[Xen-changelog] Check to ensure no interrupts to deliver before allowing

[BitKeeper Bot <riel@xxxxxxxxxxx>]

ChangeSet 1.1713.2.6, 2005/06/17 11:17:45-06:00, djm@xxxxxxxxxxxxxxx

        Check to ensure no interrupts to deliver before allowing
        a guest to "pause" itself



 hypercall.c |   11 +++++++++++
 1 files changed, 11 insertions(+)


diff -Nru a/xen/arch/ia64/hypercall.c b/xen/arch/ia64/hypercall.c
--- a/xen/arch/ia64/hypercall.c 2005-06-23 07:03:19 -04:00
+++ b/xen/arch/ia64/hypercall.c 2005-06-23 07:03:19 -04:00
@@ -40,6 +40,17 @@
 #endif
                x = pal_emulator_static(regs->r28);
                if (regs->r28 == PAL_HALT_LIGHT) {
+#if 1
+#define SPURIOUS_VECTOR 15
+                       if (vcpu_check_pending_interrupts(v)!=SPURIOUS_VECTOR) {
+//printf("Domain trying to go idle when interrupt pending!\n");
+//this shouldn't happen, but it apparently does quite a bit!  so don't
+//allow it to happen... i.e. if a domain has an interrupt pending and
+//it tries to halt itself because it thinks it is idle, just return here
+//as deliver_pending_interrupt is called on the way out and will deliver it
+                       }
+                       else
+#endif
                        do_sched_op(SCHEDOP_yield);
                        //break;
                }

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