[Xen-devel] [PATCH v1] x86/pvh: disable posted interrupts

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

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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