Differential D36610 Diff 110757 sys/x86/xen/xen_arch_intr.c

Changeset View

Standalone View

sys/x86/xen/xen_arch_intr.c

Show First 20 Lines • Show All 50 Lines • ▼ Show 20 Lines

#include <x86/apicvar.h>		#include <x86/apicvar.h>

/********************** Xen x86 interrupt interface **********************/		/********************** Xen x86 interrupt interface **********************/

/*		/*
* Pointers to the interrupt counters		* Pointers to the interrupt counters
*/		*/
DPCPU_DEFINE_STATIC(u_long *, pintrcnt);		DPCPU_DEFINE_STATIC(struct intr_event *, counters);

/**		/**
* Allocate and register a per-cpu Xen upcall interrupt counter.		* Allocate and register a per-cpu Xen upcall interrupt counter.
*		*
* \param cpu The cpu for which to register this interrupt count.		* \param cpu The cpu for which to register this interrupt count.
*/		*/
static void		static void
xen_intr_intrcnt_add(const u_int cpu)		xen_intr_intrcnt_add(const u_int cpu)
{		{
char buf[MAXCOMLEN + 1];		struct intr_event **ppevent;
u_long **ppintrcnt;

ppintrcnt = DPCPU_ID_PTR(cpu, pintrcnt);		ppevent = DPCPU_ID_PTR(cpu, counters);
if (ppintrcnt != NULL)		if (ppevent != NULL)
return;		return;

snprintf(buf, sizeof(buf), "cpu%d:xen", cpu);		INTRCNT_ADD(ppevent, "cpu%d:xen", cpu);
intrcnt_add(buf, ppintrcnt);
}		}

static void		static void
xen_intrcnt_init(void *dummy __unused)		xen_intrcnt_init(void *dummy __unused)
{		{
unsigned int i;		unsigned int i;

if (!xen_domain())		if (!xen_domain())
Show All 19 Lines	xen_arch_intr_handle_upcall(struct trapframe *trap_frame)
struct trapframe *old;		struct trapframe *old;

/*		/*
* Disable preemption in order to always check and fire events		* Disable preemption in order to always check and fire events
* on the right vCPU		* on the right vCPU
*/		*/
critical_enter();		critical_enter();

++*DPCPU_GET(pintrcnt);		++DPCPU_GET(counters)->ie_intrcnt;

old = curthread->td_intr_frame;		old = curthread->td_intr_frame;
curthread->td_intr_frame = trap_frame;		curthread->td_intr_frame = trap_frame;

xen_intr_handle_upcall(NULL);		xen_intr_handle_upcall(NULL);

curthread->td_intr_frame = old;		curthread->td_intr_frame = old;

▲ Show 20 Lines • Show All 268 Lines • Show Last 20 Lines