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Mon, 10 Feb 2025 15:47:13 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id SG3hJ4EfqmdPPgAAD6G6ig (envelope-from ); Mon, 10 Feb 2025 15:47:13 +0000 From: Nikolay Borisov To: linux-edac@vger.kernel.org Cc: linux-kernel@vger.kernel.org, x86@kernel.org, tony.luck@intel.com, Nikolay Borisov Subject: [PATCH v2 1/3] x86/mce/inject: Remove call to mce_notify_irq() Date: Mon, 10 Feb 2025 17:47:04 +0200 Message-ID: <20250210154707.114219-2-nik.borisov@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250210154707.114219-1-nik.borisov@suse.com> References: <20250210154707.114219-1-nik.borisov@suse.com> Precedence: bulk X-Mailing-List: linux-edac@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Rspamd-Queue-Id: 1C3061F7B0 X-Spam-Score: -3.01 X-Rspamd-Action: no action X-Spamd-Result: default: False [-3.01 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; 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Remove this call and as a result make mce_notify_irq() static Signed-off-by: Nikolay Borisov --- arch/x86/include/asm/mce.h | 2 -- arch/x86/kernel/cpu/mce/core.c | 44 ++++++++++++++++---------------- arch/x86/kernel/cpu/mce/inject.c | 1 - 3 files changed, 22 insertions(+), 25 deletions(-) diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h index eb2db07ef39c..6c77c03139f7 100644 --- a/arch/x86/include/asm/mce.h +++ b/arch/x86/include/asm/mce.h @@ -296,8 +296,6 @@ enum mcp_flags { void machine_check_poll(enum mcp_flags flags, mce_banks_t *b); -bool mce_notify_irq(void); - DECLARE_PER_CPU(struct mce, injectm); /* Disable CMCI/polling for MCA bank claimed by firmware */ diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index 0dc00c9894c7..89625ff79c3b 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -584,6 +584,28 @@ bool mce_is_correctable(struct mce *m) } EXPORT_SYMBOL_GPL(mce_is_correctable); +/* + * Notify the user(s) about new machine check events. + * Can be called from interrupt context, but not from machine check/NMI + * context. + */ +static int mce_notify_irq(void) +{ + /* Not more than two messages every minute */ + static DEFINE_RATELIMIT_STATE(ratelimit, 60*HZ, 2); + + if (test_and_clear_bit(0, &mce_need_notify)) { + mce_work_trigger(); + + if (__ratelimit(&ratelimit)) + pr_info(HW_ERR "Machine check events logged\n"); + + return 1; + } + + return 0; +} + static int mce_early_notifier(struct notifier_block *nb, unsigned long val, void *data) { @@ -1773,28 +1795,6 @@ static void mce_timer_delete_all(void) del_timer_sync(&per_cpu(mce_timer, cpu)); } -/* - * Notify the user(s) about new machine check events. - * Can be called from interrupt context, but not from machine check/NMI - * context. - */ -bool mce_notify_irq(void) -{ - /* Not more than two messages every minute */ - static DEFINE_RATELIMIT_STATE(ratelimit, 60*HZ, 2); - - if (test_and_clear_bit(0, &mce_need_notify)) { - mce_work_trigger(); - - if (__ratelimit(&ratelimit)) - pr_info(HW_ERR "Machine check events logged\n"); - - return true; - } - return false; -} -EXPORT_SYMBOL_GPL(mce_notify_irq); - static void __mcheck_cpu_mce_banks_init(void) { struct mce_bank *mce_banks = this_cpu_ptr(mce_banks_array); diff --git a/arch/x86/kernel/cpu/mce/inject.c b/arch/x86/kernel/cpu/mce/inject.c index 313fe682db33..06e3cf7229ce 100644 --- a/arch/x86/kernel/cpu/mce/inject.c +++ b/arch/x86/kernel/cpu/mce/inject.c @@ -229,7 +229,6 @@ static int raise_local(void) } else if (m->status) { pr_info("Starting machine check poll CPU %d\n", cpu); raise_poll(m); - mce_notify_irq(); pr_info("Machine check poll done on CPU %d\n", cpu); } else m->finished = 0; From patchwork Mon Feb 10 15:47:05 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nikolay Borisov X-Patchwork-Id: 13968086 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.223.130]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7DFB624BCF9; Mon, 10 Feb 2025 15:47:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.135.223.130 ARC-Seal: i=1; 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Mon, 10 Feb 2025 15:47:14 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id IH5RBoIfqmdPPgAAD6G6ig (envelope-from ); Mon, 10 Feb 2025 15:47:14 +0000 From: Nikolay Borisov To: linux-edac@vger.kernel.org Cc: linux-kernel@vger.kernel.org, x86@kernel.org, tony.luck@intel.com, Nikolay Borisov Subject: [PATCH v2 2/3] x86/mce: Move message printing from mce_notify_irq to mce_early_notifier() Date: Mon, 10 Feb 2025 17:47:05 +0200 Message-ID: <20250210154707.114219-3-nik.borisov@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250210154707.114219-1-nik.borisov@suse.com> References: <20250210154707.114219-1-nik.borisov@suse.com> Precedence: bulk X-Mailing-List: linux-edac@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Level: X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-0.999]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_FIVE(0.00)[5]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.com:email,suse.com:mid]; RCVD_TLS_ALL(0.00)[] X-Spam-Score: -2.80 X-Spam-Flag: NO Informing the user that an MCE has been logged from mce_notify_irq() is somewhat misleading because whether the MCE has been logged actually depends on whether CONFIG_X86_MCELOG_LEGACY is turned on or not. Furthermore it was reported that actually having a message triggered when an MCE is generated can be helpful in certain scenarios. Improve the situation by lifting the printing to the generic mce_early_notifier() as it's executed always and is independent of any compile-time option. Link: https://lore.kernel.org/all/CY8PR11MB7134D97F82DC001AE009637889E32@CY8PR11MB7134.namprd11.prod.outlook.com/ Signed-off-by: Nikolay Borisov --- arch/x86/kernel/cpu/mce/core.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index 89625ff79c3b..d55b1903fde6 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -591,15 +591,8 @@ EXPORT_SYMBOL_GPL(mce_is_correctable); */ static int mce_notify_irq(void) { - /* Not more than two messages every minute */ - static DEFINE_RATELIMIT_STATE(ratelimit, 60*HZ, 2); - if (test_and_clear_bit(0, &mce_need_notify)) { mce_work_trigger(); - - if (__ratelimit(&ratelimit)) - pr_info(HW_ERR "Machine check events logged\n"); - return 1; } @@ -609,6 +602,8 @@ static int mce_notify_irq(void) static int mce_early_notifier(struct notifier_block *nb, unsigned long val, void *data) { + /* Not more than two messages every minute */ + static DEFINE_RATELIMIT_STATE(ratelimit, 60*HZ, 2); 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Mon, 10 Feb 2025 15:47:14 +0000 From: Nikolay Borisov To: linux-edac@vger.kernel.org Cc: linux-kernel@vger.kernel.org, x86@kernel.org, tony.luck@intel.com, Nikolay Borisov Subject: [PATCH v2 3/3] x86/mce: Make mce_notify_irq() depend on CONFIG_X86_MCELOG_LEGACY Date: Mon, 10 Feb 2025 17:47:06 +0200 Message-ID: <20250210154707.114219-4-nik.borisov@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250210154707.114219-1-nik.borisov@suse.com> References: <20250210154707.114219-1-nik.borisov@suse.com> Precedence: bulk X-Mailing-List: linux-edac@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Rspamd-Queue-Id: F3DF61F7B9 X-Spam-Score: -3.01 X-Rspamd-Action: no action X-Spamd-Result: default: False [-3.01 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_MISSING_CHARSET(0.50)[]; R_DKIM_ALLOW(-0.20)[suse.com:s=susede1]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; MIME_TRACE(0.00)[0:+]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; TO_DN_SOME(0.00)[]; FUZZY_BLOCKED(0.00)[rspamd.com]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo,suse.com:dkim,suse.com:mid,suse.com:email]; RCVD_TLS_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; RCPT_COUNT_FIVE(0.00)[5]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; DKIM_TRACE(0.00)[suse.com:+] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spam-Flag: NO X-Spam-Level: mce_notify_irq() really depends on the legacy mcelog being enabled as otherwise mce_work_trigger() will never schedule the trigger work as mce_helper can't be set unless CONFIG_X86_MCELOG_LEGACY is defined. Signed-off-by: Nikolay Borisov --- arch/x86/kernel/cpu/mce/core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index d55b1903fde6..8b8553e144ce 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -591,11 +591,13 @@ EXPORT_SYMBOL_GPL(mce_is_correctable); */ static int mce_notify_irq(void) { +#ifdef CONFIG_X86_MCELOG_LEGACY + if (test_and_clear_bit(0, &mce_need_notify)) { mce_work_trigger(); return 1; } - +#endif return 0; }