diff mbox series

[Stable-8.2.2,51/60] i386/cpuid: Decrease cpuid_i when skipping CPUID leaf 1F

Message ID 20240221082058.2141850-51-mjt@tls.msk.ru
State New
Headers show
Series Patch Round-up for stable 8.2.2, freeze on 2024-03-02 | expand

Commit Message

Michael Tokarev Feb. 21, 2024, 8:20 a.m. UTC 
From: Xiaoyao Li <xiaoyao.li@intel.com>

Existing code misses a decrement of cpuid_i when skip leaf 0x1F.
There's a blank CPUID entry(with leaf, subleaf as 0, and all fields
stuffed 0s) left in the CPUID array.

It conflicts with correct CPUID leaf 0.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by:Yang Weijiang <weijiang.yang@intel.com>
Message-ID: <20240125024016.2521244-2-xiaoyao.li@intel.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 10f92799af8ba3c3cef2352adcd4780f13fbab31)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
diff mbox series

Patch

diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index 4ce80555b4..e68eb8f5e6 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -1914,6 +1914,7 @@  int kvm_arch_init_vcpu(CPUState *cs)
         }
         case 0x1f:
             if (env->nr_dies < 2) {
+                cpuid_i--;
                 break;
             }
             /* fallthrough */