From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F945C32767 for ; Mon, 6 Jan 2020 03:34:06 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A767A2072C for ; Mon, 6 Jan 2020 03:34:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A767A2072C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 47rh2328D0zDqDQ for ; Mon, 6 Jan 2020 14:34:03 +1100 (AEDT) Received: from ozlabs.org (bilbo.ozlabs.org [203.11.71.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 47rgzQ03Q6zDq9W for ; Mon, 6 Jan 2020 14:31:46 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ellerman.id.au header.i=@ellerman.id.au header.b="PseaXQkA"; dkim-atps=neutral Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 47rgzM5PMRz9sNH; Mon, 6 Jan 2020 14:31:43 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ellerman.id.au; s=201909; t=1578281504; bh=XeP8e7qXes4HkHyMRiVW9bZkBg9wHSfCUbqH7aV7fWI=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=PseaXQkADJFYGx4SaZsY8sR8oWICr+mRYyYr5fMd+fnxepINCrjznL1PLsh6Nvlcn C1u/dXFf4MPhZL0D3/iqEg9lgO6lddEzi7k8X0HlcU7EhFoWF8V4KqQ1Ld2vrgfOmF 8xJRGQoZEGXrYoUV/poOaGavJ6HBQ2pGlgOVg5ya1DWljIM/GdntvZDnnQIq1d0vrn hTzu3/amT42926Hf0wiuK4vD84ztJ5fo4OrAw0rbPyiT9uWXu/81Da9MUXvFi6V7H1 lLmTIKEcYguwgRIibijKxb9zOk2IpkUFVNbaOcqwzS7oP1rsO6pmo5ALTydI/FzVoh lt/4slorVh1DA== From: Michael Ellerman To: Mike Rapoport Subject: Re: [PATCH] powerpc: add support for folded p4d page tables In-Reply-To: <20200102081059.GA12063@rapoport-lnx> References: <20191209150908.6207-1-rppt@kernel.org> <20200102081059.GA12063@rapoport-lnx> Date: Mon, 06 Jan 2020 14:31:41 +1100 Message-ID: <87v9ppi7ky.fsf@mpe.ellerman.id.au> MIME-Version: 1.0 Content-Type: text/plain X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org, Mike Rapoport , linux-mm@kvack.org, Paul Mackerras , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Mike Rapoport writes: > Any updates on this? It's very ... big, and kind of intrusive. It's not an improvement as far as the powerpc code's readability is concerned. I assume the plan is that the 5-level hack can eventually be removed and so this conversion is a prerequisite for that? cheers > On Mon, Dec 09, 2019 at 05:09:08PM +0200, Mike Rapoport wrote: >> From: Mike Rapoport >> >> Implement primitives necessary for the 4th level folding, add walks of p4d >> level where appropriate and replace 5level-fixup.h with pgtable-nop4d.h. >> >> Signed-off-by: Mike Rapoport >> --- >> arch/powerpc/include/asm/book3s/32/pgtable.h | 1 - >> arch/powerpc/include/asm/book3s/64/hash.h | 4 +- >> arch/powerpc/include/asm/book3s/64/pgalloc.h | 4 +- >> arch/powerpc/include/asm/book3s/64/pgtable.h | 58 ++++++++++-------- >> arch/powerpc/include/asm/book3s/64/radix.h | 6 +- >> arch/powerpc/include/asm/nohash/32/pgtable.h | 1 - >> arch/powerpc/include/asm/nohash/64/pgalloc.h | 2 +- >> .../include/asm/nohash/64/pgtable-4k.h | 32 +++++----- >> arch/powerpc/include/asm/nohash/64/pgtable.h | 6 +- >> arch/powerpc/include/asm/pgtable.h | 8 +++ >> arch/powerpc/kvm/book3s_64_mmu_radix.c | 59 ++++++++++++++++--- >> arch/powerpc/lib/code-patching.c | 7 ++- >> arch/powerpc/mm/book3s32/mmu.c | 2 +- >> arch/powerpc/mm/book3s32/tlb.c | 4 +- >> arch/powerpc/mm/book3s64/hash_pgtable.c | 4 +- >> arch/powerpc/mm/book3s64/radix_pgtable.c | 19 ++++-- >> arch/powerpc/mm/book3s64/subpage_prot.c | 6 +- >> arch/powerpc/mm/hugetlbpage.c | 28 +++++---- >> arch/powerpc/mm/kasan/kasan_init_32.c | 8 +-- >> arch/powerpc/mm/mem.c | 4 +- >> arch/powerpc/mm/nohash/40x.c | 4 +- >> arch/powerpc/mm/nohash/book3e_pgtable.c | 15 +++-- >> arch/powerpc/mm/pgtable.c | 25 +++++++- >> arch/powerpc/mm/pgtable_32.c | 28 +++++---- >> arch/powerpc/mm/pgtable_64.c | 10 ++-- >> arch/powerpc/mm/ptdump/hashpagetable.c | 20 ++++++- >> arch/powerpc/mm/ptdump/ptdump.c | 22 ++++++- >> arch/powerpc/xmon/xmon.c | 17 +++++- >> 28 files changed, 284 insertions(+), 120 deletions(-)