x86/pvh: disable posted interrupts

Enabling posted interrupts requires the virtual interrupt delivery feature,
which is disabled for PVH guests, so make sure posted interrupts are also
disabled or else vmlaunch will fail.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reported-and-Tested-by: Lars Eggert <lars@netapp.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>

diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
index 877ec10eb7de0833eb4f9cbd3e8ea3c8014fd88d..3aff3656a354819d08d2b1d9a99616cc0470eca3 100644 (file)
--- a/xen/arch/x86/hvm/vmx/vmcs.c
+++ b/xen/arch/x86/hvm/vmx/vmcs.c
@@ -976,6 +976,10 @@ static int construct_vmcs(struct vcpu *v)
               | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY);
         v->arch.hvm_vmx.exec_control &= ~CPU_BASED_TPR_SHADOW;
 
+        /* In turn, disable posted interrupts. */
+        __vmwrite(PIN_BASED_VM_EXEC_CONTROL,
+                  vmx_pin_based_exec_control & ~PIN_BASED_POSTED_INTERRUPT);
+
         /* Unrestricted guest (real mode for EPT) */
         v->arch.hvm_vmx.secondary_exec_control &=
             ~SECONDARY_EXEC_UNRESTRICTED_GUEST;