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Shutemov" To: John Hubbard Cc: Dave Hansen , Andy Lutomirski , Peter Zijlstra , Paolo Bonzini , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , David Rientjes , Andrea Arcangeli , Kees Cook , Will Drewry , "Edgecombe, Rick P" , "Kleen, Andi" , x86@kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: Re: [RFC 07/16] KVM: mm: Introduce VM_KVM_PROTECTED Message-ID: <20200526220423.7gkyam4tp67gdvp5@box> References: <20200522125214.31348-1-kirill.shutemov@linux.intel.com> <20200522125214.31348-8-kirill.shutemov@linux.intel.com> <29a1d089-ab37-321c-0a01-11801a16a742@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <29a1d089-ab37-321c-0a01-11801a16a742@nvidia.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, May 25, 2020 at 11:40:01PM -0700, John Hubbard wrote: > On 2020-05-22 05:52, Kirill A. Shutemov wrote: > ... > > @@ -2773,6 +2780,7 @@ struct page *follow_page(struct vm_area_struct *vma, unsigned long address, > > #define FOLL_LONGTERM 0x10000 /* mapping lifetime is indefinite: see below */ > > #define FOLL_SPLIT_PMD 0x20000 /* split huge pmd before returning */ > > #define FOLL_PIN 0x40000 /* pages must be released via unpin_user_page */ > > +#define FOLL_KVM 0x80000 /* access to VM_KVM_PROTECTED VMAs */ > > I grabbed 0x80000 already, for FOLL_FAST_ONLY. :) Let's see who getting upstream first :P (Spoiler: you) -- Kirill A. Shutemov