From patchwork Thu Oct 17 13:15:29 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Alex_Benn=C3=A9e?= X-Patchwork-Id: 1178601 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.b="Efwjq8f0"; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 46v95406T5z9sPJ for ; Fri, 18 Oct 2019 00:30:00 +1100 (AEDT) Received: from localhost ([::1]:47666 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iL5qn-0006ya-GN for incoming@patchwork.ozlabs.org; Thu, 17 Oct 2019 09:29:57 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33920) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iL5dh-00082b-Gt for qemu-devel@nongnu.org; Thu, 17 Oct 2019 09:16:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iL5df-0005Px-JD for qemu-devel@nongnu.org; Thu, 17 Oct 2019 09:16:25 -0400 Received: from mail-wr1-x444.google.com ([2a00:1450:4864:20::444]:43486) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1iL5df-0005P6-9r for qemu-devel@nongnu.org; Thu, 17 Oct 2019 09:16:23 -0400 Received: by mail-wr1-x444.google.com with SMTP id j18so2299754wrq.10 for ; Thu, 17 Oct 2019 06:16:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=1K5R87gH+RKq1gBcfzruUhBEbc4LEOKl5E0k+gGHnl8=; b=Efwjq8f0c2DIJJXvD72ATIyCNpaWymKuB1m7wRUfG2rucjej40Et1QRYm5HdJTR7Nl lnWmTn3qs0EyWFnhrk1HYigdvKZDmT/zHwuFMGWhJo6RZuETwXZXrK9MHTaEmIH/AkWv HOGBjrdEnyLFoCVlxuTggIzVzQunC5zKoJmZ9Q2C+m1bfh86hNazOTbKb27mzfClb6k0 UDr/QGPXGfc3tB/ZTIK+Ysa8RdvFcyVgkvz0fI46m7KEu6c5heEPolzPZtyjCnxV4B9s mL9rJhkaiE0BJuuhOrttjMNfTSb6mfAsEg8ksrsWusQZ5Mp3iP0gMpjqTWOR6eufbrZ1 Fepw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=1K5R87gH+RKq1gBcfzruUhBEbc4LEOKl5E0k+gGHnl8=; b=BPymHttejEBmnEczK3op6MdiHlKR1yrpEjEvJua8zYVIucE/X6hlSYxpvFuJXXqmYS +qYhR5Pb8mwYHygdUUMXakkzX0BSzVeQtqpbnxzmRtwAG8EZhsWPP15Wlqxvi0csDzfX S9Bv95RzZN98dw6Rqx0I5Xe7iLSidlNWWSZHZTZ6TL1odcMeVxrJ1FHTMP+ifqGgryw7 isXeRQvIKwOqkblclkc9UALtQYKRHrlQqiIBVuSsZOc+WtONglWbNwtpusuyr2Z2dRSo 2hUa3m2+6mNQbAJhOxoErQ3Xtv4SFKp/euIHhw8RnxjJ25exGUXdskw/04mUD7IVLQZv K0sA== X-Gm-Message-State: APjAAAVWLRBGFfTm5+JNIsRv3ZH9mLPxs8AWl6srgJPor1cHk/by/dlS o5xvlOrckkxpGvvdlsx3WgZ67Q== X-Google-Smtp-Source: APXvYqwAuisyZI0/oJy07wVtyDN11z/Fq9cTYoGxPWGcc7Ob2cJo951pignm3X0JSHsy4rqyvV1u4A== X-Received: by 2002:adf:ee81:: with SMTP id b1mr2770255wro.58.1571318182052; Thu, 17 Oct 2019 06:16:22 -0700 (PDT) Received: from zen.linaroharston ([51.148.130.216]) by smtp.gmail.com with ESMTPSA id c4sm2063264wru.31.2019.10.17.06.16.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Oct 2019 06:16:19 -0700 (PDT) Received: from zen.lan (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id 9948A1FF98; Thu, 17 Oct 2019 14:16:16 +0100 (BST) From: =?utf-8?q?Alex_Benn=C3=A9e?= To: qemu-devel@nongnu.org Subject: [PATCH v6 08/54] plugin: add implementation of the api Date: Thu, 17 Oct 2019 14:15:29 +0100 Message-Id: <20191017131615.19660-9-alex.bennee@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191017131615.19660-1-alex.bennee@linaro.org> References: <20191017131615.19660-1-alex.bennee@linaro.org> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::444 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: robert.foley@futurewei.com, Richard Henderson , peter.puhov@futurewei.com, aaron@os.amperecomputing.com, cota@braap.org, =?utf-8?q?Alex_Benn?= =?utf-8?b?w6ll?= Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" [AJB: split from the core code commit] Signed-off-by: Alex Bennée Reviewed-by: Richard Henderson --- v4 - add qemu_plugin_ram_addr_from_host - remove _haddr api calls v5 - remove stray #if 0 v6 - drop hwaddr queries from initial api (in later patch) --- include/qemu/qemu-plugin.h | 3 - plugins/Makefile.objs | 1 + plugins/api.c | 277 +++++++++++++++++++++++++++++++++++++ 3 files changed, 278 insertions(+), 3 deletions(-) create mode 100644 plugins/api.c diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h index d9c1ca3b4c..b9a4a4b684 100644 --- a/include/qemu/qemu-plugin.h +++ b/include/qemu/qemu-plugin.h @@ -285,9 +285,6 @@ bool qemu_plugin_mem_is_store(qemu_plugin_meminfo_t info); struct qemu_plugin_hwaddr *qemu_plugin_get_hwaddr(qemu_plugin_meminfo_t info, uint64_t vaddr); -bool qemu_plugin_hwaddr_is_io(struct qemu_plugin_hwaddr *hwaddr); -uint64_t qemu_plugin_hwaddr_to_raddr(const struct qemu_plugin_hwaddr *haddr); - typedef void (*qemu_plugin_vcpu_mem_cb_t)(unsigned int vcpu_index, qemu_plugin_meminfo_t info, uint64_t vaddr, diff --git a/plugins/Makefile.objs b/plugins/Makefile.objs index 58940335bc..95baabf3d2 100644 --- a/plugins/Makefile.objs +++ b/plugins/Makefile.objs @@ -4,3 +4,4 @@ obj-y += loader.o obj-y += core.o +obj-y += api.o diff --git a/plugins/api.c b/plugins/api.c new file mode 100644 index 0000000000..facf2a132d --- /dev/null +++ b/plugins/api.c @@ -0,0 +1,277 @@ +/* + * QEMU Plugin API + * + * This provides the API that is available to the plugins to interact + * with QEMU. We have to be careful not to expose internal details of + * how QEMU works so we abstract out things like translation and + * instructions to anonymous data types: + * + * qemu_plugin_tb + * qemu_plugin_insn + * + * Which can then be passed back into the API to do additional things. + * As such all the public functions in here are exported in + * qemu-plugin.h. + * + * The general life-cycle of a plugin is: + * + * - plugin is loaded, public qemu_plugin_install called + * - the install func registers callbacks for events + * - usually an atexit_cb is registered to dump info at the end + * - when a registered event occurs the plugin is called + * - some events pass additional info + * - during translation the plugin can decide to instrument any + * instruction + * - when QEMU exits all the registered atexit callbacks are called + * + * Copyright (C) 2017, Emilio G. Cota + * Copyright (C) 2019, Linaro + * + * License: GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + * SPDX-License-Identifier: GPL-2.0-or-later + * + */ + +#include "qemu/osdep.h" +#include "qemu/plugin.h" +#include "cpu.h" +#include "sysemu/sysemu.h" +#include "tcg/tcg.h" +#include "trace/mem-internal.h" /* mem_info macros */ +#include "plugin.h" +#ifndef CONFIG_USER_ONLY +#include "hw/boards.h" +#endif + +/* Uninstall and Reset handlers */ + +void qemu_plugin_uninstall(qemu_plugin_id_t id, qemu_plugin_simple_cb_t cb) +{ + plugin_reset_uninstall(id, cb, false); +} + +void qemu_plugin_reset(qemu_plugin_id_t id, qemu_plugin_simple_cb_t cb) +{ + plugin_reset_uninstall(id, cb, true); +} + +/* + * Plugin Register Functions + * + * This allows the plugin to register callbacks for various events + * during the translation. + */ + +void qemu_plugin_register_vcpu_init_cb(qemu_plugin_id_t id, + qemu_plugin_vcpu_simple_cb_t cb) +{ + plugin_register_cb(id, QEMU_PLUGIN_EV_VCPU_INIT, cb); +} + +void qemu_plugin_register_vcpu_exit_cb(qemu_plugin_id_t id, + qemu_plugin_vcpu_simple_cb_t cb) +{ + plugin_register_cb(id, QEMU_PLUGIN_EV_VCPU_EXIT, cb); +} + +void qemu_plugin_register_vcpu_tb_exec_cb(struct qemu_plugin_tb *tb, + qemu_plugin_vcpu_udata_cb_t cb, + enum qemu_plugin_cb_flags flags, + void *udata) +{ + plugin_register_dyn_cb__udata(&tb->cbs[PLUGIN_CB_REGULAR], + cb, flags, udata); +} + +void qemu_plugin_register_vcpu_tb_exec_inline(struct qemu_plugin_tb *tb, + enum qemu_plugin_op op, + void *ptr, uint64_t imm) +{ + plugin_register_inline_op(&tb->cbs[PLUGIN_CB_INLINE], 0, op, ptr, imm); +} + +void qemu_plugin_register_vcpu_insn_exec_cb(struct qemu_plugin_insn *insn, + qemu_plugin_vcpu_udata_cb_t cb, + enum qemu_plugin_cb_flags flags, + void *udata) +{ + plugin_register_dyn_cb__udata(&insn->cbs[PLUGIN_CB_INSN][PLUGIN_CB_REGULAR], + cb, flags, udata); +} + +void qemu_plugin_register_vcpu_insn_exec_inline(struct qemu_plugin_insn *insn, + enum qemu_plugin_op op, + void *ptr, uint64_t imm) +{ + plugin_register_inline_op(&insn->cbs[PLUGIN_CB_INSN][PLUGIN_CB_INLINE], + 0, op, ptr, imm); +} + + + +void qemu_plugin_register_vcpu_mem_cb(struct qemu_plugin_insn *insn, + qemu_plugin_vcpu_mem_cb_t cb, + enum qemu_plugin_cb_flags flags, + enum qemu_plugin_mem_rw rw, + void *udata) +{ + plugin_register_vcpu_mem_cb(&insn->cbs[PLUGIN_CB_MEM][PLUGIN_CB_REGULAR], + cb, flags, rw, udata); +} + +void qemu_plugin_register_vcpu_mem_inline(struct qemu_plugin_insn *insn, + enum qemu_plugin_mem_rw rw, + enum qemu_plugin_op op, void *ptr, + uint64_t imm) +{ + plugin_register_inline_op(&insn->cbs[PLUGIN_CB_MEM][PLUGIN_CB_INLINE], + rw, op, ptr, imm); +} + +void qemu_plugin_register_vcpu_tb_trans_cb(qemu_plugin_id_t id, + qemu_plugin_vcpu_tb_trans_cb_t cb) +{ + plugin_register_cb(id, QEMU_PLUGIN_EV_VCPU_TB_TRANS, cb); +} + +void qemu_plugin_register_vcpu_syscall_cb(qemu_plugin_id_t id, + qemu_plugin_vcpu_syscall_cb_t cb) +{ + plugin_register_cb(id, QEMU_PLUGIN_EV_VCPU_SYSCALL, cb); +} + +void +qemu_plugin_register_vcpu_syscall_ret_cb(qemu_plugin_id_t id, + qemu_plugin_vcpu_syscall_ret_cb_t cb) +{ + plugin_register_cb(id, QEMU_PLUGIN_EV_VCPU_SYSCALL_RET, cb); +} + +/* + * Plugin Queries + * + * These are queries that the plugin can make to gauge information + * from our opaque data types. We do not want to leak internal details + * here just information useful to the plugin. + */ + +/* + * Translation block information: + * + * A plugin can query the virtual address of the start of the block + * and the number of instructions in it. It can also get access to + * each translated instruction. + */ + +size_t qemu_plugin_tb_n_insns(const struct qemu_plugin_tb *tb) +{ + return tb->n; +} + +uint64_t qemu_plugin_tb_vaddr(const struct qemu_plugin_tb *tb) +{ + return tb->vaddr; +} + +struct qemu_plugin_insn * +qemu_plugin_tb_get_insn(const struct qemu_plugin_tb *tb, size_t idx) +{ + if (unlikely(idx >= tb->n)) { + return NULL; + } + return g_ptr_array_index(tb->insns, idx); +} + +/* + * Instruction information + * + * These queries allow the plugin to retrieve information about each + * instruction being translated. + */ + +const void *qemu_plugin_insn_data(const struct qemu_plugin_insn *insn) +{ + return insn->data->data; +} + +size_t qemu_plugin_insn_size(const struct qemu_plugin_insn *insn) +{ + return insn->data->len; +} + +uint64_t qemu_plugin_insn_vaddr(const struct qemu_plugin_insn *insn) +{ + return insn->vaddr; +} + +void *qemu_plugin_insn_haddr(const struct qemu_plugin_insn *insn) +{ + return insn->haddr; +} + +/* + * The memory queries allow the plugin to query information about a + * memory access. + */ + +unsigned qemu_plugin_mem_size_shift(qemu_plugin_meminfo_t info) +{ + return info & TRACE_MEM_SZ_SHIFT_MASK; +} + +bool qemu_plugin_mem_is_sign_extended(qemu_plugin_meminfo_t info) +{ + return !!(info & TRACE_MEM_SE); +} + +bool qemu_plugin_mem_is_big_endian(qemu_plugin_meminfo_t info) +{ + return !!(info & TRACE_MEM_BE); +} + +bool qemu_plugin_mem_is_store(qemu_plugin_meminfo_t info) +{ + return !!(info & TRACE_MEM_ST); +} + +/* + * Virtual Memory queries + */ + +struct qemu_plugin_hwaddr *qemu_plugin_get_hwaddr(qemu_plugin_meminfo_t info, + uint64_t vaddr) +{ + return NULL; +} + +/* + * Queries to the number and potential maximum number of vCPUs there + * will be. This helps the plugin dimension per-vcpu arrays. + */ + +#ifndef CONFIG_USER_ONLY +static MachineState * get_ms(void) +{ + return MACHINE(qdev_get_machine()); +} +#endif + +int qemu_plugin_n_vcpus(void) +{ +#ifdef CONFIG_USER_ONLY + return -1; +#else + return get_ms()->smp.cpus; +#endif +} + +int qemu_plugin_n_max_vcpus(void) +{ +#ifdef CONFIG_USER_ONLY + return -1; +#else + return get_ms()->smp.max_cpus; +#endif +}