From patchwork Mon Jul 31 06:33:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Li, Xin3" X-Patchwork-Id: 128467 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:918b:0:b0:3e4:2afc:c1 with SMTP id s11csp1884312vqg; Mon, 31 Jul 2023 02:00:57 -0700 (PDT) X-Google-Smtp-Source: APBJJlEO8UX2Z2vKQBdBBP0Ej97avUay4N3nJgTL4jp1/JAGEqxcQ5P/mLQdLtDF4T67eWYYX48v X-Received: by 2002:a17:90a:9515:b0:262:e564:3ecb with SMTP id t21-20020a17090a951500b00262e5643ecbmr7768447pjo.36.1690794057224; Mon, 31 Jul 2023 02:00:57 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1690794057; cv=none; d=google.com; s=arc-20160816; b=wR/RG4qNyOkFoR9tOtbbQIZ8nQb0j90Q9j7C2avEtBcEWMh+w5DabN8v3+wgOZgiTC 6yVfErcqNNy2OGVOao3bMO85lnGXTfUQQ94NcUFChYhAfml1K0AMbQLkIskgyyEWfgSl foAzUAt0QtHuFJLhq0rb1UzXtfFt8d09h3+6/QWcD8YE0dpI1fQBtzEOFxrrF97be0OX lRWd7JFo+0PVoECOoE442wy6sjfjabpjwY0VDml7+LLB9grepFCoQ4DGYa1UplajNM8s c/WUokogkpy4ZzWrq/QJ5WifZj3cH8hVyL5onYHSRY2PihtBg8Ervp99KfvgjpfCQpAb FVmQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=G6NfwaThypL7ADR01StbsQIIOcxXUXd3lKQyMixQjW4=; fh=runz8kYc7mvoALl4f6YJmLswtUHBUyF5+hFgjyimmLU=; b=YFJvVNvxYIruw+h+zzPhqpdEN+yyZ3zJN9m9Ygab9DwtiEZrb0JtjtmC6Mux203vf7 XH/ZDH5eyhf5fDJleGLJSGEOTiDV2EWJZTdMhunCrnrgPYezGx2t+C7Mz7EPYmlwVo8v wqwv+f0Pt/LU5DPwVpbPZxkr/YmiFCgVFELrocqytLClHDJe/HqRF2U2qcVNCaVGUs2E PhShmvOIfAE9/7DQGI+M8YnKdAR8l1PMPWpeR0WU2J3jf/xoqrUlMSh5G0TtYS4rE1k2 EdrzIFU63cJSa4jHueRxjOK1CyCUVptPRTSGy2SfV5MljanOC2hxMT7HwOwP6nDpWeBC eRCg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=QocNXTlI; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id x62-20020a17090a6c4400b0025960d035c6si7155291pjj.138.2023.07.31.02.00.43; Mon, 31 Jul 2023 02:00:57 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=QocNXTlI; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230446AbjGaHFg (ORCPT + 99 others); Mon, 31 Jul 2023 03:05:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231293AbjGaHFL (ORCPT ); Mon, 31 Jul 2023 03:05:11 -0400 Received: from mgamail.intel.com (unknown [134.134.136.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6804E30C2; Mon, 31 Jul 2023 00:03:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1690787007; x=1722323007; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=X4MZTo9+yUn1bPdeMYVQLWvNe1DyIq6KwUj9R7l5YRg=; b=QocNXTlIXc34bawMb/E6KEk5BOVfTXd5aiGhQ8x+s6OXgz3JN+pMLZDe f0zoordHLjPtlYLmo2qSnu5I8JuVFADeMcZADUIEObyOPDlIgXJ2bj+0X y/kXP2Dz7kBDK1G7S4DGi1lGfJYJq5nOnQqWZoQzaw7k7OAxApxk6wbfQ gXCZEU5IqEki7e+b2zytPuA+AtINAMMpbE91HcN+Xag4SKVD4tQ8aKjIG 4lZ02HJUxwCytys+rVfeko6TqwCUwusgUPTPNGp5Njp5iYnHBz5RQaHEV V2M1D6x7Tn4GDJuIdOqLA+mcjg5fKxlc22Dg18NT+XZYHX6FnfElLqDMu A==; X-IronPort-AV: E=McAfee;i="6600,9927,10787"; a="371649458" X-IronPort-AV: E=Sophos;i="6.01,244,1684825200"; d="scan'208";a="371649458" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Jul 2023 00:02:15 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.01,202,1684825200"; d="scan'208";a="871543489" Received: from unknown (HELO fred..) ([172.25.112.68]) by fmsmga001.fm.intel.com with ESMTP; 31 Jul 2023 00:02:16 -0700 From: Xin Li To: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-edac@vger.kernel.org, linux-hyperv@vger.kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org Cc: Jonathan Corbet , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H . Peter Anvin" , Andy Lutomirski , Oleg Nesterov , Tony Luck , "K . Y . Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Paolo Bonzini , Wanpeng Li , Vitaly Kuznetsov , Sean Christopherson , Peter Zijlstra , Juergen Gross , Stefano Stabellini , Oleksandr Tyshchenko , Josh Poimboeuf , "Paul E . McKenney" , Catalin Marinas , Randy Dunlap , Steven Rostedt , Kim Phillips , Xin Li , Hyeonggon Yoo <42.hyeyoo@gmail.com>, "Liam R . Howlett" , Sebastian Reichel , "Kirill A . Shutemov" , Suren Baghdasaryan , Pawan Gupta , Jiaxi Chen , Babu Moger , Jim Mattson , Sandipan Das , Lai Jiangshan , Hans de Goede , Reinette Chatre , Daniel Sneddon , Breno Leitao , Nikunj A Dadhania , Brian Gerst , Sami Tolvanen , Alexander Potapenko , Andrew Morton , Arnd Bergmann , "Eric W . Biederman" , Kees Cook , Masami Hiramatsu , Masahiro Yamada , Ze Gao , Fei Li , Conghui , Ashok Raj , "Jason A . Donenfeld" , Mark Rutland , Jacob Pan , Jiapeng Chong , Jane Malalane , David Woodhouse , Boris Ostrovsky , Arnaldo Carvalho de Melo , Yantengsi , Christophe Leroy , Sathvika Vasireddy Subject: [PATCH v9 25/36] x86/traps: Add a system interrupt handler table for system interrupt dispatch Date: Sun, 30 Jul 2023 23:33:06 -0700 Message-Id: <20230731063317.3720-26-xin3.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230731063317.3720-1-xin3.li@intel.com> References: <20230731063317.3720-1-xin3.li@intel.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1772926068843033825 X-GMAIL-MSGID: 1772926068843033825 From: "H. Peter Anvin (Intel)" On x86, external interrupts can be categorized into two groups: 1) System interrupts 2) External device interrupts All external device interrupts are directed to the common_interrupt(), which, in turn, dispatches these external device interrupts using a per-CPU external device interrupt dispatch table vector_irq. To handle system interrupts, a system interrupt handler table needs to be introduced. This table enables the direct dispatching of a system interrupt to its corresponding handler. As a result, a software-based dispatch function will be implemented as: void external_interrupt(struct pt_regs *regs) { u8 vector = regs->vector; if (is_system_interrupt(vector)) system_interrupt_handlers[vector_to_sysvec(vector)](regs); else /* external device interrupt */ common_interrupt(regs); } Signed-off-by: H. Peter Anvin (Intel) Co-developed-by: Xin Li Tested-by: Shan Kang Signed-off-by: Xin Li --- Changes since v8: * Remove junk code that assumes no local APIC on x86_64 (Thomas Gleixner). Changes since v5: * Initialize system_interrupt_handlers with dispatch_table_spurious_interrupt() instead of NULL to get rid of any NULL check (Peter Zijlstra). --- arch/x86/kernel/traps.c | 50 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index 49dd92458eb0..e430a8c47931 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -1488,6 +1488,56 @@ DEFINE_IDTENTRY_SW(iret_error) } #endif +#ifdef CONFIG_X86_64 + +static void dispatch_table_spurious_interrupt(struct pt_regs *regs) +{ + dispatch_spurious_interrupt(regs, regs->vector); +} + +#define SYSV(x,y) [(x) - FIRST_SYSTEM_VECTOR] = y + +static system_interrupt_handler system_interrupt_handlers[NR_SYSTEM_VECTORS] = { + [0 ... NR_SYSTEM_VECTORS-1] = dispatch_table_spurious_interrupt, +#ifdef CONFIG_SMP + SYSV(RESCHEDULE_VECTOR, dispatch_table_sysvec_reschedule_ipi), + SYSV(CALL_FUNCTION_VECTOR, dispatch_table_sysvec_call_function), + SYSV(CALL_FUNCTION_SINGLE_VECTOR, dispatch_table_sysvec_call_function_single), + SYSV(REBOOT_VECTOR, dispatch_table_sysvec_reboot), +#endif + +#ifdef CONFIG_X86_THERMAL_VECTOR + SYSV(THERMAL_APIC_VECTOR, dispatch_table_sysvec_thermal), +#endif + +#ifdef CONFIG_X86_MCE_THRESHOLD + SYSV(THRESHOLD_APIC_VECTOR, dispatch_table_sysvec_threshold), +#endif + +#ifdef CONFIG_X86_MCE_AMD + SYSV(DEFERRED_ERROR_VECTOR, dispatch_table_sysvec_deferred_error), +#endif + +#ifdef CONFIG_X86_LOCAL_APIC + SYSV(LOCAL_TIMER_VECTOR, dispatch_table_sysvec_apic_timer_interrupt), + SYSV(X86_PLATFORM_IPI_VECTOR, dispatch_table_sysvec_x86_platform_ipi), +# ifdef CONFIG_HAVE_KVM + SYSV(POSTED_INTR_VECTOR, dispatch_table_sysvec_kvm_posted_intr_ipi), + SYSV(POSTED_INTR_WAKEUP_VECTOR, dispatch_table_sysvec_kvm_posted_intr_wakeup_ipi), + SYSV(POSTED_INTR_NESTED_VECTOR, dispatch_table_sysvec_kvm_posted_intr_nested_ipi), +# endif +# ifdef CONFIG_IRQ_WORK + SYSV(IRQ_WORK_VECTOR, dispatch_table_sysvec_irq_work), +# endif + SYSV(SPURIOUS_APIC_VECTOR, dispatch_table_sysvec_spurious_apic_interrupt), + SYSV(ERROR_APIC_VECTOR, dispatch_table_sysvec_error_interrupt), +#endif +}; + +#undef SYSV + +#endif /* CONFIG_X86_64 */ + void __init trap_init(void) { /* Init cpu_entry_area before IST entries are set up */