From patchwork Sat Jul 8 01:11:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Charlie Jenkins X-Patchwork-Id: 13305509 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4083C001DC for ; Sat, 8 Jul 2023 01:12:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232277AbjGHBMW (ORCPT ); Fri, 7 Jul 2023 21:12:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59452 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232449AbjGHBMU (ORCPT ); Fri, 7 Jul 2023 21:12:20 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 98C5B210B for ; Fri, 7 Jul 2023 18:12:19 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id d9443c01a7336-1b8ad8383faso17038105ad.0 for ; Fri, 07 Jul 2023 18:12:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20221208.gappssmtp.com; s=20221208; t=1688778739; x=1691370739; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=VGYD7N8wGDu1tDg8VZbK81LUzFuUntAfMahEoaG4sqc=; b=HGN3ju79/NcRtAH1rWTzt1SF66qlIOEIPW+h8YCZSLaemLUac5sLeNcc06JOpcpXYS Cj+44tx2Z+rwnRiNelURAceDB/qdaKXjyGvhTuZuZecJIPAZ93DUuWf9RMS8856fmHx8 Umn9pcJZq+zDFbW3kfivmOjwAuguRCJGOID7fJdAs9Nbn12i9eOGzLQ76DGuAdP1h2/F EC/pD0QZPhElZ7NCVIs4iLArjS3xtiJrVYm/2wZeUdSifvbekOHDtDtmS8cMIhwN9VIH 81Hbh7TQSzo/OJgjK4nyg7wVpciIrnm85nU2hbGdj1OHDOVQwJk4nRSRz6OyiZoPcTy9 ci6Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1688778739; x=1691370739; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=VGYD7N8wGDu1tDg8VZbK81LUzFuUntAfMahEoaG4sqc=; b=jvimAF71u1VMw109MaSxk540xAEXihL4HcLRcmosOS8uzdifGMHuXZnEHF/TEiNEfS VVjDNuhH/9HVyzsbE7H5k486vIMin8ejXO0hZt1l+C5ffE/kTIG4zQzeSaRvJgJmgZeo 8JvGRf+C1bAVM23yo89KNJ06eO5M6nYp/GDAF/Wb5/2er0bkpl91Y4i5dCUNX5CAO9WC jnKa+r++TBy91LUWJzMvPFHjbyj0994UMkxSvj643B5nV0sTU5bSNfrVyY/qyJJZIqai BoxB94rT7Fht8FBMzovVna29jMwGyOADlprc9XFmNPE8fhL5NIjvqMp64hqO7H34Gu75 rccg== X-Gm-Message-State: ABy/qLYE+OfBiFSFLPYjSx5s/hXh1h9/ZWmVKnLDZoKH4eJBO1vfrEzA 4V+QlpZgIV6/o9ZCHJPzPwIyaQ== X-Google-Smtp-Source: APBJJlHkZ1VNL0aalCS0nI4K5MUssbBtfN29EiaKPdj3R58vKoRX7bIN9ly2ZZTe32HyTdXxVRe5ag== X-Received: by 2002:a17:902:c951:b0:1b8:3e15:46a1 with SMTP id i17-20020a170902c95100b001b83e1546a1mr8516813pla.67.1688778738940; Fri, 07 Jul 2023 18:12:18 -0700 (PDT) Received: from charlie.ba.rivosinc.com ([66.220.2.162]) by smtp.gmail.com with ESMTPSA id x24-20020a170902b41800b001b87d3e845bsm3830654plr.149.2023.07.07.18.12.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 Jul 2023 18:12:18 -0700 (PDT) From: Charlie Jenkins To: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: charlie@rivosinc.com, conor@kernel.org, paul.walmsley@sifive.com, palmer@rivosinc.com, aou@eecs.berkeley.edu, anup@brainfault.org, konstantin@linuxfoundation.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, mick@ics.forth.gr, jrtc27@jrtc27.com, rdunlap@infradead.org Subject: [PATCH v4 3/4] RISC-V: mm: Update pgtable comment documentation Date: Fri, 7 Jul 2023 18:11:34 -0700 Message-ID: <20230708011156.2697409-4-charlie@rivosinc.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230708011156.2697409-1-charlie@rivosinc.com> References: <20230708011156.2697409-1-charlie@rivosinc.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org sv57 is supported in the kernel so pgtable.h should reflect that. Signed-off-by: Charlie Jenkins --- arch/riscv/include/asm/pgtable.h | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index a8090ebea705..e6bbe8c0e583 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -841,14 +841,16 @@ static inline pte_t pte_swp_clear_exclusive(pte_t pte) * Task size is 0x4000000000 for RV64 or 0x9fc00000 for RV32. * Note that PGDIR_SIZE must evenly divide TASK_SIZE. * Task size is: - * - 0x9fc00000 (~2.5GB) for RV32. - * - 0x4000000000 ( 256GB) for RV64 using SV39 mmu - * - 0x800000000000 ( 128TB) for RV64 using SV48 mmu + * - 0x9fc00000 (~2.5GB) for RV32. + * - 0x4000000000 ( 256GB) for RV64 using SV39 mmu + * - 0x800000000000 ( 128TB) for RV64 using SV48 mmu + * - 0x100000000000000 ( 64PB) for RV64 using SV57 mmu * * Note that PGDIR_SIZE must evenly divide TASK_SIZE since "RISC-V * Instruction Set Manual Volume II: Privileged Architecture" states that * "load and store effective addresses, which are 64bits, must have bits * 63–48 all equal to bit 47, or else a page-fault exception will occur." + * Similarly for SV57, bits 63–57 must be equal to bit 56. */ #ifdef CONFIG_64BIT #define TASK_SIZE_64 (PGDIR_SIZE * PTRS_PER_PGD / 2)