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Tue, 9 Mar 2021 20:28:16 +0000 From: Aaron Lindsay To: qemu-devel@nongnu.org, Peter Maydell , =?utf-8?q?Alex_Benn=C3=A9e?= Cc: cota@braap.org, richard.henderson@linaro.org, Aaron Lindsay Subject: [PATCH v2] plugins: Expose physical addresses instead of device offsets Date: Tue, 9 Mar 2021 15:28:02 -0500 Message-Id: <20210309202802.211756-1-aaron@os.amperecomputing.com> X-Mailer: git-send-email 2.30.1 X-Originating-IP: [68.73.113.219] X-ClientProxiedBy: BL1PR13CA0237.namprd13.prod.outlook.com (2603:10b6:208:2bf::32) To SN6PR01MB4304.prod.exchangelabs.com (2603:10b6:805:a6::23) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from strawberry.localdomain (68.73.113.219) by BL1PR13CA0237.namprd13.prod.outlook.com (2603:10b6:208:2bf::32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3933.13 via Frontend Transport; Tue, 9 Mar 2021 20:28:15 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 32f1e072-d03c-4632-ac8d-08d8e339de82 X-MS-TrafficTypeDiagnostic: SN6PR01MB3791: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8273; 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envelope-from=aaron@os.amperecomputing.com; helo=NAM04-DM6-obe.outbound.protection.outlook.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This allows plugins to query for full virtual-to-physical address translation for a given `qemu_plugin_hwaddr` and stops exposing the offset within the device itself. As this change breaks the API, QEMU_PLUGIN_VERSION is incremented. Signed-off-by: Aaron Lindsay --- contrib/plugins/hotpages.c | 2 +- contrib/plugins/hwprofile.c | 2 +- include/qemu/qemu-plugin.h | 32 +++++++++++++++++++++++++------- plugins/api.c | 17 ++++++++++++----- 4 files changed, 39 insertions(+), 14 deletions(-) diff --git a/contrib/plugins/hotpages.c b/contrib/plugins/hotpages.c index eacc678eac..bf53267532 100644 --- a/contrib/plugins/hotpages.c +++ b/contrib/plugins/hotpages.c @@ -122,7 +122,7 @@ static void vcpu_haddr(unsigned int cpu_index, qemu_plugin_meminfo_t meminfo, } } else { if (hwaddr && !qemu_plugin_hwaddr_is_io(hwaddr)) { - page = (uint64_t) qemu_plugin_hwaddr_device_offset(hwaddr); + page = (uint64_t) qemu_plugin_hwaddr_phys_addr(hwaddr); } else { page = vaddr; } diff --git a/contrib/plugins/hwprofile.c b/contrib/plugins/hwprofile.c index 6dac1d5f85..faf216ac00 100644 --- a/contrib/plugins/hwprofile.c +++ b/contrib/plugins/hwprofile.c @@ -201,7 +201,7 @@ static void vcpu_haddr(unsigned int cpu_index, qemu_plugin_meminfo_t meminfo, return; } else { const char *name = qemu_plugin_hwaddr_device_name(hwaddr); - uint64_t off = qemu_plugin_hwaddr_device_offset(hwaddr); + uint64_t off = qemu_plugin_hwaddr_phys_addr(hwaddr); bool is_write = qemu_plugin_mem_is_store(meminfo); DeviceCounts *counts; diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h index c66507fe8f..3303dce862 100644 --- a/include/qemu/qemu-plugin.h +++ b/include/qemu/qemu-plugin.h @@ -47,7 +47,7 @@ typedef uint64_t qemu_plugin_id_t; extern QEMU_PLUGIN_EXPORT int qemu_plugin_version; -#define QEMU_PLUGIN_VERSION 0 +#define QEMU_PLUGIN_VERSION 1 typedef struct { /* string describing architecture */ @@ -307,8 +307,8 @@ bool qemu_plugin_mem_is_sign_extended(qemu_plugin_meminfo_t info); bool qemu_plugin_mem_is_big_endian(qemu_plugin_meminfo_t info); bool qemu_plugin_mem_is_store(qemu_plugin_meminfo_t info); -/* - * qemu_plugin_get_hwaddr(): +/** + * qemu_plugin_get_hwaddr() - return handle for memory operation * @vaddr: the virtual address of the memory operation * * For system emulation returns a qemu_plugin_hwaddr handle to query @@ -323,12 +323,30 @@ struct qemu_plugin_hwaddr *qemu_plugin_get_hwaddr(qemu_plugin_meminfo_t info, uint64_t vaddr); /* - * The following additional queries can be run on the hwaddr structure - * to return information about it. For non-IO accesses the device - * offset will be into the appropriate block of RAM. + * The following additional queries can be run on the hwaddr structure to + * return information about it - namely whether it is for an IO access and the + * physical address associated with the access. + */ + +/** + * qemu_plugin_hwaddr_is_io() - query whether memory operation is IO + * @haddr: address handle from qemu_plugin_get_hwaddr() + * + * Returns true if the handle's memory operation is to memory-mapped IO, or + * false if it is to RAM */ bool qemu_plugin_hwaddr_is_io(const struct qemu_plugin_hwaddr *haddr); -uint64_t qemu_plugin_hwaddr_device_offset(const struct qemu_plugin_hwaddr *haddr); + +/** + * qemu_plugin_hwaddr_phys_addr() - query physical address for memory operation + * @haddr: address handle from qemu_plugin_get_hwaddr() + * + * Returns the physical address associated with the memory operation + * + * Note that the returned physical address may not be unique if you are dealing + * with multiple address spaces. + */ +uint64_t qemu_plugin_hwaddr_phys_addr(const struct qemu_plugin_hwaddr *haddr); /* * Returns a string representing the device. The string is valid for diff --git a/plugins/api.c b/plugins/api.c index 0b04380d57..3c7dc406e3 100644 --- a/plugins/api.c +++ b/plugins/api.c @@ -40,6 +40,7 @@ #include "sysemu/sysemu.h" #include "tcg/tcg.h" #include "exec/exec-all.h" +#include "exec/ram_addr.h" #include "disas/disas.h" #include "plugin.h" #ifndef CONFIG_USER_ONLY @@ -298,19 +299,25 @@ bool qemu_plugin_hwaddr_is_io(const struct qemu_plugin_hwaddr *haddr) #endif } -uint64_t qemu_plugin_hwaddr_device_offset(const struct qemu_plugin_hwaddr *haddr) +uint64_t qemu_plugin_hwaddr_phys_addr(const struct qemu_plugin_hwaddr *haddr) { #ifdef CONFIG_SOFTMMU if (haddr) { if (!haddr->is_io) { - ram_addr_t ram_addr = qemu_ram_addr_from_host((void *) haddr->v.ram.hostaddr); - if (ram_addr == RAM_ADDR_INVALID) { + RAMBlock *block; + ram_addr_t offset; + void *hostaddr = (void *) haddr->v.ram.hostaddr; + + block = qemu_ram_block_from_host(hostaddr, false, &offset); + if (!block) { error_report("Bad ram pointer %"PRIx64"", haddr->v.ram.hostaddr); abort(); } - return ram_addr; + + return block->offset + offset + block->mr->addr; } else { - return haddr->v.io.offset; + MemoryRegionSection *mrs = haddr->v.io.section; + return haddr->v.io.offset + mrs->mr->addr; } } #endif