* [PATCH v2] target/i386: Export GDS_NO bit to guests
@ 2023-08-15 4:54 Pawan Gupta
2023-08-15 5:44 ` Xiaoyao Li
0 siblings, 1 reply; 3+ messages in thread
From: Pawan Gupta @ 2023-08-15 4:54 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, tao1.su, xiaoyao.li, Yu Zhang, Jinpu Wang
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>
---
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 = {
--
2.34.1
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH v2] target/i386: Export GDS_NO bit to guests
2023-08-15 4:54 [PATCH v2] target/i386: Export GDS_NO bit to guests Pawan Gupta
@ 2023-08-15 5:44 ` Xiaoyao Li
2023-09-14 6:22 ` Jinpu Wang
0 siblings, 1 reply; 3+ messages in thread
From: Xiaoyao Li @ 2023-08-15 5:44 UTC (permalink / raw)
To: Pawan Gupta, qemu-devel; +Cc: Paolo Bonzini, tao1.su, Yu Zhang, Jinpu Wang
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 = {
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH v2] target/i386: Export GDS_NO bit to guests
2023-08-15 5:44 ` Xiaoyao Li
@ 2023-09-14 6:22 ` Jinpu Wang
0 siblings, 0 replies; 3+ messages in thread
From: Jinpu Wang @ 2023-09-14 6:22 UTC (permalink / raw)
To: Paolo Bonzini; +Cc: Pawan Gupta, Xiaoyao Li, qemu-devel, tao1.su, Yu Zhang
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 = {
>
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-09-14 6:23 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2023-08-15 4:54 [PATCH v2] target/i386: Export GDS_NO bit to guests Pawan Gupta
2023-08-15 5:44 ` Xiaoyao Li
2023-09-14 6:22 ` Jinpu Wang
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.