Re: [PATCH 3/3] target/i386: Support VMX_VM_EXIT_SAVE_IA32_PERF_GLOBAL_CTRL

[Zhao Liu]

> @@ -4212,7 +4213,8 @@ static const X86CPUDefinition builtin_x86_defs[] = {
>              VMX_VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL |
>              VMX_VM_EXIT_ACK_INTR_ON_EXIT | VMX_VM_EXIT_SAVE_IA32_PAT |
>              VMX_VM_EXIT_LOAD_IA32_PAT | VMX_VM_EXIT_SAVE_IA32_EFER |
> -            VMX_VM_EXIT_LOAD_IA32_EFER | 
> VMX_VM_EXIT_SAVE_VMX_PREEMPTION_TIMER,
> +            VMX_VM_EXIT_LOAD_IA32_EFER | 
> VMX_VM_EXIT_SAVE_VMX_PREEMPTION_TIMER |
> +            VMX_VM_EXIT_SAVE_IA32_PERF_GLOBAL_CTRL,
>          .features[FEAT_VMX_MISC] =
>              MSR_VMX_MISC_STORE_LMA | MSR_VMX_MISC_ACTIVITY_HLT |
>              MSR_VMX_MISC_VMWRITE_VMEXIT,
> @@ -4368,7 +4370,8 @@ static const X86CPUDefinition builtin_x86_defs[] = {
>              VMX_VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL |
>              VMX_VM_EXIT_ACK_INTR_ON_EXIT | VMX_VM_EXIT_SAVE_IA32_PAT |
>              VMX_VM_EXIT_LOAD_IA32_PAT | VMX_VM_EXIT_SAVE_IA32_EFER |
> -            VMX_VM_EXIT_LOAD_IA32_EFER | 
> VMX_VM_EXIT_SAVE_VMX_PREEMPTION_TIMER,
> +            VMX_VM_EXIT_LOAD_IA32_EFER | 
> VMX_VM_EXIT_SAVE_VMX_PREEMPTION_TIMER |
> +            VMX_VM_EXIT_SAVE_IA32_PERF_GLOBAL_CTRL,
>          .features[FEAT_VMX_MISC] =
>              MSR_VMX_MISC_STORE_LMA | MSR_VMX_MISC_ACTIVITY_HLT |
>              MSR_VMX_MISC_VMWRITE_VMEXIT,
> @@ -4511,7 +4514,8 @@ static const X86CPUDefinition builtin_x86_defs[] = {
>              VMX_VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL |
>              VMX_VM_EXIT_ACK_INTR_ON_EXIT | VMX_VM_EXIT_SAVE_IA32_PAT |
>              VMX_VM_EXIT_LOAD_IA32_PAT | VMX_VM_EXIT_SAVE_IA32_EFER |
> -            VMX_VM_EXIT_LOAD_IA32_EFER | 
> VMX_VM_EXIT_SAVE_VMX_PREEMPTION_TIMER,
> +            VMX_VM_EXIT_LOAD_IA32_EFER | 
> VMX_VM_EXIT_SAVE_VMX_PREEMPTION_TIMER |
> +            VMX_VM_EXIT_SAVE_IA32_PERF_GLOBAL_CTRL,
>          .features[FEAT_VMX_MISC] =
>              MSR_VMX_MISC_STORE_LMA | MSR_VMX_MISC_ACTIVITY_HLT |
>              MSR_VMX_MISC_VMWRITE_VMEXIT,

Instead of modifying SPR's CPU model directly, we should introduce a new
version (SapphireRapids-v4), like Skylake-Server-v4 enables
"vmx-eptp-switching".