* [PATCH] target/i386: Export MSR_ARCH_CAPABILITIES bits to guests
@ 2023-06-23 20:26 Pawan Gupta
2023-06-26 11:11 ` Paolo Bonzini
0 siblings, 1 reply; 2+ messages in thread
From: Pawan Gupta @ 2023-06-23 20:26 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Chao Gao
On Intel CPUs there are certain bits in MSR_ARCH_CAPABILITIES that
indicates if the CPU is not affected by a vulnerability. Without these
bits guests may try to deploy the mitigation even if the CPU is not
affected.
Export the bits to guests that indicate immunity to hardware
vulnerabilities.
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
---
target/i386/cpu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 1242bd541a53..66d6062aea7c 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1049,10 +1049,10 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
"rdctl-no", "ibrs-all", "rsba", "skip-l1dfl-vmentry",
"ssb-no", "mds-no", "pschange-mc-no", "tsx-ctrl",
"taa-no", NULL, NULL, NULL,
- NULL, NULL, NULL, NULL,
+ NULL, "sbdr-ssdp-no", "fbsdp-no", "psdp-no",
NULL, "fb-clear", NULL, NULL,
NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL,
+ "pbrsb-no", NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
},
.msr = {
--
2.34.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] target/i386: Export MSR_ARCH_CAPABILITIES bits to guests
2023-06-23 20:26 [PATCH] target/i386: Export MSR_ARCH_CAPABILITIES bits to guests Pawan Gupta
@ 2023-06-26 11:11 ` Paolo Bonzini
0 siblings, 0 replies; 2+ messages in thread
From: Paolo Bonzini @ 2023-06-26 11:11 UTC (permalink / raw)
To: Pawan Gupta; +Cc: qemu-devel, Chao Gao
Queued, thanks.
Paolo
^ permalink raw reply [flat|nested] 2+ messages in thread
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