From: Ewan Hai <ewanhai...@zhaoxin.com> The model number was mistakenly set to 0x0b (11) in commit ff04bc1ac4. The correct value is 0x5b. This mistake occurred because the extended model bits in cpuid[eax=0x1].eax were overlooked, and only the base model was used.
Using the wrong model number can affect guest behavior. One known issue is that vPMU (which relies on the model number) may fail to operate correctly. This patch corrects the model field by introducing a new vCPU version. Fixes: ff04bc1ac4 ("target/i386: Introduce Zhaoxin Yongfeng CPU model") Signed-off-by: Ewan Hai <ewanhai...@zhaoxin.com> Link: https://lore.kernel.org/r/20250414075342.411626-1-ewanhai...@zhaoxin.com Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> --- target/i386/cpu.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 1b64ceaaba4..3fb1ec62da1 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -5621,6 +5621,18 @@ static const X86CPUDefinition builtin_x86_defs[] = { .features[FEAT_VMX_VMFUNC] = MSR_VMX_VMFUNC_EPT_SWITCHING, .xlevel = 0x80000008, .model_id = "Zhaoxin YongFeng Processor", + .versions = (X86CPUVersionDefinition[]) { + { .version = 1 }, + { + .version = 2, + .note = "with the correct model number", + .props = (PropValue[]) { + { "model", "0x5b" }, + { /* end of list */ } + } + }, + { /* end of list */ } + } }, }; -- 2.49.0