target-arm: do not set do_interrupt handlers for ARM and AArch64 user modes

User mode emulation should never get interrupts and thus should not
use the system emulation exception handler function. Remove the reference,
and '#ifndef USER_MODE_ONLY' the function itself as well, so that we can add
system mode only functionality to it.

Signed-off-by: Rob Herring <rob.herring@linaro.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1412865028-17725-3-git-send-email-peter.maydell@linaro.org

target-arm/cpu.c

diff --git a/target-arm/cpu.c b/target-arm/cpu.c
index 67cd176..2061cb7 100644
--- a/target-arm/cpu.c
+++ b/target-arm/cpu.c
@@ -1109,7 +1109,6 @@
 
     cc->class_by_name = arm_cpu_class_by_name;
     cc->has_work = arm_cpu_has_work;
-    cc->do_interrupt = arm_cpu_do_interrupt;
     cc->cpu_exec_interrupt = arm_cpu_exec_interrupt;
     cc->dump_state = arm_cpu_dump_state;
     cc->set_pc = arm_cpu_set_pc;
@@ -1118,6 +1117,7 @@
 #ifdef CONFIG_USER_ONLY
     cc->handle_mmu_fault = arm_cpu_handle_mmu_fault;
 #else
+    cc->do_interrupt = arm_cpu_do_interrupt;
     cc->get_phys_page_debug = arm_cpu_get_phys_page_debug;
     cc->vmsd = &vmstate_arm_cpu;
 #endif

target-arm/cpu64.c

diff --git a/target-arm/cpu64.c b/target-arm/cpu64.c
index c30f47e..a95367a 100644
--- a/target-arm/cpu64.c
+++ b/target-arm/cpu64.c
@@ -196,7 +196,9 @@
 {
     CPUClass *cc = CPU_CLASS(oc);
 
+#if !defined(CONFIG_USER_ONLY)
     cc->do_interrupt = aarch64_cpu_do_interrupt;
+#endif
     cc->cpu_exec_interrupt = arm_cpu_exec_interrupt;
     cc->set_pc = aarch64_cpu_set_pc;
     cc->gdb_read_register = aarch64_cpu_gdb_read_register;

target-arm/helper-a64.c

diff --git a/target-arm/helper-a64.c b/target-arm/helper-a64.c
index 8228e29..7ae84f6 100644
--- a/target-arm/helper-a64.c
+++ b/target-arm/helper-a64.c
@@ -438,6 +438,8 @@
     return crc32c(acc, buf, bytes) ^ 0xffffffff;
 }
 
+#if !defined(CONFIG_USER_ONLY)
+
 /* Handle a CPU exception.  */
 void aarch64_cpu_do_interrupt(CPUState *cs)
 {
@@ -518,3 +520,4 @@
     env->pc = addr;
     cs->interrupt_request |= CPU_INTERRUPT_EXITTB;
 }
+#endif

target-arm/helper.c

diff --git a/target-arm/helper.c b/target-arm/helper.c
index 2669e15..497178a 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -3644,11 +3644,6 @@
 
 #if defined(CONFIG_USER_ONLY)
 
-void arm_cpu_do_interrupt(CPUState *cs)
-{
-    cs->exception_index = -1;
-}
-
 int arm_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
                              int mmu_idx)
 {