diff mbox series

[PULL,03/25] target/i386: Construct CPUID 2 as stateful iff times > 1

Message ID 20241015141711.528342-4-pbonzini@redhat.com (mailing list archive)
State New
Headers show
Series [PULL,01/25] target/i386: Don't construct a all-zero entry for CPUID[0xD 0x3f] | expand

Commit Message

Paolo Bonzini Oct. 15, 2024, 2:16 p.m. UTC 
From: Xiaoyao Li <xiaoyao.li@intel.com>

When times == 1, the CPUID leaf 2 is not stateful.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Link: https://lore.kernel.org/r/20240814075431.339209-6-xiaoyao.li@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.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 6f6301460d4..77e88165707 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -1838,10 +1838,12 @@  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) {