Merge remote-tracking branch 'remotes/huth-gitlab/tags/pull-request-2020-12-18' into staging

* Compile QEMU with -Wimplicit-fallthrough=2 to avoid bugs in
  switch-case statements

# gpg: Signature made Fri 18 Dec 2020 08:19:04 GMT
# gpg:                using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg:                issuer "thuth@redhat.com"
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg:                 aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg:                 aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg:                 aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3  EAB9 2ED9 D774 FE70 2DB5

* remotes/huth-gitlab/tags/pull-request-2020-12-18:
  configure: Compile with -Wimplicit-fallthrough=2
  hw/rtc/twl92230: Add missing 'break'
  bsd-user: Silence warnings about missing fallthrough statement
  tests/fp: Do not emit implicit-fallthrough warnings in the softfloat tests
  tcg/optimize: Add fallthrough annotations
  target/sparc/win_helper: silence the compiler warnings
  target/sparc/translate: silence the compiler warnings
  accel/tcg/user-exec: silence the compiler warnings
  hw/intc/arm_gicv3_kvm: silence the compiler warnings
  target/i386: silence the compiler warnings in gen_shiftd_rm_T1
  hw/timer/renesas_tmr: silence the compiler warnings
  hw/rtc/twl92230: Silence warnings about missing fallthrough statements
  target/unicore32/translate: Add missing fallthrough annotations
  disas/libvixl: Fix fall-through annotation for GCC >= 7

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

3 files changed, 23 insertions, 30 deletions

diff --git a/hw/intc/arm_gicv3_kvm.c b/hw/intc/arm_gicv3_kvm.c
index 187eb054e0..d040a5d1e9 100644
--- a/hw/intc/arm_gicv3_kvm.c
+++ b/hw/intc/arm_gicv3_kvm.c
@@ -478,9 +478,11 @@ static void kvm_arm_gicv3_put(GICv3State *s)
             kvm_gicc_access(s, ICC_AP0R_EL1(3), ncpu, &reg64, true);
             reg64 = c->icc_apr[GICV3_G0][2];
             kvm_gicc_access(s, ICC_AP0R_EL1(2), ncpu, &reg64, true);
+            /* fall through */
         case 6:
             reg64 = c->icc_apr[GICV3_G0][1];
             kvm_gicc_access(s, ICC_AP0R_EL1(1), ncpu, &reg64, true);
+            /* fall through */
         default:
             reg64 = c->icc_apr[GICV3_G0][0];
             kvm_gicc_access(s, ICC_AP0R_EL1(0), ncpu, &reg64, true);
@@ -492,9 +494,11 @@ static void kvm_arm_gicv3_put(GICv3State *s)
             kvm_gicc_access(s, ICC_AP1R_EL1(3), ncpu, &reg64, true);
             reg64 = c->icc_apr[GICV3_G1NS][2];
             kvm_gicc_access(s, ICC_AP1R_EL1(2), ncpu, &reg64, true);
+            /* fall through */
         case 6:
             reg64 = c->icc_apr[GICV3_G1NS][1];
             kvm_gicc_access(s, ICC_AP1R_EL1(1), ncpu, &reg64, true);
+            /* fall through */
         default:
             reg64 = c->icc_apr[GICV3_G1NS][0];
             kvm_gicc_access(s, ICC_AP1R_EL1(0), ncpu, &reg64, true);
@@ -631,9 +635,11 @@ static void kvm_arm_gicv3_get(GICv3State *s)
             c->icc_apr[GICV3_G0][3] = reg64;
             kvm_gicc_access(s, ICC_AP0R_EL1(2), ncpu, &reg64, false);
             c->icc_apr[GICV3_G0][2] = reg64;
+            /* fall through */
         case 6:
             kvm_gicc_access(s, ICC_AP0R_EL1(1), ncpu, &reg64, false);
             c->icc_apr[GICV3_G0][1] = reg64;
+            /* fall through */
         default:
             kvm_gicc_access(s, ICC_AP0R_EL1(0), ncpu, &reg64, false);
             c->icc_apr[GICV3_G0][0] = reg64;
@@ -645,9 +651,11 @@ static void kvm_arm_gicv3_get(GICv3State *s)
             c->icc_apr[GICV3_G1NS][3] = reg64;
             kvm_gicc_access(s, ICC_AP1R_EL1(2), ncpu, &reg64, false);
             c->icc_apr[GICV3_G1NS][2] = reg64;
+            /* fall through */
         case 6:
             kvm_gicc_access(s, ICC_AP1R_EL1(1), ncpu, &reg64, false);
             c->icc_apr[GICV3_G1NS][1] = reg64;
+            /* fall through */
         default:
             kvm_gicc_access(s, ICC_AP1R_EL1(0), ncpu, &reg64, false);
             c->icc_apr[GICV3_G1NS][0] = reg64;
diff --git a/hw/rtc/twl92230.c b/hw/rtc/twl92230.c
index f838913b37..006d75e174 100644
--- a/hw/rtc/twl92230.c
+++ b/hw/rtc/twl92230.c
@@ -271,37 +271,23 @@ static void menelaus_gpio_set(void *opaque, int line, int level)
 static uint8_t menelaus_read(void *opaque, uint8_t addr)
 {
     MenelausState *s = (MenelausState *) opaque;
-    int reg = 0;
 
     switch (addr) {
     case MENELAUS_REV:
         return 0x22;
 
-    case MENELAUS_VCORE_CTRL5: reg ++;
-    case MENELAUS_VCORE_CTRL4: reg ++;
-    case MENELAUS_VCORE_CTRL3: reg ++;
-    case MENELAUS_VCORE_CTRL2: reg ++;
-    case MENELAUS_VCORE_CTRL1:
-        return s->vcore[reg];
+    case MENELAUS_VCORE_CTRL1 ... MENELAUS_VCORE_CTRL5:
+        return s->vcore[addr - MENELAUS_VCORE_CTRL1];
 
-    case MENELAUS_DCDC_CTRL3: reg ++;
-    case MENELAUS_DCDC_CTRL2: reg ++;
-    case MENELAUS_DCDC_CTRL1:
-        return s->dcdc[reg];
-
-    case MENELAUS_LDO_CTRL8: reg ++;
-    case MENELAUS_LDO_CTRL7: reg ++;
-    case MENELAUS_LDO_CTRL6: reg ++;
-    case MENELAUS_LDO_CTRL5: reg ++;
-    case MENELAUS_LDO_CTRL4: reg ++;
-    case MENELAUS_LDO_CTRL3: reg ++;
-    case MENELAUS_LDO_CTRL2: reg ++;
-    case MENELAUS_LDO_CTRL1:
-        return s->ldo[reg];
+    case MENELAUS_DCDC_CTRL1 ... MENELAUS_DCDC_CTRL3:
+        return s->dcdc[addr - MENELAUS_DCDC_CTRL1];
+
+    case MENELAUS_LDO_CTRL1 ... MENELAUS_LDO_CTRL8:
+        return s->ldo[addr - MENELAUS_LDO_CTRL1];
 
-    case MENELAUS_SLEEP_CTRL2: reg ++;
     case MENELAUS_SLEEP_CTRL1:
-        return s->sleep[reg];
+    case MENELAUS_SLEEP_CTRL2:
+        return s->sleep[addr - MENELAUS_SLEEP_CTRL1];
 
     case MENELAUS_DEVICE_OFF:
         return 0;
@@ -395,10 +381,8 @@ static uint8_t menelaus_read(void *opaque, uint8_t addr)
     case MENELAUS_S2_PULL_DIR:
         return s->pull[3];
 
-    case MENELAUS_MCT_CTRL3: reg ++;
-    case MENELAUS_MCT_CTRL2: reg ++;
-    case MENELAUS_MCT_CTRL1:
-        return s->mmc_ctrl[reg];
+    case MENELAUS_MCT_CTRL1 ... MENELAUS_MCT_CTRL3:
+        return s->mmc_ctrl[addr - MENELAUS_MCT_CTRL1];
     case MENELAUS_MCT_PIN_ST:
         /* TODO: return the real Card Detect */
         return 0;
@@ -418,7 +402,6 @@ static void menelaus_write(void *opaque, uint8_t addr, uint8_t value)
 {
     MenelausState *s = (MenelausState *) opaque;
     int line;
-    int reg = 0;
     struct tm tm;
 
     switch (addr) {
@@ -496,9 +479,9 @@ static void menelaus_write(void *opaque, uint8_t addr, uint8_t value)
         s->ldo[7] = value & 3;
         break;
 
-    case MENELAUS_SLEEP_CTRL2: reg ++;
     case MENELAUS_SLEEP_CTRL1:
-        s->sleep[reg] = value;
+    case MENELAUS_SLEEP_CTRL2:
+        s->sleep[addr - MENELAUS_SLEEP_CTRL1] = value;
         break;
 
     case MENELAUS_DEVICE_OFF:
@@ -714,6 +697,7 @@ static void menelaus_write(void *opaque, uint8_t addr, uint8_t value)
 #ifdef VERBOSE
         printf("%s: unknown register %02x\n", __func__, addr);
 #endif
+        break;
     }
 }
 
diff --git a/hw/timer/renesas_tmr.c b/hw/timer/renesas_tmr.c
index 446f2eacdd..e03a8155b2 100644
--- a/hw/timer/renesas_tmr.c
+++ b/hw/timer/renesas_tmr.c
@@ -221,6 +221,7 @@ static uint64_t tmr_read(void *opaque, hwaddr addr, unsigned size)
         } else if (ch == 0) {
             return concat_reg(tmr->tcora);
         }
+        /* fall through */
     case A_TCORB:
         if (size == 1) {
             return tmr->tcorb[ch];