From patchwork Thu Sep 8 02:24:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guo Ren X-Patchwork-Id: 12969581 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 26447C6FA83 for ; Thu, 8 Sep 2022 02:25:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=F03DoqSsMGcxNVNqxYT3BttgTEjVKT1WRgD10F4SYBA=; b=vKz+2QB2Jrz9eW i+fZCcdriEHswdECb4liZpFQZNZ/3a3UWF6aIJxnMTWtsxO2uriHOSMBrRWPwK8THAnsAoAYsxP/4 G1gPhEB38Jpu50dzjlDaRbA3x9cqYBU2/sgeSKLyubKf+mCnef4dyZkIcAqcny5UksZtd0DGkBJ08 9sR/NlrIRdC3JXeqPbKEHmF46J5BLCLfH/HRqVN9lHZ7x1MpdJowdTHryXHBsWfWXIotnWjhRMbF3 5z9c/1J903RlRVI7p9x30j3M15WmdsdxYMooN+kz8VPdSwIXyaXt1iUVU+Gr1JkzuuQLMmTACtKLg 6WHDaDm9zL6ckjJTLy1g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oW7EP-00Ef8O-N2; Thu, 08 Sep 2022 02:25:29 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oW7EL-00Ef0T-As for linux-riscv@lists.infradead.org; Thu, 08 Sep 2022 02:25:27 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id F3300B81E73; Thu, 8 Sep 2022 02:25:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CC622C433C1; Thu, 8 Sep 2022 02:25:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1662603919; bh=PWwh/YXG9dx0dtWtHG3/yHBED6i5hSGCgtNE2Z2JIEw=; h=From:To:Cc:Subject:Date:From; b=IIACQOWpPN4boCxf86cEOuTjUAmlBp3ujxTTDa72QX6A6qpHmsr9l7Vrs2mZqcFiB 2bSH/iR5Uba+LM9ltYToBi1SNZSQrcgsjcDlOtDbOcL9/pveePKU0iKQxH6msIqVG0 55D+rm0/tOW01PHBX9dRVxNZCnemoDMYhEVlD3589yAPlM1kSV0IbKKtf8QTe2aguM 4o2ugbD6hcPcOKJ7GgkGG7T5N0tDY2WpmMB7qP2MEqoROoEMnMk/R8MM7xC9uSbs6j uHEnP3wdFEheXflnL+3E1J9JSfXI/lgwXKAQe4P7pQFTpGIN0tHkNlgLD0v2bRPYTU ZKAzi4usP643Q== From: guoren@kernel.org To: arnd@arndb.de, guoren@kernel.org, palmer@rivosinc.com, tglx@linutronix.de, peterz@infradead.org, luto@kernel.org, conor.dooley@microchip.com, heiko@sntech.de, jszhang@kernel.org, lazyparser@gmail.com, falcon@tinylab.org, chenhuacai@kernel.org, apatel@ventanamicro.com, atishp@atishpatra.org, palmer@dabbelt.com, paul.walmsley@sifive.com, bigeasy@linutronix.de Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Guo Ren Subject: [PATCH V4 0/9] riscv: Add GENERIC_ENTRY, irq stack support Date: Wed, 7 Sep 2022 22:24:58 -0400 Message-Id: <20220908022506.1275799-1-guoren@kernel.org> X-Mailer: git-send-email 2.36.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220907_192525_705430_042D386B X-CRM114-Status: GOOD ( 12.32 ) 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: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Guo Ren The patches convert riscv to use the generic entry infrastructure from kernel/entry/*. Add independent irq stacks (IRQ_STACKS) for percpu to prevent kernel stack overflows. Add the HAVE_SOFTIRQ_ON_OWN_STACK feature for the IRQ_STACKS config. You can try it directly with [1]. [1] https://github.com/guoren83/linux/tree/generic_entry_v4 V4: - Fixup entry.S with "la" bug (by Conor.Dooley) - Fixup missing noinstr bug (by Peter Ziji) V3: https://lore.kernel.org/linux-riscv/20220906035423.634617-1-guoren@kernel.org/ - Fixup CONFIG_COMPAT=n compile error - Add THREAD_SIZE_ORDER config - Optimize elf_kexec.c warning fixup - Add static to irq_stack_ptr definition V2: https://lore.kernel.org/linux-riscv/20220904072637.8619-1-guoren@kernel.org/ - Fixup compile error by include "riscv: ptrace: Remove duplicate operation" - Fixup compile warning Reported-by: kernel test robot - Add test repo link in cover letter V1: https://lore.kernel.org/linux-riscv/20220903163808.1954131-1-guoren@kernel.org/ Guo Ren (8): riscv: elf_kexec: Fixup compile warning riscv: compat_syscall_table: Fixup compile warning riscv: ptrace: Remove duplicate operation riscv: traps: Add noinstr to prevent instrumentation inserted riscv: convert to generic entry riscv: Support HAVE_IRQ_EXIT_ON_IRQ_STACK riscv: Support HAVE_SOFTIRQ_ON_OWN_STACK riscv: Add config of thread stack size arch/riscv/Kconfig | 19 ++ arch/riscv/include/asm/csr.h | 1 - arch/riscv/include/asm/entry-common.h | 8 + arch/riscv/include/asm/irq.h | 3 + arch/riscv/include/asm/ptrace.h | 10 +- arch/riscv/include/asm/stacktrace.h | 5 + arch/riscv/include/asm/syscall.h | 6 + arch/riscv/include/asm/thread_info.h | 19 +- arch/riscv/include/asm/vmap_stack.h | 28 +++ arch/riscv/kernel/Makefile | 1 + arch/riscv/kernel/elf_kexec.c | 2 +- arch/riscv/kernel/entry.S | 255 +++++--------------------- arch/riscv/kernel/irq.c | 75 ++++++++ arch/riscv/kernel/ptrace.c | 41 ----- arch/riscv/kernel/signal.c | 21 +-- arch/riscv/kernel/sys_riscv.c | 27 +++ arch/riscv/kernel/traps.c | 19 +- arch/riscv/mm/fault.c | 12 +- 18 files changed, 263 insertions(+), 289 deletions(-) create mode 100644 arch/riscv/include/asm/entry-common.h create mode 100644 arch/riscv/include/asm/vmap_stack.h