diff mbox series

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

Message ID 20221110061545.1531-2-xin3.li@intel.com
State New
Headers
Series x86/traps,VMX: implement software based NMI/IRQ dispatch for VMX NMI/IRQ reinjection |

Commit Message

Li, Xin3 Nov. 10, 2022, 6:15 a.m. UTC 
  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(+)

Comments

Ashok Raj Nov. 10, 2022, 6:59 p.m. UTC | #1 
On Wed, Nov 09, 2022 at 10:15:40PM -0800, Xin Li wrote:
> 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.

nit: 
s/spurios/spurious


> 
> 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
>
Li, Xin3 Nov. 10, 2022, 10:09 p.m. UTC | #2 
> > 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.
> 
> nit:
> s/spurios/spurious

Thank you!
diff mbox series

Patch

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();