From patchwork Sat Oct 15 11:47:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guo Ren X-Patchwork-Id: 13007649 X-Patchwork-Delegate: palmer@dabbelt.com 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 5DC7DC433FE for ; Sat, 15 Oct 2022 11:51:32 +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:References:In-Reply-To: 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: List-Owner; bh=zy89mH4FQ4K7WQbx0WhgLt+UujtpYFjr1mbvIqXMrDM=; b=1a2+9QfRTH5aF+ d7mTLPYn6TS02kKzEAmYO/GlFSd/BDtLJ8BFJHdPq3ldSZm9Euo73dP2Iptt5VM4cTouqkl58YaF3 i/tKFpCBYnmab/MEx1EN8x559VQDd2g4m+kFmhsIKbkLAZUPsamXY5GqQq11ICskeQ2XcjHhFZ+5a +UjnRTp3l13fsDJ92HZmuR2X1S96KjEgMSbAhqTgdu5Jgl33sn9j01AWtmgRlFxBztkjdejTfJCBN TXChe3wDQuXIdML6jB1T7/RGDYqXqhAJlDc9ITKWYf8aDCLnjIb/AiK6Blh5iazTZx1j+ZVdCxeWb SLQ6LTJn63C2XP3PINmQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ojfhK-00Gqrb-0S; Sat, 15 Oct 2022 11:51:22 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ojfhH-00Gqp4-7e for linux-riscv@lists.infradead.org; Sat, 15 Oct 2022 11:51:20 +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 dfw.source.kernel.org (Postfix) with ESMTPS id CE48C60920; Sat, 15 Oct 2022 11:51:18 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50F6BC433D6; Sat, 15 Oct 2022 11:51:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1665834678; bh=TxUjoHq4rCqfK0kNHzvh6xhZsPO6l0oQ3VoILpocI+w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ivRt3FF2vJOnX815vISDKIYI9RuzvRdtpwgrhm6QsjX0vuCqvs0w99kPZzfLraTA+ 6GHrYAqo+JcINqQUHzKwAEEKZ9xO+mgmhbaFEB/lgfGHqbVxGcFNAkCoz7pWtfxzxw 7tPg/4XW/YXny2Uxz02xG+vICFKIYPqzzT8XCvEpdnVNOsLErDWQVHSQNtWzCsajQE heAfZehJLOJIxY8409E9iC7dmjW6tJ+Azayz++fZACnKjWGqnu4lKmgOuXG2IP3ad8 zTLQk6HnU6qC0ekEHDK60opsftgwkRhl8rbygJR+XLu7UpDPfrhWFqBAIrfqGvV6Go O2mr8oIPCdORQ== 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, mark.rutland@arm.com, zouyipeng@huawei.com, bigeasy@linutronix.de, David.Laight@aculab.com, chenzhongjin@huawei.com, greentime.hu@sifive.com, andy.chiu@sifive.com Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Guo Ren , Andreas Schwab Subject: [PATCH V7 10/12] riscv: Add config of thread stack size Date: Sat, 15 Oct 2022 07:47:00 -0400 Message-Id: <20221015114702.3489989-11-guoren@kernel.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20221015114702.3489989-1-guoren@kernel.org> References: <20221015114702.3489989-1-guoren@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221015_045119_370577_37AD2301 X-CRM114-Status: GOOD ( 11.65 ) 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 0cac21b02ba5 ("risc v: use 16KB kernel stack on 64-bit") increase the thread size mandatory, but some scenarios, such as D1 with a small memory footprint, would suffer from that. After independent irq stack support, let's give users a choice to determine their custom stack size. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Cc: Andreas Schwab --- arch/riscv/Kconfig | 10 ++++++++++ arch/riscv/include/asm/thread_info.h | 12 +----------- 2 files changed, 11 insertions(+), 11 deletions(-) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 7476ce9c72d5..2b72541f87b1 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -453,6 +453,16 @@ config IRQ_STACKS Add independent irq & softirq stacks for percpu to prevent kernel stack overflows. We may save some memory footprint by disabling IRQ_STACKS. +config THREAD_SIZE_ORDER + int "Kernel stack size (in power-of-two numbers of page size)" if VMAP_STACK && EXPERT + range 0 4 + default 1 if 32BIT && !KASAN + default 3 if 64BIT && KASAN + default 2 + help + Specify the Pages of thread stack size (from 4KB to 64KB), which also + affects irq stack size, which is equal to thread stack size. + endmenu # "Platform type" menu "Kernel features" diff --git a/arch/riscv/include/asm/thread_info.h b/arch/riscv/include/asm/thread_info.h index 043da8ccc7e6..c970d41dc4c6 100644 --- a/arch/riscv/include/asm/thread_info.h +++ b/arch/riscv/include/asm/thread_info.h @@ -11,18 +11,8 @@ #include #include -#ifdef CONFIG_KASAN -#define KASAN_STACK_ORDER 1 -#else -#define KASAN_STACK_ORDER 0 -#endif - /* thread information allocation */ -#ifdef CONFIG_64BIT -#define THREAD_SIZE_ORDER (2 + KASAN_STACK_ORDER) -#else -#define THREAD_SIZE_ORDER (1 + KASAN_STACK_ORDER) -#endif +#define THREAD_SIZE_ORDER CONFIG_THREAD_SIZE_ORDER #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) /*