[v2,12/33] plugins: Read mem_only directly from TB cflags

Commit Message

Richard Henderson April 24, 2024, 11:31 p.m. UTC

Do not pass around a boolean between multiple structures,
just read it from the TranslationBlock in the TCGContext.

Signed-off-by: Richard Henderson <[e-mail]>
---
 include/exec/plugin-gen.h |  7 +++----
 include/qemu/plugin.h     |  3 ---
 accel/tcg/plugin-gen.c    |  4 +---
 accel/tcg/translator.c    |  2 +-
 plugins/api.c             | 14 +++++++++-----
 5 files changed, 14 insertions(+), 16 deletions(-)

Comments

Philippe Mathieu-Daudé April 29, 2024, 10:45 a.m. UTC | #1

On 25/4/24 01:31, Richard Henderson wrote:
> Do not pass around a boolean between multiple structures,
> just read it from the TranslationBlock in the TCGContext.
> 
> Signed-off-by: Richard Henderson <[e-mail]>
> ---
>   include/exec/plugin-gen.h |  7 +++----
>   include/qemu/plugin.h     |  3 ---
>   accel/tcg/plugin-gen.c    |  4 +---
>   accel/tcg/translator.c    |  2 +-
>   plugins/api.c             | 14 +++++++++-----
>   5 files changed, 14 insertions(+), 16 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <[e-mail]>

Patch

diff --git a/include/exec/plugin-gen.h b/include/exec/plugin-gen.h
index f333f33198..cbb2ca2131 100644
--- a/include/exec/plugin-gen.h
+++ b/include/exec/plugin-gen.h
@@ -18,8 +18,7 @@  struct DisasContextBase;
 
 #ifdef CONFIG_PLUGIN
 
-bool plugin_gen_tb_start(CPUState *cpu, const struct DisasContextBase *db,
-                         bool supress);
+bool plugin_gen_tb_start(CPUState *cpu, const struct DisasContextBase *db);
 void plugin_gen_tb_end(CPUState *cpu, size_t num_insns);
 void plugin_gen_insn_start(CPUState *cpu, const struct DisasContextBase *db);
 void plugin_gen_insn_end(void);
@@ -28,8 +27,8 @@  void plugin_gen_disable_mem_helpers(void);
 
 #else /* !CONFIG_PLUGIN */
 
-static inline bool
-plugin_gen_tb_start(CPUState *cpu, const struct DisasContextBase *db, bool sup)
+static inline
+bool plugin_gen_tb_start(CPUState *cpu, const struct DisasContextBase *db)
 {
     return false;
 }
diff --git a/include/qemu/plugin.h b/include/qemu/plugin.h
index c32bb97667..03081be543 100644
--- a/include/qemu/plugin.h
+++ b/include/qemu/plugin.h
@@ -106,8 +106,6 @@  struct qemu_plugin_insn {
 
     /* if set, the instruction calls helpers that might access guest memory */
     bool mem_helper;
-
-    bool mem_only;
 };
 
 /* A scoreboard is an array of values, indexed by vcpu_index */
@@ -124,7 +122,6 @@  struct qemu_plugin_tb {
     uint64_t vaddr2;
     void *haddr1;
     void *haddr2;
-    bool mem_only;
 
     /* if set, the TB calls helpers that might access guest memory */
     bool mem_helper;
diff --git a/accel/tcg/plugin-gen.c b/accel/tcg/plugin-gen.c
index be2451be58..a4656859c6 100644
--- a/accel/tcg/plugin-gen.c
+++ b/accel/tcg/plugin-gen.c
@@ -303,8 +303,7 @@  static void plugin_gen_inject(struct qemu_plugin_tb *plugin_tb)
     }
 }
 
-bool plugin_gen_tb_start(CPUState *cpu, const DisasContextBase *db,
-                         bool mem_only)
+bool plugin_gen_tb_start(CPUState *cpu, const DisasContextBase *db)
 {
     bool ret = false;
 
@@ -323,7 +322,6 @@  bool plugin_gen_tb_start(CPUState *cpu, const DisasContextBase *db,
         ptb->vaddr2 = -1;
         ptb->haddr1 = db->host_addr[0];
         ptb->haddr2 = NULL;
-        ptb->mem_only = mem_only;
         ptb->mem_helper = false;
 
         tcg_gen_plugin_cb(PLUGIN_GEN_FROM_TB);
diff --git a/accel/tcg/translator.c b/accel/tcg/translator.c
index df73312f99..5a059ce83e 100644
--- a/accel/tcg/translator.c
+++ b/accel/tcg/translator.c
@@ -143,7 +143,7 @@  void translator_loop(CPUState *cpu, TranslationBlock *tb, int *max_insns,
     ops->tb_start(db, cpu);
     tcg_debug_assert(db->is_jmp == DISAS_NEXT);  /* no early exit */
 
-    plugin_enabled = plugin_gen_tb_start(cpu, db, cflags & CF_MEMI_ONLY);
+    plugin_enabled = plugin_gen_tb_start(cpu, db);
     db->plugin_enabled = plugin_enabled;
 
     while (true) {
diff --git a/plugins/api.c b/plugins/api.c
index 7b8b7523b3..39895a1cb1 100644
--- a/plugins/api.c
+++ b/plugins/api.c
@@ -87,12 +87,17 @@  void qemu_plugin_register_vcpu_exit_cb(qemu_plugin_id_t id,
     plugin_register_cb(id, QEMU_PLUGIN_EV_VCPU_EXIT, cb);
 }
 
+static bool tb_is_mem_only(void)
+{
+    return tb_cflags(tcg_ctx->gen_tb) & CF_MEMI_ONLY;
+}
+
 void qemu_plugin_register_vcpu_tb_exec_cb(struct qemu_plugin_tb *tb,
                                           qemu_plugin_vcpu_udata_cb_t cb,
                                           enum qemu_plugin_cb_flags flags,
                                           void *udata)
 {
-    if (!tb->mem_only) {
+    if (!tb_is_mem_only()) {
         plugin_register_dyn_cb__udata(&tb->cbs, cb, flags, udata);
     }
 }
@@ -103,7 +108,7 @@  void qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu(
     qemu_plugin_u64 entry,
     uint64_t imm)
 {
-    if (!tb->mem_only) {
+    if (!tb_is_mem_only()) {
         plugin_register_inline_op_on_entry(&tb->cbs, 0, op, entry, imm);
     }
 }
@@ -113,7 +118,7 @@  void qemu_plugin_register_vcpu_insn_exec_cb(struct qemu_plugin_insn *insn,
                                             enum qemu_plugin_cb_flags flags,
                                             void *udata)
 {
-    if (!insn->mem_only) {
+    if (!tb_is_mem_only()) {
         plugin_register_dyn_cb__udata(&insn->insn_cbs, cb, flags, udata);
     }
 }
@@ -124,7 +129,7 @@  void qemu_plugin_register_vcpu_insn_exec_inline_per_vcpu(
     qemu_plugin_u64 entry,
     uint64_t imm)
 {
-    if (!insn->mem_only) {
+    if (!tb_is_mem_only()) {
         plugin_register_inline_op_on_entry(&insn->insn_cbs, 0, op, entry, imm);
     }
 }
@@ -206,7 +211,6 @@  qemu_plugin_tb_get_insn(const struct qemu_plugin_tb *tb, size_t idx)
         return NULL;
     }
     insn = g_ptr_array_index(tb->insns, idx);
-    insn->mem_only = tb->mem_only;
     return insn;
 }