[PATCH v7 40/60] target/xtensa: Make xtensa_cpu_tlb_fill sysemu only

[Richard Henderson <richard.henderson@linaro.org>]

The fallback code in cpu_loop_exit_sigsegv is sufficient
for xtensa linux-user.

Remove the code from cpu_loop that raised SIGSEGV.

Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/xtensa/cpu.h          |  2 +-
 linux-user/xtensa/cpu_loop.c |  9 ---------
 target/xtensa/cpu.c          |  2 +-
 target/xtensa/helper.c       | 22 +---------------------
 4 files changed, 3 insertions(+), 32 deletions(-)

diff --git a/target/xtensa/cpu.h b/target/xtensa/cpu.h
index f9a510ca46..02143f2f77 100644
--- a/target/xtensa/cpu.h
+++ b/target/xtensa/cpu.h
@@ -563,10 +563,10 @@ struct XtensaCPU {
 };
 
 
+#ifndef CONFIG_USER_ONLY
 bool xtensa_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
                          MMUAccessType access_type, int mmu_idx,
                          bool probe, uintptr_t retaddr);
-#ifndef CONFIG_USER_ONLY
 void xtensa_cpu_do_interrupt(CPUState *cpu);
 bool xtensa_cpu_exec_interrupt(CPUState *cpu, int interrupt_request);
 void xtensa_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, vaddr addr,
diff --git a/linux-user/xtensa/cpu_loop.c b/linux-user/xtensa/cpu_loop.c
index 622afbcd34..a83490ab35 100644
--- a/linux-user/xtensa/cpu_loop.c
+++ b/linux-user/xtensa/cpu_loop.c
@@ -226,15 +226,6 @@ void cpu_loop(CPUXtensaState *env)
                 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
                 break;
 
-            case LOAD_PROHIBITED_CAUSE:
-            case STORE_PROHIBITED_CAUSE:
-                info.si_signo = TARGET_SIGSEGV;
-                info.si_errno = 0;
-                info.si_code = TARGET_SEGV_ACCERR;
-                info._sifields._sigfault._addr = env->sregs[EXCVADDR];
-                queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
-                break;
-
             default:
                 fprintf(stderr, "exccause = %d\n", env->sregs[EXCCAUSE]);
                 g_assert_not_reached();
diff --git a/target/xtensa/cpu.c b/target/xtensa/cpu.c
index c1cbd03595..224f723236 100644
--- a/target/xtensa/cpu.c
+++ b/target/xtensa/cpu.c
@@ -192,10 +192,10 @@ static const struct SysemuCPUOps xtensa_sysemu_ops = {
 
 static const struct TCGCPUOps xtensa_tcg_ops = {
     .initialize = xtensa_translate_init,
-    .tlb_fill = xtensa_cpu_tlb_fill,
     .debug_excp_handler = xtensa_breakpoint_handler,
 
 #ifndef CONFIG_USER_ONLY
+    .tlb_fill = xtensa_cpu_tlb_fill,
     .cpu_exec_interrupt = xtensa_cpu_exec_interrupt,
     .do_interrupt = xtensa_cpu_do_interrupt,
     .do_transaction_failed = xtensa_cpu_do_transaction_failed,
diff --git a/target/xtensa/helper.c b/target/xtensa/helper.c
index f18ab383fd..29d216ec1b 100644
--- a/target/xtensa/helper.c
+++ b/target/xtensa/helper.c
@@ -242,27 +242,7 @@ void xtensa_cpu_list(void)
     }
 }
 
-#ifdef CONFIG_USER_ONLY
-
-bool xtensa_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
-                         MMUAccessType access_type, int mmu_idx,
-                         bool probe, uintptr_t retaddr)
-{
-    XtensaCPU *cpu = XTENSA_CPU(cs);
-    CPUXtensaState *env = &cpu->env;
-
-    qemu_log_mask(CPU_LOG_INT,
-                  "%s: rw = %d, address = 0x%08" VADDR_PRIx ", size = %d\n",
-                  __func__, access_type, address, size);
-    env->sregs[EXCVADDR] = address;
-    env->sregs[EXCCAUSE] = (access_type == MMU_DATA_STORE ?
-                            STORE_PROHIBITED_CAUSE : LOAD_PROHIBITED_CAUSE);
-    cs->exception_index = EXC_USER;
-    cpu_loop_exit_restore(cs, retaddr);
-}
-
-#else /* !CONFIG_USER_ONLY */
-
+#ifndef CONFIG_USER_ONLY
 void xtensa_cpu_do_unaligned_access(CPUState *cs,
                                     vaddr addr, MMUAccessType access_type,
                                     int mmu_idx, uintptr_t retaddr)
-- 
2.25.1