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| author | Pawan Gupta <pawan.kumar.gupta@linux.intel.com> | 2024-03-13 07:53:23 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-04-23 17:35:25 +0200 |
| commit | 41bdd9812863c150284a9339a048ed88c40f4df7 (patch) | |
| tree | 34e2dea40ed21d067339d84213d832452091000f | |
| parent | 6e82d3b6220777667968a04c87e1667f164ebe88 (diff) | |
| download | qemu-41bdd9812863c150284a9339a048ed88c40f4df7.zip qemu-41bdd9812863c150284a9339a048ed88c40f4df7.tar.gz qemu-41bdd9812863c150284a9339a048ed88c40f4df7.tar.bz2 | |
target/i386: Export RFDS bit to guests
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.
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Message-ID: <9a38877857392b5c2deae7e7db1b170d15510314.1710341348.git.pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | target/i386/cpu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/target/i386/cpu.c b/target/i386/cpu.c index c295491..eda15b0 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, |