[xen staging] xen/riscv: route unhandled interrupts to do_unexpected_trap()

[patchbot@xxxxxxx]

commit d0f94a0d400c8b2d37d037606f9fc5878757ce2e
Author:     Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
AuthorDate: Mon Feb 2 09:09:26 2026 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Feb 2 10:20:54 2026 +0100

    xen/riscv: route unhandled interrupts to do_unexpected_trap()
    
    Currently, an interrupt cause which is not explicitly handled is silently
    ignored, and execution resumes without reporting the fault. This is
    incorrect and do_unexpected_trap() should be called in the case of
    unhandled interrupt.
    
    Fixes: a8b85fabf6090 ("xen/riscv: add external interrupt handling for 
hypervisor mode")
    Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/riscv/traps.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/xen/arch/riscv/traps.c b/xen/arch/riscv/traps.c
index 84b5ab4142..34920f4e56 100644
--- a/xen/arch/riscv/traps.c
+++ b/xen/arch/riscv/traps.c
@@ -196,6 +196,7 @@ void do_trap(struct cpu_user_regs *cpu_regs)
         {
             /* Handle interrupt */
             unsigned long icause = cause & ~CAUSE_IRQ_FLAG;
+            bool intr_handled = true;
 
             switch ( icause )
             {
@@ -204,10 +205,12 @@ void do_trap(struct cpu_user_regs *cpu_regs)
                 break;
 
             default:
+                intr_handled = false;
                 break;
             }
 
-            break;
+            if ( intr_handled )
+                break;
         }
 
         do_unexpected_trap(cpu_regs);
--
generated by git-patchbot for /home/xen/git/xen.git#staging