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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>
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8042e2eadf
commit
62f92b8d97
4 changed files with 67 additions and 19 deletions
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@ -318,7 +318,8 @@ static struct qemu_plugin_dyn_cb *plugin_get_dyn_cb(GArray **arr)
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void plugin_register_inline_op(GArray **arr,
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enum qemu_plugin_mem_rw rw,
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enum qemu_plugin_op op, void *ptr,
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enum qemu_plugin_op op,
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void *ptr,
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uint64_t imm)
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{
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struct qemu_plugin_dyn_cb *dyn_cb;
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@ -474,9 +475,12 @@ void qemu_plugin_flush_cb(void)
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plugin_cb__simple(QEMU_PLUGIN_EV_FLUSH);
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}
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void exec_inline_op(struct qemu_plugin_dyn_cb *cb)
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void exec_inline_op(struct qemu_plugin_dyn_cb *cb, int cpu_index)
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{
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uint64_t *val = cb->userp;
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char *ptr = cb->userp;
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size_t elem_size = 0;
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size_t offset = 0;
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uint64_t *val = (uint64_t *)(ptr + offset + cpu_index * elem_size);
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switch (cb->inline_insn.op) {
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case QEMU_PLUGIN_INLINE_ADD_U64:
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@ -509,7 +513,7 @@ void qemu_plugin_vcpu_mem_cb(CPUState *cpu, uint64_t vaddr,
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vaddr, cb->userp);
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break;
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case PLUGIN_CB_INLINE:
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exec_inline_op(cb);
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exec_inline_op(cb, cpu->cpu_index);
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break;
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default:
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g_assert_not_reached();
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