From 70863887a84caae2cfaf31b3ce900452d87553bd Mon Sep 17 00:00:00 2001
From: Richard Henderson <richard.henderson@linaro.org>
Date: Tue, 14 Sep 2021 16:32:17 -0700
Subject: [PATCH] target/hexagon: Remove hexagon_cpu_tlb_fill

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

Remove the code from cpu_loop that raises SIGSEGV.

Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 linux-user/hexagon/cpu_loop.c | 24 +-----------------------
 target/hexagon/cpu.c          | 23 -----------------------
 2 files changed, 1 insertion(+), 46 deletions(-)

diff --git a/linux-user/hexagon/cpu_loop.c b/linux-user/hexagon/cpu_loop.c
index bee2a9e4ea..6b24cbaba9 100644
--- a/linux-user/hexagon/cpu_loop.c
+++ b/linux-user/hexagon/cpu_loop.c
@@ -28,8 +28,7 @@
 void cpu_loop(CPUHexagonState *env)
 {
     CPUState *cs = env_cpu(env);
-    int trapnr, signum, sigcode;
-    target_ulong sigaddr;
+    int trapnr;
     target_ulong syscallnum;
     target_ulong ret;
 
@@ -39,10 +38,6 @@ void cpu_loop(CPUHexagonState *env)
         cpu_exec_end(cs);
         process_queued_cpu_work(cs);
 
-        signum = 0;
-        sigcode = 0;
-        sigaddr = 0;
-
         switch (trapnr) {
         case EXCP_INTERRUPT:
             /* just indicate that signals should be handled asap */
@@ -65,12 +60,6 @@ void cpu_loop(CPUHexagonState *env)
                 env->gpr[0] = ret;
             }
             break;
-        case HEX_EXCP_FETCH_NO_UPAGE:
-        case HEX_EXCP_PRIV_NO_UREAD:
-        case HEX_EXCP_PRIV_NO_UWRITE:
-            signum = TARGET_SIGSEGV;
-            sigcode = TARGET_SEGV_MAPERR;
-            break;
         case EXCP_ATOMIC:
             cpu_exec_step_atomic(cs);
             break;
@@ -79,17 +68,6 @@ void cpu_loop(CPUHexagonState *env)
                      trapnr);
             exit(EXIT_FAILURE);
         }
-
-        if (signum) {
-            target_siginfo_t info = {
-                .si_signo = signum,
-                .si_errno = 0,
-                .si_code = sigcode,
-                ._sifields._sigfault._addr = sigaddr
-            };
-            queue_signal(env, info.si_signo, QEMU_SI_KILL, &info);
-        }
-
         process_pending_signals(env);
     }
 }
diff --git a/target/hexagon/cpu.c b/target/hexagon/cpu.c
index 3338365c16..160a46a3d5 100644
--- a/target/hexagon/cpu.c
+++ b/target/hexagon/cpu.c
@@ -245,34 +245,11 @@ static void hexagon_cpu_init(Object *obj)
     qdev_property_add_static(DEVICE(obj), &hexagon_lldb_stack_adjust_property);
 }
 
-static bool hexagon_tlb_fill(CPUState *cs, vaddr address, int size,
-                             MMUAccessType access_type, int mmu_idx,
-                             bool probe, uintptr_t retaddr)
-{
-#ifdef CONFIG_USER_ONLY
-    switch (access_type) {
-    case MMU_INST_FETCH:
-        cs->exception_index = HEX_EXCP_FETCH_NO_UPAGE;
-        break;
-    case MMU_DATA_LOAD:
-        cs->exception_index = HEX_EXCP_PRIV_NO_UREAD;
-        break;
-    case MMU_DATA_STORE:
-        cs->exception_index = HEX_EXCP_PRIV_NO_UWRITE;
-        break;
-    }
-    cpu_loop_exit_restore(cs, retaddr);
-#else
-#error System mode not implemented for Hexagon
-#endif
-}
-
 #include "hw/core/tcg-cpu-ops.h"
 
 static const struct TCGCPUOps hexagon_tcg_ops = {
     .initialize = hexagon_translate_init,
     .synchronize_from_tb = hexagon_cpu_synchronize_from_tb,
-    .tlb_fill = hexagon_tlb_fill,
 };
 
 static void hexagon_cpu_class_init(ObjectClass *c, void *data)
-- 
2.30.2