linux-kernel - Re: [PATCHv6 00/11] Linear Address Masking enabling

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Message-ID: <YvpNlqnxRkeZ/Tfi@worktop.programming.kicks-ass.net>
Date:   Mon, 15 Aug 2022 15:43:50 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>, x86@...nel.org,
        Kostya Serebryany <kcc@...gle.com>,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Alexander Potapenko <glider@...gle.com>,
        Taras Madan <tarasmadan@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        "H . J . Lu" <hjl.tools@...il.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv6 00/11] Linear Address Masking enabling

On Mon, Aug 15, 2022 at 07:17:52AM +0300, Kirill A. Shutemov wrote:

> Kirill A. Shutemov (7):
>   x86/mm: Fix CR3_ADDR_MASK
>   x86: CPUID and CR3/CR4 flags for Linear Address Masking
>   mm: Pass down mm_struct to untagged_addr()
>   x86/mm: Handle LAM on context switch
>   x86/uaccess: Provide untagged_addr() and remove tags before address
>     check
>   x86/mm: Provide arch_prctl() interface for LAM
>   x86: Expose untagging mask in /proc/$PID/arch_status

Over-all these are not terrible.. I've replied with a few nits; with
those fixed:

Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>