| Message ID | fde42d81ce454477ca8e27d5429a190b7366fe86.1692074650.git.pawan.kumar.gupta@linux.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] target/i386: Export GDS_NO bit to guests | expand |
On 8/15/2023 12:54 PM, Pawan Gupta wrote: > 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+4OJAgXc8J0OevY60KHZekXCBs3LoK9vehA@mail.gmail.com/ > Reported-by: Jack Wang <jinpu.wang@ionos.com> > Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> > Tested-by: Jack Wang <jinpu.wang@ionos.com> > Tested-by: Daniel Sneddon <daniel.sneddon@linux.intel.com> Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com> > --- > v2: Added commit tags > > v1: https://lore.kernel.org/qemu-devel/c373f3f92b542b738f296d44bb6a916a1cded7bd.1691774049.git.pawan.kumar.gupta@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 = {
Hi Paolo, Ping! Thx! On Tue, Aug 15, 2023 at 7:44 AM Xiaoyao Li <xiaoyao.li@intel.com> wrote: > > On 8/15/2023 12:54 PM, Pawan Gupta wrote: > > 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+4OJAgXc8J0OevY60KHZekXCBs3LoK9vehA@mail.gmail.com/ > > Reported-by: Jack Wang <jinpu.wang@ionos.com> > > Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> > > Tested-by: Jack Wang <jinpu.wang@ionos.com> > > Tested-by: Daniel Sneddon <daniel.sneddon@linux.intel.com> > > Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com> > > > --- > > v2: Added commit tags > > > > v1: https://lore.kernel.org/qemu-devel/c373f3f92b542b738f296d44bb6a916a1cded7bd.1691774049.git.pawan.kumar.gupta@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 = { >
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 = {