From patchwork Sun Sep 4 07:26:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guo Ren X-Patchwork-Id: 12965132 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 DB3C0C6FA82 for ; Sun, 4 Sep 2022 07:27:47 +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=VGdaaxtXfWyIOv8/waDabyJH8egrB9ny2iE+HlafMBo=; b=ajval6pJNypPZu lrt2G8I8oo+2qVWrxRJ8FzzkN30i96AA5NkNIzpXX9e8d2oqIpMHD3urkO06cEoyuKekTkmsO+9e5 hFhC05YDEOqtih795Osi1mRKtuvvip9w1zGhJamHJHH+KHpaE4tmJf8PMs3FctJ6vKPApHdm3wE0y h283YjYUt7TW6fROaQFp2EbSYaIyUVsEeZJKxUOMout7hek0g4DP4BTcYxfFagVwjDFyKhdMcBlsE mcaghRbYbYeOZkbSzg83vZ1HSJX5RV9rMgbJJ9ENdgJryZTSCX3b5uCR9J6PzVmJeSXAoUci7AZWb hfBLPmmB+zwc9nJfQ8OQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oUk2L-00HOKj-FL; Sun, 04 Sep 2022 07:27:21 +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 1oUk2J-00HOK2-8Z for linux-riscv@lists.infradead.org; Sun, 04 Sep 2022 07:27:20 +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 099FFB80D2D; Sun, 4 Sep 2022 07:27:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2E68DC433D6; Sun, 4 Sep 2022 07:27:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1662276432; bh=Ch23AYNtyFVoUZ3rSTNSj6dwqtU+Er2LgcLRrNLkFPA=; h=From:To:Cc:Subject:Date:From; b=qrbRku5mHXR59ThJPg6vRzifYd9nBFm/gjPCPVslkuW7mcC5E4SEuhAE06FS2A20y 8Rbaq9hblTYfQmzCHKTem8c/cHZu+SiMs8/Ir7+WG0cBMu/kvNOJIdqYFKjMp+/u+m UyzOB5YfSdP46zf5ww/esW8HKA3qeaOvihlQss+z3Kzh8nMfyPBfHjoCTLFOShWFMQ CTAcGBPiB65y89jEaIZINeWbchR/s893whkQCRj/iMkvc+DIDMFCZW2I/eexkYQWJ+ u2wMltVUGh+niStNVvgWxPK+1rVSBvIf1Y7R4szS0XXfvIZfKEWw7Pzs2xiCOE+C00 VsqaBxarLwb7A== 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 Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Guo Ren Subject: [PATCH V2 0/6] riscv: Add GENERIC_ENTRY, IRQ_STACKS support Date: Sun, 4 Sep 2022 03:26:31 -0400 Message-Id: <20220904072637.8619-1-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-20220904_002719_454697_F2A3F81B X-CRM114-Status: GOOD ( 12.01 ) 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_v2 Changes in V2: - Fixup compile error by include "riscv: ptrace: Remove duplicate operation" https://lore.kernel.org/linux-riscv/20220903162328.1952477-2-guoren@kernel.org/T/#u - Fixup compile warning Reported-by: kernel test robot - Add test repo link in cover letter Guo Ren (6): riscv: ptrace: Remove duplicate operation riscv: convert to generic entry riscv: Support HAVE_IRQ_EXIT_ON_IRQ_STACK riscv: Support HAVE_SOFTIRQ_ON_OWN_STACK riscv: elf_kexec: Fixup compile warning riscv: compat_syscall_table: Fixup compile warning arch/riscv/Kconfig | 10 + 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 | 15 +- arch/riscv/include/asm/vmap_stack.h | 28 +++ arch/riscv/kernel/Makefile | 1 + arch/riscv/kernel/elf_kexec.c | 4 + 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 | 26 +++ arch/riscv/kernel/traps.c | 11 ++ arch/riscv/mm/fault.c | 12 +- 18 files changed, 250 insertions(+), 282 deletions(-) create mode 100644 arch/riscv/include/asm/entry-common.h create mode 100644 arch/riscv/include/asm/vmap_stack.h