plugins: implement inline operation relative to cpu_index

Instead of working on a fixed memory location, allow to address it based
on cpu_index, an element size and a given offset.
Result address: ptr + offset + cpu_index * element_size.

With this, we can target a member in a struct array from a base pointer.

Current semantic is not modified, thus inline operation still targets
always the same memory location.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-Id: <20240304130036.124418-4-pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240305121005.3528075-17-alex.bennee@linaro.org>
This commit is contained in:
Pierrick Bouvier 2024-03-05 12:09:52 +00:00 committed by Alex Bennée
parent 8042e2eadf
commit 62f92b8d97
4 changed files with 67 additions and 19 deletions

View file

@ -318,7 +318,8 @@ static struct qemu_plugin_dyn_cb *plugin_get_dyn_cb(GArray **arr)
void plugin_register_inline_op(GArray **arr,
enum qemu_plugin_mem_rw rw,
enum qemu_plugin_op op, void *ptr,
enum qemu_plugin_op op,
void *ptr,
uint64_t imm)
{
struct qemu_plugin_dyn_cb *dyn_cb;
@ -474,9 +475,12 @@ void qemu_plugin_flush_cb(void)
plugin_cb__simple(QEMU_PLUGIN_EV_FLUSH);
}
void exec_inline_op(struct qemu_plugin_dyn_cb *cb)
void exec_inline_op(struct qemu_plugin_dyn_cb *cb, int cpu_index)
{
uint64_t *val = cb->userp;
char *ptr = cb->userp;
size_t elem_size = 0;
size_t offset = 0;
uint64_t *val = (uint64_t *)(ptr + offset + cpu_index * elem_size);
switch (cb->inline_insn.op) {
case QEMU_PLUGIN_INLINE_ADD_U64:
@ -509,7 +513,7 @@ void qemu_plugin_vcpu_mem_cb(CPUState *cpu, uint64_t vaddr,
vaddr, cb->userp);
break;
case PLUGIN_CB_INLINE:
exec_inline_op(cb);
exec_inline_op(cb, cpu->cpu_index);
break;
default:
g_assert_not_reached();