qemu/docs/system/devices, branch master

hostmem: add a new memory backend based on POSIX shm_open()

2024-07-03T22:14:06Z

shm_open() creates and opens a new POSIX shared memory object. A POSIX shared memory object allows creating memory backend with an associated file descriptor that can be shared with external processes (e.g. vhost-user). The new `memory-backend-shm` can be used as an alternative when `memory-backend-memfd` is not available (Linux only), since shm_open() should be provided by any POSIX-compliant operating system. This backend mimics memfd, allocating memory that is practically anonymous. In theory shm_open() requires a name, but this is allocated for a short time interval and shm_unlink() is called right after shm_open(). After that, only fd is shared with external processes (e.g., vhost-user) as if it were associated with anonymous memory. In the future we may also allow the user to specify the name to be passed to shm_open(), but for now we keep the backend simple, mimicking anonymous memory such as memfd. Acked-by: David Hildenbrand Acked-by: Stefan Hajnoczi Acked-by: Markus Armbruster (QAPI schema) Signed-off-by: Stefano Garzarella Message-Id: <20240618100519.145853-1-sgarzare@redhat.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin

docs/system/devices/usb: Replace the non-existing "qemu" binary

2024-06-30T16:51:44Z

We don't ship a binary that is simply called "qemu", so we should avoid this in the documentation. Use the configurable binary name via "|qemu_system|" instead. Signed-off-by: Thomas Huth Reviewed-by: Michael Tokarev Signed-off-by: Michael Tokarev

docs/cxl: fix some typos

2024-06-30T16:51:44Z

This patch corrects minor typographical errors to ensure the ASCII art aligns with the explanations provided. Specifically, it fixes an incorrect root port reference and removes redundant words. Signed-off-by: Hyeongtak Ji Signed-off-by: Michael Tokarev

Revert "hw/virtio: Add support for VDPA network simulation devices"

2024-04-09T06:30:18Z

This reverts commit cd341fd1ffded978b2aa0b5309b00be7c42e347c. The patch adds non-upstream code in include/standard-headers/linux/virtio_pci.h which would make maintainance harder. Revert for now. Suggested-by: Jason Wang Message-Id: Acked-by: Jason Wang Signed-off-by: Michael S. Tsirkin

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

2024-03-13T15:11:53Z

virtio,pc,pci: features, cleanups, fixes more memslots support in libvhost-user support PCIe Gen5/Gen6 link speeds in pcie more traces in vdpa network simulation devices support in vdpa SMBIOS type 9 descriptor implementation Bump max_cpus to 4096 vcpus in q35 aw-bits and granule options in VIRTIO-IOMMU Support report NUMA nodes for device memory using GI in acpi Beginning of shutdown event support in pvpanic fixes, cleanups all over the place. Signed-off-by: Michael S. Tsirkin # -----BEGIN PGP SIGNATURE----- # # iQFDBAABCAAtFiEEXQn9CHHI+FuUyooNKB8NuNKNVGkFAmXw0TMPHG1zdEByZWRo # YXQuY29tAAoJECgfDbjSjVRp8x4H+gLMoGwaGAX7gDGPgn2Ix4j/3kO77ZJ9X9k/ # 1KqZu/9eMS1j2Ei+vZqf05w7qRjxxhwDq3ilEXF/+UFqgAehLqpRRB8j5inqvzYt # +jv0DbL11PBp/oFjWcytm5CbiVsvq8KlqCF29VNzc162XdtcduUOWagL96y8lJfZ # uPrOoyeR7SMH9lp3LLLHWgu+9W4nOS03RroZ6Umj40y5B7yR0Rrppz8lMw5AoQtr # 0gMRnFhYXeiW6CXdz+Tzcr7XfvkkYDi/j7ibiNSURLBfOpZa6Y8+kJGKxz5H1K1G # 6ZY4PBcOpQzl+NMrktPHogczgJgOK10t+1i/R3bGZYw2Qn/93Eg= # =C0UU # -----END PGP SIGNATURE----- # gpg: Signature made Tue 12 Mar 2024 22:03:31 GMT # gpg: using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469 # gpg: issuer "mst@redhat.com" # gpg: Good signature from "Michael S. Tsirkin " [full] # gpg: aka "Michael S. Tsirkin " [full] # Primary key fingerprint: 0270 606B 6F3C DF3D 0B17 0970 C350 3912 AFBE 8E67 # Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA 8A0D 281F 0DB8 D28D 5469 * tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu: (68 commits) docs/specs/pvpanic: document shutdown event hw/cxl: Fix missing reserved data in CXL Device DVSEC hmat acpi: Fix out of bounds access due to missing use of indirection hmat acpi: Do not add Memory Proximity Domain Attributes Structure targetting non existent memory. qemu-options.hx: Document the virtio-iommu-pci aw-bits option hw/arm/virt: Set virtio-iommu aw-bits default value to 48 hw/i386/q35: Set virtio-iommu aw-bits default value to 39 virtio-iommu: Add an option to define the input range width virtio-iommu: Trace domain range limits as unsigned int qemu-options.hx: Document the virtio-iommu-pci granule option virtio-iommu: Change the default granule to the host page size virtio-iommu: Add a granule property hw/i386/acpi-build: Add support for SRAT Generic Initiator structures hw/acpi: Implement the SRAT GI affinity structure qom: new object to associate device to NUMA node hw/i386/pc: Inline pc_cmos_init() into pc_cmos_init_late() and remove it hw/i386/pc: Set "normal" boot device order in pc_basic_device_init() hw/i386/pc: Avoid one use of the current_machine global hw/i386/pc: Remove "rtc_state" link again Revert "hw/i386/pc: Confine system flash handling to pc_sysfw" ... Signed-off-by: Peter Maydell # Conflicts: # hw/core/machine.c

hw/virtio: Add support for VDPA network simulation devices

2024-03-12T21:56:55Z

This patch adds support for VDPA network simulation devices. The device is developed based on virtio-net and tap backend, and supports hardware live migration function. For more details, please refer to "docs/system/devices/vdpa-net.rst" Signed-off-by: Hao Chen Message-Id: <20240221073802.2888022-1-chenh@yusur.tech> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin

hw/nvme: Add NVMe NGUID property

2024-03-12T14:48:56Z

This patch adds a way to specify an NGUID for a given NVMe Namespace using a string of hexadecimal digits with an optional '-' separator to group bytes. For instance: -device nvme-ns,nguid="e9accd3b83904e13167cf0593437f57d" If provided, the NGUID will be part of the Namespace Identification Descriptor list and the Identify Namespace data. Signed-off-by: Roque Arcudia Hernandez Signed-off-by: Nabih Estefan Reviewed-by: Klaus Jensen Signed-off-by: Klaus Jensen

docs: correct typos

2024-02-20T19:20:48Z

Correct typos automatically found with the `typos` tool Signed-off-by: Manos Pitsidianakis Reviewed-by: Alex Bennée Acked-by: Michael S. Tsirkin Reviewed-by: Michael Tokarev (mjt: trivial fixup) Signed-off-by: Michael Tokarev

hw/cxl: Standardize all references on CXL r3.1 and minor updates

2024-02-14T11:09:33Z

Previously not all references mentioned any spec version at all. Given r3.1 is the current specification available for evaluation at www.computeexpresslink.org update references to refer to that. Hopefully this won't become a never ending job. A few structure definitions have been updated to add new fields. Defaults of 0 and read only are valid choices for these new DVSEC registers so go with that for now. There are additional error codes and some of the 'questions' in the comments are resolved now. Update documentation reference to point to the CXL r3.1 specification with naming closer to what is on the cover. For cases where there are structure version numbers, add defines so they can be found next to the register definitions. Signed-off-by: Jonathan Cameron Message-Id: <20240126121636.24611-6-Jonathan.Cameron@huawei.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin

docs/system: Add vhost-user-input documentation

2024-02-14T11:09:32Z

This adds basic documentation for vhost-user-input. Signed-off-by: Leo Yan Message-Id: <20231120043721.50555-3-leo.yan@linaro.org> Signed-off-by: Alex Bennée Message-Id: <20240104210945.1223134-10-alex.bennee@linaro.org> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin