[PATCH v1] xen/riscv: route unhandled interrupts to do_unexpected_trap()

[Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>]

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>
---
 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 84b5ab4142f6..34920f4e5693 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);
-- 
2.52.0