[Xen-changelog] [xen staging] Revert "x86/vvmx: fix virtual interrupt injection when Ack on exit control is used"

[patchbot@xxxxxxx]

commit 8b3721c542303d380bdab45c95508d9f9a77593c
Author:     Roger Pau Monné <roger.pau@xxxxxxxxxx>
AuthorDate: Thu Mar 26 12:25:07 2020 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Mar 26 12:25:07 2020 +0100

    Revert "x86/vvmx: fix virtual interrupt injection when Ack on exit control 
is used"
    
    This reverts commit f96e1469ad06b61796c60193daaeb9f8a96d7458.
    
    The commit is wrong, as the whole point of nvmx_update_apicv is to
    update the guest interrupt status field when the Ack on exit VMEXIT
    control feature is enabled.
    
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vvmx.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vvmx.c b/xen/arch/x86/hvm/vmx/vvmx.c
index f049920196..1b8461ba30 100644
--- a/xen/arch/x86/hvm/vmx/vvmx.c
+++ b/xen/arch/x86/hvm/vmx/vvmx.c
@@ -1456,12 +1456,7 @@ static void virtual_vmexit(struct cpu_user_regs *regs)
     /* updating host cr0 to sync TS bit */
     __vmwrite(HOST_CR0, v->arch.hvm.vmx.host_cr0);
 
-    if ( cpu_has_vmx_virtual_intr_delivery &&
-         /*
-          * Only inject the vector if the Ack on exit bit is not set, else the
-          * interrupt will be signaled in the vmcs VM_EXIT_INTR_INFO field.
-          */
-         !(get_vvmcs(v, VM_EXIT_CONTROLS) & VM_EXIT_ACK_INTR_ON_EXIT) )
+    if ( cpu_has_vmx_virtual_intr_delivery )
         nvmx_update_apicv(v);
 
     nvcpu->nv_vmswitch_in_progress = 0;
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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