diff options
| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-03-17 16:37:18 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-24 23:57:32 +0200 |
| commit | ee523ca1e456d754d66be6deab910131e4e1dbf8 (patch) | |
| tree | 346c3bf4f701a07b124af72a3da4577b2e5dcb3b /arch/x86/xen/smp.c | |
| parent | e2a81baf6604a2e08e10c7405b0349106f77c8af (diff) | |
xen: implement a debug-interrupt handler
Xen supports the notion of a debug interrupt which can be triggered
from the console. For now this is implemented to show pending events,
masks and each CPU's pending event set.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/xen/smp.c')
| -rw-r--r-- | arch/x86/xen/smp.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c index d61e4f8b07c7..92dd3dbf3ffb 100644 --- a/arch/x86/xen/smp.c +++ b/arch/x86/xen/smp.c @@ -36,8 +36,9 @@ #include "mmu.h" static cpumask_t xen_cpu_initialized_map; -static DEFINE_PER_CPU(int, resched_irq); -static DEFINE_PER_CPU(int, callfunc_irq); +static DEFINE_PER_CPU(int, resched_irq) = -1; +static DEFINE_PER_CPU(int, callfunc_irq) = -1; +static DEFINE_PER_CPU(int, debug_irq) = -1; /* * Structure and data for smp_call_function(). This is designed to minimise @@ -89,9 +90,7 @@ static __cpuinit void cpu_bringup_and_idle(void) static int xen_smp_intr_init(unsigned int cpu) { int rc; - const char *resched_name, *callfunc_name; - - per_cpu(resched_irq, cpu) = per_cpu(callfunc_irq, cpu) = -1; + const char *resched_name, *callfunc_name, *debug_name; resched_name = kasprintf(GFP_KERNEL, "resched%d", cpu); rc = bind_ipi_to_irqhandler(XEN_RESCHEDULE_VECTOR, @@ -115,6 +114,14 @@ static int xen_smp_intr_init(unsigned int cpu) goto fail; per_cpu(callfunc_irq, cpu) = rc; + debug_name = kasprintf(GFP_KERNEL, "debug%d", cpu); + rc = bind_virq_to_irqhandler(VIRQ_DEBUG, cpu, xen_debug_interrupt, + IRQF_DISABLED | IRQF_PERCPU | IRQF_NOBALANCING, + debug_name, NULL); + if (rc < 0) + goto fail; + per_cpu(debug_irq, cpu) = rc; + return 0; fail: @@ -122,6 +129,8 @@ static int xen_smp_intr_init(unsigned int cpu) unbind_from_irqhandler(per_cpu(resched_irq, cpu), NULL); if (per_cpu(callfunc_irq, cpu) >= 0) unbind_from_irqhandler(per_cpu(callfunc_irq, cpu), NULL); + if (per_cpu(debug_irq, cpu) >= 0) + unbind_from_irqhandler(per_cpu(debug_irq, cpu), NULL); return rc; } |