From patchwork Mon Mar 27 07:58:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Li, Xin3" X-Patchwork-Id: 13188729 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5F27EC761A6 for ; Mon, 27 Mar 2023 08:24:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233050AbjC0IYh (ORCPT ); Mon, 27 Mar 2023 04:24:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59604 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232797AbjC0IYd (ORCPT ); Mon, 27 Mar 2023 04:24:33 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5E549273A; Mon, 27 Mar 2023 01:24:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1679905472; x=1711441472; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=/O/qXmHKArMjAWeJZsFCxyoE2+USZF2ezTlQhvzsStE=; b=VD2/hyTDjbaRSd1c0VZ98zPJYCFNup19n9CE1sulY3kXZSiU1yAj6pSA PMKP0RAW7ueKZgYnS2r/S/4mIpAl4lJ4XgWGOXYk5VQ1Vuhkyodd+tHl5 XlgBVdRTZ4pdw7cBSvKlB3cWlUHJRYqXRumbuzBSraXYQd1DTZtGvClSa pJAo6WRM1FlPar2UfgePcWEKXq5x52JKiICJqH2fZ03V8bMWiRk1XY47w Jvq8QTepNFp206RpJzIqOBD+pHp8KweBHPB3mOZtN71YedU4y+OQz1k3S lZakRtJBrW+fovpNlrbhzSgT9M9u1g+7fVlLfcbIQgUF7jhKkRARb/u/M Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10661"; a="338930115" X-IronPort-AV: E=Sophos;i="5.98,294,1673942400"; d="scan'208";a="338930115" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Mar 2023 01:24:31 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10661"; a="713787040" X-IronPort-AV: E=Sophos;i="5.98,294,1673942400"; d="scan'208";a="713787040" Received: from unknown (HELO fred..) ([172.25.112.68]) by orsmga008.jf.intel.com with ESMTP; 27 Mar 2023 01:24:30 -0700 From: Xin Li To: linux-kernel@vger.kernel.org, x86@kernel.org, kvm@vger.kernel.org Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, peterz@infradead.org, andrew.cooper3@citrix.com, seanjc@google.com, pbonzini@redhat.com, ravi.v.shankar@intel.com, jiangshanlai@gmail.com, shan.kang@intel.com Subject: [PATCH v6 04/33] x86/traps: add install_system_interrupt_handler() Date: Mon, 27 Mar 2023 00:58:09 -0700 Message-Id: <20230327075838.5403-5-xin3.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230327075838.5403-1-xin3.li@intel.com> References: <20230327075838.5403-1-xin3.li@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Some kernel components install system interrupt handlers into the IDT, and we need to do the same for system_interrupt_handlers. A new function install_system_interrupt_handler() is added to install a system interrupt handler into both the IDT and system_interrupt_handlers. Tested-by: Shan Kang Signed-off-by: Xin Li --- arch/x86/include/asm/traps.h | 2 ++ arch/x86/kernel/cpu/acrn.c | 7 +++++-- arch/x86/kernel/cpu/mshyperv.c | 22 ++++++++++++++-------- arch/x86/kernel/kvm.c | 4 +++- arch/x86/kernel/traps.c | 10 ++++++++++ drivers/xen/events/events_base.c | 5 ++++- 6 files changed, 38 insertions(+), 12 deletions(-) diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h index 28c8ba5fd81c..46f5e4e2a346 100644 --- a/arch/x86/include/asm/traps.h +++ b/arch/x86/include/asm/traps.h @@ -41,6 +41,8 @@ void math_emulate(struct math_emu_info *); bool fault_in_kernel_space(unsigned long address); +void install_system_interrupt_handler(unsigned int n, const void *asm_addr, const void *addr); + #ifdef CONFIG_VMAP_STACK void __noreturn handle_stack_overflow(struct pt_regs *regs, unsigned long fault_address, diff --git a/arch/x86/kernel/cpu/acrn.c b/arch/x86/kernel/cpu/acrn.c index 485441b7f030..9351bf183a9e 100644 --- a/arch/x86/kernel/cpu/acrn.c +++ b/arch/x86/kernel/cpu/acrn.c @@ -18,6 +18,7 @@ #include #include #include +#include static u32 __init acrn_detect(void) { @@ -26,8 +27,10 @@ static u32 __init acrn_detect(void) static void __init acrn_init_platform(void) { - /* Setup the IDT for ACRN hypervisor callback */ - alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, asm_sysvec_acrn_hv_callback); + /* Install system interrupt handler for ACRN hypervisor callback */ + install_system_interrupt_handler(HYPERVISOR_CALLBACK_VECTOR, + asm_sysvec_acrn_hv_callback, + sysvec_acrn_hv_callback); x86_platform.calibrate_tsc = acrn_get_tsc_khz; x86_platform.calibrate_cpu = acrn_get_tsc_khz; diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index f36dc2f796c5..63282f4bfdcd 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -29,6 +29,7 @@ #include #include #include +#include #include #include #include @@ -487,19 +488,24 @@ static void __init ms_hyperv_init_platform(void) */ x86_platform.apic_post_init = hyperv_init; hyperv_setup_mmu_ops(); - /* Setup the IDT for hypervisor callback */ - alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, asm_sysvec_hyperv_callback); - /* Setup the IDT for reenlightenment notifications */ + /* Install system interrupt handler for hypervisor callback */ + install_system_interrupt_handler(HYPERVISOR_CALLBACK_VECTOR, + asm_sysvec_hyperv_callback, + sysvec_hyperv_callback); + + /* Install system interrupt handler for reenlightenment notifications */ if (ms_hyperv.features & HV_ACCESS_REENLIGHTENMENT) { - alloc_intr_gate(HYPERV_REENLIGHTENMENT_VECTOR, - asm_sysvec_hyperv_reenlightenment); + install_system_interrupt_handler(HYPERV_REENLIGHTENMENT_VECTOR, + asm_sysvec_hyperv_reenlightenment, + sysvec_hyperv_reenlightenment); } - /* Setup the IDT for stimer0 */ + /* Install system interrupt handler for stimer0 */ if (ms_hyperv.misc_features & HV_STIMER_DIRECT_MODE_AVAILABLE) { - alloc_intr_gate(HYPERV_STIMER0_VECTOR, - asm_sysvec_hyperv_stimer0); + install_system_interrupt_handler(HYPERV_STIMER0_VECTOR, + asm_sysvec_hyperv_stimer0, + sysvec_hyperv_stimer0); } # ifdef CONFIG_SMP diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c index 1cceac5984da..5c684df6de7a 100644 --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -829,7 +829,9 @@ static void __init kvm_guest_init(void) if (kvm_para_has_feature(KVM_FEATURE_ASYNC_PF_INT) && kvmapf) { static_branch_enable(&kvm_async_pf_enabled); - alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, asm_sysvec_kvm_asyncpf_interrupt); + install_system_interrupt_handler(HYPERVISOR_CALLBACK_VECTOR, + asm_sysvec_kvm_asyncpf_interrupt, + sysvec_kvm_asyncpf_interrupt); } #ifdef CONFIG_SMP diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index 2cbe7e7e8b96..12072e2af4a6 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -1513,6 +1513,16 @@ static system_interrupt_handler system_interrupt_handlers[NR_SYSTEM_VECTORS] = { #endif /* CONFIG_X86_64 */ +void __init install_system_interrupt_handler(unsigned int n, const void *asm_addr, const void *addr) +{ + BUG_ON(n < FIRST_SYSTEM_VECTOR); + +#ifdef CONFIG_X86_64 + system_interrupt_handlers[n - FIRST_SYSTEM_VECTOR] = (system_interrupt_handler)addr; +#endif + alloc_intr_gate(n, asm_addr); +} + void __init trap_init(void) { /* Init cpu_entry_area before IST entries are set up */ diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c index c7715f8bd452..cf1a5ca3bf62 100644 --- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -45,6 +45,7 @@ #include #include #include +#include #include #include #endif @@ -2249,7 +2250,9 @@ static __init void xen_alloc_callback_vector(void) return; pr_info("Xen HVM callback vector for event delivery is enabled\n"); - alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, asm_sysvec_xen_hvm_callback); + install_system_interrupt_handler(HYPERVISOR_CALLBACK_VECTOR, + asm_sysvec_xen_hvm_callback, + sysvec_xen_hvm_callback); } #else void xen_setup_callback_vector(void) {}