diff options
Diffstat (limited to 'target/arm/tcg/helper-a64.c')
-rw-r--r-- | target/arm/tcg/helper-a64.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/target/arm/tcg/helper-a64.c b/target/arm/tcg/helper-a64.c index 1c9370f07b..0cf56f6dc4 100644 --- a/target/arm/tcg/helper-a64.c +++ b/target/arm/tcg/helper-a64.c @@ -780,6 +780,15 @@ void HELPER(exception_return)(CPUARMState *env, uint64_t new_pc) spsr &= ~PSTATE_SS; } + /* + * FEAT_RME forbids return from EL3 with an invalid security state. + * We don't need an explicit check for FEAT_RME here because we enforce + * in scr_write() that you can't set the NSE bit without it. + */ + if (cur_el == 3 && (env->cp15.scr_el3 & (SCR_NS | SCR_NSE)) == SCR_NSE) { + goto illegal_return; + } + new_el = el_from_spsr(spsr); if (new_el == -1) { goto illegal_return; |