Extends API with three new functions:
qemu_plugin_register_vcpu_{tb, insn, mem}_exec_inline_per_vcpu().
Those functions takes a qemu_plugin_u64 as input.
This allows to have a thread-safe and type-safe version of inline
operations.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
include/qemu/plugin.h | 1 +
include/qemu/qemu-plugin.h | 51 +++++++++++++++++++++++++++++++++++-
plugins/plugin.h | 6 +++++
accel/tcg/plugin-gen.c | 7 +++++
plugins/api.c | 37 +++++++++++++++++++++++++-
plugins/core.c | 23 ++++++++++++++++
plugins/qemu-plugins.symbols | 3 +++
7 files changed, 126 insertions(+), 2 deletions(-)
diff --git a/include/qemu/plugin.h b/include/qemu/plugin.h
index 53d80341a8c..378fea77b5f 100644
--- a/include/qemu/plugin.h
+++ b/include/qemu/plugin.h
@@ -92,6 +92,7 @@ struct qemu_plugin_dyn_cb {
/* fields specific to each dyn_cb type go here */
union {
struct {
+ qemu_plugin_u64 entry;
enum qemu_plugin_op op;
uint64_t imm;
} inline_insn;
diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h
index 6442ab041be..7c33e2a5887 100644
--- a/include/qemu/qemu-plugin.h
+++ b/include/qemu/qemu-plugin.h
@@ -328,6 +328,22 @@ void qemu_plugin_register_vcpu_tb_exec_inline(struct qemu_plugin_tb *tb,
enum qemu_plugin_op op,
void *ptr, uint64_t imm);
+/**
+ * qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu() - execution inline op
+ * @tb: the opaque qemu_plugin_tb handle for the translation
+ * @op: the type of qemu_plugin_op (e.g. ADD_U64)
+ * @entry: entry to run op
+ * @imm: the op data (e.g. 1)
+ *
+ * Insert an inline op on a given scoreboard entry.
+ */
+QEMU_PLUGIN_API
+void qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu(
+ struct qemu_plugin_tb *tb,
+ enum qemu_plugin_op op,
+ qemu_plugin_u64 entry,
+ uint64_t imm);
+
/**
* qemu_plugin_register_vcpu_insn_exec_cb() - register insn execution cb
* @insn: the opaque qemu_plugin_insn handle for an instruction
@@ -358,6 +374,22 @@ void qemu_plugin_register_vcpu_insn_exec_inline(struct qemu_plugin_insn *insn,
enum qemu_plugin_op op,
void *ptr, uint64_t imm);
+/**
+ * qemu_plugin_register_vcpu_insn_exec_inline_per_vcpu() - insn exec inline op
+ * @insn: the opaque qemu_plugin_insn handle for an instruction
+ * @op: the type of qemu_plugin_op (e.g. ADD_U64)
+ * @entry: entry to run op
+ * @imm: the op data (e.g. 1)
+ *
+ * Insert an inline op to every time an instruction executes.
+ */
+QEMU_PLUGIN_API
+void qemu_plugin_register_vcpu_insn_exec_inline_per_vcpu(
+ struct qemu_plugin_insn *insn,
+ enum qemu_plugin_op op,
+ qemu_plugin_u64 entry,
+ uint64_t imm);
+
/**
* qemu_plugin_tb_n_insns() - query helper for number of insns in TB
* @tb: opaque handle to TB passed to callback
@@ -583,7 +615,24 @@ void qemu_plugin_register_vcpu_mem_inline(struct qemu_plugin_insn *insn,
enum qemu_plugin_op op, void *ptr,
uint64_t imm);
-
+/**
+ * qemu_plugin_register_vcpu_mem_inline_per_vcpu() - inline op for mem access
+ * @insn: handle for instruction to instrument
+ * @rw: apply to reads, writes or both
+ * @op: the op, of type qemu_plugin_op
+ * @entry: entry to run op
+ * @imm: immediate data for @op
+ *
+ * This registers a inline op every memory access generated by the
+ * instruction.
+ */
+QEMU_PLUGIN_API
+void qemu_plugin_register_vcpu_mem_inline_per_vcpu(
+ struct qemu_plugin_insn *insn,
+ enum qemu_plugin_mem_rw rw,
+ enum qemu_plugin_op op,
+ qemu_plugin_u64 entry,
+ uint64_t imm);
typedef void
(*qemu_plugin_vcpu_syscall_cb_t)(qemu_plugin_id_t id, unsigned int vcpu_index,
diff --git a/plugins/plugin.h b/plugins/plugin.h
index 3bf1aaf5c2d..f6fa10a0f56 100644
--- a/plugins/plugin.h
+++ b/plugins/plugin.h
@@ -73,6 +73,12 @@ void plugin_register_inline_op(GArray **arr,
enum qemu_plugin_op op, void *ptr,
uint64_t imm);
+void plugin_register_inline_op_on_entry(GArray **arr,
+ enum qemu_plugin_mem_rw rw,
+ enum qemu_plugin_op op,
+ qemu_plugin_u64 entry,
+ uint64_t imm);
+
void plugin_reset_uninstall(qemu_plugin_id_t id,
qemu_plugin_simple_cb_t cb,
bool reset);
diff --git a/accel/tcg/plugin-gen.c b/accel/tcg/plugin-gen.c
index 0f8be53d394..47e05ec6347 100644
--- a/accel/tcg/plugin-gen.c
+++ b/accel/tcg/plugin-gen.c
@@ -443,6 +443,13 @@ static TCGOp *append_inline_cb(const struct qemu_plugin_dyn_cb *cb,
char *ptr = cb->userp;
size_t elem_size = 0;
size_t offset = 0;
+ if (!ptr) {
+ /* use inline entry */
+ ptr = cb->inline_insn.entry.score->data->data;
+ elem_size = g_array_get_element_size(cb->inline_insn.entry.score->data);
+ offset = cb->inline_insn.entry.offset;
+ }
+
op = copy_ld_i32(&begin_op, op);
op = copy_mul_i32(&begin_op, op, elem_size);
op = copy_ext_i32_ptr(&begin_op, op);
diff --git a/plugins/api.c b/plugins/api.c
index af4b98a1127..5fed50d9b09 100644
--- a/plugins/api.c
+++ b/plugins/api.c
@@ -111,6 +111,18 @@ void qemu_plugin_register_vcpu_tb_exec_inline(struct qemu_plugin_tb *tb,
}
}
+void qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu(
+ struct qemu_plugin_tb *tb,
+ enum qemu_plugin_op op,
+ qemu_plugin_u64 entry,
+ uint64_t imm)
+{
+ if (!tb->mem_only) {
+ plugin_register_inline_op_on_entry(
+ &tb->cbs[PLUGIN_CB_INLINE], 0, op, entry, imm);
+ }
+}
+
void qemu_plugin_register_vcpu_insn_exec_cb(struct qemu_plugin_insn *insn,
qemu_plugin_vcpu_udata_cb_t cb,
enum qemu_plugin_cb_flags flags,
@@ -136,6 +148,18 @@ void qemu_plugin_register_vcpu_insn_exec_inline(struct qemu_plugin_insn *insn,
}
}
+void qemu_plugin_register_vcpu_insn_exec_inline_per_vcpu(
+ struct qemu_plugin_insn *insn,
+ enum qemu_plugin_op op,
+ qemu_plugin_u64 entry,
+ uint64_t imm)
+{
+ if (!insn->mem_only) {
+ plugin_register_inline_op_on_entry(
+ &insn->cbs[PLUGIN_CB_INSN][PLUGIN_CB_INLINE], 0, op, entry, imm);
+ }
+}
+
/*
* We always plant memory instrumentation because they don't finalise until
@@ -148,7 +172,7 @@ void qemu_plugin_register_vcpu_mem_cb(struct qemu_plugin_insn *insn,
void *udata)
{
plugin_register_vcpu_mem_cb(&insn->cbs[PLUGIN_CB_MEM][PLUGIN_CB_REGULAR],
- cb, flags, rw, udata);
+ cb, flags, rw, udata);
}
void qemu_plugin_register_vcpu_mem_inline(struct qemu_plugin_insn *insn,
@@ -160,6 +184,17 @@ void qemu_plugin_register_vcpu_mem_inline(struct qemu_plugin_insn *insn,
rw, op, ptr, imm);
}
+void qemu_plugin_register_vcpu_mem_inline_per_vcpu(
+ struct qemu_plugin_insn *insn,
+ enum qemu_plugin_mem_rw rw,
+ enum qemu_plugin_op op,
+ qemu_plugin_u64 entry,
+ uint64_t imm)
+{
+ plugin_register_inline_op_on_entry(
+ &insn->cbs[PLUGIN_CB_MEM][PLUGIN_CB_INLINE], rw, op, entry, imm);
+}
+
void qemu_plugin_register_vcpu_tb_trans_cb(qemu_plugin_id_t id,
qemu_plugin_vcpu_tb_trans_cb_t cb)
{
diff --git a/plugins/core.c b/plugins/core.c
index e3ec68ec286..4b428dc25b1 100644
--- a/plugins/core.c
+++ b/plugins/core.c
@@ -331,6 +331,23 @@ void plugin_register_inline_op(GArray **arr,
dyn_cb->inline_insn.imm = imm;
}
+void plugin_register_inline_op_on_entry(GArray **arr,
+ enum qemu_plugin_mem_rw rw,
+ enum qemu_plugin_op op,
+ qemu_plugin_u64 entry,
+ uint64_t imm)
+{
+ struct qemu_plugin_dyn_cb *dyn_cb;
+
+ dyn_cb = plugin_get_dyn_cb(arr);
+ dyn_cb->userp = NULL;
+ dyn_cb->type = PLUGIN_CB_INLINE;
+ dyn_cb->rw = rw;
+ dyn_cb->inline_insn.entry = entry;
+ dyn_cb->inline_insn.op = op;
+ dyn_cb->inline_insn.imm = imm;
+}
+
void plugin_register_dyn_cb__udata(GArray **arr,
qemu_plugin_vcpu_udata_cb_t cb,
enum qemu_plugin_cb_flags flags,
@@ -479,6 +496,12 @@ void exec_inline_op(struct qemu_plugin_dyn_cb *cb, int cpu_index)
char *ptr = cb->userp;
size_t elem_size = 0;
size_t offset = 0;
+ if (!ptr) {
+ /* use inline entry */
+ ptr = cb->inline_insn.entry.score->data->data;
+ elem_size = g_array_get_element_size(cb->inline_insn.entry.score->data);
+ offset = cb->inline_insn.entry.offset;
+ }
uint64_t *val = (uint64_t *)(ptr + offset + cpu_index * elem_size);
switch (cb->inline_insn.op) {
diff --git a/plugins/qemu-plugins.symbols b/plugins/qemu-plugins.symbols
index 6204453d0fd..0d8141b85f1 100644
--- a/plugins/qemu-plugins.symbols
+++ b/plugins/qemu-plugins.symbols
@@ -28,13 +28,16 @@
qemu_plugin_register_vcpu_init_cb;
qemu_plugin_register_vcpu_insn_exec_cb;
qemu_plugin_register_vcpu_insn_exec_inline;
+ qemu_plugin_register_vcpu_insn_exec_inline_per_vcpu;
qemu_plugin_register_vcpu_mem_cb;
qemu_plugin_register_vcpu_mem_inline;
+ qemu_plugin_register_vcpu_mem_inline_per_vcpu;
qemu_plugin_register_vcpu_resume_cb;
qemu_plugin_register_vcpu_syscall_cb;
qemu_plugin_register_vcpu_syscall_ret_cb;
qemu_plugin_register_vcpu_tb_exec_cb;
qemu_plugin_register_vcpu_tb_exec_inline;
+ qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu;
qemu_plugin_register_vcpu_tb_trans_cb;
qemu_plugin_reset;
qemu_plugin_scoreboard_free;
--
2.43.0
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