45 +0000
Subject: [PATCH 1/4] target/i386: Disable MPX support on named CPU models
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Paolo Bonzini <pbonzini@redhat.com>
Message-id: <1550275305-42020-1-git-send-email-pbonzini@redhat.com>
Patchwork-id: 84525
O-Subject: [rhel-av-8.0.0 qemu-kvm PATCH] target/i386: Disable MPX support on named CPU models
Bugzilla: 1661030
RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
Bugzilla: 1661030
Brew build: http://brewweb.devel.redhat.com/brew/taskinfo?taskID=20232369
MPX support is being phased out by Intel; GCC has dropped it, Linux
is also going to do that. Even though KVM will have special code
to support MPX after the kernel proper stops enabling it in XCR0,
we probably also want to deprecate that in a few years. As a start,
do not enable it by default for any named CPU model starting with
the 4.0 machine types; this include Skylake, Icelake and Cascadelake.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20181220121100.21554-1-pbonzini@redhat.com>
Reviewed-by:   Wainer dos Santos Moschetta <wainersm@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
(cherry picked from commit ecb85fe48cacb2f8740186e81f2f38a2e02bd963)
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
Conflicts:
hw/i386/pc.c [old-style global properties]
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
include/hw/i386/pc.h | 28 ++++++++++++++++++++++++++++
target/i386/cpu.c | 14 +++++++-------
2 files changed, 35 insertions(+), 7 deletions(-)
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 426a975..782d728 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -1022,6 +1022,34 @@ extern void igd_passthrough_isa_bridge_create(PCIBus *bus, uint16_t gpu_dev_id);
.driver = TYPE_X86_CPU,\
.property = "x-migrate-smi-count",\
.value = "off",\
+ },{ /* PC_RHEL7_6_COMPAT from pc_compat_3_1 */ \
+ .driver = "Skylake-Client" "-" TYPE_X86_CPU,\
+ .property = "mpx",\
+ .value = "on",\
+ },{ /* PC_RHEL7_6_COMPAT from pc_compat_3_1 */ \
+ .driver = "Skylake-Client-IBRS" "-" TYPE_X86_CPU,\
+ .property = "mpx",\
+ .value = "on",\
+ },{ /* PC_RHEL7_6_COMPAT from pc_compat_3_1 */ \
+ .driver = "Skylake-Server" "-" TYPE_X86_CPU,\
+ .property = "mpx",\
+ .value = "on",\
+ },{ /* PC_RHEL7_6_COMPAT from pc_compat_3_1 */ \
+ .driver = "Skylake-Server-IBRS" "-" TYPE_X86_CPU,\
+ .property = "mpx",\
+ .value = "on",\
+ },{ /* PC_RHEL7_6_COMPAT from pc_compat_3_1 */ \
+ .driver = "Cascadelake-Server" "-" TYPE_X86_CPU,\
+ .property = "mpx",\
+ .value = "on",\
+ },{ /* PC_RHEL7_6_COMPAT from pc_compat_3_1 */ \
+ .driver = "Icelake-Client" "-" TYPE_X86_CPU,\
+ .property = "mpx",\
+ .value = "on",\
+ },{ /* PC_RHEL7_6_COMPAT from pc_compat_3_1 */ \
+ .driver = "Icelake-Server" "-" TYPE_X86_CPU,\
+ .property = "mpx",\
+ .value = "on",\
},
/* Similar to PC_COMPAT_2_11 + PC_COMPAT_2_10, but:
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 8570b25..dbcf632 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -2358,7 +2358,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
CPUID_7_0_EBX_HLE | CPUID_7_0_EBX_AVX2 | CPUID_7_0_EBX_SMEP |
CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ERMS | CPUID_7_0_EBX_INVPCID |
CPUID_7_0_EBX_RTM | CPUID_7_0_EBX_RDSEED | CPUID_7_0_EBX_ADX |
- CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_MPX,
+ CPUID_7_0_EBX_SMAP,
/* Missing: XSAVES (not supported by some Linux versions,
* including v4.1 to v4.12).
* KVM doesn't yet expose any XSAVES state save component,
@@ -2405,7 +2405,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
CPUID_7_0_EBX_HLE | CPUID_7_0_EBX_AVX2 | CPUID_7_0_EBX_SMEP |
CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ERMS | CPUID_7_0_EBX_INVPCID |
CPUID_7_0_EBX_RTM | CPUID_7_0_EBX_RDSEED | CPUID_7_0_EBX_ADX |
- CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_MPX,
+ CPUID_7_0_EBX_SMAP,
/* Missing: XSAVES (not supported by some Linux versions,
* including v4.1 to v4.12).
* KVM doesn't yet expose any XSAVES state save component,
@@ -2450,7 +2450,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
CPUID_7_0_EBX_HLE | CPUID_7_0_EBX_AVX2 | CPUID_7_0_EBX_SMEP |
CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ERMS | CPUID_7_0_EBX_INVPCID |
CPUID_7_0_EBX_RTM | CPUID_7_0_EBX_RDSEED | CPUID_7_0_EBX_ADX |
- CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_MPX | CPUID_7_0_EBX_CLWB |
+ CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_CLWB |
CPUID_7_0_EBX_AVX512F | CPUID_7_0_EBX_AVX512DQ |
CPUID_7_0_EBX_AVX512BW | CPUID_7_0_EBX_AVX512CD |
CPUID_7_0_EBX_AVX512VL | CPUID_7_0_EBX_CLFLUSHOPT,
@@ -2502,7 +2502,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
CPUID_7_0_EBX_HLE | CPUID_7_0_EBX_AVX2 | CPUID_7_0_EBX_SMEP |
CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ERMS | CPUID_7_0_EBX_INVPCID |
CPUID_7_0_EBX_RTM | CPUID_7_0_EBX_RDSEED | CPUID_7_0_EBX_ADX |
- CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_MPX | CPUID_7_0_EBX_CLWB |
+ CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_CLWB |
CPUID_7_0_EBX_AVX512F | CPUID_7_0_EBX_AVX512DQ |
CPUID_7_0_EBX_AVX512BW | CPUID_7_0_EBX_AVX512CD |
CPUID_7_0_EBX_AVX512VL,
@@ -2552,7 +2552,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
CPUID_7_0_EBX_HLE | CPUID_7_0_EBX_AVX2 | CPUID_7_0_EBX_SMEP |
CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ERMS | CPUID_7_0_EBX_INVPCID |
CPUID_7_0_EBX_RTM | CPUID_7_0_EBX_RDSEED | CPUID_7_0_EBX_ADX |
- CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_MPX | CPUID_7_0_EBX_CLWB |
+ CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_CLWB |
CPUID_7_0_EBX_AVX512F | CPUID_7_0_EBX_AVX512DQ |
CPUID_7_0_EBX_AVX512BW | CPUID_7_0_EBX_AVX512CD |
CPUID_7_0_EBX_AVX512VL | CPUID_7_0_EBX_CLFLUSHOPT |
@@ -2608,7 +2608,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
CPUID_7_0_EBX_HLE | CPUID_7_0_EBX_AVX2 | CPUID_7_0_EBX_SMEP |
CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ERMS | CPUID_7_0_EBX_INVPCID |
CPUID_7_0_EBX_RTM | CPUID_7_0_EBX_RDSEED | CPUID_7_0_EBX_ADX |
- CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_MPX | CPUID_7_0_EBX_INTEL_PT,
+ CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_INTEL_PT,
.features[FEAT_7_0_ECX] =
CPUID_7_0_ECX_VBMI | CPUID_7_0_ECX_UMIP | CPUID_7_0_ECX_PKU |
CPUID_7_0_ECX_OSPKE | CPUID_7_0_ECX_VBMI2 | CPUID_7_0_ECX_GFNI |
@@ -2663,7 +2663,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
CPUID_7_0_EBX_HLE | CPUID_7_0_EBX_AVX2 | CPUID_7_0_EBX_SMEP |
CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ERMS | CPUID_7_0_EBX_INVPCID |
CPUID_7_0_EBX_RTM | CPUID_7_0_EBX_RDSEED | CPUID_7_0_EBX_ADX |
- CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_MPX | CPUID_7_0_EBX_CLWB |
+ CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_CLWB |
CPUID_7_0_EBX_AVX512F | CPUID_7_0_EBX_AVX512DQ |
CPUID_7_0_EBX_AVX512BW | CPUID_7_0_EBX_AVX512CD |
CPUID_7_0_EBX_AVX512VL | CPUID_7_0_EBX_CLFLUSHOPT |
--
1.8.3.1
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