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[Qemu-devel] [PATCH 02/20] target/openrisc: Use exit_tb instead of CPU_I
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 02/20] target/openrisc: Use exit_tb instead of CPU_INTERRUPT_EXITTB |
Date: |
Sun, 27 May 2018 09:13:06 -0500 |
No need to use the interrupt mechanisms when we can
simply exit the tb directly.
Signed-off-by: Richard Henderson <address@hidden>
---
target/openrisc/interrupt_helper.c | 3 +--
target/openrisc/translate.c | 6 +++---
2 files changed, 4 insertions(+), 5 deletions(-)
diff --git a/target/openrisc/interrupt_helper.c
b/target/openrisc/interrupt_helper.c
index 56620e0571..b865738f8b 100644
--- a/target/openrisc/interrupt_helper.c
+++ b/target/openrisc/interrupt_helper.c
@@ -26,7 +26,6 @@
void HELPER(rfe)(CPUOpenRISCState *env)
{
OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
- CPUState *cs = CPU(cpu);
#ifndef CONFIG_USER_ONLY
int need_flush_tlb = (cpu->env.sr & (SR_SM | SR_IME | SR_DME)) ^
(cpu->env.esr & (SR_SM | SR_IME | SR_DME));
@@ -53,8 +52,8 @@ void HELPER(rfe)(CPUOpenRISCState *env)
}
if (need_flush_tlb) {
+ CPUState *cs = CPU(cpu);
tlb_flush(cs);
}
#endif
- cs->interrupt_request |= CPU_INTERRUPT_EXITTB;
}
diff --git a/target/openrisc/translate.c b/target/openrisc/translate.c
index f4f2f37e28..dae673afa4 100644
--- a/target/openrisc/translate.c
+++ b/target/openrisc/translate.c
@@ -41,6 +41,7 @@
## __VA_ARGS__)
/* is_jmp field values */
+#define DISAS_EXIT DISAS_TARGET_0 /* force exit to main loop */
#define DISAS_UPDATE DISAS_TARGET_1 /* cpu state was modified dynamically */
typedef struct DisasContext {
@@ -1233,7 +1234,7 @@ static bool trans_l_rfe(DisasContext *dc, arg_l_rfe *a,
uint32_t insn)
gen_illegal_exception(dc);
} else {
gen_helper_rfe(cpu_env);
- dc->base.is_jmp = DISAS_UPDATE;
+ dc->base.is_jmp = DISAS_EXIT;
}
#endif
return true;
@@ -1467,8 +1468,7 @@ static void openrisc_tr_tb_stop(DisasContextBase *dcbase,
CPUState *cs)
case DISAS_NORETURN:
break;
case DISAS_UPDATE:
- /* indicate that the hash table must be used
- to find the next TB */
+ case DISAS_EXIT:
tcg_gen_exit_tb(0);
break;
default:
--
2.17.0