From nobody Sun Nov 24 07:41:09 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1725977394; cv=none; d=zohomail.com; s=zohoarc; b=npRLAmYzsVJT9Hi/yl3xzAGfcEOs+1KxIj+v8w8EG8GYiOv7iUkRSLzpYxeag4twEM1WOzHJkoaCWnv54cDs1tXc3k0Kfts1vY8M9sB0uOSaqiau61pxaF2nWSiRiszo1Ulo114tzXZkNxFaousMlL4RpMhAm+Y/LSjZg9XvkV8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1725977394; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=bg1S7MpqFLKynDQMTW/BgVqsjzz9T+4SZvu94a93bN0=; b=K/hiRnT76JZnr/ln/UFqlma4bADKcpCNhGGosnRulKz9JVw2aMH87jxhtj6b/vMvIDhMiRiIXP7XFMkNpeURhTSlI+zcvaz8ztDxPyAk53bmGJUs1521kri7ZjPiD2MKo39mDaUInMlPVTN04PSAAF/NmhKWBCX04cQ+YPpkj0c= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1725977394816186.79808970202043; Tue, 10 Sep 2024 07:09:54 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1so1X5-00084S-HA; Tue, 10 Sep 2024 10:07:51 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1so1X4-0007y5-1U for qemu-devel@nongnu.org; Tue, 10 Sep 2024 10:07:50 -0400 Received: from mail-ed1-x52c.google.com ([2a00:1450:4864:20::52c]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1so1X0-0006XY-Vd for qemu-devel@nongnu.org; Tue, 10 Sep 2024 10:07:49 -0400 Received: by mail-ed1-x52c.google.com with SMTP id 4fb4d7f45d1cf-5c26852af8fso7329944a12.2 for ; Tue, 10 Sep 2024 07:07:46 -0700 (PDT) Received: from draig.lan ([85.9.250.243]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5c3ebd4696asm4311411a12.30.2024.09.10.07.07.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Sep 2024 07:07:42 -0700 (PDT) Received: from draig.lan (localhost [IPv6:::1]) by draig.lan (Postfix) with ESMTP id 31AEF633E6; Tue, 10 Sep 2024 15:07:35 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1725977265; x=1726582065; 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=bg1S7MpqFLKynDQMTW/BgVqsjzz9T+4SZvu94a93bN0=; b=OSGH31h3qkkw7RvVqoDEAkbUyqhE03bXYGqVfczno4PyMCbnuxxQ1lki3CBdB1VNHE ibErBbDaongY04CUvmp/GiJIwQHI/8eaxUOEBnRhszK9r+f8ekIe8Eg9xMbBiOyYvsHm Y7GQsWr02kKAtPHDjR54PqRC2AfwMX/fwhDgimXGeNdiBM1YwaVK1ZEcDXkyESWa+NiO 6pstBrUWTPfTARW3BPhjy9sSDBCe94qsWZbObnyA5ofodaiCIiV4ED1aS6whezrQIvuV 2hDbIbY4sjvpR1MFQe/ssMwa6MFZAzC7GcwKpr/3b8ifVSwjY9NgiTTZPyA1w4YHF4w0 kEAg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1725977265; x=1726582065; 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=bg1S7MpqFLKynDQMTW/BgVqsjzz9T+4SZvu94a93bN0=; b=l8q/9C1YEFAHIBT0V7KSkyNT4OUvGDwrEW6DJ/vqK6At0aWsSB89bHTxnj78GyBTqM c9C9pEIKPWFDvruqz5oudbY28zhdfaX0jHo6XZhOpRK73dF9yb2J72otNla7AR1yk+u6 0E7ABRSkI1o+QfhERNP1pkKPuPWHUcyakFllICqtR9Ixb23l62DtrHzXw1VeWUsyhceK 5/WsavFI+DI+l4TXvoMt+4QEyh3wGGYNKZarhsaW/CvePj3jcudEm4wDAN0tDPWCUDpA HugyQKa0dBsigygxep4mB0/355B6qKZdq7rWS8hQqyTA9jVaP4Ga2jrL1TMwwIohPTN0 p00g== X-Gm-Message-State: AOJu0YxcFSglYMuJLEHyZ/JPJnBhEO5h8abt2iXBpy9xBk7JzppGxxXX mV94MFukR4AvTeiDHteKXKuzj8ZW5DumR1OiTIgKON1LAw6VI+SLh7uElKy0CIY= X-Google-Smtp-Source: AGHT+IEi/0Wc0xg/L10zGHE+wHVRRGYGpIfWYPv8hdMQh0hn+pxd7BZD+gpJ3LXBwtWBKfSQIV8GYA== X-Received: by 2002:a05:6402:5109:b0:5c2:4d9f:61c with SMTP id 4fb4d7f45d1cf-5c3e9533614mr10178504a12.8.1725977265376; Tue, 10 Sep 2024 07:07:45 -0700 (PDT) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Cc: Eduardo Habkost , Zhao Liu , Marcel Apfelbaum , Beraldo Leal , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Alexandre Iooss , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Pierrick Bouvier , Yanan Wang , Peter Maydell , Mahmoud Mandour , Thomas Huth , qemu-arm@nongnu.org, devel@lists.libvirt.org, Jiaxun Yang , Paolo Bonzini , Richard Henderson , Wainer dos Santos Moschetta , Xingtao Yao Subject: [PATCH 15/26] plugins: extend API to get latest memory value accessed Date: Tue, 10 Sep 2024 15:07:22 +0100 Message-Id: <20240910140733.4007719-16-alex.bennee@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240910140733.4007719-1-alex.bennee@linaro.org> References: <20240910140733.4007719-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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::52c; envelope-from=alex.bennee@linaro.org; helo=mail-ed1-x52c.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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1725977396878116600 From: Pierrick Bouvier This value can be accessed only during a memory callback, using new qemu_plugin_mem_get_value function. Returned value can be extended when QEMU will support accesses wider than 128 bits. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1719 Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2152 Reviewed-by: Richard Henderson Reviewed-by: Xingtao Yao Reviewed-by: Alex Benn=C3=A9e Signed-off-by: Pierrick Bouvier Message-Id: <20240724194708.1843704-3-pierrick.bouvier@linaro.org> Signed-off-by: Alex Benn=C3=A9e --- include/qemu/qemu-plugin.h | 32 ++++++++++++++++++++++++++++++++ plugins/api.c | 33 +++++++++++++++++++++++++++++++++ plugins/qemu-plugins.symbols | 1 + 3 files changed, 66 insertions(+) diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h index c71c705b69..649ce89815 100644 --- a/include/qemu/qemu-plugin.h +++ b/include/qemu/qemu-plugin.h @@ -262,6 +262,29 @@ enum qemu_plugin_mem_rw { QEMU_PLUGIN_MEM_RW, }; =20 +enum qemu_plugin_mem_value_type { + QEMU_PLUGIN_MEM_VALUE_U8, + QEMU_PLUGIN_MEM_VALUE_U16, + QEMU_PLUGIN_MEM_VALUE_U32, + QEMU_PLUGIN_MEM_VALUE_U64, + QEMU_PLUGIN_MEM_VALUE_U128, +}; + +/* typedef qemu_plugin_mem_value - value accessed during a load/store */ +typedef struct { + enum qemu_plugin_mem_value_type type; + union { + uint8_t u8; + uint16_t u16; + uint32_t u32; + uint64_t u64; + struct { + uint64_t low; + uint64_t high; + } u128; + } data; +} qemu_plugin_mem_value; + /** * enum qemu_plugin_cond - condition to enable callback * @@ -551,6 +574,15 @@ bool qemu_plugin_mem_is_big_endian(qemu_plugin_meminfo= _t info); QEMU_PLUGIN_API bool qemu_plugin_mem_is_store(qemu_plugin_meminfo_t info); =20 +/** + * qemu_plugin_mem_get_mem_value() - return last value loaded/stored + * @info: opaque memory transaction handle + * + * Returns: memory value + */ +QEMU_PLUGIN_API +qemu_plugin_mem_value qemu_plugin_mem_get_value(qemu_plugin_meminfo_t info= ); + /** * qemu_plugin_get_hwaddr() - return handle for memory operation * @info: opaque memory info structure diff --git a/plugins/api.c b/plugins/api.c index 2ff13d09de..3316d4a04d 100644 --- a/plugins/api.c +++ b/plugins/api.c @@ -351,6 +351,39 @@ bool qemu_plugin_mem_is_store(qemu_plugin_meminfo_t in= fo) return get_plugin_meminfo_rw(info) & QEMU_PLUGIN_MEM_W; } =20 +qemu_plugin_mem_value qemu_plugin_mem_get_value(qemu_plugin_meminfo_t info) +{ + uint64_t low =3D current_cpu->neg.plugin_mem_value_low; + qemu_plugin_mem_value value; + + switch (qemu_plugin_mem_size_shift(info)) { + case 0: + value.type =3D QEMU_PLUGIN_MEM_VALUE_U8; + value.data.u8 =3D (uint8_t)low; + break; + case 1: + value.type =3D QEMU_PLUGIN_MEM_VALUE_U16; + value.data.u16 =3D (uint16_t)low; + break; + case 2: + value.type =3D QEMU_PLUGIN_MEM_VALUE_U32; + value.data.u32 =3D (uint32_t)low; + break; + case 3: + value.type =3D QEMU_PLUGIN_MEM_VALUE_U64; + value.data.u64 =3D low; + break; + case 4: + value.type =3D QEMU_PLUGIN_MEM_VALUE_U128; + value.data.u128.low =3D low; + value.data.u128.high =3D current_cpu->neg.plugin_mem_value_high; + break; + default: + g_assert_not_reached(); + } + return value; +} + /* * Virtual Memory queries */ diff --git a/plugins/qemu-plugins.symbols b/plugins/qemu-plugins.symbols index ca773d8d9f..eed9d8abd9 100644 --- a/plugins/qemu-plugins.symbols +++ b/plugins/qemu-plugins.symbols @@ -13,6 +13,7 @@ qemu_plugin_insn_size; qemu_plugin_insn_symbol; qemu_plugin_insn_vaddr; + qemu_plugin_mem_get_value; qemu_plugin_mem_is_big_endian; qemu_plugin_mem_is_sign_extended; qemu_plugin_mem_is_store; --=20 2.39.2