On 25/03/15 12:31, Feng Wu wrote:
Currently, we don't support urgent interrupt, all interrupts
are recognized as non-urgent interrupt, so we cannot send
posted-interrupt when 'SN' is set.
Signed-off-by: Feng Wu <feng...@intel.com>
---
xen/arch/x86/hvm/vmx/vmx.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index 6323bd6..40c7b0e 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -1663,9 +1663,20 @@ static void __vmx_deliver_posted_interrupt(struct vcpu
*v)
static void vmx_deliver_posted_intr(struct vcpu *v, u8 vector)
{
+ int r, sn;
+
if ( pi_test_and_set_pir(vector, &v->arch.hvm_vmx.pi_desc) )
return;
+ /*
+ * Currently, we don't support urgent interrupt, all interrupts
+ * are recognized as non-urgent interrupt, so we cannot send
+ * posted-interrupt when 'SN' is set.
+ */
+
+ sn = pi_test_sn(&v->arch.hvm_vmx.pi_desc);
Is there anywhere which sets sn at all? I cant spot anywhere.
~Andrew
+ r = pi_test_and_set_on(&v->arch.hvm_vmx.pi_desc);
+
if ( unlikely(v->arch.hvm_vmx.eoi_exitmap_changed) )
{
/*
@@ -1675,7 +1686,7 @@ static void vmx_deliver_posted_intr(struct vcpu *v, u8
vector)
*/
pi_set_on(&v->arch.hvm_vmx.pi_desc);
}
- else if ( !pi_test_and_set_on(&v->arch.hvm_vmx.pi_desc) )
+ else if ( !r && !sn )
{
__vmx_deliver_posted_interrupt(v);
return;
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