linux-kernel - Re: [PATCH] KVM: nVMX: expose "load IA32_PERF_GLOBAL

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Message-ID: <7fea1f06-9abb-cdd1-9cb9-8655fe207e96@oracle.com>
Date:   Thu, 21 Nov 2019 10:42:18 -0800
From:   Krish Sadhukhan <krish.sadhukhan@...cle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     Oliver Upton <oupton@...gle.com>
Subject: Re: [PATCH] KVM: nVMX: expose "load IA32_PERF_GLOBAL_CTRL" controls


On 11/21/19 6:29 AM, Paolo Bonzini wrote:
> These controls were added by the recent commit 03a8871add95 ("KVM:
> nVMX: Expose load IA32_PERF_GLOBAL_CTRL VM-{Entry,Exit} control",
> 2019-11-13), so we should advertise them to userspace from
> KVM_GET_MSR_FEATURE_INDEX_LIST, as well.
>
> Cc: Oliver Upton <oupton@...gle.com>
> Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
> ---
>   arch/x86/kvm/vmx/nested.c | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
> index 4aea7d304beb..4b4ce6a804ff 100644
> --- a/arch/x86/kvm/vmx/nested.c
> +++ b/arch/x86/kvm/vmx/nested.c
> @@ -5982,6 +5982,7 @@ void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, u32 ept_caps,
>   #ifdef CONFIG_X86_64
>   		VM_EXIT_HOST_ADDR_SPACE_SIZE |
>   #endif
> +		VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL |
>   		VM_EXIT_LOAD_IA32_PAT | VM_EXIT_SAVE_IA32_PAT;
>   	msrs->exit_ctls_high |=
>   		VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR |
> @@ -6001,6 +6002,7 @@ void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, u32 ept_caps,
>   #ifdef CONFIG_X86_64
>   		VM_ENTRY_IA32E_MODE |
>   #endif
> +		VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL |
>   		VM_ENTRY_LOAD_IA32_PAT;
>   	msrs->entry_ctls_high |=
>   		(VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR | VM_ENTRY_LOAD_IA32_EFER);
Reviewed-by: Krish Sadhukhan <krish.sadhukhan@...cle.com>