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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 X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 45B3340004 X-Stat-Signature: fafkxi9upuk6uwxq8c545rywf5twjpsr X-Rspam-User: X-HE-Tag: 1688778740-189808 X-HE-Meta: U2FsdGVkX1+v0yn7cWTbGp4lXq8jT+llmAvMhhop14+aJ8vqHdxjKHYA3lNRR/1O6ZAOAwapdjBPYkuvf/WIJRemNa5DSgo3L1LYhroqfejUNkSZ0eanaG9BSYvA7//Zqi7pKUyU+BztzqejOP+tgjf6Gxg1nJWI7AyNGwL9ykSWRO4yu6lgsBBMQ7LH+W3sNNDnXRq/pyZiuYsZxXwKmb6xKu1rVdugO2w87ge9VLhB10+erbl8rDQTp+qc9VEveVJOnvu99lDW28/0LINZGP5FxrW+AdPTwiLpEnVYuKVPGLdGpoV3vPBzmiZ6biD4gnygjU3DHP6BU2eVqdYgiDwYdw5ze4E7ChWP5mrFlEF/baNsBBpyqEBXZmq/bXerZcZqlAv40b35/pJL7wxiO0iY4+MIDrCvmYdcLLDiLO5tyCYFOJHsSZ0c8cU/4+7r5IcbW7CGJ7XGAKHXWd8JpG4o0wC0ZN2j6tD5TsLu36p7EZonllXY6XoJq5WBthLdG5GijlrP8+HUt/fOq5ioGOG+DkqNIYTPmnVCupOmrWlTpRgagzFrYt5n27vSF1ULnntF3StTNztBrrbwBqi9aQM567WKDVru1OEfDNUTiE3ps2d4MYLsjVNj81YJwovV4uefnUYU79cmbiz2FQ6hjPwEL8QNLH7zBKpiLJuH0GiERc6gPikGyFRu624GTBW1L5wFVxjQMMlkIn4Cg4PiyuCwjNVhRpJ7zk8ENlmwGv7gRQiWzFFqSZ9PUwZgyrWBwxh40tyHepeimjY/bCsROxEdHJbSA2K//aEfYM4lxkMYkVz/yw0W7G4aPndawd0HX5Hj2Uw4JK6/Vo9feGfCx3qKpxZTXMp7sojydDgz8mgqcoYh9SylyH7WbKEbCVf+CWb39ibhiJ5i9cHBRLi9c70rqiNTjgEvXvlHLEEMVwDdxMSIHYkQygXO6l7oBq8T6MMvfs6nziXuI1MGhU3 EkAnzvzM f/Kv22MH7qHDk8/B+aun7jf0fORu6iaie/+xPFhNi8fVgCnCI38L/zbxijlnctAX/ac0YyhIPbzz/w2wIYi4IVK9f4jYGCkS2umfuu60lID0fd3YhDiWGohLF6gLPzqCdyozLFqOqiHFkGmXf7rS6iVDMbypyr/neEzNFDn5K5/sh2Kj+XRi/jGnnYDQL0s0p9Gc8/7wvsdjV0VHZ9u+PniU6juA6YahzJXj9kCVCWiF5AcMNPD8QxP17CL1FuXtbsbn5Cg3uOXi1RDbvCgHwSL2Xl77DFK7dpq9+cRRKGs5AsLZz3f/LkY8jKMM5CZ7dNU+O+GbroXLpyMoZnpYH2orkmKbWn4b9Z0XSdfykyLCyxrkcTAot+G7bI8npQtIqtqNyRZcq/uTH97HZCzCHKsxdlCy1eaMLvOSi6EY+i9izpxY+PkePUzMj4x1bHPUBXRH01LeOHb2MPPU= X-Bogosity: Ham, tests=bogofilter, spamicity=0.092547, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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)