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[PATCH v5 05/43] tcg: Move tcg prologue pointer out of TCGContext
From: |
Richard Henderson |
Subject: |
[PATCH v5 05/43] tcg: Move tcg prologue pointer out of TCGContext |
Date: |
Tue, 5 Jan 2021 07:19:12 -1000 |
This value is constant across all thread-local copies of TCGContext,
so we might as well move it out of thread-local storage.
Use the correct function pointer type, and name the variable
tcg_qemu_tb_exec, which means that we are able to remove the
macro that does the casting.
Replace HAVE_TCG_QEMU_TB_EXEC with CONFIG_TCG_INTERPRETER,
as this is somewhat clearer in intent.
Reviewed-by: Joelle van Dyne <j@getutm.app>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
include/tcg/tcg.h | 9 ++++-----
tcg/tcg.c | 9 ++++++++-
tcg/tci.c | 3 ++-
3 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h
index 8ff9dad4ef..9cc412f90c 100644
--- a/include/tcg/tcg.h
+++ b/include/tcg/tcg.h
@@ -621,7 +621,6 @@ struct TCGContext {
here, because there's too much arithmetic throughout that relies
on addition and subtraction working on bytes. Rely on the GCC
extension that allows arithmetic on void*. */
- void *code_gen_prologue;
void *code_gen_epilogue;
void *code_gen_buffer;
size_t code_gen_buffer_size;
@@ -1222,11 +1221,11 @@ static inline unsigned get_mmuidx(TCGMemOpIdx oi)
#define TB_EXIT_IDXMAX 1
#define TB_EXIT_REQUESTED 3
-#ifdef HAVE_TCG_QEMU_TB_EXEC
-uintptr_t tcg_qemu_tb_exec(CPUArchState *env, uint8_t *tb_ptr);
+#ifdef CONFIG_TCG_INTERPRETER
+uintptr_t tcg_qemu_tb_exec(CPUArchState *env, void *tb_ptr);
#else
-# define tcg_qemu_tb_exec(env, tb_ptr) \
- ((uintptr_t (*)(void *, void *))tcg_ctx->code_gen_prologue)(env, tb_ptr)
+typedef uintptr_t tcg_prologue_fn(CPUArchState *env, void *tb_ptr);
+extern tcg_prologue_fn *tcg_qemu_tb_exec;
#endif
void tcg_register_jit(void *buf, size_t buf_size);
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 759a41d848..b686cc9ba8 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -162,6 +162,10 @@ static TCGContext **tcg_ctxs;
static unsigned int n_tcg_ctxs;
TCGv_env cpu_env = 0;
+#ifndef CONFIG_TCG_INTERPRETER
+tcg_prologue_fn *tcg_qemu_tb_exec;
+#endif
+
struct tcg_region_tree {
QemuMutex lock;
GTree *tree;
@@ -1055,7 +1059,10 @@ void tcg_prologue_init(TCGContext *s)
s->code_ptr = buf0;
s->code_buf = buf0;
s->data_gen_ptr = NULL;
- s->code_gen_prologue = buf0;
+
+#ifndef CONFIG_TCG_INTERPRETER
+ tcg_qemu_tb_exec = (tcg_prologue_fn *)buf0;
+#endif
/* Compute a high-water mark, at which we voluntarily flush the buffer
and start over. The size here is arbitrary, significantly larger
diff --git a/tcg/tci.c b/tcg/tci.c
index 82039fd163..d996eb7cf8 100644
--- a/tcg/tci.c
+++ b/tcg/tci.c
@@ -475,8 +475,9 @@ static bool tci_compare64(uint64_t u0, uint64_t u1, TCGCond
condition)
#endif
/* Interpret pseudo code in tb. */
-uintptr_t tcg_qemu_tb_exec(CPUArchState *env, uint8_t *tb_ptr)
+uintptr_t tcg_qemu_tb_exec(CPUArchState *env, void *v_tb_ptr)
{
+ uint8_t *tb_ptr = v_tb_ptr;
tcg_target_ulong regs[TCG_TARGET_NB_REGS];
long tcg_temps[CPU_TEMP_BUF_NLONGS];
uintptr_t sp_value = (uintptr_t)(tcg_temps + CPU_TEMP_BUF_NLONGS);
--
2.25.1
- [PATCH v5 00/43] Mirror map JIT memory for TCG, Richard Henderson, 2021/01/05
- [PATCH v5 01/43] tcg: Do not flush icache for interpreter, Richard Henderson, 2021/01/05
- [PATCH v5 03/43] util: Enhance flush_icache_range with separate data pointer, Richard Henderson, 2021/01/05
- [PATCH v5 02/43] util: Extract flush_icache_range to cacheflush.c, Richard Henderson, 2021/01/05
- [PATCH v5 05/43] tcg: Move tcg prologue pointer out of TCGContext,
Richard Henderson <=
- [PATCH v5 04/43] util: Specialize flush_idcache_range for aarch64, Richard Henderson, 2021/01/05
- [PATCH v5 07/43] tcg: Add in_code_gen_buffer, Richard Henderson, 2021/01/05
- [PATCH v5 06/43] tcg: Move tcg epilogue pointer out of TCGContext, Richard Henderson, 2021/01/05
- [PATCH v5 09/43] tcg: Adjust TCGLabel for const, Richard Henderson, 2021/01/05
- [PATCH v5 11/43] tcg: Adjust tcg_out_label for const, Richard Henderson, 2021/01/05
- [PATCH v5 14/43] tcg: Make DisasContextBase.tb const, Richard Henderson, 2021/01/05
- [PATCH v5 13/43] tcg: Adjust tb_target_set_jmp_target for split-wx, Richard Henderson, 2021/01/05
- [PATCH v5 21/43] tcg/i386: Support split-wx code generation, Richard Henderson, 2021/01/05
- [PATCH v5 12/43] tcg: Adjust tcg_register_jit for const, Richard Henderson, 2021/01/05
- [PATCH v5 15/43] tcg: Make tb arg to synchronize_from_tb const, Richard Henderson, 2021/01/05