On 3/13/2024 10:53 PM, Pawan Gupta wrote:
Register File Data Sampling (RFDS) is a CPU side-channel vulnerability
that may expose stale register value. CPUs that set RFDS_NO bit in MSR
IA32_ARCH_CAPABILITIES indicate that they are not vulnerable to RFDS.
Similarly, RFDS_CLEAR indicates that CPU is affected by RFDS, and has
the microcode to help mitigate RFDS.
Make RFDS_CLEAR and RFDS_NO bits available to guests.
What's the status of KVM part?
Signed-off-by: Pawan Gupta <pawan.kumar.gu...@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 9a210d8d9290..693a5e0fb2ce 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1158,8 +1158,8 @@ 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, "gds-no", NULL,
- NULL, NULL, NULL, NULL,
+ "pbrsb-no", NULL, "gds-no", "rfds-no",
+ "rfds-clear", NULL, NULL, NULL,
},
.msr = {
.index = MSR_IA32_ARCH_CAPABILITIES,
base-commit: a1932d7cd6507d4d9db2044a54731fff3e749bac
