linux-kernel - Re: [PATCH 09/12] KVM: MMU: look for a cached PGD when going from 32-bit to 64-bit

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Message-ID: <8160cf73-537a-9cd7-bb61-cca29fb0ebcb@redhat.com>
Date:   Fri, 11 Feb 2022 11:09:01 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        vkuznets@...hat.com, mlevitsk@...hat.com, dmatlack@...gle.com
Subject: Re: [PATCH 09/12] KVM: MMU: look for a cached PGD when going from
 32-bit to 64-bit

On 2/11/22 02:37, Sean Christopherson wrote:
>
>> 	if (VALID_PAGE(mmu->root.hpa) && mmu->root.hpa == __pa(mmu->pae_root))
> Gah, that's wrong too, it will allow the pml4_root case.*sigh*   I'm fine punting
> this until the special roots are less special, pml5_root is completely broken
> anyways.

Ok, I'll look at your comments on Jiangshan's series.

Paolo