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[Qemu-devel] [PATCH 42/99] i386: define the 'ssbd' CPUID feature bit (CV
From: |
Michael Roth |
Subject: |
[Qemu-devel] [PATCH 42/99] i386: define the 'ssbd' CPUID feature bit (CVE-2018-3639) |
Date: |
Mon, 23 Jul 2018 15:16:51 -0500 |
From: Daniel P. Berrangé <address@hidden>
New microcode introduces the "Speculative Store Bypass Disable"
CPUID feature bit. This needs to be exposed to guest OS to allow
them to protect against CVE-2018-3639.
Signed-off-by: Daniel P. Berrangé <address@hidden>
Reviewed-by: Konrad Rzeszutek Wilk <address@hidden>
Signed-off-by: Konrad Rzeszutek Wilk <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Eduardo Habkost <address@hidden>
(cherry picked from commit d19d1f965904a533998739698020ff4ee8a103da)
Signed-off-by: Michael Roth <address@hidden>
---
target/i386/cpu.c | 2 +-
target/i386/cpu.h | 1 +
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index a20fe26573..2f5263e22f 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -510,7 +510,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, "spec-ctrl", NULL,
- NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, "ssbd",
},
.cpuid_eax = 7,
.cpuid_needs_ecx = true, .cpuid_ecx = 0,
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 1b219fafc4..970ab96e54 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -684,6 +684,7 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
#define CPUID_7_0_EDX_AVX512_4VNNIW (1U << 2) /* AVX512 Neural Network
Instructions */
#define CPUID_7_0_EDX_AVX512_4FMAPS (1U << 3) /* AVX512 Multiply Accumulation
Single Precision */
#define CPUID_7_0_EDX_SPEC_CTRL (1U << 26) /* Speculation Control */
+#define CPUID_7_0_EDX_SPEC_CTRL_SSBD (1U << 31) /* Speculative Store Bypass
Disable */
#define KVM_HINTS_DEDICATED (1U << 0)
--
2.17.1
- [Qemu-devel] [PATCH 34/99] arm_gicv3_kvm: increase clroffset accordingly, (continued)
- [Qemu-devel] [PATCH 34/99] arm_gicv3_kvm: increase clroffset accordingly, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 33/99] intel-iommu: rework the page walk logic, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 36/99] ahci: fix PxCI register race, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 35/99] Fix libusb-1.0.22 deprecated libusb_set_debug with libusb_set_option, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 38/99] block: Make bdrv_is_writable() public, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 37/99] arm_gicv3_kvm: kvm_dist_get/put: skip the registers banked by GICR, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 39/99] qcow2: Do not mark inactive images corrupt, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 40/99] iotests: Add case for a corrupted inactive image, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 03/99] ccid: Fix dwProtocols advertisement of T=0, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 41/99] throttle: Fix crash on reopen, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 42/99] i386: define the 'ssbd' CPUID feature bit (CVE-2018-3639),
Michael Roth <=
- [Qemu-devel] [PATCH 43/99] i386: Define the Virt SSBD MSR and handling of it (CVE-2018-3639), Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 44/99] i386: define the AMD 'virt-ssbd' CPUID feature bit (CVE-2018-3639), Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 45/99] tap: set vhostfd passed from qemu cli to non-blocking, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 46/99] vhost-user: delete net client if necessary, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 47/99] qemu-img: Fix assert when mapping unaligned raw file, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 48/99] iotests: Add test 221 to catch qemu-img map regression, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 50/99] usb: correctly handle Zero Length Packets, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 49/99] arm_gicv3_kvm: kvm_dist_get/put_priority: skip the registers banked by GICR_IPRIORITYR, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 04/99] nbd/client: Fix error messages during NBD_INFO_BLOCK_SIZE, Michael Roth, 2018/07/23
- [Qemu-devel] [PATCH 51/99] usb/dev-mtp: Fix use of uninitialized values, Michael Roth, 2018/07/23