From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Cc: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
Jack Wang <jinpu.wang@ionos.com>,
Daniel Sneddon <daniel.sneddon@linux.intel.com>
Subject: [PULL 02/12] target/i386: Export GDS_NO bit to guests
Date: Fri, 22 Sep 2023 11:31:15 +0200 [thread overview]
Message-ID: <20230922093126.264016-3-pbonzini@redhat.com> (raw)
In-Reply-To: <20230922093126.264016-1-pbonzini@redhat.com>
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
next prev parent reply other threads:[~2023-09-22 9:32 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-22 9:31 [PULL 00/12] Audio, i386 patches for 2022-09-22 Paolo Bonzini
2023-09-22 9:31 ` [PULL 01/12] target/i386: enumerate bit 56 of MSR_IA32_VMX_BASIC Paolo Bonzini
2023-09-22 9:31 ` Paolo Bonzini [this message]
2023-09-22 9:31 ` [PULL 03/12] qemu/timer: Add host ticks function for RISC-V Paolo Bonzini
2023-09-22 9:31 ` [PULL 04/12] audio: remove QEMU_AUDIO_* and -audio-help support Paolo Bonzini
2023-09-22 9:31 ` [PULL 05/12] hw/input/tsc210x: Extract common init code into new function Paolo Bonzini
2023-09-22 9:31 ` [PULL 06/12] hw/audio: Simplify hda audio init Paolo Bonzini
2023-09-22 9:31 ` [PULL 07/12] hw/audio/lm4549: Add errp error reporting to init function Paolo Bonzini
2023-09-22 9:31 ` [PULL 08/12] hw/display/xlnx_dp.c: Add audiodev property Paolo Bonzini
2023-09-22 9:31 ` [PULL 09/12] tests/qtest: Specify audiodev= and -audiodev Paolo Bonzini
2023-09-22 9:31 ` [PULL 10/12] audio/spiceaudio: Fail initialisation when not using spice Paolo Bonzini
2023-09-22 9:31 ` [PULL 11/12] ui/vnc: Require audiodev= to enable audio Paolo Bonzini
2023-09-22 9:31 ` [PULL 12/12] audio: Require AudioState in AUD_add_capture Paolo Bonzini
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