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Wed, 19 Feb 2020 16:10:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1582128607; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=l/r/1AWPRa0yO7eBl0fnS9tdiCEMSa1nH6cRdCVb/1Q=; b=gH6VuhycuBId2Bhjat1PP+WPkVzHMyLVOTlnVHt53+UDTHm/IzrU861qewcmGQMyMSjbu5 HP0tp29vkSUQhq2rmKXfiGWXw5WJlSjxAHhIKqsf5GaFhgIrTo59pZ5LrKQQ7o8cU6uY/U Bph7tuqNmaavneslu0iX19tjhS7CNEM= From: Igor Mammedov To: qemu-devel@nongnu.org Subject: [PATCH v6 04/79] machine: introduce convenience MachineState::ram Date: Wed, 19 Feb 2020 11:08:38 -0500 Message-Id: <20200219160953.13771-5-imammedo@redhat.com> In-Reply-To: <20200219160953.13771-1-imammedo@redhat.com> References: <20200219160953.13771-1-imammedo@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-MC-Unique: ILWhX0ydMhKv2RQFAOZfVA-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.120 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: pasic@linux.ibm.com, Paolo Bonzini , ehabkost@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" the new field will be used by boards to get access to main RAM memory region and will help to save boiler plate in boards which often introduce a field or variable just for this purpose. Memory region will be equivalent to what currently used memory_region_allocate_system_memory() is returning apart from that it will come from hostmem backend. Followup patches will incrementally switch boards to using RAM from MachineState::ram. Patch takes care of non-NUMA case and follow up patch will initialize MachineState::ram for NUMA case. Signed-off-by: Igor Mammedov Reviewed-by: Richard Henderson --- CC: ehabkost@redhat.com CC: pbonzini@redhat.com CC: pasic@linux.ibm.com --- include/hw/boards.h | 12 +++++++++++- hw/core/machine.c | 24 ++++++++++++++++++++++++ hw/core/numa.c | 14 +------------- 3 files changed, 36 insertions(+), 14 deletions(-) diff --git a/include/hw/boards.h b/include/hw/boards.h index 8e536cafb2..ae2b60fb5e 100644 --- a/include/hw/boards.h +++ b/include/hw/boards.h @@ -73,7 +73,12 @@ void machine_set_cpu_numa_node(MachineState *machine, Error **errp); =20 void machine_class_allow_dynamic_sysbus_dev(MachineClass *mc, const char *= type); - +/* + * Checks that backend isn't used, preps it for exclusive usage and + * returns migratable MemoryRegion provided by backend. + */ +MemoryRegion *machine_consume_memdev(MachineState *machine, + HostMemoryBackend *backend); =20 /** * CPUArchId: @@ -295,6 +300,11 @@ struct MachineState { bool enable_graphics; char *memory_encryption; char *ram_memdev_id; + /* + * convenience alias to ram_memdev_id backend memory region + * or to numa container memory region + */ + MemoryRegion *ram; DeviceMemoryState *device_memory; =20 ram_addr_t ram_size; diff --git a/hw/core/machine.c b/hw/core/machine.c index 1a6e485c87..c8d361b710 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -26,6 +26,7 @@ #include "sysemu/qtest.h" #include "hw/pci/pci.h" #include "hw/mem/nvdimm.h" +#include "migration/vmstate.h" =20 GlobalProperty hw_compat_4_2[] =3D { { "virtio-blk-device", "x-enable-wce-if-config-wce", "off" }, @@ -1059,10 +1060,33 @@ static void machine_numa_finish_cpu_init(MachineSta= te *machine) g_string_free(s, true); } =20 +MemoryRegion *machine_consume_memdev(MachineState *machine, + HostMemoryBackend *backend) +{ + MemoryRegion *ret =3D host_memory_backend_get_memory(backend); + + if (memory_region_is_mapped(ret)) { + char *path =3D object_get_canonical_path_component(OBJECT(backend)= ); + error_report("memory backend %s can't be used multiple times.", pa= th); + g_free(path); + exit(EXIT_FAILURE); + } + host_memory_backend_set_mapped(backend, true); + vmstate_register_ram_global(ret); + return ret; +} + void machine_run_board_init(MachineState *machine) { MachineClass *machine_class =3D MACHINE_GET_CLASS(machine); =20 + if (machine->ram_memdev_id) { + Object *o; + o =3D object_resolve_path_type(machine->ram_memdev_id, + TYPE_MEMORY_BACKEND, NULL); + machine->ram =3D machine_consume_memdev(machine, MEMORY_BACKEND(o)= ); + } + if (machine->numa_state) { numa_complete_configuration(machine); if (machine->numa_state->num_nodes) { diff --git a/hw/core/numa.c b/hw/core/numa.c index 840e68581f..8264336209 100644 --- a/hw/core/numa.c +++ b/hw/core/numa.c @@ -817,20 +817,8 @@ void memory_region_allocate_system_memory(MemoryRegion= *mr, Object *owner, if (!backend) { continue; } - MemoryRegion *seg =3D host_memory_backend_get_memory(backend); - - if (memory_region_is_mapped(seg)) { - char *path =3D object_get_canonical_path_component(OBJECT(back= end)); - error_report("memory backend %s is used multiple times. Each " - "-numa option must use a different memdev value.", - path); - g_free(path); - exit(1); - } - - host_memory_backend_set_mapped(backend, true); + MemoryRegion *seg =3D machine_consume_memdev(ms, backend); memory_region_add_subregion(mr, addr, seg); - vmstate_register_ram_global(seg); addr +=3D size; } } --=20 2.18.1