linux-kernel - Re: [PATCH] KVM: nVMX: don't reset kvm mmu twice

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Message-ID: <20170314203912.GC14790@potion>
Date:   Tue, 14 Mar 2017 21:39:12 +0100
From:   Radim Krčmář <rkrcmar@...hat.com>
To:     Wanpeng Li <kernellwp@...il.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Wanpeng Li <wanpeng.li@...mail.com>
Subject: Re: [PATCH] KVM: nVMX: don't reset kvm mmu twice

2017-03-12 00:53-0800, Wanpeng Li:
> From: Wanpeng Li <wanpeng.li@...mail.com>
> 
> kvm mmu is reset once successfully loading CR3 as part of emulating vmentry 
> in nested_vmx_load_cr3(). We should not reset kvm mmu twice.
> 
> Cc: Paolo Bonzini <pbonzini@...hat.com>
> Cc: Radim Krčmář <rkrcmar@...hat.com>
> Signed-off-by: Wanpeng Li <wanpeng.li@...mail.com>
> ---

Queued, thanks.

>  arch/x86/kvm/vmx.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index 98e82ee..bca8d7a 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -10286,8 +10286,6 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
>  				entry_failure_code))
>  		return 1;
>  
> -	kvm_mmu_reset_context(vcpu);
> -
>  	if (!enable_ept)
>  		vcpu->arch.walk_mmu->inject_page_fault = vmx_inject_page_fault_nested;
>  
> -- 
> 2.7.4
>