target-arm: Make arm_current_el() return sensible values for M profile
Although M profile doesn't have the same concept of exception level
as A profile, it does have a notion of privileged versus not, which
we currently track in the privmode TB flag. Support returning this
information if arm_current_el() is called on an M profile core, so
that we can identify the correct MMU index to use (and put the MMU
index in the TB flags) without having to special-case M profile.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Greg Bellows <greg.bellows@linaro.org>
diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index 97f0c13..d6e0d4d 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -1218,6 +1218,10 @@
*/
static inline int arm_current_el(CPUARMState *env)
{
+ if (arm_feature(env, ARM_FEATURE_M)) {
+ return !((env->v7m.exception == 0) && (env->v7m.control & 1));
+ }
+
if (is_a64(env)) {
return extract32(env->pstate, 2, 2);
}
