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Wed, 09 Aug 2023 16:24:25 -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 v10 3/4] RISC-V: mm: Update pgtable comment documentation Date: Wed, 9 Aug 2023 16:22:03 -0700 Message-ID: <20230809232218.849726-4-charlie@rivosinc.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230809232218.849726-1-charlie@rivosinc.com> References: <20230809232218.849726-1-charlie@rivosinc.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: js9azpy8czroosz7hy6otcut8rrzrsit X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: CCEF6A000D X-HE-Tag: 1691623466-618976 X-HE-Meta: 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 AZkMkpS/ iBRtvmpseVAk1oDApQ4maef5QV7uzss4/1hI62PZZYZoFODnQ6X7masHjQOQeiwymsdFVaWuXKmo9+htJkphSUIl95ScgaJW7YSSdu6GANmzFjBCj9lyN9OUM8FU/Yc2+dxJveSh/REff73f9Ry5Gl079abhx0tmDtqiqqb7v1DCkTw2tJMychFdMP9WOuD97+2V33yE/YL/PIWmfvTnXSMW2RCmTpcQDe2OiigUVoMsdiWHbe68lI582JGyHdOmKmKeHB09pBHoygUqUvkR4jz3Pkc/Ur77jdCDpBdIOY1+ZRUncYA+rZWE/gkiRYkuvcAjog+nLoDPomJLe1TiRZcvPLJv3LP3/ON/FcMMUMSS8H1NVVQmjhHQGj9L89ibtbW+D194JxLT2GOs1+y/CmaarjEMF8v17j4o8mKq1L1SEh+cvnP91Xmd7z0HYj1WVDbTToPgj33RtWpg= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000223, 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 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 bb0b9ac7b581..2c5f6c8edc8a 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -851,14 +851,16 @@ 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) -- 2.34.1