[Xen-changelog] [xen master] Nested VMX: Check whether interrupt is blocked by TPR

[patchbot@xxxxxxx]

commit 7fb5c6b9ef22915e3fcac95cd44857f4457ba783
Author:     Yang Zhang <yang.z.zhang@xxxxxxxxx>
AuthorDate: Thu Aug 22 10:49:24 2013 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Aug 22 10:49:24 2013 +0200

    Nested VMX: Check whether interrupt is blocked by TPR
    
    If interrupt is blocked by L1's TPR, L2 should not see it and keep
    running. Adding the check before L2 to retrive interrupt.
    
    Signed-off-by: Yang Zhang <yang.z.zhang@xxxxxxxxx>
    Acked-by: "Dong, Eddie" <eddie.dong@xxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/intr.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/intr.c b/xen/arch/x86/hvm/vmx/intr.c
index e376f3c..cab9109 100644
--- a/xen/arch/x86/hvm/vmx/intr.c
+++ b/xen/arch/x86/hvm/vmx/intr.c
@@ -165,6 +165,11 @@ static int nvmx_intr_intercept(struct vcpu *v, struct 
hvm_intack intack)
 {
     u32 ctrl;
 
+    /* If blocked by L1's tpr, then nothing to do. */
+    if ( nestedhvm_vcpu_in_guestmode(v) &&
+         hvm_interrupt_blocked(v, intack) == hvm_intblk_tpr )
+        return 1;
+
     if ( nvmx_intr_blocked(v) != hvm_intblk_none )
     {
         enable_intr_window(v, intack);
--
generated by git-patchbot for /home/xen/git/xen.git#master

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