[xen master] x86/vPMU: move APIC ack past the handling of the interrupt

[patchbot@xxxxxxx]

commit f4a4287dbbcf0e3d80bb706c09da3e6d48f55234
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Tue Nov 25 10:24:38 2025 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Nov 25 10:24:38 2025 +0100

    x86/vPMU: move APIC ack past the handling of the interrupt
    
    While benign as long as it's using a direct-APIC-vector (handlers for
    which are called with IRQs off), follow the more usual pattern of ack-ing
    the IRQ only after handling it.
    
    Requested-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/apic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/apic.c b/xen/arch/x86/apic.c
index 7747718600..fb38be7ec3 100644
--- a/xen/arch/x86/apic.c
+++ b/xen/arch/x86/apic.c
@@ -1319,8 +1319,8 @@ static void cf_check error_interrupt(void)
 
 static void cf_check pmu_interrupt(void)
 {
-    ack_APIC_irq();
     vpmu_do_interrupt();
+    ack_APIC_irq();
 }
 
 void __init apic_intr_init(void)
--
generated by git-patchbot for /home/xen/git/xen.git#master