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[82.218.84.190]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5cbb629d5besm4217341a12.33.2024.10.29.13.59.34 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Tue, 29 Oct 2024 13:59:36 -0700 (PDT) From: Phil Dennis-Jordan To: qemu-devel@nongnu.org Cc: agraf@csgraf.de, phil@philjordan.eu, peter.maydell@linaro.org, pbonzini@redhat.com, rad@semihalf.com, quic_llindhol@quicinc.com, marcin.juszkiewicz@linaro.org, stefanha@redhat.com, mst@redhat.com, slp@redhat.com, richard.henderson@linaro.org, eduardo@habkost.net, marcel.apfelbaum@gmail.com, gaosong@loongson.cn, jiaxun.yang@flygoat.com, chenhuacai@kernel.org, kwolf@redhat.com, hreitz@redhat.com, philmd@linaro.org, shorne@gmail.com, palmer@dabbelt.com, alistair.francis@wdc.com, bmeng.cn@gmail.com, liwei1518@gmail.com, dbarboza@ventanamicro.com, zhiwei_liu@linux.alibaba.com, jcmvbkbc@gmail.com, marcandre.lureau@redhat.com, berrange@redhat.com, akihiko.odaki@daynix.com, qemu-arm@nongnu.org, qemu-block@nongnu.org, qemu-riscv@nongnu.org, Alexander Graf Subject: [PATCH v5 13/15] hw/vmapple/virtio-blk: Add support for apple virtio-blk Date: Tue, 29 Oct 2024 21:58:17 +0100 Message-Id: <20241029205819.69888-14-phil@philjordan.eu> X-Mailer: git-send-email 2.39.3 (Apple Git-145) In-Reply-To: <20241029205819.69888-1-phil@philjordan.eu> References: <20241029205819.69888-1-phil@philjordan.eu> MIME-Version: 1.0 Received-SPF: neutral client-ip=2a00:1450:4864:20::533; envelope-from=phil@philjordan.eu; helo=mail-ed1-x533.google.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NEUTRAL=0.779 autolearn=no 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Alexander Graf Apple has its own virtio-blk PCI device ID where it deviates from the official virtio-pci spec slightly: It puts a new "apple type" field at a static offset in config space and introduces a new barrier command. This patch first creates a mechanism for virtio-blk downstream classes to handle unknown commands. It then creates such a downstream class and a new vmapple-virtio-blk-pci class which support the additional apple type config identifier as well as the barrier command. It then exposes 2 subclasses from that that we can use to expose root and aux virtio-blk devices: "vmapple-virtio-root" and "vmapple-virtio-aux". Signed-off-by: Alexander Graf Signed-off-by: Phil Dennis-Jordan --- v4: * Use recommended object type declaration pattern. * Correctly log unimplemented code paths. * Most header code moved to .c, type name #defines moved to vmapple.h v5: * Corrected handling of potentially unaligned writes to virtio config area. * Simplified passing through device variant type to subobject. hw/block/virtio-blk.c | 19 ++- hw/vmapple/Kconfig | 3 + hw/vmapple/meson.build | 1 + hw/vmapple/virtio-blk.c | 226 +++++++++++++++++++++++++++++++++ include/hw/pci/pci_ids.h | 1 + include/hw/virtio/virtio-blk.h | 12 +- include/hw/vmapple/vmapple.h | 4 + 7 files changed, 261 insertions(+), 5 deletions(-) create mode 100644 hw/vmapple/virtio-blk.c diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index 9166d7974d4..9e8337bb639 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -50,12 +50,12 @@ static void virtio_blk_init_request(VirtIOBlock *s, VirtQueue *vq, req->mr_next = NULL; } -static void virtio_blk_free_request(VirtIOBlockReq *req) +void virtio_blk_free_request(VirtIOBlockReq *req) { g_free(req); } -static void virtio_blk_req_complete(VirtIOBlockReq *req, unsigned char status) +void virtio_blk_req_complete(VirtIOBlockReq *req, unsigned char status) { VirtIOBlock *s = req->dev; VirtIODevice *vdev = VIRTIO_DEVICE(s); @@ -966,8 +966,18 @@ static int virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb) break; } default: - virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP); - virtio_blk_free_request(req); + { + /* + * Give subclasses a chance to handle unknown requests. This way the + * class lookup is not in the hot path. + */ + VirtIOBlkClass *vbk = VIRTIO_BLK_GET_CLASS(s); + if (!vbk->handle_unknown_request || + !vbk->handle_unknown_request(req, mrb, type)) { + virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP); + virtio_blk_free_request(req); + } + } } return 0; } @@ -2044,6 +2054,7 @@ static const TypeInfo virtio_blk_info = { .instance_size = sizeof(VirtIOBlock), .instance_init = virtio_blk_instance_init, .class_init = virtio_blk_class_init, + .class_size = sizeof(VirtIOBlkClass), }; static void virtio_register_types(void) diff --git a/hw/vmapple/Kconfig b/hw/vmapple/Kconfig index 8bbeb9a9237..bcd1be63e3c 100644 --- a/hw/vmapple/Kconfig +++ b/hw/vmapple/Kconfig @@ -7,3 +7,6 @@ config VMAPPLE_BDIF config VMAPPLE_CFG bool +config VMAPPLE_VIRTIO_BLK + bool + diff --git a/hw/vmapple/meson.build b/hw/vmapple/meson.build index 64b78693a31..bf17cf906c9 100644 --- a/hw/vmapple/meson.build +++ b/hw/vmapple/meson.build @@ -1,3 +1,4 @@ system_ss.add(when: 'CONFIG_VMAPPLE_AES', if_true: files('aes.c')) system_ss.add(when: 'CONFIG_VMAPPLE_BDIF', if_true: files('bdif.c')) system_ss.add(when: 'CONFIG_VMAPPLE_CFG', if_true: files('cfg.c')) +system_ss.add(when: 'CONFIG_VMAPPLE_VIRTIO_BLK', if_true: files('virtio-blk.c')) diff --git a/hw/vmapple/virtio-blk.c b/hw/vmapple/virtio-blk.c new file mode 100644 index 00000000000..1652151ec9c --- /dev/null +++ b/hw/vmapple/virtio-blk.c @@ -0,0 +1,226 @@ +/* + * VMApple specific VirtIO Block implementation + * + * Copyright © 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + * SPDX-License-Identifier: GPL-2.0-or-later + * + * VMApple uses almost standard VirtIO Block, but with a few key differences: + * + * - Different PCI device/vendor ID + * - An additional "type" identifier to differentiate AUX and Root volumes + * - An additional BARRIER command + */ + +#include "qemu/osdep.h" +#include "hw/vmapple/vmapple.h" +#include "hw/virtio/virtio-blk.h" +#include "hw/virtio/virtio-pci.h" +#include "qemu/bswap.h" +#include "qemu/log.h" +#include "qemu/module.h" +#include "qapi/error.h" + +OBJECT_DECLARE_TYPE(VMAppleVirtIOBlk, VMAppleVirtIOBlkClass, VMAPPLE_VIRTIO_BLK) + +typedef struct VMAppleVirtIOBlkClass { + VirtIOBlkClass parent; + + void (*get_config)(VirtIODevice *vdev, uint8_t *config); +} VMAppleVirtIOBlkClass; + +typedef struct VMAppleVirtIOBlk { + VirtIOBlock parent_obj; + + uint32_t apple_type; +} VMAppleVirtIOBlk; + +/* + * vmapple-virtio-blk-pci: This extends VirtioPCIProxy. + */ +#define TYPE_VMAPPLE_VIRTIO_BLK_PCI "vmapple-virtio-blk-pci-base" +OBJECT_DECLARE_SIMPLE_TYPE(VMAppleVirtIOBlkPCI, VMAPPLE_VIRTIO_BLK_PCI) + +#define VIRTIO_BLK_T_APPLE_BARRIER 0x10000 + +#define VIRTIO_APPLE_TYPE_ROOT 1 +#define VIRTIO_APPLE_TYPE_AUX 2 + +static bool vmapple_virtio_blk_handle_unknown_request(VirtIOBlockReq *req, + MultiReqBuffer *mrb, + uint32_t type) +{ + switch (type) { + case VIRTIO_BLK_T_APPLE_BARRIER: + qemu_log_mask(LOG_UNIMP, "%s: Barrier requests are currently no-ops\n", + __func__); + virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); + virtio_blk_free_request(req); + return true; + default: + return false; + } +} + +/* + * VMApple virtio-blk uses the same config format as normal virtio, with one + * exception: It adds an "apple type" specififer at the same location that + * the spec reserves for max_secure_erase_sectors. Let's hook into the + * get_config code path here, run it as usual and then patch in the apple type. + */ +static void vmapple_virtio_blk_get_config(VirtIODevice *vdev, uint8_t *config) +{ + VMAppleVirtIOBlk *dev = VMAPPLE_VIRTIO_BLK(vdev); + VMAppleVirtIOBlkClass *vvbk = VMAPPLE_VIRTIO_BLK_GET_CLASS(dev); + struct virtio_blk_config *blkcfg = (struct virtio_blk_config *)config; + + vvbk->get_config(vdev, config); + + g_assert(dev->parent_obj.config_size >= endof(struct virtio_blk_config, zoned)); + + /* Apple abuses the field for max_secure_erase_sectors as type id */ + stl_he_p(&blkcfg->max_secure_erase_sectors, dev->apple_type); +} + +static void vmapple_virtio_blk_class_init(ObjectClass *klass, void *data) +{ + VirtIOBlkClass *vbk = VIRTIO_BLK_CLASS(klass); + VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); + VMAppleVirtIOBlkClass *vvbk = VMAPPLE_VIRTIO_BLK_CLASS(klass); + + vbk->handle_unknown_request = vmapple_virtio_blk_handle_unknown_request; + vvbk->get_config = vdc->get_config; + vdc->get_config = vmapple_virtio_blk_get_config; +} + +static const TypeInfo vmapple_virtio_blk_info = { + .name = TYPE_VMAPPLE_VIRTIO_BLK, + .parent = TYPE_VIRTIO_BLK, + .instance_size = sizeof(VMAppleVirtIOBlk), + .class_init = vmapple_virtio_blk_class_init, +}; + +/* PCI Devices */ + +struct VMAppleVirtIOBlkPCI { + VirtIOPCIProxy parent_obj; + VMAppleVirtIOBlk vdev; + uint32_t apple_type; +}; + + +static Property vmapple_virtio_blk_pci_properties[] = { + DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), + DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, + VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), + DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, + DEV_NVECTORS_UNSPECIFIED), + DEFINE_PROP_END_OF_LIST(), +}; + +static void vmapple_virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) +{ + VMAppleVirtIOBlkPCI *dev = VMAPPLE_VIRTIO_BLK_PCI(vpci_dev); + DeviceState *vdev = DEVICE(&dev->vdev); + VirtIOBlkConf *conf = &dev->vdev.parent_obj.conf; + + if (conf->num_queues == VIRTIO_BLK_AUTO_NUM_QUEUES) { + conf->num_queues = virtio_pci_optimal_num_queues(0); + } + + if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { + vpci_dev->nvectors = conf->num_queues + 1; + } + + /* + * We don't support zones, but we need the additional config space size. + * Let's just expose the feature so the rest of the virtio-blk logic + * allocates enough space for us. The guest will ignore zones anyway. + */ + virtio_add_feature(&dev->vdev.parent_obj.host_features, VIRTIO_BLK_F_ZONED); + /* Propagate the apple type down to the virtio-blk device */ + dev->vdev.apple_type = dev->apple_type; + /* and spawn the virtio-blk device */ + qdev_realize(vdev, BUS(&vpci_dev->bus), errp); + + /* + * The virtio-pci machinery adjusts its vendor/device ID based on whether + * we support modern or legacy virtio. Let's patch it back to the Apple + * identifiers here. + */ + pci_config_set_vendor_id(vpci_dev->pci_dev.config, PCI_VENDOR_ID_APPLE); + pci_config_set_device_id(vpci_dev->pci_dev.config, + PCI_DEVICE_ID_APPLE_VIRTIO_BLK); +} + +static void vmapple_virtio_blk_pci_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); + PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); + + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); + device_class_set_props(dc, vmapple_virtio_blk_pci_properties); + k->realize = vmapple_virtio_blk_pci_realize; + pcidev_k->vendor_id = PCI_VENDOR_ID_APPLE; + pcidev_k->device_id = PCI_DEVICE_ID_APPLE_VIRTIO_BLK; + pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; + pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; +} + +static void vmapple_virtio_blk_pci_instance_init(Object *obj) +{ + VMAppleVirtIOBlkPCI *dev = VMAPPLE_VIRTIO_BLK_PCI(obj); + + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VMAPPLE_VIRTIO_BLK); +} + +static const VirtioPCIDeviceTypeInfo vmapple_virtio_blk_pci_info = { + .base_name = TYPE_VMAPPLE_VIRTIO_BLK_PCI, + .generic_name = "vmapple-virtio-blk-pci", + .instance_size = sizeof(VMAppleVirtIOBlkPCI), + .instance_init = vmapple_virtio_blk_pci_instance_init, + .class_init = vmapple_virtio_blk_pci_class_init, +}; + +static void vmapple_virtio_root_instance_init(Object *obj) +{ + VMAppleVirtIOBlkPCI *dev = VMAPPLE_VIRTIO_BLK_PCI(obj); + + dev->apple_type = VIRTIO_APPLE_TYPE_ROOT; +} + +static const TypeInfo vmapple_virtio_root_info = { + .name = TYPE_VMAPPLE_VIRTIO_ROOT, + .parent = "vmapple-virtio-blk-pci", + .instance_size = sizeof(VMAppleVirtIOBlkPCI), + .instance_init = vmapple_virtio_root_instance_init, +}; + +static void vmapple_virtio_aux_instance_init(Object *obj) +{ + VMAppleVirtIOBlkPCI *dev = VMAPPLE_VIRTIO_BLK_PCI(obj); + + dev->apple_type = VIRTIO_APPLE_TYPE_AUX; +} + +static const TypeInfo vmapple_virtio_aux_info = { + .name = TYPE_VMAPPLE_VIRTIO_AUX, + .parent = "vmapple-virtio-blk-pci", + .instance_size = sizeof(VMAppleVirtIOBlkPCI), + .instance_init = vmapple_virtio_aux_instance_init, +}; + +static void vmapple_virtio_blk_register_types(void) +{ + type_register_static(&vmapple_virtio_blk_info); + virtio_pci_types_register(&vmapple_virtio_blk_pci_info); + type_register_static(&vmapple_virtio_root_info); + type_register_static(&vmapple_virtio_aux_info); +} + +type_init(vmapple_virtio_blk_register_types) diff --git a/include/hw/pci/pci_ids.h b/include/hw/pci/pci_ids.h index f1a53fea8d6..33e2898be95 100644 --- a/include/hw/pci/pci_ids.h +++ b/include/hw/pci/pci_ids.h @@ -191,6 +191,7 @@ #define PCI_DEVICE_ID_APPLE_UNI_N_AGP 0x0020 #define PCI_DEVICE_ID_APPLE_U3_AGP 0x004b #define PCI_DEVICE_ID_APPLE_UNI_N_GMAC 0x0021 +#define PCI_DEVICE_ID_APPLE_VIRTIO_BLK 0x1a00 #define PCI_VENDOR_ID_SUN 0x108e #define PCI_DEVICE_ID_SUN_EBUS 0x1000 diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h index 5c14110c4b1..28d5046ea6c 100644 --- a/include/hw/virtio/virtio-blk.h +++ b/include/hw/virtio/virtio-blk.h @@ -24,7 +24,7 @@ #include "qapi/qapi-types-virtio.h" #define TYPE_VIRTIO_BLK "virtio-blk-device" -OBJECT_DECLARE_SIMPLE_TYPE(VirtIOBlock, VIRTIO_BLK) +OBJECT_DECLARE_TYPE(VirtIOBlock, VirtIOBlkClass, VIRTIO_BLK) /* This is the last element of the write scatter-gather list */ struct virtio_blk_inhdr @@ -100,6 +100,16 @@ typedef struct MultiReqBuffer { bool is_write; } MultiReqBuffer; +typedef struct VirtIOBlkClass { + /*< private >*/ + VirtioDeviceClass parent; + /*< public >*/ + bool (*handle_unknown_request)(VirtIOBlockReq *req, MultiReqBuffer *mrb, + uint32_t type); +} VirtIOBlkClass; + void virtio_blk_handle_vq(VirtIOBlock *s, VirtQueue *vq); +void virtio_blk_free_request(VirtIOBlockReq *req); +void virtio_blk_req_complete(VirtIOBlockReq *req, unsigned char status); #endif diff --git a/include/hw/vmapple/vmapple.h b/include/hw/vmapple/vmapple.h index 3bba59f5ec7..b20956e1286 100644 --- a/include/hw/vmapple/vmapple.h +++ b/include/hw/vmapple/vmapple.h @@ -18,4 +18,8 @@ #define TYPE_VMAPPLE_CFG "vmapple-cfg" +#define TYPE_VMAPPLE_VIRTIO_BLK "vmapple-virtio-blk" +#define TYPE_VMAPPLE_VIRTIO_ROOT "vmapple-virtio-root" +#define TYPE_VMAPPLE_VIRTIO_AUX "vmapple-virtio-aux" + #endif /* HW_VMAPPLE_VMAPPLE_H */