target/xtensa: fix ps.ring use in MPU configs

Allow ps.ring modification by wsr.ps/xsr.ps and use ps.ring value in
xtensa_get_[c]ring on configurations with MPU.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

target/xtensa/cpu.h

@@ -645,7 +645,9 @@ static inline int xtensa_get_cintlevel(const CPUXtensaState *env)
 
 static inline int xtensa_get_ring(const CPUXtensaState *env)
 {
-    if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
+    if (xtensa_option_bits_enabled(env->config,
+                                   XTENSA_OPTION_BIT(XTENSA_OPTION_MMU) |
+                                   XTENSA_OPTION_BIT(XTENSA_OPTION_MPU))) {
         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
     } else {
         return 0;
@@ -654,8 +656,10 @@ static inline int xtensa_get_ring(const CPUXtensaState *env)
 
 static inline int xtensa_get_cring(const CPUXtensaState *env)
 {
-    if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU) &&
-            (env->sregs[PS] & PS_EXCM) == 0) {
+    if (xtensa_option_bits_enabled(env->config,
+                                   XTENSA_OPTION_BIT(XTENSA_OPTION_MMU) |
+                                   XTENSA_OPTION_BIT(XTENSA_OPTION_MPU)) &&
+        (env->sregs[PS] & PS_EXCM) == 0) {
         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
     } else {
         return 0;

target/xtensa/translate.c

@@ -2713,7 +2713,8 @@ static void translate_wsr_ps(DisasContext *dc, const OpcodeArg arg[],
     uint32_t mask = PS_WOE | PS_CALLINC | PS_OWB |
         PS_UM | PS_EXCM | PS_INTLEVEL;
 
-    if (option_enabled(dc, XTENSA_OPTION_MMU)) {
+    if (option_enabled(dc, XTENSA_OPTION_MMU) ||
+        option_enabled(dc, XTENSA_OPTION_MPU)) {
         mask |= PS_RING;
     }
     tcg_gen_andi_i32(cpu_SR[par[0]], arg[0].in, mask);