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Sat, 9 Sep 2023 16:17:27 -0400 (EDT) From: Samuel Holland To: Palmer Dabbelt , Alexandre Ghiti , linux-riscv@lists.infradead.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Samuel Holland Subject: [PATCH 0/7] riscv: ASID-related and UP-related TLB flush enhancements Date: Sat, 9 Sep 2023 15:16:28 -0500 Message-ID: <20230909201727.10909-1-samuel@sholland.org> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 0594520016 X-Stat-Signature: mznux5q6nks17761t4mxbu7xbkz44qs1 X-Rspam-User: X-HE-Tag: 1694290650-29230 X-HE-Meta: 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 EyUKsVfF TSlVQgn/vKEMnBZzAOVwI9O4edICCxJGAibTxsNs22vyf4fhFvtLj7EoCg4uUytjd8rihnlU/b4Su7rJ49XloVKwQr+apQqky8qDYUYGMRaZIA26zMIJDBYvnOaED11Vq1ovxVLYxvbN1giNGpUIiOxs8XT49/Nidv+wYYOaQj1rWfMucgOFtGPwf1WW/rcW1VQLqKQwEJ13qVACJfQZlLX4LpBaI+GffoQRW353SbtlqFgodggmTNtbozgPaN+AbVJc6z0/HRpg1rse/JQPuuAjL7VEooj9kJEuVyUiUyUdybIUKEijmZ4QOsziRyBrPuTWLi3nddmHloQBSSjkLVFAPIyIZlDUNAg9cpWPHB7wltk2udwK2D5uB2dzLpLsumBna X-Bogosity: Ham, tests=bogofilter, spamicity=0.000005, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: While reviewing Alexandre Ghiti's "riscv: tlb flush improvements" series[1], I noticed that the TLB flushing functions mostly end up as flush_tlb_all() when SMP is disabled. This series resolves that. Along the way, I realized that we should be using single-ASID flushes wherever possible, so I implemented that as well. This series is mostly orthogonal to Alexandre's series, though it does remove the non-ASID code path from tlbflush.c, which turns out to be required for flush_tlb_kernel_range(). [1]: https://lore.kernel.org/linux-riscv/20230801085402.1168351-1-alexghiti@rivosinc.com/ Samuel Holland (7): riscv: Apply SiFive CIP-1200 workaround to single-ASID sfence.vma riscv: mm: Introduce cntx2asid/cntx2version helper macros riscv: mm: Use a fixed layout for the MM context ID riscv: mm: Make asid_bits a local variable riscv: mm: Preserve global TLB entries when switching contexts riscv: mm: Always flush a single MM context by ASID riscv: mm: Combine the SMP and non-SMP TLB flushing code arch/riscv/include/asm/errata_list.h | 12 +++- arch/riscv/include/asm/mmu.h | 3 + arch/riscv/include/asm/mmu_context.h | 2 - arch/riscv/include/asm/tlbflush.h | 41 ++++++------- arch/riscv/mm/Makefile | 5 +- arch/riscv/mm/context.c | 26 ++++---- arch/riscv/mm/tlbflush.c | 92 +++++++--------------------- 7 files changed, 67 insertions(+), 114 deletions(-) -- 2.41.0