target/arm: Enable FEAT_MOPS insns in user-mode emulation

In user-mode emulation, we need to set the SCTLR_EL1.MSCEn
bit to avoid all the FEAT_MOPS insns UNDEFing.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20231030174000.3792225-2-peter.maydell@linaro.org

target/arm/cpu.c

@@ -296,6 +296,8 @@ static void arm_cpu_reset_hold(Object *obj)
         env->cp15.sctlr_el[1] |= SCTLR_TSCXT;
         /* Disable access to Debug Communication Channel (DCC). */
         env->cp15.mdscr_el1 |= 1 << 12;
+        /* Enable FEAT_MOPS */
+        env->cp15.sctlr_el[1] |= SCTLR_MSCEN;
 #else
         /* Reset into the highest available EL */
         if (arm_feature(env, ARM_FEATURE_EL3)) {