plugins: add inline operation per vcpu

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>
Message-Id: <20240304130036.124418-5-pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240305121005.3528075-18-alex.bennee@linaro.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/plugins/core.c b/plugins/core.c
index 65d5611f79..7852590da8 100644
--- a/plugins/core.c
+++ b/plugins/core.c
@@ -332,6 +332,23 @@ 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,
@@ -480,6 +497,12 @@ 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) {