[PATCH v7 35/60] target/riscv: Make riscv_cpu_tlb_fill sysemu only

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

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

Remove the code from cpu_loop that raised SIGSEGV.

Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 linux-user/riscv/cpu_loop.c |  7 -------
 target/riscv/cpu.c          |  2 +-
 target/riscv/cpu_helper.c   | 21 +--------------------
 3 files changed, 2 insertions(+), 28 deletions(-)

diff --git a/linux-user/riscv/cpu_loop.c b/linux-user/riscv/cpu_loop.c
index e5bb6d908a..b301dac802 100644
--- a/linux-user/riscv/cpu_loop.c
+++ b/linux-user/riscv/cpu_loop.c
@@ -87,13 +87,6 @@ void cpu_loop(CPURISCVState *env)
             sigcode = TARGET_TRAP_BRKPT;
             sigaddr = env->pc;
             break;
-        case RISCV_EXCP_INST_PAGE_FAULT:
-        case RISCV_EXCP_LOAD_PAGE_FAULT:
-        case RISCV_EXCP_STORE_PAGE_FAULT:
-            signum = TARGET_SIGSEGV;
-            sigcode = TARGET_SEGV_MAPERR;
-            sigaddr = env->badaddr;
-            break;
         case RISCV_EXCP_SEMIHOST:
             env->gpr[xA0] = do_common_semihosting(cs);
             env->pc += 4;
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 7d53125dbc..f812998123 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -694,9 +694,9 @@ static const struct SysemuCPUOps riscv_sysemu_ops = {
 static const struct TCGCPUOps riscv_tcg_ops = {
     .initialize = riscv_translate_init,
     .synchronize_from_tb = riscv_cpu_synchronize_from_tb,
-    .tlb_fill = riscv_cpu_tlb_fill,
 
 #ifndef CONFIG_USER_ONLY
+    .tlb_fill = riscv_cpu_tlb_fill,
     .cpu_exec_interrupt = riscv_cpu_exec_interrupt,
     .do_interrupt = riscv_cpu_do_interrupt,
     .do_transaction_failed = riscv_cpu_do_transaction_failed,
diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index f30ff672f8..9eeed38c7e 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -814,7 +814,6 @@ void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
                             riscv_cpu_two_stage_lookup(mmu_idx);
     riscv_raise_exception(env, cs->exception_index, retaddr);
 }
-#endif /* !CONFIG_USER_ONLY */
 
 bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
                         MMUAccessType access_type, int mmu_idx,
@@ -822,7 +821,6 @@ bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
 {
     RISCVCPU *cpu = RISCV_CPU(cs);
     CPURISCVState *env = &cpu->env;
-#ifndef CONFIG_USER_ONLY
     vaddr im_address;
     hwaddr pa = 0;
     int prot, prot2, prot_pmp;
@@ -954,25 +952,8 @@ bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
     }
 
     return true;
-
-#else
-    switch (access_type) {
-    case MMU_INST_FETCH:
-        cs->exception_index = RISCV_EXCP_INST_PAGE_FAULT;
-        break;
-    case MMU_DATA_LOAD:
-        cs->exception_index = RISCV_EXCP_LOAD_PAGE_FAULT;
-        break;
-    case MMU_DATA_STORE:
-        cs->exception_index = RISCV_EXCP_STORE_PAGE_FAULT;
-        break;
-    default:
-        g_assert_not_reached();
-    }
-    env->badaddr = address;
-    cpu_loop_exit_restore(cs, retaddr);
-#endif
 }
+#endif /* !CONFIG_USER_ONLY */
 
 /*
  * Handle Traps
-- 
2.25.1