On 9/25/25 18:17, Zhao Liu wrote:
On Tue, Sep 23, 2025 at 12:41:34PM +0200, Paolo Bonzini wrote:
Date: Tue, 23 Sep 2025 12:41:34 +0200
From: Paolo Bonzini <pbonz...@redhat.com>
Subject: [RFT PATCH v2 0/2] Fix cross migration issue with missing
  features: pdcm, arch-capabilities
X-Mailer: git-send-email 2.51.0

Add two compatibility properties to restore legacy behavior of machine types
prior to QEMU 10.1.  Each of them addresses the two changes to CPUID:

- ARCH_CAPABILITIES should not be autoenabled when the CPU model specifies AMD
   as the vendor

- specifying PDCM without PMU now causes an error, instead of being silently
   dropped in cpu_x86_cpuid.

Note, I only tested this lightly.

Sorry for late.

I found the previous 2 fixes were merged into stable 10.0:

24778b1c7ee7aca9721ed4757b0e0df0c16390f7
3d26cb65c27190e57637644ecf6c96b8c3d246a3

Yes, thanks for noticing it Zhao. Because we cannot apply the machine type changes to 10.0, those two patches have to be reverted.

Paolo


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