From: Pawan Gupta Date: Wed, 13 Mar 2024 14:53:23 +0000 (-0700) Subject: target/i386: Export RFDS bit to guests X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=41bdd9812863c150284a9339a048ed88c40f4df7;p=qemu.git 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 Reviewed-by: Xiaoyao Li Reviewed-by: Zhao Liu Message-ID: <9a38877857392b5c2deae7e7db1b170d15510314.1710341348.git.pawan.kumar.gupta@linux.intel.com> Signed-off-by: Paolo Bonzini --- diff --git a/target/i386/cpu.c b/target/i386/cpu.c index c295491d8a..eda15b0d4c 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,