target/i386: Make ITS_NO available to guests

[PATCH] target/i386: Make ITS_NO available to guests

Pawan Gupta posted 1 patch 6 months, 1 week ago

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Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/8c1797e488b42650f62d816f25c58726eb522fad.1745946029.git.pawan.kumar.gupta@linux.intel.com

Maintainers: Paolo Bonzini <pbonzini@redhat.com>, Zhao Liu <zhao1.liu@intel.com>

target/i386/cpu.c | 8 ++++++++
1 file changed, 8 insertions(+)

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[PATCH] target/i386: Make ITS_NO available to guests

Posted by Pawan Gupta 6 months, 1 week ago

When a system is not affected by Indirect Target Selection (ITS)
vulnerability, VMMs set ITS_NO bit in MSR IA32_ARCH_CAPABILITIES to let the
guest know that it is not affected.

Make it available to guests.

Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
---
 target/i386/cpu.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 1b64ceaaba46..89807ee1aace 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1370,6 +1370,14 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             "bhi-no", NULL, NULL, NULL,
             "pbrsb-no", NULL, "gds-no", "rfds-no",
             "rfds-clear", NULL, NULL, NULL,
+            NULL, NULL, NULL, NULL,
+            NULL, NULL, NULL, NULL,
+            NULL, NULL, NULL, NULL,
+            NULL, NULL, NULL, NULL,
+            NULL, NULL, NULL, NULL,
+            NULL, NULL, NULL, NULL,
+            NULL, NULL, NULL, NULL,
+            NULL, NULL, "its-no", NULL,
         },
         .msr = {
             .index = MSR_IA32_ARCH_CAPABILITIES,

base-commit: 56c6e249b6988c1b6edc2dd34ebb0f1e570a1365
-- 
2.34.1

Re: [PATCH] target/i386: Make ITS_NO available to guests

Posted by Paolo Bonzini 6 months, 1 week ago

Queued, thanks.

Paolo