cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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virtio_config.h (4231B)

      1#ifndef _UAPI_LINUX_VIRTIO_CONFIG_H
      2#define _UAPI_LINUX_VIRTIO_CONFIG_H
      3/* This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so
      4 * anyone can use the definitions to implement compatible drivers/servers.
      5 *
      6 * Redistribution and use in source and binary forms, with or without
      7 * modification, are permitted provided that the following conditions
      8 * are met:
      9 * 1. Redistributions of source code must retain the above copyright
     10 *    notice, this list of conditions and the following disclaimer.
     11 * 2. Redistributions in binary form must reproduce the above copyright
     12 *    notice, this list of conditions and the following disclaimer in the
     13 *    documentation and/or other materials provided with the distribution.
     14 * 3. Neither the name of IBM nor the names of its contributors
     15 *    may be used to endorse or promote products derived from this software
     16 *    without specific prior written permission.
     17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
     18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     20 * ARE DISCLAIMED.  IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
     21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27 * SUCH DAMAGE. */
     28
     29/* Virtio devices use a standardized configuration space to define their
     30 * features and pass configuration information, but each implementation can
     31 * store and access that space differently. */
     32#include <linux/types.h>
     33
     34/* Status byte for guest to report progress, and synchronize features. */
     35/* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */
     36#define VIRTIO_CONFIG_S_ACKNOWLEDGE	1
     37/* We have found a driver for the device. */
     38#define VIRTIO_CONFIG_S_DRIVER		2
     39/* Driver has used its parts of the config, and is happy */
     40#define VIRTIO_CONFIG_S_DRIVER_OK	4
     41/* Driver has finished configuring features */
     42#define VIRTIO_CONFIG_S_FEATURES_OK	8
     43/* Device entered invalid state, driver must reset it */
     44#define VIRTIO_CONFIG_S_NEEDS_RESET	0x40
     45/* We've given up on this device. */
     46#define VIRTIO_CONFIG_S_FAILED		0x80
     47
     48/*
     49 * Virtio feature bits VIRTIO_TRANSPORT_F_START through
     50 * VIRTIO_TRANSPORT_F_END are reserved for the transport
     51 * being used (e.g. virtio_ring, virtio_pci etc.), the
     52 * rest are per-device feature bits.
     53 */
     54#define VIRTIO_TRANSPORT_F_START	28
     55#define VIRTIO_TRANSPORT_F_END		38
     56
     57#ifndef VIRTIO_CONFIG_NO_LEGACY
     58/* Do we get callbacks when the ring is completely used, even if we've
     59 * suppressed them? */
     60#define VIRTIO_F_NOTIFY_ON_EMPTY	24
     61
     62/* Can the device handle any descriptor layout? */
     63#define VIRTIO_F_ANY_LAYOUT		27
     64#endif /* VIRTIO_CONFIG_NO_LEGACY */
     65
     66/* v1.0 compliant. */
     67#define VIRTIO_F_VERSION_1		32
     68
     69/*
     70 * If clear - device has the platform DMA (e.g. IOMMU) bypass quirk feature.
     71 * If set - use platform DMA tools to access the memory.
     72 *
     73 * Note the reverse polarity (compared to most other features),
     74 * this is for compatibility with legacy systems.
     75 */
     76#define VIRTIO_F_ACCESS_PLATFORM	33
     77#ifndef __KERNEL__
     78/* Legacy name for VIRTIO_F_ACCESS_PLATFORM (for compatibility with old userspace) */
     79#define VIRTIO_F_IOMMU_PLATFORM		VIRTIO_F_ACCESS_PLATFORM
     80#endif /* __KERNEL__ */
     81
     82/* This feature indicates support for the packed virtqueue layout. */
     83#define VIRTIO_F_RING_PACKED		34
     84
     85/*
     86 * Inorder feature indicates that all buffers are used by the device
     87 * in the same order in which they have been made available.
     88 */
     89#define VIRTIO_F_IN_ORDER		35
     90
     91/*
     92 * This feature indicates that memory accesses by the driver and the
     93 * device are ordered in a way described by the platform.
     94 */
     95#define VIRTIO_F_ORDER_PLATFORM		36
     96
     97/*
     98 * Does the device support Single Root I/O Virtualization?
     99 */
    100#define VIRTIO_F_SR_IOV			37
    101#endif /* _UAPI_LINUX_VIRTIO_CONFIG_H */