From patchwork Thu Dec 8 02:58:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guo Ren X-Patchwork-Id: 13067849 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 97805C4708D for ; Thu, 8 Dec 2022 03:00:24 +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=yOp+cKYrMAn+yquoT2yCUKeggTd/HD0Fl+bODa9eTH0=; b=dpY+FUX5OgQ0xk zIMrD8Bl2aRj55Up+3mI4nNQerQnnq4n32ynkAyQCH/JxVnWxPKa4elgUqH9nwTdRcABHl5ek4Lc/ PAkZfsgPwvlP0rTiMH7A95wohaL6RtAozKPv2cJVoitAzOAvKrmlDnVGPMAJfq5VjzvH8oZYOidBF 016MsrSSICgrrQYWk/EGmQ881ie7yy+BqOEAynQrMPYWutgEOGQ3u26Rc2JIwQi8yt0E5L+DkCcnN DNbERYDUd8C8UyDa0tXtVPdmKvyMjEiMb9+2qc6HNqi8PJ7m4/N3UliGcTb3f/Ac2wt3o8ES2782W 4tBoDPnzhhSWqLxPlz7Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1p378y-000dMg-Nc; Thu, 08 Dec 2022 03:00:16 +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 1p378t-000dG1-A0 for linux-riscv@lists.infradead.org; Thu, 08 Dec 2022 03:00:14 +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 E4C1FB82202; Thu, 8 Dec 2022 03:00:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B407EC433D7; Thu, 8 Dec 2022 02:59:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1670468408; bh=gadY8OsNJ4C2VcA97+/Vkul7uDTqq5k2F2atJx1sXvg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YFAi76HGyGTdi7lktBkHSY1g6SZf+ann7tXwZVW6yd82aeQmn+xz/Agxr7oSXTaAa k4JmHfN/a/sLVt3trtEt+14jyfSDZ6l/aLd6iYPEkCSR8eOqzyggFaXqTfCx7hRAPm f4Ibe11TAfHHVuUDPcEmsmqECyDdP4Q/xDwbKQ+/jHK0T59GDNvE+ehGBfHJJyD+hO JJnt2kb3Y8Xa/yIidadbT5XuobtF/A3WyLkFz58sQHv56xrZS+Kznn1el9h/R7NaNC Iu5pHxhH5j7xLJ2SL097aIpOYhQ00J4xZrCXfhgThkk2gE1ikOnybb9eSRP7QQQu5m WYUhvGJklYRLg== 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, ben@decadent.org.uk, bjorn@kernel.org Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Guo Ren Subject: [PATCH -next V10 10/10] riscv: stack: Add config of thread stack size Date: Wed, 7 Dec 2022 21:58:16 -0500 Message-Id: <20221208025816.138712-11-guoren@kernel.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20221208025816.138712-1-guoren@kernel.org> References: <20221208025816.138712-1-guoren@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221207_190012_058633_2EE76D6E X-CRM114-Status: GOOD ( 11.66 ) 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. Link: https://lore.kernel.org/linux-riscv/5f6e6c39-b846-4392-b468-02202404de28@www.fastmail.com/ Suggested-by: Arnd Bergmann Tested-by: Jisheng Zhang Signed-off-by: Guo Ren Signed-off-by: Guo Ren --- 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 bd4c4ae4cdc9..60202cd5c5ae 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -455,6 +455,16 @@ 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) /*