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Tsirkin" , Mahmoud Mandour Subject: [PATCH 09/11] plugins: distinct types for callbacks Date: Tue, 14 May 2024 18:42:51 +0100 Message-Id: <20240514174253.694591-10-alex.bennee@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240514174253.694591-1-alex.bennee@linaro.org> References: <20240514174253.694591-1-alex.bennee@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::62f; envelope-from=alex.bennee@linaro.org; helo=mail-ej1-x62f.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org From: Pierrick Bouvier To prevent errors when writing new types of callbacks or inline operations, we split callbacks data to distinct types. Reviewed-by: Richard Henderson Signed-off-by: Pierrick Bouvier Message-Id: <20240502211522.346467-8-pierrick.bouvier@linaro.org> Signed-off-by: Alex Bennée --- include/qemu/plugin.h | 46 ++++++++++++++----------- plugins/plugin.h | 2 +- accel/tcg/plugin-gen.c | 58 +++++++++++++++++--------------- plugins/core.c | 76 ++++++++++++++++++++++-------------------- 4 files changed, 98 insertions(+), 84 deletions(-) diff --git a/include/qemu/plugin.h b/include/qemu/plugin.h index c7b3b1cd66..98d27dded9 100644 --- a/include/qemu/plugin.h +++ b/include/qemu/plugin.h @@ -74,34 +74,40 @@ enum plugin_dyn_cb_type { PLUGIN_CB_INLINE_STORE_U64, }; +struct qemu_plugin_regular_cb { + union qemu_plugin_cb_sig f; + TCGHelperInfo *info; + void *userp; + enum qemu_plugin_mem_rw rw; +}; + +struct qemu_plugin_inline_cb { + qemu_plugin_u64 entry; + enum qemu_plugin_op op; + uint64_t imm; + enum qemu_plugin_mem_rw rw; +}; + +struct qemu_plugin_conditional_cb { + union qemu_plugin_cb_sig f; + TCGHelperInfo *info; + void *userp; + qemu_plugin_u64 entry; + enum qemu_plugin_cond cond; + uint64_t imm; +}; + /* * A dynamic callback has an insertion point that is determined at run-time. * Usually the insertion point is somewhere in the code cache; think for * instance of a callback to be called upon the execution of a particular TB. */ struct qemu_plugin_dyn_cb { - void *userp; enum plugin_dyn_cb_type type; - /* @rw applies to mem callbacks only (both regular and inline) */ - enum qemu_plugin_mem_rw rw; - /* fields specific to each dyn_cb type go here */ union { - struct { - union qemu_plugin_cb_sig f; - TCGHelperInfo *info; - } regular; - struct { - union qemu_plugin_cb_sig f; - TCGHelperInfo *info; - qemu_plugin_u64 entry; - enum qemu_plugin_cond cond; - uint64_t imm; - } cond; - struct { - qemu_plugin_u64 entry; - enum qemu_plugin_op op; - uint64_t imm; - } inline_insn; + struct qemu_plugin_regular_cb regular; + struct qemu_plugin_conditional_cb cond; + struct qemu_plugin_inline_cb inline_insn; }; }; diff --git a/plugins/plugin.h b/plugins/plugin.h index 7d4b4e21f7..80d5daa917 100644 --- a/plugins/plugin.h +++ b/plugins/plugin.h @@ -108,7 +108,7 @@ void plugin_register_vcpu_mem_cb(GArray **arr, enum qemu_plugin_mem_rw rw, void *udata); -void exec_inline_op(struct qemu_plugin_dyn_cb *cb, int cpu_index); +void exec_inline_op(struct qemu_plugin_inline_cb *cb, int cpu_index); int plugin_num_vcpus(void); diff --git a/accel/tcg/plugin-gen.c b/accel/tcg/plugin-gen.c index f2190f3511..e018728573 100644 --- a/accel/tcg/plugin-gen.c +++ b/accel/tcg/plugin-gen.c @@ -101,13 +101,13 @@ static void gen_disable_mem_helper(void) offsetof(ArchCPU, env)); } -static void gen_udata_cb(struct qemu_plugin_dyn_cb *cb) +static void gen_udata_cb(struct qemu_plugin_regular_cb *cb) { 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_call2(cb->regular.f.vcpu_udata, cb->regular.info, NULL, + tcg_gen_call2(cb->f.vcpu_udata, cb->info, NULL, tcgv_i32_temp(cpu_index), tcgv_ptr_temp(tcg_constant_ptr(cb->userp))); tcg_temp_free_i32(cpu_index); @@ -153,21 +153,21 @@ static TCGCond plugin_cond_to_tcgcond(enum qemu_plugin_cond cond) } } -static void gen_udata_cond_cb(struct qemu_plugin_dyn_cb *cb) +static void gen_udata_cond_cb(struct qemu_plugin_conditional_cb *cb) { - TCGv_ptr ptr = gen_plugin_u64_ptr(cb->cond.entry); + TCGv_ptr ptr = gen_plugin_u64_ptr(cb->entry); TCGv_i32 cpu_index = tcg_temp_ebb_new_i32(); TCGv_i64 val = tcg_temp_ebb_new_i64(); TCGLabel *after_cb = gen_new_label(); /* Condition should be negated, as calling the cb is the "else" path */ - TCGCond cond = tcg_invert_cond(plugin_cond_to_tcgcond(cb->cond.cond)); + TCGCond cond = tcg_invert_cond(plugin_cond_to_tcgcond(cb->cond)); tcg_gen_ld_i64(val, ptr, 0); - tcg_gen_brcondi_i64(cond, val, cb->cond.imm, after_cb); + tcg_gen_brcondi_i64(cond, val, cb->imm, after_cb); tcg_gen_ld_i32(cpu_index, tcg_env, -offsetof(ArchCPU, env) + offsetof(CPUState, cpu_index)); - tcg_gen_call2(cb->cond.f.vcpu_udata, cb->cond.info, NULL, + tcg_gen_call2(cb->f.vcpu_udata, cb->info, NULL, tcgv_i32_temp(cpu_index), tcgv_ptr_temp(tcg_constant_ptr(cb->userp))); gen_set_label(after_cb); @@ -177,37 +177,37 @@ static void gen_udata_cond_cb(struct qemu_plugin_dyn_cb *cb) tcg_temp_free_ptr(ptr); } -static void gen_inline_add_u64_cb(struct qemu_plugin_dyn_cb *cb) +static void gen_inline_add_u64_cb(struct qemu_plugin_inline_cb *cb) { - TCGv_ptr ptr = gen_plugin_u64_ptr(cb->inline_insn.entry); + TCGv_ptr ptr = gen_plugin_u64_ptr(cb->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_addi_i64(val, val, cb->imm); tcg_gen_st_i64(val, ptr, 0); tcg_temp_free_i64(val); tcg_temp_free_ptr(ptr); } -static void gen_inline_store_u64_cb(struct qemu_plugin_dyn_cb *cb) +static void gen_inline_store_u64_cb(struct qemu_plugin_inline_cb *cb) { - TCGv_ptr ptr = gen_plugin_u64_ptr(cb->inline_insn.entry); - TCGv_i64 val = tcg_constant_i64(cb->inline_insn.imm); + TCGv_ptr ptr = gen_plugin_u64_ptr(cb->entry); + TCGv_i64 val = tcg_constant_i64(cb->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_regular_cb *cb, qemu_plugin_meminfo_t meminfo, TCGv_i64 addr) { 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_call4(cb->regular.f.vcpu_mem, cb->regular.info, NULL, + tcg_gen_call4(cb->f.vcpu_mem, cb->info, NULL, tcgv_i32_temp(cpu_index), tcgv_i32_temp(tcg_constant_i32(meminfo)), tcgv_i64_temp(addr), @@ -220,16 +220,16 @@ static void inject_cb(struct qemu_plugin_dyn_cb *cb) { switch (cb->type) { case PLUGIN_CB_REGULAR: - gen_udata_cb(cb); + gen_udata_cb(&cb->regular); break; case PLUGIN_CB_COND: - gen_udata_cond_cb(cb); + gen_udata_cond_cb(&cb->cond); break; case PLUGIN_CB_INLINE_ADD_U64: - gen_inline_add_u64_cb(cb); + gen_inline_add_u64_cb(&cb->inline_insn); break; case PLUGIN_CB_INLINE_STORE_U64: - gen_inline_store_u64_cb(cb); + gen_inline_store_u64_cb(&cb->inline_insn); break; default: g_assert_not_reached(); @@ -240,15 +240,21 @@ static void inject_mem_cb(struct qemu_plugin_dyn_cb *cb, enum qemu_plugin_mem_rw rw, qemu_plugin_meminfo_t meminfo, TCGv_i64 addr) { - if (cb->rw & rw) { - switch (cb->type) { - case PLUGIN_CB_MEM_REGULAR: - gen_mem_cb(cb, meminfo, addr); - break; - default: + switch (cb->type) { + case PLUGIN_CB_MEM_REGULAR: + if (rw && cb->regular.rw) { + gen_mem_cb(&cb->regular, meminfo, addr); + } + break; + case PLUGIN_CB_INLINE_ADD_U64: + case PLUGIN_CB_INLINE_STORE_U64: + if (rw && cb->inline_insn.rw) { inject_cb(cb); - break; } + break; + default: + g_assert_not_reached(); + break; } } diff --git a/plugins/core.c b/plugins/core.c index 332474a5bc..1c85edc5e5 100644 --- a/plugins/core.c +++ b/plugins/core.c @@ -336,13 +336,13 @@ void plugin_register_inline_op_on_entry(GArray **arr, { struct qemu_plugin_dyn_cb *dyn_cb; + struct qemu_plugin_inline_cb inline_cb = { .rw = rw, + .entry = entry, + .op = op, + .imm = imm }; dyn_cb = plugin_get_dyn_cb(arr); - dyn_cb->userp = NULL; dyn_cb->type = op_to_cb_type(op); - dyn_cb->rw = rw; - dyn_cb->inline_insn.entry = entry; - dyn_cb->inline_insn.op = op; - dyn_cb->inline_insn.imm = imm; + dyn_cb->inline_insn = inline_cb; } void plugin_register_dyn_cb__udata(GArray **arr, @@ -361,14 +361,14 @@ void plugin_register_dyn_cb__udata(GArray **arr, dh_typemask(i32, 1) | dh_typemask(ptr, 2)) }; + assert((unsigned)flags < ARRAY_SIZE(info)); struct qemu_plugin_dyn_cb *dyn_cb = plugin_get_dyn_cb(arr); - dyn_cb->userp = udata; + struct qemu_plugin_regular_cb regular_cb = { .f.vcpu_udata = cb, + .userp = udata, + .info = &info[flags] }; dyn_cb->type = PLUGIN_CB_REGULAR; - dyn_cb->regular.f.vcpu_udata = cb; - - assert((unsigned)flags < ARRAY_SIZE(info)); - dyn_cb->regular.info = &info[flags]; + dyn_cb->regular = regular_cb; } void plugin_register_dyn_cond_cb__udata(GArray **arr, @@ -390,17 +390,17 @@ void plugin_register_dyn_cond_cb__udata(GArray **arr, dh_typemask(i32, 1) | dh_typemask(ptr, 2)) }; + assert((unsigned)flags < ARRAY_SIZE(info)); struct qemu_plugin_dyn_cb *dyn_cb = plugin_get_dyn_cb(arr); - dyn_cb->userp = udata; + struct qemu_plugin_conditional_cb cond_cb = { .userp = udata, + .f.vcpu_udata = cb, + .cond = cond, + .entry = entry, + .imm = imm, + .info = &info[flags] }; dyn_cb->type = PLUGIN_CB_COND; - dyn_cb->cond.f.vcpu_udata = cb; - dyn_cb->cond.cond = cond; - dyn_cb->cond.entry = entry; - dyn_cb->cond.imm = imm; - - assert((unsigned)flags < ARRAY_SIZE(info)); - dyn_cb->cond.info = &info[flags]; + dyn_cb->cond = cond_cb; } void plugin_register_vcpu_mem_cb(GArray **arr, @@ -432,15 +432,15 @@ void plugin_register_vcpu_mem_cb(GArray **arr, dh_typemask(i64, 3) | dh_typemask(ptr, 4)) }; + assert((unsigned)flags < ARRAY_SIZE(info)); struct qemu_plugin_dyn_cb *dyn_cb = plugin_get_dyn_cb(arr); - dyn_cb->userp = udata; + struct qemu_plugin_regular_cb regular_cb = { .userp = udata, + .rw = rw, + .f.vcpu_mem = cb, + .info = &info[flags] }; dyn_cb->type = PLUGIN_CB_MEM_REGULAR; - dyn_cb->rw = rw; - dyn_cb->regular.f.vcpu_mem = cb; - - assert((unsigned)flags < ARRAY_SIZE(info)); - dyn_cb->regular.info = &info[flags]; + dyn_cb->regular = regular_cb; } /* @@ -557,20 +557,20 @@ void qemu_plugin_flush_cb(void) plugin_cb__simple(QEMU_PLUGIN_EV_FLUSH); } -void exec_inline_op(struct qemu_plugin_dyn_cb *cb, int cpu_index) +void exec_inline_op(struct qemu_plugin_inline_cb *cb, int cpu_index) { - char *ptr = cb->inline_insn.entry.score->data->data; + char *ptr = cb->entry.score->data->data; size_t elem_size = g_array_get_element_size( - cb->inline_insn.entry.score->data); - size_t offset = cb->inline_insn.entry.offset; + cb->entry.score->data); + size_t offset = cb->entry.offset; uint64_t *val = (uint64_t *)(ptr + offset + cpu_index * elem_size); - switch (cb->inline_insn.op) { + switch (cb->op) { case QEMU_PLUGIN_INLINE_ADD_U64: - *val += cb->inline_insn.imm; + *val += cb->imm; break; case QEMU_PLUGIN_INLINE_STORE_U64: - *val = cb->inline_insn.imm; + *val = cb->imm; break; default: g_assert_not_reached(); @@ -590,17 +590,19 @@ void qemu_plugin_vcpu_mem_cb(CPUState *cpu, uint64_t vaddr, struct qemu_plugin_dyn_cb *cb = &g_array_index(arr, struct qemu_plugin_dyn_cb, i); - if (!(rw & cb->rw)) { - break; - } switch (cb->type) { case PLUGIN_CB_MEM_REGULAR: - cb->regular.f.vcpu_mem(cpu->cpu_index, make_plugin_meminfo(oi, rw), - vaddr, cb->userp); + if (rw && cb->regular.rw) { + cb->regular.f.vcpu_mem(cpu->cpu_index, + make_plugin_meminfo(oi, rw), + vaddr, cb->regular.userp); + } break; case PLUGIN_CB_INLINE_ADD_U64: case PLUGIN_CB_INLINE_STORE_U64: - exec_inline_op(cb, cpu->cpu_index); + if (rw && cb->inline_insn.rw) { + exec_inline_op(&cb->inline_insn, cpu->cpu_index); + } break; default: g_assert_not_reached();