DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com E149DC0587F5
Subject: Re: [PATCH v3 4/5] KVM: MMU: Add 5 level EPT & Shadow page table
 support.
To: Yu Zhang <yu.c.zhang@linux.intel.com>, kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, rkrcmar@redhat.com, tglx@linutronix.de,
        mingo@redhat.com, hpa@zytor.com, xiaoguangrong@tencent.com,
        joro@8bytes.org
References: <1503577676-12345-1-git-send-email-yu.c.zhang@linux.intel.com>
 <1503577676-12345-5-git-send-email-yu.c.zhang@linux.intel.com>
From: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <6d55fa19-799d-99b1-6992-6f59f0929ca6@redhat.com>
Date: Thu, 24 Aug 2017 15:42:34 +0200
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On 24/08/2017 14:27, Yu Zhang wrote:
>  	/* Update physical-address width */
>  	vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu);
>  
> +#ifdef CONFIG_X86_64
> +	if (vcpu->arch.maxphyaddr > 48)
> +		kvm_mmu_reset_context(vcpu);
> +#endif

I think CONFIG_X86_64 is not necessary to have maxphyaddr>48?

Paolo

>  	kvm_pmu_refresh(vcpu);
>  	return 0;
>  }