[Qemu-devel] [PATCH v6 05/10] target-arm: Don't take interrupts targeting lower ELs

["Edgar E. Iglesias" <edgar.iglesias@gmail.com>]

From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
 target-arm/cpu.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index a5e8e0d..7f8a410 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -1174,6 +1174,13 @@ bool write_cpustate_to_list(ARMCPU *cpu);
 static inline bool arm_excp_unmasked(CPUState *cs, unsigned int excp_idx)
 {
     CPUARMState *env = cs->env_ptr;
+    unsigned int cur_el = arm_current_pl(env);
+    unsigned int target_el = arm_excp_target_el(cs, excp_idx);
+
+    /* Don't take exceptions if they target a lower EL.  */
+    if (cur_el > target_el) {
+        return false;
+    }
 
     switch (excp_idx) {
     case EXCP_FIQ:
-- 
1.9.1