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plugins: add new inline op STORE_U64

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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>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240514174253.694591-6-alex.bennee@linaro.org>
This commit is contained in:
Pierrick Bouvier 2024-05-14 18:42:47 +01:00 committed by Alex Bennée
parent 299c82b8ae
commit 36a1d8e710
4 changed files with 22 additions and 2 deletions
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13
accel/tcg/plugin-gen.c
View File

@ -145,6 +145,16 @@ static void gen_inline_add_u64_cb(struct qemu_plugin_dyn_cb *cb)
tcg_temp_free_ptr(ptr); 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, static void gen_mem_cb(struct qemu_plugin_dyn_cb *cb,
qemu_plugin_meminfo_t meminfo, TCGv_i64 addr) 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: case PLUGIN_CB_INLINE_ADD_U64:
gen_inline_add_u64_cb(cb); gen_inline_add_u64_cb(cb);
break; break;
case PLUGIN_CB_INLINE_STORE_U64:
gen_inline_store_u64_cb(cb);
break;
default: default:
g_assert_not_reached(); g_assert_not_reached();
} }

1
include/qemu/plugin.h
View File

@ -70,6 +70,7 @@ enum plugin_dyn_cb_type {
PLUGIN_CB_REGULAR, PLUGIN_CB_REGULAR,
PLUGIN_CB_MEM_REGULAR, PLUGIN_CB_MEM_REGULAR,
PLUGIN_CB_INLINE_ADD_U64, PLUGIN_CB_INLINE_ADD_U64,
PLUGIN_CB_INLINE_STORE_U64,
}; };
/* /*

4
include/qemu/qemu-plugin.h
View File

@ -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 * enum qemu_plugin_op - describes an inline op
* *
* @QEMU_PLUGIN_INLINE_ADD_U64: add an immediate value uint64_t * @QEMU_PLUGIN_INLINE_ADD_U64: add an immediate value uint64_t
* * @QEMU_PLUGIN_INLINE_STORE_U64: store an immediate value uint64_t
* Note: currently only a single inline op is supported.
*/ */
enum qemu_plugin_op { enum qemu_plugin_op {
QEMU_PLUGIN_INLINE_ADD_U64, QEMU_PLUGIN_INLINE_ADD_U64,
QEMU_PLUGIN_INLINE_STORE_U64,
}; };
/** /**

6
plugins/core.c
View File

@ -321,6 +321,8 @@ static enum plugin_dyn_cb_type op_to_cb_type(enum qemu_plugin_op op)
switch (op) { switch (op) {
case QEMU_PLUGIN_INLINE_ADD_U64: case QEMU_PLUGIN_INLINE_ADD_U64:
return PLUGIN_CB_INLINE_ADD_U64; return PLUGIN_CB_INLINE_ADD_U64;
case QEMU_PLUGIN_INLINE_STORE_U64:
return PLUGIN_CB_INLINE_STORE_U64;
default: default:
g_assert_not_reached(); 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: case QEMU_PLUGIN_INLINE_ADD_U64:
*val += cb->inline_insn.imm; *val += cb->inline_insn.imm;
break; break;
case QEMU_PLUGIN_INLINE_STORE_U64:
*val = cb->inline_insn.imm;
break;
default: default:
g_assert_not_reached(); g_assert_not_reached();
} }
@ -562,6 +567,7 @@ void qemu_plugin_vcpu_mem_cb(CPUState *cpu, uint64_t vaddr,
vaddr, cb->userp); vaddr, cb->userp);
break; break;
case PLUGIN_CB_INLINE_ADD_U64: case PLUGIN_CB_INLINE_ADD_U64:
case PLUGIN_CB_INLINE_STORE_U64:
exec_inline_op(cb, cpu->cpu_index); exec_inline_op(cb, cpu->cpu_index);
break; break;
default: default: