x86 hvm: hvm_set_callback_irq_level() must not be called in IRQ

context or with IRQs disabled. Ensure this by deferring to tasklet
(softirq) context if required.

Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/xen/include/asm-x86/hvm/vcpu.h b/xen/include/asm-x86/hvm/vcpu.h
index faea392f92..cd24177232 100644
--- a/xen/include/asm-x86/hvm/vcpu.h
+++ b/xen/include/asm-x86/hvm/vcpu.h
@@ -66,6 +66,8 @@ struct hvm_vcpu {
         struct arch_svm_struct svm;
     } u;
 
+    struct tasklet      assert_evtchn_irq_tasklet;
+
     struct mtrr_state   mtrr;
     u64                 pat_cr;