linux-kernel - Re: [PATCH v7 0/4] MIPS: page fault handling optimization

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20200527113256.GA13537@alpha.franken.de>
Date:   Wed, 27 May 2020 13:32:56 +0200
From:   Thomas Bogendoerfer <tsbogend@...ha.franken.de>
To:     Bibo Mao <maobibo@...ngson.cn>
Cc:     Jiaxun Yang <jiaxun.yang@...goat.com>,
        Huacai Chen <chenhc@...ote.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Paul Burton <paulburton@...nel.org>,
        Dmitry Korotin <dkorotin@...ecomp.com>,
        Philippe Mathieu-Daudé <f4bug@...at.org>,
        Stafford Horne <shorne@...il.com>,
        Steven Price <steven.price@....com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        "Maciej W. Rozycki" <macro@....com>, linux-mm@...ck.org,
        David Hildenbrand <david@...hat.com>
Subject: Re: [PATCH v7 0/4] MIPS: page fault handling optimization

On Wed, May 27, 2020 at 10:25:16AM +0800, Bibo Mao wrote:
> V7:
> - define function flush_tlb_fix_spurious_fault as inline rather
>   than macro
> V6:
> - Add update_mmu_tlb function as empty on all platform except mips
>   system, we use this function to update local tlb for page fault
>   smp-race handling
> V5:
> - define update_mmu_cache function specified on MIPS platform, and
>   add page fault smp-race stats info
> V4:
> - add pte_sw_mkyoung function to implement readable privilege, and
>   this function is  only in effect on MIPS system.
> - add page valid bit judgement in function pte_modify
> V3:
> - add detailed changelog, modify typo issue in patch V2
> v2:
> - split flush_tlb_fix_spurious_fault and tlb update into two patches
> - comments typo modification
> - separate tlb update and add pte readable privilege into two patches
> 
> Bibo Mao (4):
>   MIPS: Do not flush tlb page when updating PTE entry
>   mm/memory.c: Update local TLB if PTE entry exists
>   mm/memory.c: Add memory read privilege on page fault handling
>   MIPS: mm: add page valid judgement in function pte_modify
> 
>  arch/mips/include/asm/pgtable.h | 37 +++++++++++++++++++++++++++++++++++--
>  include/asm-generic/pgtable.h   | 33 +++++++++++++++++++++++++++++++++
>  mm/memory.c                     | 30 ++++++++++++++++++++++--------
>  3 files changed, 90 insertions(+), 10 deletions(-)

series applied to mips-next.

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]