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target-arm: Extend helpers to route exceptions

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Updated the various helper routines to set the target EL as needed using a
dedicated function.

Backports commit e3b1d480995f6e2e86ef062038e618c1234dbcf1 from qemu
This commit is contained in:
Greg Bellows 2018-02-12 22:19:11 -05:00 committed by Lioncash
parent edd8066082
commit 6b2502ac4f
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 21 additions and 0 deletions
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21
qemu/target-arm/op_helper.c
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@ -33,6 +33,20 @@ static void raise_exception(CPUARMState *env, int tt)
cpu_loop_exit(cs);
}
static int exception_target_el(CPUARMState *env)
{
int target_el = MAX(1, arm_current_el(env));
/* No such thing as secure EL1 if EL3 is aarch32, so update the target EL
* to EL3 in this case.
*/
if (arm_is_secure(env) && !arm_el_is_aa64(env, 3) && target_el == 1) {
target_el = 3;
}
return target_el;
}
uint32_t HELPER(neon_tbl)(CPUARMState *env, uint32_t ireg, uint32_t def,
uint32_t rn, uint32_t maxindex)
{
@ -306,6 +320,7 @@ void HELPER(access_check_cp_reg)(CPUARMState *env, void *rip, uint32_t syndrome)
if (arm_feature(env, ARM_FEATURE_XSCALE) && ri->cp < 14
&& extract32(env->cp15.c15_cpar, ri->cp, 1) == 0) {
env->exception.syndrome = syndrome;
env->exception.target_el = exception_target_el(env);
raise_exception(env, EXCP_UDEF);
}
@ -318,9 +333,11 @@ void HELPER(access_check_cp_reg)(CPUARMState *env, void *rip, uint32_t syndrome)
return;
case CP_ACCESS_TRAP:
env->exception.syndrome = syndrome;
env->exception.target_el = exception_target_el(env);
break;
case CP_ACCESS_TRAP_UNCATEGORIZED:
env->exception.syndrome = syn_uncategorized();
env->exception.target_el = exception_target_el(env);
break;
default:
g_assert_not_reached();
@ -363,6 +380,7 @@ void HELPER(msr_i_pstate)(CPUARMState *env, uint32_t op, uint32_t imm)
* to catch that case at translate time.
*/
if (arm_current_el(env) == 0 && !(env->cp15.sctlr_el[1] & SCTLR_UMA)) {
env->exception.target_el = exception_target_el(env);
raise_exception(env, EXCP_UDEF);
}
@ -422,6 +440,7 @@ void HELPER(pre_hvc)(CPUARMState *env)
if (undef) {
env->exception.syndrome = syn_uncategorized();
env->exception.target_el = exception_target_el(env);
raise_exception(env, EXCP_UDEF);
}
}
@ -452,11 +471,13 @@ void HELPER(pre_smc)(CPUARMState *env, uint32_t syndrome)
} else if (!secure && cur_el == 1 && (env->cp15.hcr_el2 & HCR_TSC)) {
/* In NS EL1, HCR controlled routing to EL2 has priority over SMD. */
env->exception.syndrome = syndrome;
env->exception.target_el = 2;
raise_exception(env, EXCP_HYP_TRAP);
}
if (undef) {
env->exception.syndrome = syn_uncategorized();
env->exception.target_el = exception_target_el(env);
raise_exception(env, EXCP_UDEF);
}
}