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Thu, 30 Oct 2025 06:57:11 -0700 (PDT) Received: from J9GPGXL7NT.bytedance.net ([61.213.176.55]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29498e495e8sm187071905ad.110.2025.10.30.06.57.07 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Thu, 30 Oct 2025 06:57:10 -0700 (PDT) From: Xu Lu To: pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, apatel@ventanamicro.com, guoren@kernel.org Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Xu Lu Subject: [RFC PATCH v1 2/4] riscv: mm: Introduce percpu tlb flush queue Date: Thu, 30 Oct 2025 21:56:50 +0800 Message-ID: <20251030135652.63837-3-luxu.kernel@bytedance.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20251030135652.63837-1-luxu.kernel@bytedance.com> References: <20251030135652.63837-1-luxu.kernel@bytedance.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251030_065712_473750_1FCA9F34 X-CRM114-Status: UNSURE ( 8.49 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org The percpu tlb flush queue is used to buffer the tlb flush tasks that each cpu needs to process. Signed-off-by: Xu Lu --- arch/riscv/mm/tlbflush.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/riscv/mm/tlbflush.c b/arch/riscv/mm/tlbflush.c index 8404530ec00f9..aa8f1304ae5c4 100644 --- a/arch/riscv/mm/tlbflush.c +++ b/arch/riscv/mm/tlbflush.c @@ -103,6 +103,18 @@ struct flush_tlb_range_data { unsigned long stride; }; +#define TLB_FLUSH_QUEUE_SIZE 16 +struct tlb_flush_queue { + struct flush_tlb_range_data tasks[TLB_FLUSH_QUEUE_SIZE]; + raw_spinlock_t lock; + unsigned int len; +}; + +DEFINE_PER_CPU(struct tlb_flush_queue, tlb_flush_queue) = { + .lock = __RAW_SPIN_LOCK_UNLOCKED(tlb_flush_queue.lock), + .len = 0, +}; + static void __ipi_flush_tlb_range_asid(void *info) { struct flush_tlb_range_data *d = info; -- 2.20.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv