From nobody Tue Sep 9 22:45:16 2025 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 5F7FAC04A94 for ; Wed, 26 Jul 2023 16:46:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231811AbjGZQqv (ORCPT ); Wed, 26 Jul 2023 12:46:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33320 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231656AbjGZQqi (ORCPT ); Wed, 26 Jul 2023 12:46:38 -0400 Received: from mail-pl1-x635.google.com (mail-pl1-x635.google.com [IPv6:2607:f8b0:4864:20::635]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0EE002707 for ; Wed, 26 Jul 2023 09:46:34 -0700 (PDT) Received: by mail-pl1-x635.google.com with SMTP id d9443c01a7336-1b8ad9eede0so55359835ad.1 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=VExBFvCcjcZFwrpB2cHpNl7w08zJEJ5nejHDnJLjkP5y69YZLWD7KJ0jJOvA8kYxA8 bNln9Va2ImZ/tQU7ET/8qmGU4HP/89PvidXrAc5TrUvr/7UwgOpY5g0tabDvhMH3b7Rd BMU8cETsVNfcpPZ5rX2l/Km7SMAPaJ/pRDI4rXHPuYW639MEdO3AYDGorX0NIqpk6ryO /hooHS1m+jcfuGgrEfc8XX9rHv+cDz7lgzDDNl9axpzaxGZ5IScrVdkvNNfFPf8Io3gV QMY8WffS64o+Cxnj64U7Q3J/IGGmweU4gtutQnbJ0Zp+SbVaNmd9luI+V6kg0JkHnLn6 veHQ== X-Gm-Message-State: ABy/qLaZF2hPSmJsjYkbuVzvkm3t9DPfy13NzXgg8t5Gv26vkcPBkisj 6fiqowg39+4TyWRrzv/KGgBNDA== 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 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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/pgta= ble.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=E2=80=9348 all equal to bit 47, or else a page-fault exception will = occur." + * Similarly for SV57, bits 63=E2=80=9357 must be equal to bit 56. */ #ifdef CONFIG_64BIT #define TASK_SIZE_64 (PGDIR_SIZE * PTRS_PER_PGD / 2) --=20 2.41.0