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From: Xin Li <xin3.li@intel.com>
To: linux-kernel@vger.kernnel.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, seanjc@google.com,
	pbonzini@redhat.com, kevin.tian@intel.com
Subject: [PATCH 1/6] x86/traps: let common_interrupt() handle IRQ_MOVE_CLEANUP_VECTOR
Date: Wed,  9 Nov 2022 21:53:42 -0800	[thread overview]
Message-ID: <20221110055347.7463-2-xin3.li@intel.com> (raw)
In-Reply-To: <20221110055347.7463-1-xin3.li@intel.com>

From: "H. Peter Anvin (Intel)" <hpa@zytor.com>

IRQ_MOVE_CLEANUP_VECTOR is the only one of the system IRQ vectors that
is *below* FIRST_SYSTEM_VECTOR. It is a slow path, so just push it
into common_interrupt() just before the spurios interrupt handling.

Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Signed-off-by: Xin Li <xin3.li@intel.com>
---
 arch/x86/kernel/irq.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 766ffe3ba313..7e125fff45ab 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -248,6 +248,10 @@ DEFINE_IDTENTRY_IRQ(common_interrupt)
 	desc = __this_cpu_read(vector_irq[vector]);
 	if (likely(!IS_ERR_OR_NULL(desc))) {
 		handle_irq(desc, regs);
+#ifdef CONFIG_SMP
+	} else if (vector == IRQ_MOVE_CLEANUP_VECTOR) {
+		sysvec_irq_move_cleanup(regs);
+#endif
 	} else {
 		ack_APIC_irq();
 
-- 
2.34.1


  reply	other threads:[~2022-11-10  6:17 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-10  5:53 [PATCH 0/6] x86/traps,VMX: implement software based NMI/IRQ dispatch for VMX NMI/IRQ reinjection Xin Li
2022-11-10  5:53 ` Xin Li [this message]
2022-11-10  5:53 ` [PATCH 2/6] x86/traps: add a system interrupt table for system interrupt dispatch Xin Li
2022-11-10  5:53 ` [PATCH 3/6] x86/traps: add install_system_interrupt_handler() Xin Li
2022-11-10  5:53 ` [PATCH 4/6] x86/traps: add external_interrupt() to dispatch external interrupts Xin Li
2022-11-10  5:53 ` [PATCH 5/6] KVM: x86/VMX: add kvm_vmx_reinject_nmi_irq() for NMI/IRQ reinjection Xin Li
2022-11-10 15:59   ` Sean Christopherson
2022-11-10 20:40     ` Li, Xin3
2022-11-10 20:53       ` Sean Christopherson
2022-11-11  9:19         ` Peter Zijlstra
2022-11-11  9:29           ` H. Peter Anvin
2022-11-11 10:45             ` Peter Zijlstra
2022-11-11 11:57               ` Paolo Bonzini
2022-11-11 12:10                 ` Peter Zijlstra
2022-11-11 12:17                   ` Paolo Bonzini
2022-11-14  4:10                 ` Li, Xin3
2022-11-14  2:18         ` Li, Xin3
2022-11-10  5:53 ` [PATCH 6/6] x86/traps: remove unused NMI entry exc_nmi_noist() Xin Li

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