Commit 9c3b1f49 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

x86/entry: Convert KVM vectors to IDTENTRY_SYSVEC* 



Convert KVM specific system vectors to IDTENTRY_SYSVEC*:

The two empty stub handlers which only increment the stats counter do no
need to run on the interrupt stack. Use IDTENTRY_SYSVEC_SIMPLE for them.

The wakeup handler does more work and runs on the interrupt stack.

None of these handlers need to save and restore the irq_regs pointer.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Acked-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Acked-by: default avatarAndy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20200521202119.555715519@linutronix.de
parent 720909a7

arch/x86/entry/entry_64.S

+0 −7
Original line number Diff line number Diff line
@@ -956,13 +956,6 @@ apicinterrupt3 \num \sym \do_sym 
POP_SECTION_IRQENTRY

.endm





#ifdef CONFIG_HAVE_KVM

apicinterrupt3 POSTED_INTR_VECTOR		kvm_posted_intr_ipi		smp_kvm_posted_intr_ipi

apicinterrupt3 POSTED_INTR_WAKEUP_VECTOR	kvm_posted_intr_wakeup_ipi	smp_kvm_posted_intr_wakeup_ipi

apicinterrupt3 POSTED_INTR_NESTED_VECTOR	kvm_posted_intr_nested_ipi	smp_kvm_posted_intr_nested_ipi

#endif



#ifdef CONFIG_SMP

apicinterrupt RESCHEDULE_VECTOR			reschedule_interrupt		smp_reschedule_interrupt

#endif

arch/x86/include/asm/entry_arch.h

+0 −7
Original line number Diff line number Diff line
@@ -13,10 +13,3 @@ 
#ifdef CONFIG_SMP

BUILD_INTERRUPT(reschedule_interrupt,RESCHEDULE_VECTOR)

#endif
 


#ifdef CONFIG_HAVE_KVM

BUILD_INTERRUPT(kvm_posted_intr_ipi, POSTED_INTR_VECTOR)

BUILD_INTERRUPT(kvm_posted_intr_wakeup_ipi, POSTED_INTR_WAKEUP_VECTOR)

BUILD_INTERRUPT(kvm_posted_intr_nested_ipi, POSTED_INTR_NESTED_VECTOR)

#endif

arch/x86/include/asm/hw_irq.h

+0 −4
Original line number Diff line number Diff line
@@ -29,10 +29,6 @@ 
#include <asm/sections.h>



/* Interrupt handlers registered during init_IRQ */

extern asmlinkage void kvm_posted_intr_ipi(void);

extern asmlinkage void kvm_posted_intr_wakeup_ipi(void);

extern asmlinkage void kvm_posted_intr_nested_ipi(void);



extern asmlinkage void reschedule_interrupt(void);



#ifdef	CONFIG_X86_LOCAL_APIC

arch/x86/include/asm/idtentry.h

+6 −0
Original line number Diff line number Diff line
@@ -628,6 +628,12 @@ DECLARE_IDTENTRY_SYSVEC(IRQ_WORK_VECTOR, sysvec_irq_work); 
# endif

#endif



#ifdef CONFIG_HAVE_KVM

DECLARE_IDTENTRY_SYSVEC(POSTED_INTR_VECTOR,		sysvec_kvm_posted_intr_ipi);

DECLARE_IDTENTRY_SYSVEC(POSTED_INTR_WAKEUP_VECTOR,	sysvec_kvm_posted_intr_wakeup_ipi);

DECLARE_IDTENTRY_SYSVEC(POSTED_INTR_NESTED_VECTOR,	sysvec_kvm_posted_intr_nested_ipi);

#endif



#undef X86_TRAP_OTHER



#endif

arch/x86/include/asm/irq.h

+0 −3
Original line number Diff line number Diff line
@@ -26,9 +26,6 @@ extern void fixup_irqs(void); 


#ifdef CONFIG_HAVE_KVM

extern void kvm_set_posted_intr_wakeup_handler(void (*handler)(void));

extern __visible void smp_kvm_posted_intr_ipi(struct pt_regs *regs);

extern __visible void smp_kvm_posted_intr_wakeup_ipi(struct pt_regs *regs);

extern __visible void smp_kvm_posted_intr_nested_ipi(struct pt_regs *regs);

#endif



extern void (*x86_platform_ipi_callback)(void);

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