47 lines
1.8 KiB
Diff
47 lines
1.8 KiB
Diff
From 3cea2c36571b39a6fa956abe66507c04283ad614 Mon Sep 17 00:00:00 2001
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From: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
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Date: Mon, 14 Aug 2023 21:54:27 -0700
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Subject: [PATCH] target/i386: Export GDS_NO bit to guests
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commit 3a2a1f97ea349745094e789e6b0768dbd92d0dcd upstream.
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Gather Data Sampling (GDS) is a side-channel attack using Gather
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instructions. Some Intel processors will set ARCH_CAP_GDS_NO bit in
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MSR IA32_ARCH_CAPABILITIES to report that they are not vulnerable to
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GDS.
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Make this bit available to guests.
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Intel-SIG: commit 3a2a1f97ea34 ("target/i386: Export GDS_NO bit to guests")
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Backport to export GDS_NO bit to guests(CVE-2022-40982).
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Closes: https://lore.kernel.org/qemu-devel/CAMGffEmG6TNq0n3+4OJAgXc8J0OevY60KHZekXCBs3LoK9vehA@mail.gmail.com/
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Reported-by: Jack Wang <jinpu.wang@ionos.com>
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Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
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Tested-by: Jack Wang <jinpu.wang@ionos.com>
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Tested-by: Daniel Sneddon <daniel.sneddon@linux.intel.com>
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Message-ID: <fde42d81ce454477ca8e27d5429a190b7366fe86.1692074650.git.pawan.kumar.gupta@linux.intel.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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[ Aichun Shi: amend commit log ]
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Signed-off-by: Aichun Shi <aichun.shi@intel.com>
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---
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target/i386/cpu.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/target/i386/cpu.c b/target/i386/cpu.c
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index eb911b12fa..58124071da 100644
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--- a/target/i386/cpu.c
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+++ b/target/i386/cpu.c
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@@ -1004,7 +1004,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
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NULL, "sbdr-ssdp-no", "fbsdp-no", "psdp-no",
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NULL, "fb-clear", NULL, NULL,
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NULL, NULL, NULL, NULL,
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- "pbrsb-no", NULL, NULL, NULL,
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+ "pbrsb-no", NULL, "gds-no", NULL,
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NULL, NULL, NULL, NULL,
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},
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.msr = {
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--
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2.27.0
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