Whene we raise a synchronous exception, if HCR_EL2.TGE is set then
exceptions targeting NS EL1 must be redirected to EL2. Implement
this in raise_exception() -- all synchronous exceptions go through
this function.
(Asynchronous exceptions go via arm_cpu_exec_interrupt(), which
already honours HCR_EL2.TGE when it determines the target EL
in arm_phys_excp_target_el().)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id:
20180724115950.17316-4-peter.maydell@linaro.org
{
CPUState *cs = CPU(arm_env_get_cpu(env));
+ if ((env->cp15.hcr_el2 & HCR_TGE) &&
+ target_el == 1 && !arm_is_secure(env)) {
+ /*
+ * Redirect NS EL1 exceptions to NS EL2. These are reported with
+ * their original syndrome register value, with the exception of
+ * SIMD/FP access traps, which are reported as uncategorized
+ * (see DDI0478C.a D1.10.4)
+ */
+ target_el = 2;
+ if (syndrome >> ARM_EL_EC_SHIFT == EC_ADVSIMDFPACCESSTRAP) {
+ syndrome = syn_uncategorized();
+ }
+ }
+
assert(!excp_is_internal(excp));
cs->exception_index = excp;
env->exception.syndrome = syndrome;