File 5215d094-Nested-VMX-Check-whether-interrupt-is-blocked-by-TPR.patch of Package xen

# Commit 7fb5c6b9ef22915e3fcac95cd44857f4457ba783
# Date 2013-08-22 10:49:24 +0200
# Author Yang Zhang <yang.z.zhang@Intel.com>
# Committer Jan Beulich <jbeulich@suse.com>
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@Intel.com>
Acked-by: "Dong, Eddie" <eddie.dong@intel.com>

--- 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 vc
 {
     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);