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plugins: extract generate ptr for qemu_plugin_u64

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Plugin operations can access a scoreboard. This function factorizes code
generation for accessing entry associated to a given vcpu.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-Id: <20240502211522.346467-3-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: <20240514174253.694591-5-alex.bennee@linaro.org>
This commit is contained in:
Pierrick Bouvier 2024-05-14 18:42:46 +01:00 committed by Alex Bennée
parent 21032784e5
commit 299c82b8ae
1 changed files with 18 additions and 9 deletions
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27
accel/tcg/plugin-gen.c
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@ -113,24 +113,33 @@ static void gen_udata_cb(struct qemu_plugin_dyn_cb *cb)
tcg_temp_free_i32(cpu_index);
}
static void gen_inline_add_u64_cb(struct qemu_plugin_dyn_cb *cb)
static TCGv_ptr gen_plugin_u64_ptr(qemu_plugin_u64 entry)
{
GArray *arr = cb->inline_insn.entry.score->data;
size_t offset = cb->inline_insn.entry.offset;
TCGv_i32 cpu_index = tcg_temp_ebb_new_i32();
TCGv_i64 val = tcg_temp_ebb_new_i64();
TCGv_ptr ptr = tcg_temp_ebb_new_ptr();
GArray *arr = entry.score->data;
char *base_ptr = arr->data + entry.offset;
size_t entry_size = g_array_get_element_size(arr);
TCGv_i32 cpu_index = tcg_temp_ebb_new_i32();
tcg_gen_ld_i32(cpu_index, tcg_env,
-offsetof(ArchCPU, env) + offsetof(CPUState, cpu_index));
tcg_gen_muli_i32(cpu_index, cpu_index, g_array_get_element_size(arr));
tcg_gen_muli_i32(cpu_index, cpu_index, entry_size);
tcg_gen_ext_i32_ptr(ptr, cpu_index);
tcg_temp_free_i32(cpu_index);
tcg_gen_addi_ptr(ptr, ptr, (intptr_t) base_ptr);
tcg_gen_addi_ptr(ptr, ptr, (intptr_t)arr->data);
tcg_gen_ld_i64(val, ptr, offset);
return ptr;
}
static void gen_inline_add_u64_cb(struct qemu_plugin_dyn_cb *cb)
{
TCGv_ptr ptr = gen_plugin_u64_ptr(cb->inline_insn.entry);
TCGv_i64 val = tcg_temp_ebb_new_i64();
tcg_gen_ld_i64(val, ptr, 0);
tcg_gen_addi_i64(val, val, cb->inline_insn.imm);
tcg_gen_st_i64(val, ptr, offset);
tcg_gen_st_i64(val, ptr, 0);
tcg_temp_free_i64(val);
tcg_temp_free_ptr(ptr);