[PATCH 1/6] x86/traps: let common_interrupt() handle IRQ_MOVE_CLEANUP_VECTOR

Xin Li
2022-11-10T06:17:22Z

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