From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Cc: balaton@eik.bme.hu,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
Jack Wang <jinpu.wang@ionos.com>,
Daniel Sneddon <daniel.sneddon@linux.intel.com>
Subject: [PULL 2/9] target/i386: Export GDS_NO bit to guests
Date: Fri, 22 Sep 2023 17:42:21 +0200 [thread overview]
Message-ID: <20230922154228.304933-3-pbonzini@redhat.com> (raw)
In-Reply-To: <20230922154228.304933-1-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 15:43 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-22 15:42 [PULL v2 0/9] i386, audio changes for 2023-09-22 Paolo Bonzini
2023-09-22 15:42 ` [PULL 1/9] target/i386: enumerate bit 56 of MSR_IA32_VMX_BASIC Paolo Bonzini
2023-09-22 15:42 ` Paolo Bonzini [this message]
2023-09-22 15:42 ` [PULL 3/9] qemu/timer: Add host ticks function for RISC-V Paolo Bonzini
2023-09-22 15:42 ` [PULL 4/9] hw/input/tsc210x: Extract common init code into new function Paolo Bonzini
2023-09-22 15:42 ` [PULL 5/9] hw/audio: Simplify hda audio init Paolo Bonzini
2023-09-22 15:42 ` [PULL 6/9] hw/audio/lm4549: Add errp error reporting to init function Paolo Bonzini
2023-09-22 15:42 ` [PULL 7/9] hw/display/xlnx_dp.c: Add audiodev property Paolo Bonzini
2023-09-22 15:42 ` [PULL 8/9] tests/qtest: Specify audiodev= and -audiodev Paolo Bonzini
2023-09-22 15:42 ` [PULL 9/9] vl: recognize audiodev groups in configuration files Paolo Bonzini
2023-09-25 15:36 ` [PULL v2 0/9] i386, audio changes for 2023-09-22 Stefan Hajnoczi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20230922154228.304933-3-pbonzini@redhat.com \
--to=pbonzini@redhat.com \
--cc=balaton@eik.bme.hu \
--cc=daniel.sneddon@linux.intel.com \
--cc=jinpu.wang@ionos.com \
--cc=pawan.kumar.gupta@linux.intel.com \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).