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([102.35.208.160]) by smtp.gmail.com with ESMTPSA id cc19-20020a5d5c13000000b0033b728190c1sm8550261wrb.79.2024.02.13.01.40.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Feb 2024 01:40:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1707817259; x=1708422059; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=hcoN95NgjKvlQ9/9phTtzGHXlAEFGIlm3GnYnG6dWRc=; b=py1Ih5CuSprOCGf2O5+wOKHv3aU4Z/BfoBGGDfP9cLnYJVStoZYz0xZnjRyEETW138 41l9BFS1x8Ber320jJgNTBkAGDdk7yaHuXOUZmcy31Yf6xzcfC8joBXg/o3VIU6xoddt a/vXUrG49ui18ssEBkxxrja4auZ+aUb7S2HnvpS1DR7ck+BCrHVIMVU7hoNaraM8icJy do5eSzNcViW8UW4/HDuwQcLZPKAL9WuM4QrvuY9ZlaEbhonzhPEO23UZ1MUCTqDkqiC5 D+gyuJDVEM5onf2R0U+8KztdBrisGqKiUeXxLMqiD7gABfqBN3e5QO5gvCLMQqH/eQcq mMRA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1707817259; x=1708422059; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=hcoN95NgjKvlQ9/9phTtzGHXlAEFGIlm3GnYnG6dWRc=; b=RNRpFM9yNAT+Qkpr6WCYK/iVK6c5ZSXnzJSxRMGPCo/jeYdu6Yc2hnYTY5AToAQfzw HzSTuBdc5bkrrnT3L6ccSP7Q9GURyefiT/WjqtH/kp26OteP6xpvoJUkme7yxINQDGN/ XpjXAS1hUse3Dqg+HalGXJKkBUbi69IK/NQcFeWaxletuzRV7FEOqpEPlo/ks2PotIg+ GBlwplwExVfvQLFf2y3IUxzM1yVX2vvNWAnmzaDv4RmQaiPMsCsU5fZw8rn0Fgjiavd+ NtuQntOsUHFU5VsYOsLPTn+oNmhbSpfLGQnQQUL2JpRT3qtTfoe2DSi7Z1wCSbffke5t UJ/g== X-Gm-Message-State: AOJu0Yy0O9GDoVv6B11UUnNFEeV6S7GYbwZlfB+wmLBt0ErQR1rsTSs5 A1MO8HuJpIZUBW15rxD1pzBhlBIw3tc4O1ByoAOVPQxb0IFtwaCZ5XIDECpStyIbMLePtq0Djg3 Z X-Google-Smtp-Source: AGHT+IFvctnXzSsYVGzDmggSZF2VPj5cbZMIJR3Htmhd/SqEHZoOB+Pg1Lqnm/87L0kVx4u9/hxwdA== X-Received: by 2002:a5d:4384:0:b0:33b:65a7:6b87 with SMTP id i4-20020a5d4384000000b0033b65a76b87mr6422656wrq.49.1707817259312; Tue, 13 Feb 2024 01:40:59 -0800 (PST) X-Forwarded-Encrypted: i=1; AJvYcCVGg47e7vB/EmBY0Eskvjl545d1z/BEKtEMg72hfOWeZWkl/PS/sRJxk1Bq0Bhom7W2kX1E0he2QEbLppTKSqbYYuDWwc06R9x7qb9GJ8/SE7S5E82jmCuq74fdr0dKegTD5Wy2d7/988+QKL/Bd3RiDtcc2paou7Bv4ZdsmS5ECkZ0IVREy6KhOU3SgBt25b+Ln2yH6t8d/o2ptGJS/hxZEOuZYmBSrigEJvrKJRSrekmBWXLY0EBNrBmUf5SM0E32smnQpyVLZrIeHu9g6ylt+F8ipEZ6oMCxOQNsFzjdc3WFeMq4tWuZuW2HOKZp6MYu5M+OdC9me2uVG021Ne2cu4vZgg== From: Pierrick Bouvier To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Alex=20Benn=C3=A9e?= , Yanan Wang , Marcel Apfelbaum , Paolo Bonzini , Mahmoud Mandour , Pierrick Bouvier , Alexandre Iooss , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Eduardo Habkost , Richard Henderson Subject: [PATCH v4 08/18] plugins: implement inline operation relative to cpu_index Date: Tue, 13 Feb 2024 13:39:58 +0400 Message-ID: <20240213094009.150349-9-pierrick.bouvier@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240213094009.150349-1-pierrick.bouvier@linaro.org> References: <20240213094009.150349-1-pierrick.bouvier@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::433; envelope-from=pierrick.bouvier@linaro.org; helo=mail-wr1-x433.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, T_SCC_BODY_TEXT_LINE=-0.01 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1707817378970100007 Content-Type: text/plain; charset="utf-8" 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 Signed-off-by: Pierrick Bouvier --- plugins/plugin.h | 2 +- accel/tcg/plugin-gen.c | 69 ++++++++++++++++++++++++++++++++++-------- plugins/api.c | 3 +- plugins/core.c | 12 +++++--- 4 files changed, 67 insertions(+), 19 deletions(-) diff --git a/plugins/plugin.h b/plugins/plugin.h index 043c740067d..3bf1aaf5c2d 100644 --- a/plugins/plugin.h +++ b/plugins/plugin.h @@ -99,7 +99,7 @@ void plugin_register_vcpu_mem_cb(GArray **arr, enum qemu_plugin_mem_rw rw, void *udata); =20 -void exec_inline_op(struct qemu_plugin_dyn_cb *cb); +void exec_inline_op(struct qemu_plugin_dyn_cb *cb, int cpu_index); =20 int plugin_num_vcpus(void); =20 diff --git a/accel/tcg/plugin-gen.c b/accel/tcg/plugin-gen.c index b37ce7683e6..c15627c5e47 100644 --- a/accel/tcg/plugin-gen.c +++ b/accel/tcg/plugin-gen.c @@ -132,16 +132,28 @@ static void gen_empty_udata_cb_no_rwg(void) */ static void gen_empty_inline_cb(void) { + TCGv_i32 cpu_index =3D tcg_temp_ebb_new_i32(); + TCGv_ptr cpu_index_as_ptr =3D tcg_temp_ebb_new_ptr(); TCGv_i64 val =3D tcg_temp_ebb_new_i64(); TCGv_ptr ptr =3D tcg_temp_ebb_new_ptr(); =20 + tcg_gen_ld_i32(cpu_index, tcg_env, + -offsetof(ArchCPU, env) + offsetof(CPUState, cpu_index)= ); + /* second operand will be replaced by immediate value */ + tcg_gen_mul_i32(cpu_index, cpu_index, cpu_index); + tcg_gen_ext_i32_ptr(cpu_index_as_ptr, cpu_index); + tcg_gen_movi_ptr(ptr, 0); + tcg_gen_add_ptr(ptr, ptr, cpu_index_as_ptr); tcg_gen_ld_i64(val, ptr, 0); - /* pass an immediate !=3D 0 so that it doesn't get optimized away */ - tcg_gen_addi_i64(val, val, 0xdeadface); + /* second operand will be replaced by immediate value */ + tcg_gen_add_i64(val, val, val); + tcg_gen_st_i64(val, ptr, 0); tcg_temp_free_ptr(ptr); tcg_temp_free_i64(val); + tcg_temp_free_ptr(cpu_index_as_ptr); + tcg_temp_free_i32(cpu_index); } =20 static void gen_empty_mem_cb(TCGv_i64 addr, uint32_t info) @@ -289,12 +301,37 @@ static TCGOp *copy_const_ptr(TCGOp **begin_op, TCGOp = *op, void *ptr) return op; } =20 +static TCGOp *copy_ld_i32(TCGOp **begin_op, TCGOp *op) +{ + return copy_op(begin_op, op, INDEX_op_ld_i32); +} + +static TCGOp *copy_ext_i32_ptr(TCGOp **begin_op, TCGOp *op) +{ + if (UINTPTR_MAX =3D=3D UINT32_MAX) { + op =3D copy_op(begin_op, op, INDEX_op_mov_i32); + } else { + op =3D copy_op(begin_op, op, INDEX_op_ext_i32_i64); + } + return op; +} + +static TCGOp *copy_add_ptr(TCGOp **begin_op, TCGOp *op) +{ + if (UINTPTR_MAX =3D=3D UINT32_MAX) { + op =3D copy_op(begin_op, op, INDEX_op_add_i32); + } else { + op =3D copy_op(begin_op, op, INDEX_op_add_i64); + } + return op; +} + static TCGOp *copy_ld_i64(TCGOp **begin_op, TCGOp *op) { if (TCG_TARGET_REG_BITS =3D=3D 32) { /* 2x ld_i32 */ - op =3D copy_op(begin_op, op, INDEX_op_ld_i32); - op =3D copy_op(begin_op, op, INDEX_op_ld_i32); + op =3D copy_ld_i32(begin_op, op); + op =3D copy_ld_i32(begin_op, op); } else { /* ld_i64 */ op =3D copy_op(begin_op, op, INDEX_op_ld_i64); @@ -330,6 +367,13 @@ static TCGOp *copy_add_i64(TCGOp **begin_op, TCGOp *op= , uint64_t v) return op; } =20 +static TCGOp *copy_mul_i32(TCGOp **begin_op, TCGOp *op, uint32_t v) +{ + op =3D copy_op(begin_op, op, INDEX_op_mul_i32); + op->args[2] =3D tcgv_i32_arg(tcg_constant_i32(v)); + return op; +} + static TCGOp *copy_st_ptr(TCGOp **begin_op, TCGOp *op) { if (UINTPTR_MAX =3D=3D UINT32_MAX) { @@ -395,18 +439,17 @@ static TCGOp *append_inline_cb(const struct qemu_plug= in_dyn_cb *cb, TCGOp *begin_op, TCGOp *op, int *unused) { - /* const_ptr */ - op =3D copy_const_ptr(&begin_op, op, cb->userp); - - /* ld_i64 */ + char *ptr =3D cb->userp; + size_t elem_size =3D 0; + size_t offset =3D 0; + op =3D copy_ld_i32(&begin_op, op); + op =3D copy_mul_i32(&begin_op, op, elem_size); + op =3D copy_ext_i32_ptr(&begin_op, op); + op =3D copy_const_ptr(&begin_op, op, ptr + offset); + op =3D copy_add_ptr(&begin_op, op); op =3D copy_ld_i64(&begin_op, op); - - /* add_i64 */ op =3D copy_add_i64(&begin_op, op, cb->inline_insn.imm); - - /* st_i64 */ op =3D copy_st_i64(&begin_op, op); - return op; } =20 diff --git a/plugins/api.c b/plugins/api.c index 15edad6769b..dedcbdfd30d 100644 --- a/plugins/api.c +++ b/plugins/api.c @@ -106,7 +106,8 @@ void qemu_plugin_register_vcpu_tb_exec_inline(struct qe= mu_plugin_tb *tb, void *ptr, uint64_t imm) { if (!tb->mem_only) { - plugin_register_inline_op(&tb->cbs[PLUGIN_CB_INLINE], 0, op, ptr, = imm); + plugin_register_inline_op(&tb->cbs[PLUGIN_CB_INLINE], + 0, op, ptr, imm); } } =20 diff --git a/plugins/core.c b/plugins/core.c index cd0c717e291..5984bc2568c 100644 --- a/plugins/core.c +++ b/plugins/core.c @@ -312,7 +312,8 @@ static struct qemu_plugin_dyn_cb *plugin_get_dyn_cb(GAr= ray **arr) =20 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; @@ -468,9 +469,12 @@ void qemu_plugin_flush_cb(void) plugin_cb__simple(QEMU_PLUGIN_EV_FLUSH); } =20 -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 =3D cb->userp; + char *ptr =3D cb->userp; + size_t elem_size =3D 0; + size_t offset =3D 0; + uint64_t *val =3D (uint64_t *)(ptr + offset + cpu_index * elem_size); =20 switch (cb->inline_insn.op) { case QEMU_PLUGIN_INLINE_ADD_U64: @@ -503,7 +507,7 @@ void qemu_plugin_vcpu_mem_cb(CPUState *cpu, uint64_t va= ddr, 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(); --=20 2.43.0