From patchwork Tue May 14 11:06:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= X-Patchwork-Id: 1934956 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=LtMOnUnH; dkim-atps=neutral Authentication-Results: legolas.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=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4Vdtq51J7Wz20d6 for ; Tue, 14 May 2024 21:07:13 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1s6pzl-0003zE-UY; Tue, 14 May 2024 07:06:57 -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 1s6pzl-0003yx-1w; Tue, 14 May 2024 07:06:57 -0400 Received: from sin.source.kernel.org ([145.40.73.55]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1s6pzg-0006MU-Dd; Tue, 14 May 2024 07:06:56 -0400 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 00B46CE1263; Tue, 14 May 2024 11:06:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C305DC2BD10; Tue, 14 May 2024 11:06:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1715684796; bh=cA/MfzMlBqNsmC+LsU56F9WV+WXJmciXyeIO+zI4kGY=; h=From:To:Cc:Subject:Date:From; b=LtMOnUnHh8xs6RKE3S2k4drtpnMGHds4BXJ+o0sYShFO3VZ9Ae7MfmVmrYyDdZY4Z TbeYSP7Iwms01H1BQZXh7oWi4wvWxDJqGwVfKQfY+TA3LidERJDTSO4BnDLDWi/+7Q mMxFVj5FlLtZBKgQ8EKec8oGpoqUIlr0crdbhIYeFHDIEscxfFZc520J155LLcl4pr H7lwUkaNWLVp++36XKVmPoylEK3E3qP4qo01evpNGvEhVe36mWa7378znOdwEmS2BS XZ4OuxbU3RO5Iwj2trEUf6kopyrtFHQz99aVv5EmYHR28jnzzAir8sQcFfg7Yc5OcK e5Hw1etekAMlQ== From: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= To: Palmer Dabbelt , Alistair Francis , Bin Meng , Weiwei Li , Daniel Henrique Barboza , Liu Zhiwei , qemu-riscv@nongnu.org, qemu-devel@nongnu.org, David Hildenbrand Cc: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Sunil V L , Santosh Mamila , Chethan Seshadri , Sivakumar Munnangi Subject: [PATCH] hw/riscv/virt: Add hotplugging and virtio-md-pci support Date: Tue, 14 May 2024 13:06:15 +0200 Message-Id: <20240514110615.399065-1-bjorn@kernel.org> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 Received-SPF: pass client-ip=145.40.73.55; envelope-from=bjorn@kernel.org; helo=sin.source.kernel.org X-Spam_score_int: -53 X-Spam_score: -5.4 X-Spam_bar: ----- X-Spam_report: (-5.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.974, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Björn Töpel Virtio-based memory devices allows for dynamic resizing of virtual machine memory, and requires proper hotplugging (add/remove) support to work. Enable virtio-md-pci with the corresponding missing hotplugging callbacks for the RISC-V "virt" machine. Signed-off-by: Björn Töpel --- This is basic support for MHP that works with DT. There some minor ACPI SRAT plumbing in there as well. Ideally we'd like proper ACPI MHP support as well. I have a branch [1], where I've applied this patch, plus ACPI GED/PC-DIMM MHP support on top of Sunil's QEMU branch (contains some ACPI DSDT additions) [2], for the curious/brave ones. However, the ACPI MHP support this is not testable on upstream Linux yet (ACPI AIA support, and ACPI NUMA SRAT series are ongoing). I'll follow-up with proper ACPI GED/PC-DIMM MHP patches, once the dependencies land (Linux kernel and QEMU). I'll post the Linux MHP/virtio-mem v2 patches later this week! Cheers, Björn [1] https://github.com/bjoto/qemu/commits/virtio-mem-pc-dimm-mhp-acpi/ [2] https://lore.kernel.org/linux-riscv/20240501121742.1215792-1-sunilvl@ventanamicro.com/ --- hw/riscv/Kconfig | 2 ++ hw/riscv/virt-acpi-build.c | 7 +++++ hw/riscv/virt.c | 64 +++++++++++++++++++++++++++++++++++++- hw/virtio/virtio-mem.c | 2 +- 4 files changed, 73 insertions(+), 2 deletions(-) base-commit: 9360070196789cc8b9404b2efaf319384e64b107 diff --git a/hw/riscv/Kconfig b/hw/riscv/Kconfig index a2030e3a6ff0..08f82dbb681a 100644 --- a/hw/riscv/Kconfig +++ b/hw/riscv/Kconfig @@ -56,6 +56,8 @@ config RISCV_VIRT select PLATFORM_BUS select ACPI select ACPI_PCI + select VIRTIO_MEM_SUPPORTED + select VIRTIO_PMEM_SUPPORTED config SHAKTI_C bool diff --git a/hw/riscv/virt-acpi-build.c b/hw/riscv/virt-acpi-build.c index 0925528160f8..6dc3baa9ec86 100644 --- a/hw/riscv/virt-acpi-build.c +++ b/hw/riscv/virt-acpi-build.c @@ -610,6 +610,13 @@ build_srat(GArray *table_data, BIOSLinker *linker, RISCVVirtState *vms) } } + if (ms->device_memory) { + build_srat_memory(table_data, ms->device_memory->base, + memory_region_size(&ms->device_memory->mr), + ms->numa_state->num_nodes - 1, + MEM_AFFINITY_HOTPLUGGABLE | MEM_AFFINITY_ENABLED); + } + acpi_table_end(linker, &table); } diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c index 4fdb66052587..16c2bdbfe6b6 100644 --- a/hw/riscv/virt.c +++ b/hw/riscv/virt.c @@ -53,6 +53,8 @@ #include "hw/pci-host/gpex.h" #include "hw/display/ramfb.h" #include "hw/acpi/aml-build.h" +#include "hw/mem/memory-device.h" +#include "hw/virtio/virtio-mem-pci.h" #include "qapi/qapi-visit-common.h" #include "hw/virtio/virtio-iommu.h" @@ -1407,6 +1409,7 @@ static void virt_machine_init(MachineState *machine) DeviceState *mmio_irqchip, *virtio_irqchip, *pcie_irqchip; int i, base_hartid, hart_count; int socket_count = riscv_socket_count(machine); + hwaddr device_memory_base, device_memory_size; /* Check socket count limit */ if (VIRT_SOCKETS_MAX < socket_count) { @@ -1553,6 +1556,25 @@ static void virt_machine_init(MachineState *machine) memory_region_add_subregion(system_memory, memmap[VIRT_MROM].base, mask_rom); + device_memory_base = ROUND_UP(s->memmap[VIRT_DRAM].base + machine->ram_size, + GiB); + device_memory_size = machine->maxram_size - machine->ram_size; + + if (riscv_is_32bit(&s->soc[0])) { + hwaddr memtop = device_memory_base + ROUND_UP(device_memory_size, GiB); + + if (memtop > UINT32_MAX) { + error_report("Memory exceeds 32-bit limit by %lu bytes", + memtop - UINT32_MAX); + exit(EXIT_FAILURE); + } + } + + if (device_memory_size > 0) { + machine_memory_devices_init(machine, device_memory_base, + device_memory_size); + } + /* * Init fw_cfg. Must be done before riscv_load_fdt, otherwise the * device tree cannot be altered and we get FDT_ERR_NOSPACE. @@ -1712,12 +1734,21 @@ static HotplugHandler *virt_machine_get_hotplug_handler(MachineState *machine, MachineClass *mc = MACHINE_GET_CLASS(machine); if (device_is_dynamic_sysbus(mc, dev) || - object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_IOMMU_PCI)) { + object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_IOMMU_PCI) || + object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MD_PCI)) { return HOTPLUG_HANDLER(machine); } return NULL; } +static void virt_machine_device_pre_plug_cb(HotplugHandler *hotplug_dev, + DeviceState *dev, Error **errp) +{ + if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MD_PCI)) { + virtio_md_pci_pre_plug(VIRTIO_MD_PCI(dev), MACHINE(hotplug_dev), errp); + } +} + static void virt_machine_device_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, Error **errp) { @@ -1735,6 +1766,34 @@ static void virt_machine_device_plug_cb(HotplugHandler *hotplug_dev, if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_IOMMU_PCI)) { create_fdt_virtio_iommu(s, pci_get_bdf(PCI_DEVICE(dev))); } + + if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MD_PCI)) { + virtio_md_pci_plug(VIRTIO_MD_PCI(dev), MACHINE(hotplug_dev), errp); + } +} + +static void virt_machine_device_unplug_request_cb(HotplugHandler *hotplug_dev, + DeviceState *dev, + Error **errp) +{ + if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MD_PCI)) { + virtio_md_pci_unplug_request(VIRTIO_MD_PCI(dev), MACHINE(hotplug_dev), + errp); + } else { + error_setg(errp, "device unplug request for unsupported device type: %s", + object_get_typename(OBJECT(dev))); + } +} + +static void virt_machine_device_unplug_cb(HotplugHandler *hotplug_dev, + DeviceState *dev, Error **errp) +{ + if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MD_PCI)) { + virtio_md_pci_unplug(VIRTIO_MD_PCI(dev), MACHINE(hotplug_dev), errp); + } else { + error_setg(errp, "virt: device unplug for unsupported device" + " type: %s", object_get_typename(OBJECT(dev))); + } } static void virt_machine_class_init(ObjectClass *oc, void *data) @@ -1757,7 +1816,10 @@ static void virt_machine_class_init(ObjectClass *oc, void *data) assert(!mc->get_hotplug_handler); mc->get_hotplug_handler = virt_machine_get_hotplug_handler; + hc->pre_plug = virt_machine_device_pre_plug_cb; hc->plug = virt_machine_device_plug_cb; + hc->unplug_request = virt_machine_device_unplug_request_cb; + hc->unplug = virt_machine_device_unplug_cb; machine_class_allow_dynamic_sysbus_dev(mc, TYPE_RAMFB_DEVICE); #ifdef CONFIG_TPM diff --git a/hw/virtio/virtio-mem.c b/hw/virtio/virtio-mem.c index ffd119ebacb7..26c976a3b9b8 100644 --- a/hw/virtio/virtio-mem.c +++ b/hw/virtio/virtio-mem.c @@ -161,7 +161,7 @@ static bool virtio_mem_has_shared_zeropage(RAMBlock *rb) * necessary (as the section size can change). But it's more likely that the * section size will rather get smaller and not bigger over time. */ -#if defined(TARGET_X86_64) || defined(TARGET_I386) +#if defined(TARGET_X86_64) || defined(TARGET_I386) || defined(TARGET_RISCV) #define VIRTIO_MEM_USABLE_EXTENT (2 * (128 * MiB)) #elif defined(TARGET_ARM) #define VIRTIO_MEM_USABLE_EXTENT (2 * (512 * MiB))