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Subject: Re: [PATCH v40 10/24] mm: Add 'mprotect' hook to struct
 vm_operations_struct
To:     Borislav Petkov <bp@alien8.de>,
        Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc:     x86@kernel.org, linux-sgx@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Sean Christopherson <sean.j.christopherson@intel.com>,
        linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
        Matthew Wilcox <willy@infradead.org>,
        Jethro Beekman <jethro@fortanix.com>,
        Darren Kenny <darren.kenny@oracle.com>,
        andriy.shevchenko@linux.intel.com, asapek@google.com,
        cedric.xing@intel.com, chenalexchen@google.com,
        conradparker@google.com, cyhanish@google.com,
        haitao.huang@intel.com, kai.huang@intel.com, kai.svahn@intel.com,
        kmoy@google.com, ludloff@google.com, luto@kernel.org,
        nhorman@redhat.com, npmccallum@redhat.com, puiterwijk@redhat.com,
        rientjes@google.com, tglx@linutronix.de, yaozhangx@google.com,
        mikko.ylinen@intel.com, Mel Gorman <mgorman@suse.de>
References: <20201104145430.300542-1-jarkko.sakkinen@linux.intel.com>
 <20201104145430.300542-11-jarkko.sakkinen@linux.intel.com>
 <20201105160424.GC25636@zn.tnic>
From:   Dave Hansen <dave.hansen@intel.com>
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Message-ID: <899f8770-8b07-1622-4da3-bf2c1b5cda0d@intel.com>
Date:   Thu, 5 Nov 2020 09:33:17 -0800
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In-Reply-To: <20201105160424.GC25636@zn.tnic>
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Precedence: bulk

On 11/5/20 8:04 AM, Borislav Petkov wrote:
...
>> Add a vm_ops->mprotect() hook so that mprotect() operations which are
>> inconsistent with any page's stashed intent can be rejected by the driver.
>>
>> Cc: linux-mm@kvack.org
>> Cc: Andrew Morton <akpm@linux-foundation.org>
>> Cc: Matthew Wilcox <willy@infradead.org>
>> Acked-by: Jethro Beekman <jethro@fortanix.com>
>> Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
>> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
>> Co-developed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
>> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
>> ---
>>  include/linux/mm.h | 3 +++
>>  mm/mprotect.c      | 5 ++++-
>>  2 files changed, 7 insertions(+), 1 deletion(-)
> This needs an ACK from an mm person.

For what it's worth:

Acked-by: Dave Hansen <dave.hansen@intel.com>

The top 5 git-blamees in terms of mprotect.c at the moment are:

     45 Andi Kleen
     50 Peter Xu
     81 Dave Hansen
     90 Mel Gorman
    209 Linus Torvalds