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Commit f6b3c72c authored by Feng Wu's avatar Feng Wu Committed by Thomas Gleixner
Browse files

x86/irq: Define a global vector for VT-d Posted-Interrupts 



Currently, we use a global vector as the Posted-Interrupts
Notification Event for all the vCPUs in the system. We need
to introduce another global vector for VT-d Posted-Interrtups,
which will be used to wakeup the sleep vCPU when an external
interrupt from a direct-assigned device happens for that vCPU.

[ tglx: Removed a gazillion of extra newlines ]

Signed-off-by: default avatarFeng Wu <feng.wu@intel.com>
Cc: jiang.liu@linux.intel.com
Link: http://lkml.kernel.org/r/1432026437-16560-4-git-send-email-feng.wu@intel.com


Suggested-by: default avatarYang Zhang <yang.z.zhang@intel.com>
Acked-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent a2f1c8bd

arch/x86/include/asm/entry_arch.h

+2 −0
Original line number Diff line number Diff line
@@ -23,6 +23,8 @@ BUILD_INTERRUPT(x86_platform_ipi, X86_PLATFORM_IPI_VECTOR) 
#ifdef CONFIG_HAVE_KVM

BUILD_INTERRUPT3(kvm_posted_intr_ipi, POSTED_INTR_VECTOR,

		 smp_kvm_posted_intr_ipi)

BUILD_INTERRUPT3(kvm_posted_intr_wakeup_ipi, POSTED_INTR_WAKEUP_VECTOR,

		 smp_kvm_posted_intr_wakeup_ipi)

#endif



/*

arch/x86/include/asm/hardirq.h

+1 −0
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ typedef struct { 
#endif

#ifdef CONFIG_HAVE_KVM

	unsigned int kvm_posted_intr_ipis;

	unsigned int kvm_posted_intr_wakeup_ipis;

#endif

	unsigned int x86_platform_ipis;	/* arch dependent */

	unsigned int apic_perf_irqs;

arch/x86/include/asm/hw_irq.h

+2 −0
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ 
extern asmlinkage void apic_timer_interrupt(void);

extern asmlinkage void x86_platform_ipi(void);

extern asmlinkage void kvm_posted_intr_ipi(void);

extern asmlinkage void kvm_posted_intr_wakeup_ipi(void);

extern asmlinkage void error_interrupt(void);

extern asmlinkage void irq_work_interrupt(void);
@@ -58,6 +59,7 @@ extern void trace_call_function_single_interrupt(void); 
#define trace_irq_move_cleanup_interrupt  irq_move_cleanup_interrupt

#define trace_reboot_interrupt  reboot_interrupt

#define trace_kvm_posted_intr_ipi kvm_posted_intr_ipi

#define trace_kvm_posted_intr_wakeup_ipi kvm_posted_intr_wakeup_ipi

#endif /* CONFIG_TRACING */



#ifdef	CONFIG_X86_LOCAL_APIC

arch/x86/include/asm/irq.h

+4 −0
Original line number Diff line number Diff line
@@ -30,6 +30,10 @@ extern void fixup_irqs(void); 
extern void irq_force_complete_move(int);

#endif



#ifdef CONFIG_HAVE_KVM

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

#endif



extern void (*x86_platform_ipi_callback)(void);

extern void native_init_IRQ(void);

extern bool handle_irq(unsigned irq, struct pt_regs *regs);

arch/x86/include/asm/irq_vectors.h

+1 −0
Original line number Diff line number Diff line
@@ -86,6 +86,7 @@ 
/* Vector for KVM to deliver posted interrupt IPI */

#ifdef CONFIG_HAVE_KVM

#define POSTED_INTR_VECTOR		0xf2

#define POSTED_INTR_WAKEUP_VECTOR	0xf1

#endif



/*