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[PULL 2/9] target/i386: Export GDS_NO bit to guests
From: |
Paolo Bonzini |
Subject: |
[PULL 2/9] target/i386: Export GDS_NO bit to guests |
Date: |
Fri, 22 Sep 2023 17:42:21 +0200 |
From: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Gather Data Sampling (GDS) is a side-channel attack using Gather
instructions. Some Intel processors will set ARCH_CAP_GDS_NO bit in
MSR IA32_ARCH_CAPABILITIES to report that they are not vulnerable to
GDS.
Make this bit available to guests.
Closes:
https://lore.kernel.org/qemu-devel/CAMGffEmG6TNq0n3+4OJAgXc8J0OevY60KHZekXCBs3LoK9vehA@mail.gmail.com/
Reported-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Tested-by: Jack Wang <jinpu.wang@ionos.com>
Tested-by: Daniel Sneddon <daniel.sneddon@linux.intel.com>
Message-ID:
<fde42d81ce454477ca8e27d5429a190b7366fe86.1692074650.git.pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
target/i386/cpu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index d48607b4e1e..f9e51a9d87e 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1155,7 +1155,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
NULL, "sbdr-ssdp-no", "fbsdp-no", "psdp-no",
NULL, "fb-clear", NULL, NULL,
NULL, NULL, NULL, NULL,
- "pbrsb-no", NULL, NULL, NULL,
+ "pbrsb-no", NULL, "gds-no", NULL,
NULL, NULL, NULL, NULL,
},
.msr = {
--
2.41.0
- [PULL v2 0/9] i386, audio changes for 2023-09-22, Paolo Bonzini, 2023/09/22
- [PULL 1/9] target/i386: enumerate bit 56 of MSR_IA32_VMX_BASIC, Paolo Bonzini, 2023/09/22
- [PULL 2/9] target/i386: Export GDS_NO bit to guests,
Paolo Bonzini <=
- [PULL 3/9] qemu/timer: Add host ticks function for RISC-V, Paolo Bonzini, 2023/09/22
- [PULL 4/9] hw/input/tsc210x: Extract common init code into new function, Paolo Bonzini, 2023/09/22
- [PULL 5/9] hw/audio: Simplify hda audio init, Paolo Bonzini, 2023/09/22
- [PULL 6/9] hw/audio/lm4549: Add errp error reporting to init function, Paolo Bonzini, 2023/09/22
- [PULL 7/9] hw/display/xlnx_dp.c: Add audiodev property, Paolo Bonzini, 2023/09/22
- [PULL 8/9] tests/qtest: Specify audiodev= and -audiodev, Paolo Bonzini, 2023/09/22
- [PULL 9/9] vl: recognize audiodev groups in configuration files, Paolo Bonzini, 2023/09/22
- Re: [PULL v2 0/9] i386, audio changes for 2023-09-22, Stefan Hajnoczi, 2023/09/25