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Date:   Wed, 27 May 2020 01:04:23 +0300
From:   "Kirill A. Shutemov" <kirill@shutemov.name>
To:     John Hubbard <jhubbard@nvidia.com>
Cc:     Dave Hansen <dave.hansen@linux.intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
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        Vitaly Kuznetsov <vkuznets@redhat.com>,
        Wanpeng Li <wanpengli@tencent.com>,
        Jim Mattson <jmattson@google.com>,
        Joerg Roedel <joro@8bytes.org>,
        David Rientjes <rientjes@google.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Kees Cook <keescook@chromium.org>,
        Will Drewry <wad@chromium.org>,
        "Edgecombe, Rick P" <rick.p.edgecombe@intel.com>,
        "Kleen, Andi" <andi.kleen@intel.com>, x86@kernel.org,
        kvm@vger.kernel.org, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
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>
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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