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Thu, 13 Jul 2023 17:14:59 -0700 (PDT) Received: from charlie.ba.rivosinc.com ([66.220.2.162]) by smtp.gmail.com with ESMTPSA id x25-20020aa793b9000000b00673e652985esm5938107pff.44.2023.07.13.17.14.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Jul 2023 17:14:59 -0700 (PDT) From: Charlie Jenkins To: linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.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 v5 3/4] RISC-V: mm: Update pgtable comment documentation Date: Thu, 13 Jul 2023 17:14:02 -0700 Message-ID: <20230714001430.75798-4-charlie@rivosinc.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230714001430.75798-1-charlie@rivosinc.com> References: <20230714001430.75798-1-charlie@rivosinc.com> MIME-Version: 1.0 X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 5097840005 X-Stat-Signature: n373x798jmtqjc4s4xoyiah3ds77gyhr X-Rspam-User: X-HE-Tag: 1689294019-304880 X-HE-Meta: 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 zcnCC514 NYnQwKbnhEFbdEQVjUG/y7Viezzk1eGaw/rh/k1BjmNGQgMjeLp/6sVMTSdaQ+HDMlfT8+nMoRY80Wzy31iuMU3Kcpdpg0EdL7Uy6i8kh/jC6rZigF691dlaVF7XtMbWwxchP9U5xapwmQWf/jlPbbmAu0/ayVMHOGVphHVHH/l6DhaIRBCiLzRlJEQLXQ9SCIxcOrFCjAs1HqT9JLZtGFt3Wihj/SGABvRu95srlOjX2ZTclM1Q4F7odJnHFiwNnL/hAwnW8C8gjt+ZqJFMx+NW00YCTZYnkwmro6cNHRGsQZ09wouNbelft8Z/cHcsUxC/MmZQQ3uGSqEKnU72FTn5oFVE8IoHRUEu02Pj8CRm7qmMKbGI4m2mH16ZpZocZQ4grXi/R7ZxJV8MUtjYf2W3uI+kf+EzToIjNTtsSqIm+BvWYgdsGoZkVO5AEhgo9Tj3sYQ9e0FcbFyA= X-Bogosity: Ham, tests=bogofilter, spamicity=0.001530, 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 e13f5872bfe9..28660bab754c 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -840,14 +840,16 @@ 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)