Merge tag 'pull-tcg-20240501' of https://gitlab.com/rth7680/qemu into staging

plugins: Rewrite plugin tcg expansion

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# gpg: Signature made Wed 01 May 2024 07:32:57 AM PDT
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [ultimate]

* tag 'pull-tcg-20240501' of https://gitlab.com/rth7680/qemu:
  plugins: Update the documentation block for plugin-gen.c
  plugins: Inline plugin_gen_empty_callback
  plugins: Merge qemu_plugin_tb_insn_get to plugin-gen.c
  plugins: Split out common cb expanders
  plugins: Replace pr_ops with a proper debug dump flag
  plugins: Introduce PLUGIN_CB_MEM_REGULAR
  plugins: Simplify callback queues
  tcg: Remove INDEX_op_plugin_cb_{start,end}
  tcg: Remove TCG_CALL_PLUGIN
  plugins: Remove plugin helpers
  plugins: Use emit_before_op for PLUGIN_GEN_FROM_MEM
  plugins: Use emit_before_op for PLUGIN_GEN_FROM_INSN
  plugins: Add PLUGIN_GEN_AFTER_TB
  plugins: Use emit_before_op for PLUGIN_GEN_FROM_TB
  plugins: Use emit_before_op for PLUGIN_GEN_AFTER_INSN
  plugins: Create TCGHelperInfo for all out-of-line callbacks
  plugins: Move function pointer in qemu_plugin_dyn_cb
  plugins: Zero new qemu_plugin_dyn_cb entries
  tcg: Pass function pointer to tcg_gen_call*
  tcg: Make tcg/helper-info.h self-contained

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

10 files changed, 46 insertions, 95 deletions

diff --git a/include/exec/helper-gen-common.h b/include/exec/helper-gen-common.h
index 5d6d78a..834590d 100644
--- a/include/exec/helper-gen-common.h
+++ b/include/exec/helper-gen-common.h
@@ -11,8 +11,4 @@
 #include "exec/helper-gen.h.inc"
 #undef  HELPER_H
 
-#define HELPER_H "accel/tcg/plugin-helpers.h"
-#include "exec/helper-gen.h.inc"
-#undef  HELPER_H
-
 #endif /* HELPER_GEN_COMMON_H */
diff --git a/include/exec/helper-gen.h.inc b/include/exec/helper-gen.h.inc
index d9fd3ed..dabe138 100644
--- a/include/exec/helper-gen.h.inc
+++ b/include/exec/helper-gen.h.inc
@@ -14,7 +14,8 @@
 extern TCGHelperInfo glue(helper_info_, name);                          \
 static inline void glue(gen_helper_, name)(dh_retvar_decl0(ret))        \
 {                                                                       \
-    tcg_gen_call0(&glue(helper_info_, name), dh_retvar(ret));           \
+    tcg_gen_call0(glue(helper_info_,name).func,                         \
+                  &glue(helper_info_,name), dh_retvar(ret));            \
 }
 
 #define DEF_HELPER_FLAGS_1(name, flags, ret, t1)                        \
@@ -22,7 +23,8 @@ extern TCGHelperInfo glue(helper_info_, name);                          \
 static inline void glue(gen_helper_, name)(dh_retvar_decl(ret)          \
     dh_arg_decl(t1, 1))                                                 \
 {                                                                       \
-    tcg_gen_call1(&glue(helper_info_, name), dh_retvar(ret),            \
+    tcg_gen_call1(glue(helper_info_,name).func,                         \
+                  &glue(helper_info_,name), dh_retvar(ret),             \
                   dh_arg(t1, 1));                                       \
 }
 
@@ -31,7 +33,8 @@ extern TCGHelperInfo glue(helper_info_, name);                          \
 static inline void glue(gen_helper_, name)(dh_retvar_decl(ret)          \
     dh_arg_decl(t1, 1), dh_arg_decl(t2, 2))                             \
 {                                                                       \
-    tcg_gen_call2(&glue(helper_info_, name), dh_retvar(ret),            \
+    tcg_gen_call2(glue(helper_info_,name).func,                         \
+                  &glue(helper_info_,name), dh_retvar(ret),             \
                   dh_arg(t1, 1), dh_arg(t2, 2));                        \
 }
 
@@ -40,7 +43,8 @@ extern TCGHelperInfo glue(helper_info_, name);                          \
 static inline void glue(gen_helper_, name)(dh_retvar_decl(ret)          \
     dh_arg_decl(t1, 1), dh_arg_decl(t2, 2), dh_arg_decl(t3, 3))         \
 {                                                                       \
-    tcg_gen_call3(&glue(helper_info_, name), dh_retvar(ret),            \
+    tcg_gen_call3(glue(helper_info_,name).func,                         \
+                  &glue(helper_info_,name), dh_retvar(ret),             \
                   dh_arg(t1, 1), dh_arg(t2, 2), dh_arg(t3, 3));         \
 }
 
@@ -50,7 +54,8 @@ static inline void glue(gen_helper_, name)(dh_retvar_decl(ret)          \
     dh_arg_decl(t1, 1), dh_arg_decl(t2, 2),                             \
     dh_arg_decl(t3, 3), dh_arg_decl(t4, 4))                             \
 {                                                                       \
-    tcg_gen_call4(&glue(helper_info_, name), dh_retvar(ret),            \
+    tcg_gen_call4(glue(helper_info_,name).func,                         \
+                  &glue(helper_info_,name), dh_retvar(ret),             \
                   dh_arg(t1, 1), dh_arg(t2, 2),                         \
                   dh_arg(t3, 3), dh_arg(t4, 4));                        \
 }
@@ -61,7 +66,8 @@ static inline void glue(gen_helper_, name)(dh_retvar_decl(ret)          \
     dh_arg_decl(t1, 1), dh_arg_decl(t2, 2), dh_arg_decl(t3, 3),         \
     dh_arg_decl(t4, 4), dh_arg_decl(t5, 5))                             \
 {                                                                       \
-    tcg_gen_call5(&glue(helper_info_, name), dh_retvar(ret),            \
+    tcg_gen_call5(glue(helper_info_,name).func,                         \
+                  &glue(helper_info_,name), dh_retvar(ret),             \
                   dh_arg(t1, 1), dh_arg(t2, 2), dh_arg(t3, 3),          \
                   dh_arg(t4, 4), dh_arg(t5, 5));                        \
 }
@@ -72,7 +78,8 @@ static inline void glue(gen_helper_, name)(dh_retvar_decl(ret)          \
     dh_arg_decl(t1, 1), dh_arg_decl(t2, 2), dh_arg_decl(t3, 3),         \
     dh_arg_decl(t4, 4), dh_arg_decl(t5, 5), dh_arg_decl(t6, 6))         \
 {                                                                       \
-    tcg_gen_call6(&glue(helper_info_, name), dh_retvar(ret),            \
+    tcg_gen_call6(glue(helper_info_,name).func,                         \
+                  &glue(helper_info_,name), dh_retvar(ret),             \
                   dh_arg(t1, 1), dh_arg(t2, 2), dh_arg(t3, 3),          \
                   dh_arg(t4, 4), dh_arg(t5, 5), dh_arg(t6, 6));         \
 }
@@ -84,7 +91,8 @@ static inline void glue(gen_helper_, name)(dh_retvar_decl(ret)          \
     dh_arg_decl(t4, 4), dh_arg_decl(t5, 5), dh_arg_decl(t6, 6),         \
     dh_arg_decl(t7, 7))                                                 \
 {                                                                       \
-    tcg_gen_call7(&glue(helper_info_, name), dh_retvar(ret),            \
+    tcg_gen_call7(glue(helper_info_,name).func,                         \
+                  &glue(helper_info_,name), dh_retvar(ret),             \
                   dh_arg(t1, 1), dh_arg(t2, 2), dh_arg(t3, 3),          \
                   dh_arg(t4, 4), dh_arg(t5, 5), dh_arg(t6, 6),          \
                   dh_arg(t7, 7));                                       \
diff --git a/include/exec/helper-proto-common.h b/include/exec/helper-proto-common.h
index 8b67170..16782ef 100644
--- a/include/exec/helper-proto-common.h
+++ b/include/exec/helper-proto-common.h
@@ -13,8 +13,4 @@
 #include "exec/helper-proto.h.inc"
 #undef  HELPER_H
 
-#define HELPER_H "accel/tcg/plugin-helpers.h"
-#include "exec/helper-proto.h.inc"
-#undef  HELPER_H
-
 #endif /* HELPER_PROTO_COMMON_H */
diff --git a/include/exec/plugin-gen.h b/include/exec/plugin-gen.h
index c4552b5..f333f33 100644
--- a/include/exec/plugin-gen.h
+++ b/include/exec/plugin-gen.h
@@ -25,7 +25,6 @@ void plugin_gen_insn_start(CPUState *cpu, const struct DisasContextBase *db);
 void plugin_gen_insn_end(void);
 
 void plugin_gen_disable_mem_helpers(void);
-void plugin_gen_empty_mem_callback(TCGv_i64 addr, uint32_t info);
 
 #else /* !CONFIG_PLUGIN */
 
@@ -48,9 +47,6 @@ static inline void plugin_gen_tb_end(CPUState *cpu, size_t num_insns)
 static inline void plugin_gen_disable_mem_helpers(void)
 { }
 
-static inline void plugin_gen_empty_mem_callback(TCGv_i64 addr, uint32_t info)
-{ }
-
 #endif /* CONFIG_PLUGIN */
 
 #endif /* QEMU_PLUGIN_GEN_H */
diff --git a/include/qemu/log.h b/include/qemu/log.h
index df59bfa..e10e24c 100644
--- a/include/qemu/log.h
+++ b/include/qemu/log.h
@@ -36,6 +36,7 @@ bool qemu_log_separate(void);
 #define LOG_STRACE         (1 << 19)
 #define LOG_PER_THREAD     (1 << 20)
 #define CPU_LOG_TB_VPU     (1 << 21)
+#define LOG_TB_OP_PLUGIN   (1 << 22)
 
 /* Lock/unlock output. */
 
diff --git a/include/qemu/plugin.h b/include/qemu/plugin.h
index 41db748..1806252 100644
--- a/include/qemu/plugin.h
+++ b/include/qemu/plugin.h
@@ -67,16 +67,9 @@ union qemu_plugin_cb_sig {
 };
 
 enum plugin_dyn_cb_type {
-    PLUGIN_CB_INSN,
-    PLUGIN_CB_MEM,
-    PLUGIN_N_CB_TYPES,
-};
-
-enum plugin_dyn_cb_subtype {
     PLUGIN_CB_REGULAR,
-    PLUGIN_CB_REGULAR_R,
+    PLUGIN_CB_MEM_REGULAR,
     PLUGIN_CB_INLINE,
-    PLUGIN_N_CB_SUBTYPES,
 };
 
 /*
@@ -85,14 +78,17 @@ enum plugin_dyn_cb_subtype {
  * instance of a callback to be called upon the execution of a particular TB.
  */
 struct qemu_plugin_dyn_cb {
-    union qemu_plugin_cb_sig f;
     void *userp;
-    enum plugin_dyn_cb_subtype type;
+    enum plugin_dyn_cb_type type;
     /* @rw applies to mem callbacks only (both regular and inline) */
     enum qemu_plugin_mem_rw rw;
     /* fields specific to each dyn_cb type go here */
     union {
         struct {
+            union qemu_plugin_cb_sig f;
+            TCGHelperInfo *info;
+        } regular;
+        struct {
             qemu_plugin_u64 entry;
             enum qemu_plugin_op op;
             uint64_t imm;
@@ -105,7 +101,8 @@ struct qemu_plugin_insn {
     GByteArray *data;
     uint64_t vaddr;
     void *haddr;
-    GArray *cbs[PLUGIN_N_CB_TYPES][PLUGIN_N_CB_SUBTYPES];
+    GArray *insn_cbs;
+    GArray *mem_cbs;
     bool calls_helpers;
 
     /* if set, the instruction calls helpers that might access guest memory */
@@ -132,21 +129,6 @@ static inline void qemu_plugin_insn_cleanup_fn(gpointer data)
     g_byte_array_free(insn->data, true);
 }
 
-static inline struct qemu_plugin_insn *qemu_plugin_insn_alloc(void)
-{
-    int i, j;
-    struct qemu_plugin_insn *insn = g_new0(struct qemu_plugin_insn, 1);
-    insn->data = g_byte_array_sized_new(4);
-
-    for (i = 0; i < PLUGIN_N_CB_TYPES; i++) {
-        for (j = 0; j < PLUGIN_N_CB_SUBTYPES; j++) {
-            insn->cbs[i][j] = g_array_new(false, false,
-                                          sizeof(struct qemu_plugin_dyn_cb));
-        }
-    }
-    return insn;
-}
-
 /* Internal context for this TranslationBlock */
 struct qemu_plugin_tb {
     GPtrArray *insns;
@@ -160,41 +142,10 @@ struct qemu_plugin_tb {
     /* if set, the TB calls helpers that might access guest memory */
     bool mem_helper;
 
-    GArray *cbs[PLUGIN_N_CB_SUBTYPES];
+    GArray *cbs;
 };
 
 /**
- * qemu_plugin_tb_insn_get(): get next plugin record for translation.
- * @tb: the internal tb context
- * @pc: address of instruction
- */
-static inline
-struct qemu_plugin_insn *qemu_plugin_tb_insn_get(struct qemu_plugin_tb *tb,
-                                                 uint64_t pc)
-{
-    struct qemu_plugin_insn *insn;
-    int i, j;
-
-    if (unlikely(tb->n == tb->insns->len)) {
-        struct qemu_plugin_insn *new_insn = qemu_plugin_insn_alloc();
-        g_ptr_array_add(tb->insns, new_insn);
-    }
-    insn = g_ptr_array_index(tb->insns, tb->n++);
-    g_byte_array_set_size(insn->data, 0);
-    insn->calls_helpers = false;
-    insn->mem_helper = false;
-    insn->vaddr = pc;
-
-    for (i = 0; i < PLUGIN_N_CB_TYPES; i++) {
-        for (j = 0; j < PLUGIN_N_CB_SUBTYPES; j++) {
-            g_array_set_size(insn->cbs[i][j], 0);
-        }
-    }
-
-    return insn;
-}
-
-/**
  * struct CPUPluginState - per-CPU state for plugins
  * @event_mask: plugin event bitmap. Modified only via async work.
  */
diff --git a/include/tcg/helper-info.h b/include/tcg/helper-info.h
index 7c27d61..909fe73 100644
--- a/include/tcg/helper-info.h
+++ b/include/tcg/helper-info.h
@@ -12,6 +12,9 @@
 #ifdef CONFIG_TCG_INTERPRETER
 #include <ffi.h>
 #endif
+#include "tcg-target-reg-bits.h"
+
+#define MAX_CALL_IARGS  7
 
 /*
  * Describe the calling convention of a given argument type.
diff --git a/include/tcg/tcg-op-common.h b/include/tcg/tcg-op-common.h
index 2d932a5..009e277 100644
--- a/include/tcg/tcg-op-common.h
+++ b/include/tcg/tcg-op-common.h
@@ -74,8 +74,8 @@ void tcg_gen_goto_tb(unsigned idx);
  */
 void tcg_gen_lookup_and_goto_ptr(void);
 
-void tcg_gen_plugin_cb_start(unsigned from, unsigned type, unsigned wr);
-void tcg_gen_plugin_cb_end(void);
+void tcg_gen_plugin_cb(unsigned from);
+void tcg_gen_plugin_mem_cb(TCGv_i64 addr, unsigned meminfo);
 
 /* 32 bit ops */
 
diff --git a/include/tcg/tcg-opc.h b/include/tcg/tcg-opc.h
index b80227f..546eb49 100644
--- a/include/tcg/tcg-opc.h
+++ b/include/tcg/tcg-opc.h
@@ -197,8 +197,8 @@ DEF(exit_tb, 0, 0, 1, TCG_OPF_BB_EXIT | TCG_OPF_BB_END)
 DEF(goto_tb, 0, 0, 1, TCG_OPF_BB_EXIT | TCG_OPF_BB_END)
 DEF(goto_ptr, 0, 1, 0, TCG_OPF_BB_EXIT | TCG_OPF_BB_END)
 
-DEF(plugin_cb_start, 0, 0, 3, TCG_OPF_NOT_PRESENT)
-DEF(plugin_cb_end, 0, 0, 0, TCG_OPF_NOT_PRESENT)
+DEF(plugin_cb, 0, 0, 1, TCG_OPF_NOT_PRESENT)
+DEF(plugin_mem_cb, 0, 1, 1, TCG_OPF_NOT_PRESENT)
 
 /* Replicate ld/st ops for 32 and 64-bit guest addresses. */
 DEF(qemu_ld_a32_i32, 1, 1, 1,
diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h
index 05a1912..135e36d 100644
--- a/include/tcg/tcg.h
+++ b/include/tcg/tcg.h
@@ -39,8 +39,6 @@
 /* XXX: make safe guess about sizes */
 #define MAX_OP_PER_INSTR 266
 
-#define MAX_CALL_IARGS  7
-
 #define CPU_TEMP_BUF_NLONGS 128
 #define TCG_STATIC_FRAME_SIZE  (CPU_TEMP_BUF_NLONGS * sizeof(long))
 
@@ -355,8 +353,6 @@ typedef TCGv_ptr TCGv_env;
 #define TCG_CALL_NO_SIDE_EFFECTS    0x0004
 /* Helper is G_NORETURN.  */
 #define TCG_CALL_NO_RETURN          0x0008
-/* Helper is part of Plugins.  */
-#define TCG_CALL_PLUGIN             0x0010
 
 /* convenience version of most used call flags */
 #define TCG_CALL_NO_RWG         TCG_CALL_NO_READ_GLOBALS
@@ -854,19 +850,22 @@ typedef struct TCGTargetOpDef {
 
 bool tcg_op_supported(TCGOpcode op);
 
-void tcg_gen_call0(TCGHelperInfo *, TCGTemp *ret);
-void tcg_gen_call1(TCGHelperInfo *, TCGTemp *ret, TCGTemp *);
-void tcg_gen_call2(TCGHelperInfo *, TCGTemp *ret, TCGTemp *, TCGTemp *);
-void tcg_gen_call3(TCGHelperInfo *, TCGTemp *ret, TCGTemp *,
-                   TCGTemp *, TCGTemp *);
-void tcg_gen_call4(TCGHelperInfo *, TCGTemp *ret, TCGTemp *, TCGTemp *,
+void tcg_gen_call0(void *func, TCGHelperInfo *, TCGTemp *ret);
+void tcg_gen_call1(void *func, TCGHelperInfo *, TCGTemp *ret, TCGTemp *);
+void tcg_gen_call2(void *func, TCGHelperInfo *, TCGTemp *ret,
                    TCGTemp *, TCGTemp *);
-void tcg_gen_call5(TCGHelperInfo *, TCGTemp *ret, TCGTemp *, TCGTemp *,
+void tcg_gen_call3(void *func, TCGHelperInfo *, TCGTemp *ret,
                    TCGTemp *, TCGTemp *, TCGTemp *);
-void tcg_gen_call6(TCGHelperInfo *, TCGTemp *ret, TCGTemp *, TCGTemp *,
+void tcg_gen_call4(void *func, TCGHelperInfo *, TCGTemp *ret,
                    TCGTemp *, TCGTemp *, TCGTemp *, TCGTemp *);
-void tcg_gen_call7(TCGHelperInfo *, TCGTemp *ret, TCGTemp *, TCGTemp *,
+void tcg_gen_call5(void *func, TCGHelperInfo *, TCGTemp *ret,
                    TCGTemp *, TCGTemp *, TCGTemp *, TCGTemp *, TCGTemp *);
+void tcg_gen_call6(void *func, TCGHelperInfo *, TCGTemp *ret,
+                   TCGTemp *, TCGTemp *, TCGTemp *, TCGTemp *,
+                   TCGTemp *, TCGTemp *);
+void tcg_gen_call7(void *func, TCGHelperInfo *, TCGTemp *ret,
+                   TCGTemp *, TCGTemp *, TCGTemp *, TCGTemp *,
+                   TCGTemp *, TCGTemp *, TCGTemp *);
 
 TCGOp *tcg_emit_op(TCGOpcode opc, unsigned nargs);
 void tcg_op_remove(TCGContext *s, TCGOp *op);
@@ -1071,5 +1070,6 @@ static inline const TCGOpcode *tcg_swap_vecop_list(const TCGOpcode *n)
 }
 
 bool tcg_can_emit_vecop_list(const TCGOpcode *, TCGType, unsigned);
+void tcg_dump_ops(TCGContext *s, FILE *f, bool have_prefs);
 
 #endif /* TCG_H */