From patchwork Wed Jul 26 16:45:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Charlie Jenkins X-Patchwork-Id: 13328368 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 BCB62C04A6A for ; Wed, 26 Jul 2023 16:46:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231858AbjGZQqw (ORCPT ); Wed, 26 Jul 2023 12:46:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33330 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231664AbjGZQqj (ORCPT ); Wed, 26 Jul 2023 12:46:39 -0400 Received: from mail-pl1-x634.google.com (mail-pl1-x634.google.com [IPv6:2607:f8b0:4864:20::634]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07B7D26AE for ; Wed, 26 Jul 2023 09:46:34 -0700 (PDT) Received: by mail-pl1-x634.google.com with SMTP id d9443c01a7336-1bbc64f9a91so12657645ad.0 for ; Wed, 26 Jul 2023 09:46:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20221208.gappssmtp.com; s=20221208; t=1690389993; x=1690994793; 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=nxXmOdIWe/bZgFmovuliVgy5AL4XQqsEakBY4VilH/8=; b=uGj1t6oL4u1fl4y0bUjyIo+gEG6FvyX76N3UvGsKUanjjrHB6wnIUkhEejMij86pkP EVcq1qYhmhAsWKH/bTv86zK02/LQZMQq7g4GucihnDv97RSd4YvXnrbgbDWPGh57Gm43 otyrPfQG7tSPmnn1LK0ZKv6nS+RjBkhyBwtgizouPL3Kq5x8fU1JxqHm8ESNdJya0Equ u60fTChXgviIE+TR2UEeszDN/H3aPv73hS0hvyNcKuH0qJi9wFqWw0PjC0ks4SU85S2Z 5glfdqvmMevya7khD8CyeEfxUGRd305Yi1lCbXYzBjv2vJ/zFMEBiJB9hvll+QMy0/cX T8VA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690389993; x=1690994793; 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=nxXmOdIWe/bZgFmovuliVgy5AL4XQqsEakBY4VilH/8=; b=D6l9QGFdWsFpoRMJEwbZvZy5RE6SernxBDE4G1FVJXTKJ3AiYQTaUDbNCXo7x1lqj9 7HLTfyRyFt25DG75YIEwBMPuy8etVnXc7JR7UFl2t29Gr6Qjj2LB+ichrvpPX6dCPfKl 0jLVrA699+nsEWRnXm8lTuIxYWYPTPyHXxekgaGaXrcIz4SmDp7F/kFaOFRCCVfGtjXJ xUGpP1TVeqU/P4Jt1ZWcTT3jPqetTlZlwa1ylD6TLqyWsllCOqTiinpVKqaGeaoJ0EaH dRswp0zUKuWsyqGXIqaxS6pcOAHP1muYhAWENI3zg3l8IilsFBOeWQqhP1ZojU+HOZgb opzg== X-Gm-Message-State: ABy/qLbQ2bdQPNpmfdG8oEf+NvROasVwbjGqngaOoB+RyUWdvN8mXsrK SoAnaPcok1WCYJkloFNYPCphuw== X-Google-Smtp-Source: APBJJlHd8ZanXubRsLvs8LnpqdeDXtlGfjvqC1HSJQRHauQPQgT6PVzi7mdT5yfnVwFo9B2eoHwlEA== X-Received: by 2002:a17:902:c205:b0:1b5:219a:cbbd with SMTP id 5-20020a170902c20500b001b5219acbbdmr2429756pll.3.1690389993609; Wed, 26 Jul 2023 09:46:33 -0700 (PDT) Received: from charlie.ba.rivosinc.com ([66.220.2.162]) by smtp.gmail.com with ESMTPSA id h5-20020a170902f54500b001bb6c5ff4edsm11628870plf.173.2023.07.26.09.46.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Jul 2023 09:46:33 -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 v7 3/4] RISC-V: mm: Update pgtable comment documentation Date: Wed, 26 Jul 2023 09:45:57 -0700 Message-ID: <20230726164620.717288-4-charlie@rivosinc.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230726164620.717288-1-charlie@rivosinc.com> References: <20230726164620.717288-1-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 530f6a171a2b..cd09ccd876b9 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)