Pull UML updates from Richard Weinberger: - Support for optimized routines based on the host CPU - Support for PCI via virtio - Various fixes * tag 'for-linus-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: um: remove unneeded semicolon in um_arch.c um: Remove the repeated declaration um: fix error return code in winch_tramp() um: fix error return code in slip_open() um: Fix stack pointer alignment um: implement flush_cache_vmap/flush_cache_vunmap um: add a UML specific futex implementation um: enable the use of optimized xor routines in UML um: Add support for host CPU flags and alignment um: allow not setting extra rpaths in the linux binary um: virtio/pci: enable suspend/resume um: add PCI over virtio emulation driver um: irqs: allow invoking time-travel handler multiple times um: time-travel/signals: fix ndelay() in interrupt um: expose time-travel mode to userspace side um: export signals_enabled directly um: remove unused smp_sigio_handler() declaration lib: add iomem emulation (logic_iomem) um: allow disabling NO_IOMEM
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| 1 | +/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */ | |
| 2 | +/* | |
| 3 | + * Copyright (C) 2021 Intel Corporation | |
| 4 | + * Author: Johannes Berg <johannes@sipsolutions.net> | |
| 5 | + */ | |
| 6 | +#ifndef _UAPI_LINUX_VIRTIO_PCIDEV_H | |
| 7 | +#define _UAPI_LINUX_VIRTIO_PCIDEV_H | |
| 8 | +#include <linux/types.h> | |
| 9 | + | |
| 10 | +/** | |
| 11 | + * enum virtio_pcidev_ops - virtual PCI device operations | |
| 12 | + * @VIRTIO_PCIDEV_OP_CFG_READ: read config space, size is 1, 2, 4 or 8; | |
| 13 | + * the @data field should be filled in by the device (in little endian). | |
| 14 | + * @VIRTIO_PCIDEV_OP_CFG_WRITE: write config space, size is 1, 2, 4 or 8; | |
| 15 | + * the @data field contains the data to write (in little endian). | |
| 16 | + * @VIRTIO_PCIDEV_OP_BAR_READ: read BAR mem/pio, size can be variable; | |
| 17 | + * the @data field should be filled in by the device (in little endian). | |
| 18 | + * @VIRTIO_PCIDEV_OP_BAR_WRITE: write BAR mem/pio, size can be variable; | |
| 19 | + * the @data field contains the data to write (in little endian). | |
| 20 | + * @VIRTIO_PCIDEV_OP_MMIO_MEMSET: memset MMIO, size is variable but | |
| 21 | + * the @data field only has one byte (unlike @VIRTIO_PCIDEV_OP_MMIO_WRITE) | |
| 22 | + * @VIRTIO_PCIDEV_OP_INT: legacy INTx# pin interrupt, the addr field is 1-4 for | |
| 23 | + * the number | |
| 24 | + * @VIRTIO_PCIDEV_OP_MSI: MSI(-X) interrupt, this message basically transports | |
| 25 | + * the 16- or 32-bit write that would otherwise be done into memory, | |
| 26 | + * analogous to the write messages (@VIRTIO_PCIDEV_OP_MMIO_WRITE) above | |
| 27 | + * @VIRTIO_PCIDEV_OP_PME: Dummy message whose content is ignored (and should be | |
| 28 | + * all zeroes) to signal the PME# pin. | |
| 29 | + */ | |
| 30 | +enum virtio_pcidev_ops { | |
| 31 | + VIRTIO_PCIDEV_OP_RESERVED = 0, | |
| 32 | + VIRTIO_PCIDEV_OP_CFG_READ, | |
| 33 | + VIRTIO_PCIDEV_OP_CFG_WRITE, | |
| 34 | + VIRTIO_PCIDEV_OP_MMIO_READ, | |
| 35 | + VIRTIO_PCIDEV_OP_MMIO_WRITE, | |
| 36 | + VIRTIO_PCIDEV_OP_MMIO_MEMSET, | |
| 37 | + VIRTIO_PCIDEV_OP_INT, | |
| 38 | + VIRTIO_PCIDEV_OP_MSI, | |
| 39 | + VIRTIO_PCIDEV_OP_PME, | |
| 40 | +}; | |
| 41 | + | |
| 42 | +/** | |
| 43 | + * struct virtio_pcidev_msg - virtio PCI device operation | |
| 44 | + * @op: the operation to do | |
| 45 | + * @bar: the bar (only with BAR read/write messages) | |
| 46 | + * @reserved: reserved | |
| 47 | + * @size: the size of the read/write (in bytes) | |
| 48 | + * @addr: the address to read/write | |
| 49 | + * @data: the data, normally @size long, but just one byte for | |
| 50 | + * %VIRTIO_PCIDEV_OP_MMIO_MEMSET | |
| 51 | + * | |
| 52 | + * Note: the fields are all in native (CPU) endian, however, the | |
| 53 | + * @data values will often be in little endian (see the ops above.) | |
| 54 | + */ | |
| 55 | +struct virtio_pcidev_msg { | |
| 56 | + __u8 op; | |
| 57 | + __u8 bar; | |
| 58 | + __u16 reserved; | |
| 59 | + __u32 size; | |
| 60 | + __u64 addr; | |
| 61 | + __u8 data[]; | |
| 62 | +}; | |
| 63 | + | |
| 64 | +#endif /* _UAPI_LINUX_VIRTIO_PCIDEV_H */ | |