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[2620:137:e000::1:20]) by mx.google.com with ESMTP id h185-20020a6383c2000000b0055ace8caef7si1728321pge.610.2023.07.27.14.52.07; Thu, 27 Jul 2023 14:52:20 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@rivosinc-com.20221208.gappssmtp.com header.s=20221208 header.b=HH7TEI0F; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231959AbjG0V1P (ORCPT + 99 others); Thu, 27 Jul 2023 17:27:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51054 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231938AbjG0V05 (ORCPT ); Thu, 27 Jul 2023 17:26:57 -0400 Received: from mail-pf1-x42f.google.com (mail-pf1-x42f.google.com [IPv6:2607:f8b0:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BA5E91BE8 for ; Thu, 27 Jul 2023 14:26:55 -0700 (PDT) Received: by mail-pf1-x42f.google.com with SMTP id d2e1a72fcca58-686ed1d2594so1397791b3a.2 for ; Thu, 27 Jul 2023 14:26:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20221208.gappssmtp.com; s=20221208; t=1690493215; x=1691098015; 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=nxIryN+/nGnN7q5/mJrC1dQ+rinWckKL0IS2jYwlkeI=; b=HH7TEI0FKqELKzYIXsjAzNMOv7EmEk19k49xsmg5JJ2iJpQjJBUsJBektepS7kbqjA Vt/YOabaV+5seRyrTS+nQFfXRu/Rmc0qF/Cmuzi6vbvzfQQ7hYiZSyJOGxFRzI1tA3px fkP0ufFuAla153rOmkqGNp0bHyeGAvpUM3evTA9mfbdGVkW+96ufuS/f54M74SC3GCRo WqzWIVc8ARWe8/mWjw/9xYezMnJhgSJlmpSTw5U4/6ICvlMwjc3VVGpkITduwPQnE0vT zFsh4Tq4pcASeCN6YVhHilpdFEEvWGuxwZ4SH0AQAfZfQIb9FQNxijHErK3RcGa3TLoV 6PHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690493215; x=1691098015; 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=nxIryN+/nGnN7q5/mJrC1dQ+rinWckKL0IS2jYwlkeI=; b=Pg4Vhji2Yjf/d/bbcdiu8IrxSQxqpiEGCLmiq8SSxfIp0eNXw4hMecPHTXtixJF0Qn TUZ/XzA7JZNAipLrOMK+WjsJht9ZXx0rlKUNojwNZa0F+3g86qQu8xx+jjVXPkj7r8Yw Oog+LWogT4HS7c0fyh8yx7tTlAPI6pBRlqiWH7XMnPI3FmfHusbmCsD3jOJWjsAtiBSo p/b6ZCPLFhXfND7QwX9x2OscfHLeCSn4ZJJ9NEeabwmb0p151Pv7rCM7Qjpcn0L7D6oV Up+aLapYZgOoQQqRt+28dpTskqqKihCC9g3GWM9IXXmD3UN//hmE13ipYMpGe6duToYn qLJQ== X-Gm-Message-State: ABy/qLboRuF++L422TkwkcuGOL/MquXPh6IVMy7h+UbqBpwhcCm+5Uye fuEIe5tPiicS/aN7y0YsgN1CUQ== X-Received: by 2002:a05:6a00:2316:b0:668:82fe:16f1 with SMTP id h22-20020a056a00231600b0066882fe16f1mr369674pfh.1.1690493215262; Thu, 27 Jul 2023 14:26:55 -0700 (PDT) Received: from charlie.ba.rivosinc.com ([66.220.2.162]) by smtp.gmail.com with ESMTPSA id c5-20020aa78c05000000b00682562b1549sm1912312pfd.24.2023.07.27.14.26.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 14:26:54 -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 v8 3/4] RISC-V: mm: Update pgtable comment documentation Date: Thu, 27 Jul 2023 14:26:28 -0700 Message-ID: <20230727212647.4182407-4-charlie@rivosinc.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230727212647.4182407-1-charlie@rivosinc.com> References: <20230727212647.4182407-1-charlie@rivosinc.com> MIME-Version: 1.0 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1772612213190245027 X-GMAIL-MSGID: 1772612213190245027 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 c76a1ef094a4..b551467a1dd8 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -848,14 +848,16 @@ 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)