From mboxrd@z Thu Jan 1 00:00:00 1970 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 4A7AAC6FD20 for ; Fri, 24 Mar 2023 07:14:57 +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=ASlUqEAV1F94xplU3SCGcEj0j0x8oejhbDrGJ+ov8A4=; b=vsjELv/OosPSFL SA9wew6Nk7llgaQOu0nabn9uWSMpMVT05Az2kNpUiUpbF57h80SRBjnE82PpMaxxQswq6SH5kMnr2 XZ9q7gtVVYP4ht7AKRUa2zTz0dQj4/Spv3uTipl6QJqFaCXIq81SWC7kJkgKFudUbrMwPVItROV+Q Q+yXj8mPmcR/hddosRgjcNxVpdErH7vtq1Xu6w5u+5eYOBDFwJu3OJGw2uygV1USRyhnQy+JiJFMk wgwsShuZNTP9Rn3QeOvCj8P6RtcM0TwudNoD+1BoMmwvlczTmGQENKshnbfF0ZDpiYCva5GxQo1vK UZj29TUzMsOEooL3hToA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pfbdT-003k0J-0A; Fri, 24 Mar 2023 07:14:51 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pfbdQ-003jyP-0Z for linux-riscv@lists.infradead.org; Fri, 24 Mar 2023 07:14:50 +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 C10E8B822B5; Fri, 24 Mar 2023 07:14:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 368CCC4339C; Fri, 24 Mar 2023 07:14:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1679642083; bh=5Apt43PtNAwm2BzPLMCNMaIA3jE930gvw1frsSZwRcA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bSt7xWTQ8EDfBmF/+gfDgrXxNbsKZkHQIvgyzDiebEdRbBPRSb1kfXqq5toIXzX4j kGptgJX058jI4BaeNWwWfyeES3V32qD5jH2NS7vJuzJSpzO6vxogJtaIi8WYVxb4mm VkfxphQZwF9/rbxXG85b/eCA3CTomFMfh3UzG8ywV5v1R3HlMfgqn32TU9tq1OXDdr G3+lDp17cBvLCYZN9q4itL2xe205klcxvA8xj9qT7FEwQE5m6cl3lLTNsitVXfo0ru Rox0R2BkH1VIj3g1lgyAVWtbA5qfWD6nVC2s6IZ7UOEgPVXA5YeSXq/dY4md4iroBb uSrC7JorAVjsA== 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, mark.rutland@arm.com, bjorn@kernel.org Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Guo Ren Subject: [PATCH -next V11 3/3] riscv: stack: Add config of thread stack size Date: Fri, 24 Mar 2023 03:12:39 -0400 Message-Id: <20230324071239.151677-4-guoren@kernel.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20230324071239.151677-1-guoren@kernel.org> References: <20230324071239.151677-1-guoren@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230324_001448_506909_39FD0B36 X-CRM114-Status: GOOD ( 12.21 ) 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 From: Guo Ren The commit 0cac21b02ba5 ("riscv: use 16KB kernel stack on 64-bit") increases 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 7b10af7d2479..f58a8e37f1d5 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -502,6 +502,16 @@ 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 ab60593eed99..41556ee84290 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) /* -- 2.36.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv