diff mbox series

[5/9] i386/cpu: Construct CPUID 2 as stateful iff times > 1

Message ID 20240814075431.339209-6-xiaoyao.li@intel.com (mailing list archive)
State New, archived
Headers show
Series Misc patches for x86 CPUID | expand

Commit Message

Xiaoyao Li Aug. 14, 2024, 7:54 a.m. UTC 
When times == 1, the CPUID leaf 2 is not stateful.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
 target/i386/kvm/kvm.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index c168ff5691df..6618259f265c 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -1818,10 +1818,12 @@  static uint32_t kvm_x86_build_cpuid(CPUX86State *env,
             int times;
 
             c->function = i;
-            c->flags = KVM_CPUID_FLAG_STATEFUL_FUNC |
-                       KVM_CPUID_FLAG_STATE_READ_NEXT;
             cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx);
             times = c->eax & 0xff;
+            if (times > 1) {
+                c->flags = KVM_CPUID_FLAG_STATEFUL_FUNC |
+                           KVM_CPUID_FLAG_STATE_READ_NEXT;
+            }
 
             for (j = 1; j < times; ++j) {
                 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) {