From patchwork Tue May 21 10:56:33 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: 1937360 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=b+kijK/5; 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 4VkBH46pvRz1ynR for ; Tue, 21 May 2024 20:57:52 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1s9NB1-000094-81; Tue, 21 May 2024 06:57:03 -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 1s9NAv-00006R-9z; Tue, 21 May 2024 06:56:57 -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 1s9NAs-0008In-SM; Tue, 21 May 2024 06:56:57 -0400 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 723B1CE0F0B; Tue, 21 May 2024 10:56:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1484DC32786; Tue, 21 May 2024 10:56:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1716289010; bh=28t7Fg5B6krxDtsXGakeNIyt+SyVFB/V4qTfbcdgegE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b+kijK/5NwxHq37VHxPk9CnFTZzTKVXAJTF0nlXAHUWo3pDYn0Kv3AzOW4KQ17iCv jLT9X90Lqhy/xg3HMyD2vsE0SepnZWtoMpVs0DPfOeSE/MzsS6k2vtoZELb/hBrJ7p XrPDXqlXTHWNNO21N7e0vlfpz1B7018EVSayHWoViIwa5Jy+TeAENNwb3AA6PPDAcI hOeegx3IY6jK41Bol65ERNckXqyGoVAYSPad88yeKLo2R//4LHrgzRcyc+K2qLSstg tNGTEcfKvPxP0HnKSUt0+EN91iga0y97ycp+pXfwWLXa91Ng00AiKs/7uMfBW5A4TA pf/NJijogxEmA== 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 , Atish Patra , Atish Patra Cc: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Sunil V L , Santosh Mamila , Chethan Seshadri , Sivakumar Munnangi Subject: [PATCH v2 1/3] hw/riscv/virt: Add memory hotplugging and virtio-md-pci support Date: Tue, 21 May 2024 12:56:33 +0200 Message-Id: <20240521105635.795211-2-bjorn@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240521105635.795211-1-bjorn@kernel.org> References: <20240521105635.795211-1-bjorn@kernel.org> 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: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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 (virtio-mem/virtio-pmem) allows for dynamic resizing of virtual machine memory, and requires proper hotplugging (add/remove) support to work. Add device memory support for RISC-V "virt" machine, and enable virtio-md-pci with the corresponding missing hotplugging callbacks. Signed-off-by: Björn Töpel --- hw/riscv/Kconfig | 2 + hw/riscv/virt.c | 83 +++++++++++++++++++++++++++++++++++++++++- hw/virtio/virtio-mem.c | 5 ++- 3 files changed, 87 insertions(+), 3 deletions(-) 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.c b/hw/riscv/virt.c index 4fdb66052587..443902f919d2 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) { @@ -1420,6 +1423,12 @@ static void virt_machine_init(MachineState *machine) exit(1); } + if (machine->ram_slots > ACPI_MAX_RAM_SLOTS) { + error_report("unsupported amount of memory slots: %"PRIu64, + machine->ram_slots); + exit(EXIT_FAILURE); + } + /* Initialize sockets */ mmio_irqchip = virtio_irqchip = pcie_irqchip = NULL; for (i = 0; i < socket_count; i++) { @@ -1553,6 +1562,37 @@ static void virt_machine_init(MachineState *machine) memory_region_add_subregion(system_memory, memmap[VIRT_MROM].base, mask_rom); + /* device memory */ + device_memory_base = ROUND_UP(s->memmap[VIRT_DRAM].base + machine->ram_size, + GiB); + device_memory_size = machine->maxram_size - machine->ram_size; + if (device_memory_size > 0) { + /* + * Each DIMM is aligned based on the backend's alignment value. + * Assume max 1G hugepage alignment per slot. + */ + device_memory_size += machine->ram_slots * GiB; + + 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_base + device_memory_size < device_memory_size) { + error_report("unsupported amount of device memory"); + exit(EXIT_FAILURE); + } + + 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 +1752,21 @@ 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 +1784,35 @@ 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 +1835,10 @@ 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..6636e5e1089c 100644 --- a/hw/virtio/virtio-mem.c +++ b/hw/virtio/virtio-mem.c @@ -51,7 +51,8 @@ static uint32_t virtio_mem_default_thp_size(void) { uint32_t default_thp_size = VIRTIO_MEM_MIN_BLOCK_SIZE; -#if defined(__x86_64__) || defined(__arm__) || defined(__powerpc64__) +#if defined(__x86_64__) || defined(__arm__) || defined(__powerpc64__) \ + || defined(__riscv__) default_thp_size = 2 * MiB; #elif defined(__aarch64__) if (qemu_real_host_page_size() == 4 * KiB) { @@ -161,7 +162,7 @@ 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))