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path: root/drivers/xen/events.c
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Diffstat (limited to 'drivers/xen/events.c')
-rw-r--r--drivers/xen/events.c30
1 files changed, 24 insertions, 6 deletions
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 5e8be462aed5..4035e833ea26 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -56,6 +56,7 @@
#include <xen/interface/hvm/params.h>
#include <xen/interface/physdev.h>
#include <xen/interface/sched.h>
+#include <xen/interface/vcpu.h>
#include <asm/hw_irq.h>
/*
@@ -1212,7 +1213,17 @@ EXPORT_SYMBOL_GPL(evtchn_put);
void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector)
{
- int irq = per_cpu(ipi_to_irq, cpu)[vector];
+ int irq;
+
+#ifdef CONFIG_X86
+ if (unlikely(vector == XEN_NMI_VECTOR)) {
+ int rc = HYPERVISOR_vcpu_op(VCPUOP_send_nmi, cpu, NULL);
+ if (rc < 0)
+ printk(KERN_WARNING "Sending nmi to CPU%d failed (rc:%d)\n", cpu, rc);
+ return;
+ }
+#endif
+ irq = per_cpu(ipi_to_irq, cpu)[vector];
BUG_ON(irq < 0);
notify_remote_via_irq(irq);
}
@@ -1379,14 +1390,21 @@ static void __xen_evtchn_do_upcall(void)
pending_bits = active_evtchns(cpu, s, word_idx);
bit_idx = 0; /* usually scan entire word from start */
+ /*
+ * We scan the starting word in two parts.
+ *
+ * 1st time: start in the middle, scanning the
+ * upper bits.
+ *
+ * 2nd time: scan the whole word (not just the
+ * parts skipped in the first pass) -- if an
+ * event in the previously scanned bits is
+ * pending again it would just be scanned on
+ * the next loop anyway.
+ */
if (word_idx == start_word_idx) {
- /* We scan the starting word in two parts */
if (i == 0)
- /* 1st time: start in the middle */
bit_idx = start_bit_idx;
- else
- /* 2nd time: mask bits done already */
- bit_idx &= (1UL << start_bit_idx) - 1;
}
do {