From: Pierrick Bouvier <pierrick.bouvier@linaro.org>
This new operation can store an immediate u64 value to a given
scoreboard.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-Id: <20240502211522.346467-4-pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
include/qemu/plugin.h | 1 +
include/qemu/qemu-plugin.h | 4 ++--
accel/tcg/plugin-gen.c | 13 +++++++++++++
plugins/core.c | 6 ++++++
4 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/include/qemu/plugin.h b/include/qemu/plugin.h
index 93da98b76c..6c21a30105 100644
--- a/include/qemu/plugin.h
+++ b/include/qemu/plugin.h
@@ -70,6 +70,7 @@ enum plugin_dyn_cb_type {
PLUGIN_CB_REGULAR,
PLUGIN_CB_MEM_REGULAR,
PLUGIN_CB_INLINE_ADD_U64,
+ PLUGIN_CB_INLINE_STORE_U64,
};
/*
diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h
index 4fc6c3739b..c5cac897a0 100644
--- a/include/qemu/qemu-plugin.h
+++ b/include/qemu/qemu-plugin.h
@@ -305,12 +305,12 @@ void qemu_plugin_register_vcpu_tb_exec_cb(struct qemu_plugin_tb *tb,
* enum qemu_plugin_op - describes an inline op
*
* @QEMU_PLUGIN_INLINE_ADD_U64: add an immediate value uint64_t
- *
- * Note: currently only a single inline op is supported.
+ * @QEMU_PLUGIN_INLINE_STORE_U64: store an immediate value uint64_t
*/
enum qemu_plugin_op {
QEMU_PLUGIN_INLINE_ADD_U64,
+ QEMU_PLUGIN_INLINE_STORE_U64,
};
/**
diff --git a/accel/tcg/plugin-gen.c b/accel/tcg/plugin-gen.c
index 97868781fe..88976289eb 100644
--- a/accel/tcg/plugin-gen.c
+++ b/accel/tcg/plugin-gen.c
@@ -145,6 +145,16 @@ static void gen_inline_add_u64_cb(struct qemu_plugin_dyn_cb *cb)
tcg_temp_free_ptr(ptr);
}
+static void gen_inline_store_u64_cb(struct qemu_plugin_dyn_cb *cb)
+{
+ TCGv_ptr ptr = gen_plugin_u64_ptr(cb->inline_insn.entry);
+ TCGv_i64 val = tcg_constant_i64(cb->inline_insn.imm);
+
+ tcg_gen_st_i64(val, ptr, 0);
+
+ tcg_temp_free_ptr(ptr);
+}
+
static void gen_mem_cb(struct qemu_plugin_dyn_cb *cb,
qemu_plugin_meminfo_t meminfo, TCGv_i64 addr)
{
@@ -170,6 +180,9 @@ static void inject_cb(struct qemu_plugin_dyn_cb *cb)
case PLUGIN_CB_INLINE_ADD_U64:
gen_inline_add_u64_cb(cb);
break;
+ case PLUGIN_CB_INLINE_STORE_U64:
+ gen_inline_store_u64_cb(cb);
+ break;
default:
g_assert_not_reached();
}
diff --git a/plugins/core.c b/plugins/core.c
index 59771eda8f..848d482fc4 100644
--- a/plugins/core.c
+++ b/plugins/core.c
@@ -321,6 +321,8 @@ static enum plugin_dyn_cb_type op_to_cb_type(enum qemu_plugin_op op)
switch (op) {
case QEMU_PLUGIN_INLINE_ADD_U64:
return PLUGIN_CB_INLINE_ADD_U64;
+ case QEMU_PLUGIN_INLINE_STORE_U64:
+ return PLUGIN_CB_INLINE_STORE_U64;
default:
g_assert_not_reached();
}
@@ -535,6 +537,9 @@ void exec_inline_op(struct qemu_plugin_dyn_cb *cb, int cpu_index)
case QEMU_PLUGIN_INLINE_ADD_U64:
*val += cb->inline_insn.imm;
break;
+ case QEMU_PLUGIN_INLINE_STORE_U64:
+ *val = cb->inline_insn.imm;
+ break;
default:
g_assert_not_reached();
}
@@ -562,6 +567,7 @@ void qemu_plugin_vcpu_mem_cb(CPUState *cpu, uint64_t vaddr,
vaddr, cb->userp);
break;
case PLUGIN_CB_INLINE_ADD_U64:
+ case PLUGIN_CB_INLINE_STORE_U64:
exec_inline_op(cb, cpu->cpu_index);
break;
default:
--
2.39.2