Gather Data Sampling (GDS) is a side-channel attack using Gather instructions. Some Intel processors will set ARCH_CAP_GDS_NO bit in MSR IA32_ARCH_CAPABILITIES to report that they are not vulnerable to GDS.
Make this bit available to guests. Closes: https://lore.kernel.org/qemu-devel/camgffemg6tnq0n3+4ojagxc8j0oevy60khzekxcbs3lok9v...@mail.gmail.com/ Reported-by: Jack Wang <jinpu.w...@ionos.com> Signed-off-by: Pawan Gupta <pawan.kumar.gu...@linux.intel.com> Tested-by: Jack Wang <jinpu.w...@ionos.com> Tested-by: Daniel Sneddon <daniel.sned...@linux.intel.com> --- v2: Added commit tags v1: https://lore.kernel.org/qemu-devel/c373f3f92b542b738f296d44bb6a916a1cded7bd.1691774049.git.pawan.kumar.gu...@linux.intel.com/ target/i386/cpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 97ad229d8ba3..48709b77689f 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -1155,7 +1155,7 @@ 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, NULL, NULL, + "pbrsb-no", NULL, "gds-no", NULL, NULL, NULL, NULL, NULL, }, .msr = { -- 2.34.1
