Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20200117-1' into staging

Add model of the Netduino Plus 2 board
Some allwinner-a10 code cleanup
New test cases for cubieboard
target/arm/arm-semi: fix SYS_OPEN to return nonzero filehandle
i.MX: add an emulation for RNGC device
target/arm: adjust program counter for wfi exception in AArch32
arm/gicv3: update virtual irq state after IAR register read
Set IL bit correctly for syndrome information for data aborts

# gpg: Signature made Fri 17 Jan 2020 14:27:40 GMT
# gpg:                using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg:                issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [ultimate]
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>" [ultimate]
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [ultimate]
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* remotes/pmaydell/tags/pull-target-arm-20200117-1:
  target/arm: Set ISSIs16Bit in make_issinfo
  target/arm: Return correct IL bit in merge_syn_data_abort
  arm/gicv3: update virtual irq state after IAR register read
  target/arm: adjust program counter for wfi exception in AArch32
  i.MX: add an emulation for RNGC
  target/arm/arm-semi: fix SYS_OPEN to return nonzero filehandle
  hw/arm/allwinner-a10: Remove local qemu_irq variables
  hw/arm/allwinner-a10: Simplify by passing IRQs with qdev_pass_gpios()
  hw/arm/allwinner-a10: Move SoC definitions out of header
  tests/boot_linux_console: Add a SD card test for the CubieBoard
  tests/boot_linux_console: Add initrd test for the CubieBoard
  hw/arm: Add the Netduino Plus 2
  hw/arm: Add the STM32F4xx SoC
  hw/misc: Add the STM32F4xx EXTI device
  hw/misc: Add the STM32F4xx Sysconfig device

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

4 files changed, 13 insertions, 4 deletions

diff --git a/target/arm/arm-semi.c b/target/arm/arm-semi.c
index 47d61f6fe1..788fe61b51 100644
--- a/target/arm/arm-semi.c
+++ b/target/arm/arm-semi.c
@@ -144,7 +144,8 @@ static int alloc_guestfd(void)
         guestfd_array = g_array_new(FALSE, TRUE, sizeof(GuestFD));
     }
 
-    for (i = 0; i < guestfd_array->len; i++) {
+    /* SYS_OPEN should return nonzero handle on success. Start guestfd from 1 */
+    for (i = 1; i < guestfd_array->len; i++) {
         GuestFD *gf = &g_array_index(guestfd_array, GuestFD, i);
 
         if (gf->type == GuestFDUnused) {
@@ -168,7 +169,7 @@ static GuestFD *do_get_guestfd(int guestfd)
         return NULL;
     }
 
-    if (guestfd < 0 || guestfd >= guestfd_array->len) {
+    if (guestfd <= 0 || guestfd >= guestfd_array->len) {
         return NULL;
     }
 
diff --git a/target/arm/op_helper.c b/target/arm/op_helper.c
index e5a346cb87..27d16ad9ad 100644
--- a/target/arm/op_helper.c
+++ b/target/arm/op_helper.c
@@ -295,7 +295,12 @@ void HELPER(wfi)(CPUARMState *env, uint32_t insn_len)
     }
 
     if (target_el) {
-        env->pc -= insn_len;
+        if (env->aarch64) {
+            env->pc -= insn_len;
+        } else {
+            env->regs[15] -= insn_len;
+        }
+
         raise_exception(env, EXCP_UDEF, syn_wfx(1, 0xe, 0, insn_len == 2),
                         target_el);
     }
diff --git a/target/arm/tlb_helper.c b/target/arm/tlb_helper.c
index 5feb312941..e63f8bda29 100644
--- a/target/arm/tlb_helper.c
+++ b/target/arm/tlb_helper.c
@@ -44,7 +44,7 @@ static inline uint32_t merge_syn_data_abort(uint32_t template_syn,
         syn = syn_data_abort_with_iss(same_el,
                                       0, 0, 0, 0, 0,
                                       ea, 0, s1ptw, is_write, fsc,
-                                      false);
+                                      true);
         /* Merge the runtime syndrome with the template syndrome.  */
         syn |= template_syn;
     }
diff --git a/target/arm/translate.c b/target/arm/translate.c
index 0c8624fb42..2f4aea927f 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -8556,6 +8556,9 @@ static ISSInfo make_issinfo(DisasContext *s, int rd, bool p, bool w)
     /* ISS not valid if writeback */
     if (p && !w) {
         ret = rd;
+        if (s->base.pc_next - s->pc_curr == 2) {
+            ret |= ISSIs16Bit;
+        }
     } else {
         ret = ISSInvalid;
     }