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[Xen-devel] [PATCH v1] 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 Monnà <roger.pau@xxxxxxxxxx>
Reported-and-Tested-by: Lars Eggert <lars@xxxxxxxxxx>
Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Cc: Jun Nakajima <jun.nakajima@xxxxxxxxx>
Cc: Eddie Dong <eddie.dong@xxxxxxxxx>
Cc: Kevin Tian <kevin.tian@xxxxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vmcs.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
index a714549..9827a8e 100644
--- a/xen/arch/x86/hvm/vmx/vmcs.c
+++ b/xen/arch/x86/hvm/vmx/vmcs.c
@@ -980,6 +980,10 @@ static int construct_vmcs(struct vcpu *v)
         v->arch.hvm_vmx.secondary_exec_control &=
             ~SECONDARY_EXEC_UNRESTRICTED_GUEST;
 
+        /* Disable posted interrupts */
+        __vmwrite(PIN_BASED_VM_EXEC_CONTROL,
+            vmx_pin_based_exec_control & ~PIN_BASED_POSTED_INTERRUPT);
+
         /* Start in 64-bit mode. PVH 32bitfixme. */
         vmentry_ctl |= VM_ENTRY_IA32E_MODE;       /* GUEST_EFER.LME/LMA 
ignored */
 
-- 
1.9.5 (Apple Git-50.3)


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