From patchwork Wed Aug 9 01:51:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Charlie Jenkins X-Patchwork-Id: 13347306 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 8F79FC001DE for ; Wed, 9 Aug 2023 01:53:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231334AbjHIBxQ (ORCPT ); Tue, 8 Aug 2023 21:53:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40436 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231235AbjHIBxM (ORCPT ); Tue, 8 Aug 2023 21:53:12 -0400 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 71A6D1BD3 for ; Tue, 8 Aug 2023 18:53:11 -0700 (PDT) Received: by mail-pl1-x630.google.com with SMTP id d9443c01a7336-1b8b2b60731so39944655ad.2 for ; Tue, 08 Aug 2023 18:53:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20221208.gappssmtp.com; s=20221208; t=1691545991; x=1692150791; 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=5q2lf0ErqSwJrn3JbgeuhvaoxCnqdWFIkpf1V4h3asg=; b=KQfNpvZbwPfJw4InJH3Gop3jL8C3JwJPDbX7mWsYj121ubZsb8RGRA2aI9F/PwCRVF VythodBAkVElVzcYFFbi1lDli1YK6i88YBAyJ4izWsKPC7TciTmEvVoHSJFMyct3/A1C QCjr27vWn57/CGMNexhGRhDrj7RKrU+Fm1uLuqZAWixGoxJgCb59LKtThbuUpPvCKADL SV/MKjcJ/vt528cSHhB3ZDKQVmxe2Pl4qLNnNm+Usxd5J+XvPi8hxQoSr+RdZwvLVwxq XkZe4sqD/xdLk4MoYZctFEDxxFdlv5Rih9i/apAmP5jgpZqpVJTVwvCWYM3sPWvQD09+ Qnvw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691545991; x=1692150791; 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=5q2lf0ErqSwJrn3JbgeuhvaoxCnqdWFIkpf1V4h3asg=; b=M/PPFGMvPag+Vj0poWZGH96+rmPNKdMuRTL2scRwBBenoBT/iaeLR02b6VRmQddJCo GEiKglevoR1G9O9YSSeQhJ6Z6dGEu6s025n7OW4Vpgdt1m9K8YuMdM0eaWLEsg5Mmx10 t79Mv1k/rUcWzzwn50vlHO1VytxIcjyrEHie9UNjhCaAO9fDMvXJaaQTaXK8hq7jV003 ScCB1p6MvZ8g4B+W0pQ+twLdkO8GQYPAGZzvw/qTdXRiEt8AMBTjjaBpgSG/VMPRSQ2f i7jXRq/IorgSI/5ubuXHFQ2WLWYC/lSE9CB4jLYQyzvOzkSJ0ral1PmAa8P12aQ3fEb+ PxBw== X-Gm-Message-State: AOJu0YweKiHAcL6WgrPy/5a21t7PLMn3Eavq4GIpU0tyAi8BuVXrsrJa 7dZGv8knzwGz4qjK2D+8U+Q12g== X-Google-Smtp-Source: AGHT+IGg+v5KFzlU+jQrk/Y4IPjZqAfK6IzCZuHeB5tm9d5fjhnx1QdE7SY5R0FlUS9hkHWQ+fZbQA== X-Received: by 2002:a17:902:d2cf:b0:1bc:3f9b:d96 with SMTP id n15-20020a170902d2cf00b001bc3f9b0d96mr1444563plc.49.1691545990966; Tue, 08 Aug 2023 18:53:10 -0700 (PDT) Received: from charlie.ba.rivosinc.com ([66.220.2.162]) by smtp.gmail.com with ESMTPSA id bj7-20020a170902850700b001b87bedcc6fsm9657591plb.93.2023.08.08.18.53.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Aug 2023 18:53:10 -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, alexghiti@rivosinc.com Subject: [PATCH v9 3/4] RISC-V: mm: Update pgtable comment documentation Date: Tue, 8 Aug 2023 18:51:09 -0700 Message-Id: <20230809015110.3290774-4-charlie@rivosinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230809015110.3290774-1-charlie@rivosinc.com> References: <20230809015110.3290774-1-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 Reviewed-by: Alexandre Ghiti --- 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 2611c1324a7c..76907b95109a 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -849,14 +849,16 @@ 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)