From patchwork Tue Jun 16 03:10:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 11606291 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1F8C0913 for ; Tue, 16 Jun 2020 03:10:57 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id CF1CF20734 for ; Tue, 16 Jun 2020 03:10:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="cwNtpQhx" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CF1CF20734 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject: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=E90MgQmIbGn7m1pxyh+jYxuVRiBSxUHUXUbmpv/37rU=; b=cwN tpQhx2Dn3G/JxIEfhoY8Yfaygt8JlPRip2oYJAirxVPjg3pnEKd2u3u8pbbKSw+QLQ8FVfjBO0Xdi LHHCbNbbIQDPF92QPqnqR/MwHDsT/VOK05bwihA3SNu/oeRRoij8nCF/cdhD96Ws/xh5tfOP/8XYn GA3prtimOMSfVEL4KXNy4bZnjdTpedYRetlLfyy+EqfgJN1PgTwCGNrB6Kvz8A+jNJ/zc/2ODyjfb pZaTVZURjxoW1RTRY0POShjHl5Fb801jh7H1DTOdq5Nvc51w7b+2jKHf3g3vMDMiYot2bO3Pi5TNa C8ZhKUuU2Eqm47KobYgzJ0eWEDFw/Qg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jl1zp-0005xL-NO; Tue, 16 Jun 2020 03:10:45 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jl1zm-0005wv-8Y for linux-arm-kernel@lists.infradead.org; Tue, 16 Jun 2020 03:10:43 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 8B0A81FB; Mon, 15 Jun 2020 20:10:40 -0700 (PDT) Received: from p8cg001049571a15.arm.com (unknown [10.163.80.105]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id BE0DC3F6CF; Mon, 15 Jun 2020 20:10:37 -0700 (PDT) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org Subject: [PATCH] arm64/panic: Unify all three existing notifier blocks Date: Tue, 16 Jun 2020 08:40:17 +0530 Message-Id: <1592277017-31784-1-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200615_201042_400161_B2CF8D47 X-CRM114-Status: GOOD ( 12.53 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [217.140.110.172 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Steve Capper , Catalin Marinas , Anshuman Khandual , linux-kernel@vger.kernel.org, Will Deacon MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Currently there are three different registered panic notifier blocks. This unifies all of them into a single one i.e arm64_panic_block, hence reducing code duplication and required calling sequence during panic. This preserves the existing dump sequence. Cc: Catalin Marinas Cc: Will Deacon Cc: Steve Capper Cc: Mark Rutland Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual Reported-by: kernel test robot Reported-by: kernel test robot --- Applies on 5.8-rc1. arch/arm64/include/asm/cpufeature.h | 1 + arch/arm64/include/asm/memory.h | 1 + arch/arm64/kernel/cpufeature.c | 15 +-------------- arch/arm64/kernel/setup.c | 24 ++++++++++++++---------- arch/arm64/mm/init.c | 18 +----------------- 5 files changed, 18 insertions(+), 41 deletions(-) diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index 5d1f4ae42799..e375529ca9fc 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -774,6 +774,7 @@ static inline unsigned int get_vmid_bits(u64 mmfr1) } u32 get_kvm_ipa_limit(void); +void dump_cpu_features(void); #endif /* __ASSEMBLY__ */ diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index a1871bb32bb1..2a88cb734d06 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -322,6 +322,7 @@ static inline void *phys_to_virt(phys_addr_t x) __is_lm_address(__addr) && pfn_valid(virt_to_pfn(__addr)); \ }) +void dump_mem_limit(void); #endif /* !ASSEMBLY */ /* diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 2270eda9a7fb..756775f4b7d4 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -119,24 +119,11 @@ static inline void finalize_system_capabilities(void) static_branch_enable(&arm64_const_caps_ready); } -static int dump_cpu_hwcaps(struct notifier_block *self, unsigned long v, void *p) +void dump_cpu_features(void) { /* file-wide pr_fmt adds "CPU features: " prefix */ pr_emerg("0x%*pb\n", ARM64_NCAPS, &cpu_hwcaps); - return 0; -} - -static struct notifier_block cpu_hwcaps_notifier = { - .notifier_call = dump_cpu_hwcaps -}; - -static int __init register_cpu_hwcaps_dumper(void) -{ - atomic_notifier_chain_register(&panic_notifier_list, - &cpu_hwcaps_notifier); - return 0; } -__initcall(register_cpu_hwcaps_dumper); DEFINE_STATIC_KEY_ARRAY_FALSE(cpu_hwcap_keys, ARM64_NCAPS); EXPORT_SYMBOL(cpu_hwcap_keys); diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index 93b3844cf442..312b19263cb7 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -400,11 +400,7 @@ static int __init topology_init(void) } subsys_initcall(topology_init); -/* - * Dump out kernel offset information on panic. - */ -static int dump_kernel_offset(struct notifier_block *self, unsigned long v, - void *p) +void dump_kernel_offset(void) { const unsigned long offset = kaslr_offset(); @@ -415,17 +411,25 @@ static int dump_kernel_offset(struct notifier_block *self, unsigned long v, } else { pr_emerg("Kernel Offset: disabled\n"); } +} + +static int arm64_panic_block_dump(struct notifier_block *self, + unsigned long v, void *p) +{ + dump_kernel_offset(); + dump_cpu_features(); + dump_mem_limit(); return 0; } -static struct notifier_block kernel_offset_notifier = { - .notifier_call = dump_kernel_offset +static struct notifier_block arm64_panic_block = { + .notifier_call = arm64_panic_block_dump }; -static int __init register_kernel_offset_dumper(void) +static int __init register_arm64_panic_block(void) { atomic_notifier_chain_register(&panic_notifier_list, - &kernel_offset_notifier); + &arm64_panic_block); return 0; } -__initcall(register_kernel_offset_dumper); +__initcall(register_arm64_panic_block); diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index e631e6425165..b88ef04033de 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -558,27 +558,11 @@ void free_initmem(void) unmap_kernel_range((u64)__init_begin, (u64)(__init_end - __init_begin)); } -/* - * Dump out memory limit information on panic. - */ -static int dump_mem_limit(struct notifier_block *self, unsigned long v, void *p) +void dump_mem_limit(void) { if (memory_limit != PHYS_ADDR_MAX) { pr_emerg("Memory Limit: %llu MB\n", memory_limit >> 20); } else { pr_emerg("Memory Limit: none\n"); } - return 0; -} - -static struct notifier_block mem_limit_notifier = { - .notifier_call = dump_mem_limit, -}; - -static int __init register_mem_limit_dumper(void) -{ - atomic_notifier_chain_register(&panic_notifier_list, - &mem_limit_notifier); - return 0; } -__initcall(register_mem_limit_dumper);