From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6E7841C2BC; Mon, 15 Jan 2024 23:27:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="LI16xNMh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DE6A0C433C7; Mon, 15 Jan 2024 23:27:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1705361246; bh=SLjTFVzCCuFtlCTLtbQ8mH7lK3/LrsRsGGDoB43LPJQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LI16xNMh5cNPH5hn5aIIF+HNsWkDmq35wqPe8QDIq+YYf9FojELEQjfJqjU+3MPC6 HG23tpCPi8ZYC4WQQTS+9x3UAV2rWGDIQUxSj5WKAheDwA8Gy7S9T31b1NCVft3Ayo 2mEoDzYcNt4BLqv8F1xmPfiRr5MH9U9ziThNc5uWqTbA44XmhonWd7VT58xCx39u9L MyiK0QoPsI0c5NYQUwdI/HLnFOw/Wc73I+vXDIdLKAECN1nis9W/m++a8/PFd92V0Y 3qxBKsg7OItxRYOoagDDRNf3mXg7M4byViDYcX0N1gbD2CetYQOBKK3cPBk7xms/dG PDWJzz1Wae/fw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Huang Shijie , Catalin Marinas , Will Deacon , Sasha Levin , gregkh@linuxfoundation.org, linux-arm-kernel@lists.infradead.org, linux-arch@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 03/12] arm64: irq: set the correct node for VMAP stack Date: Mon, 15 Jan 2024 18:26:48 -0500 Message-ID: <20240115232718.209642-3-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240115232718.209642-1-sashal@kernel.org> References: <20240115232718.209642-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.147 Content-Transfer-Encoding: 8bit From: Huang Shijie [ Upstream commit 75b5e0bf90bffaca4b1f19114065dc59f5cc161f ] In current code, init_irq_stacks() will call cpu_to_node(). The cpu_to_node() depends on percpu "numa_node" which is initialized in: arch_call_rest_init() --> rest_init() -- kernel_init() --> kernel_init_freeable() --> smp_prepare_cpus() But init_irq_stacks() is called in init_IRQ() which is before arch_call_rest_init(). So in init_irq_stacks(), the cpu_to_node() does not work, it always return 0. In NUMA, it makes the node 1 cpu accesses the IRQ stack which is in the node 0. This patch fixes it by: 1.) export the early_cpu_to_node(), and use it in the init_irq_stacks(). 2.) change init_irq_stacks() to __init function. Reviewed-by: Catalin Marinas Signed-off-by: Huang Shijie Link: https://lore.kernel.org/r/20231124031513.81548-1-shijie@os.amperecomputing.com Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- arch/arm64/kernel/irq.c | 5 +++-- drivers/base/arch_numa.c | 2 +- include/asm-generic/numa.h | 2 ++ 3 files changed, 6 insertions(+), 3 deletions(-) diff --git a/arch/arm64/kernel/irq.c b/arch/arm64/kernel/irq.c index bda49430c9ea..dab45f19df49 100644 --- a/arch/arm64/kernel/irq.c +++ b/arch/arm64/kernel/irq.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -48,13 +49,13 @@ static void init_irq_scs(void) } #ifdef CONFIG_VMAP_STACK -static void init_irq_stacks(void) +static void __init init_irq_stacks(void) { int cpu; unsigned long *p; for_each_possible_cpu(cpu) { - p = arch_alloc_vmap_stack(IRQ_STACK_SIZE, cpu_to_node(cpu)); + p = arch_alloc_vmap_stack(IRQ_STACK_SIZE, early_cpu_to_node(cpu)); per_cpu(irq_stack_ptr, cpu) = p; } } diff --git a/drivers/base/arch_numa.c b/drivers/base/arch_numa.c index 00fb4120a5b3..bce0902dccb4 100644 --- a/drivers/base/arch_numa.c +++ b/drivers/base/arch_numa.c @@ -144,7 +144,7 @@ void __init early_map_cpu_to_node(unsigned int cpu, int nid) unsigned long __per_cpu_offset[NR_CPUS] __read_mostly; EXPORT_SYMBOL(__per_cpu_offset); -static int __init early_cpu_to_node(int cpu) +int __init early_cpu_to_node(int cpu) { return cpu_to_node_map[cpu]; } diff --git a/include/asm-generic/numa.h b/include/asm-generic/numa.h index 1a3ad6d29833..c32e0cf23c90 100644 --- a/include/asm-generic/numa.h +++ b/include/asm-generic/numa.h @@ -35,6 +35,7 @@ int __init numa_add_memblk(int nodeid, u64 start, u64 end); void __init numa_set_distance(int from, int to, int distance); void __init numa_free_distance(void); void __init early_map_cpu_to_node(unsigned int cpu, int nid); +int __init early_cpu_to_node(int cpu); void numa_store_cpu_info(unsigned int cpu); void numa_add_cpu(unsigned int cpu); void numa_remove_cpu(unsigned int cpu); @@ -46,6 +47,7 @@ static inline void numa_add_cpu(unsigned int cpu) { } static inline void numa_remove_cpu(unsigned int cpu) { } static inline void arch_numa_init(void) { } static inline void early_map_cpu_to_node(unsigned int cpu, int nid) { } +static inline int early_cpu_to_node(int cpu) { return 0; } #endif /* CONFIG_NUMA */ -- 2.43.0