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📄 evtchn.h /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR MIT) / /***************************************************************************** * evtchn.h * * Interface to /dev/xen/evtchn. * * Copyright (c) 2003-2005, K A Fraser * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation; or, when distributed * separately from the Linux kernel or incorporated into other * software packages, subject to the following license: * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this source file (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, copy, modify, * merge, publish, distribute, sublicense, and/or sell copies of the Software, * and to permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. / #ifndef __LINUX_PUBLIC_EVTCHN_H__ #define __LINUX_PUBLIC_EVTCHN_H__ / * Bind a fresh port to VIRQ @virq. * Return allocated port. / #define IOCTL_EVTCHN_BIND_VIRQ \ _IOC(_IOC_NONE, 'E', 0, sizeof(struct ioctl_evtchn_bind_virq)) struct ioctl_evtchn_bind_virq { unsigned int virq; }; / * Bind a fresh port to remote <@remote_domain, @remote_port>. * Return allocated port. / #define IOCTL_EVTCHN_BIND_INTERDOMAIN \ _IOC(_IOC_NONE, 'E', 1, sizeof(struct ioctl_evtchn_bind_interdomain)) struct ioctl_evtchn_bind_interdomain { unsigned int remote_domain, remote_port; }; / * Allocate a fresh port for binding to @remote_domain. * Return allocated port. / #define IOCTL_EVTCHN_BIND_UNBOUND_PORT \ _IOC(_IOC_NONE, 'E', 2, sizeof(struct ioctl_evtchn_bind_unbound_port)) struct ioctl_evtchn_bind_unbound_port { unsigned int remote_domain; }; / * Unbind previously allocated @port. / #define IOCTL_EVTCHN_UNBIND \ _IOC(_IOC_NONE, 'E', 3, sizeof(struct ioctl_evtchn_unbind)) struct ioctl_evtchn_unbind { unsigned int port; }; / * Unbind previously allocated @port. / #define IOCTL_EVTCHN_NOTIFY \ _IOC(_IOC_NONE, 'E', 4, sizeof(struct ioctl_evtchn_notify)) struct ioctl_evtchn_notify { unsigned int port; }; / Clear and reinitialise the event buffer. Clear error condition. / #define IOCTL_EVTCHN_RESET \ _IOC(_IOC_NONE, 'E', 5, 0) / * Restrict this file descriptor so that it can only be used to bind * new interdomain events from one domain. * * Once a file descriptor has been restricted it cannot be * de-restricted, and must be closed and re-opened. Event channels * which were bound before restricting remain bound afterwards, and * can be notified as usual. / #define IOCTL_EVTCHN_RESTRICT_DOMID \ _IOC(_IOC_NONE, 'E', 6, sizeof(struct ioctl_evtchn_restrict_domid)) struct ioctl_evtchn_restrict_domid { domid_t domid; }; #endif / __LINUX_PUBLIC_EVTCHN_H__ */	3.47 KB	2026-03-24 10:01
📄 gntalloc.h /****************************************************************************** * gntalloc.h * * Interface to /dev/xen/gntalloc. * * Author: Daniel De Graaf <dgdegra@tycho.nsa.gov> * * This file is in the public domain. / #ifndef __LINUX_PUBLIC_GNTALLOC_H__ #define __LINUX_PUBLIC_GNTALLOC_H__ #include <linux/types.h> / * Allocates a new page and creates a new grant reference. / #define IOCTL_GNTALLOC_ALLOC_GREF \ _IOC(_IOC_NONE, 'G', 5, sizeof(struct ioctl_gntalloc_alloc_gref)) struct ioctl_gntalloc_alloc_gref { / IN parameters / / The ID of the domain to be given access to the grants. / __u16 domid; / Flags for this mapping / __u16 flags; / Number of pages to map / __u32 count; / OUT parameters / / The offset to be used on a subsequent call to mmap(). / __u64 index; / The grant references of the newly created grant, one per page / / Variable size, depending on count / __u32 gref_ids[1]; }; #define GNTALLOC_FLAG_WRITABLE 1 / * Deallocates the grant reference, allowing the associated page to be freed if * no other domains are using it. / #define IOCTL_GNTALLOC_DEALLOC_GREF \ _IOC(_IOC_NONE, 'G', 6, sizeof(struct ioctl_gntalloc_dealloc_gref)) struct ioctl_gntalloc_dealloc_gref { / IN parameters / / The offset returned in the map operation / __u64 index; / Number of references to unmap / __u32 count; }; / * Sets up an unmap notification within the page, so that the other side can do * cleanup if this side crashes. Required to implement cross-domain robust * mutexes or close notification on communication channels. * * Each mapped page only supports one notification; multiple calls referring to * the same page overwrite the previous notification. You must clear the * notification prior to the IOCTL_GNTALLOC_DEALLOC_GREF if you do not want it * to occur. / #define IOCTL_GNTALLOC_SET_UNMAP_NOTIFY \ _IOC(_IOC_NONE, 'G', 7, sizeof(struct ioctl_gntalloc_unmap_notify)) struct ioctl_gntalloc_unmap_notify { / IN parameters / / Offset in the file descriptor for a byte within the page (same as * used in mmap). If using UNMAP_NOTIFY_CLEAR_BYTE, this is the byte to * be cleared. Otherwise, it can be any byte in the page whose * notification we are adjusting. / __u64 index; / Action(s) to take on unmap / __u32 action; / Event channel to notify / __u32 event_channel_port; }; / Clear (set to zero) the byte specified by index / #define UNMAP_NOTIFY_CLEAR_BYTE 0x1 / Send an interrupt on the indicated event channel / #define UNMAP_NOTIFY_SEND_EVENT 0x2 #endif / __LINUX_PUBLIC_GNTALLOC_H__ */	2.56 KB	2026-03-24 10:01
📄 gntdev.h /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR MIT) / /***************************************************************************** * gntdev.h * * Interface to /dev/xen/gntdev. * * Copyright (c) 2007, D G Murray * Copyright (c) 2018, Oleksandr Andrushchenko, EPAM Systems Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation; or, when distributed * separately from the Linux kernel or incorporated into other * software packages, subject to the following license: * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this source file (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, copy, modify, * merge, publish, distribute, sublicense, and/or sell copies of the Software, * and to permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. / #ifndef __LINUX_PUBLIC_GNTDEV_H__ #define __LINUX_PUBLIC_GNTDEV_H__ #include <linux/types.h> struct ioctl_gntdev_grant_ref { / The domain ID of the grant to be mapped. / __u32 domid; / The grant reference of the grant to be mapped. / __u32 ref; }; / * Inserts the grant references into the mapping table of an instance * of gntdev. N.B. This does not perform the mapping, which is deferred * until mmap() is called with @index as the offset. / #define IOCTL_GNTDEV_MAP_GRANT_REF \ _IOC(_IOC_NONE, 'G', 0, sizeof(struct ioctl_gntdev_map_grant_ref)) struct ioctl_gntdev_map_grant_ref { / IN parameters / / The number of grants to be mapped. / __u32 count; __u32 pad; / OUT parameters / / The offset to be used on a subsequent call to mmap(). / __u64 index; / Variable IN parameter. / / Array of grant references, of size @count. / struct ioctl_gntdev_grant_ref refs[1]; }; / * Removes the grant references from the mapping table of an instance of * gntdev. N.B. munmap() must be called on the relevant virtual address(es) * before this ioctl is called, or an error will result. / #define IOCTL_GNTDEV_UNMAP_GRANT_REF \ _IOC(_IOC_NONE, 'G', 1, sizeof(struct ioctl_gntdev_unmap_grant_ref)) struct ioctl_gntdev_unmap_grant_ref { / IN parameters / / The offset was returned by the corresponding map operation. / __u64 index; / The number of pages to be unmapped. / __u32 count; __u32 pad; }; / * Returns the offset in the driver's address space that corresponds * to @vaddr. This can be used to perform a munmap(), followed by an * UNMAP_GRANT_REF ioctl, where no state about the offset is retained by * the caller. The number of pages that were allocated at the same time as * @vaddr is returned in @count. * * N.B. Where more than one page has been mapped into a contiguous range, the * supplied @vaddr must correspond to the start of the range; otherwise * an error will result. It is only possible to munmap() the entire * contiguously-allocated range at once, and not any subrange thereof. / #define IOCTL_GNTDEV_GET_OFFSET_FOR_VADDR \ _IOC(_IOC_NONE, 'G', 2, sizeof(struct ioctl_gntdev_get_offset_for_vaddr)) struct ioctl_gntdev_get_offset_for_vaddr { / IN parameters / / The virtual address of the first mapped page in a range. / __u64 vaddr; / OUT parameters / / The offset that was used in the initial mmap() operation. / __u64 offset; / The number of pages mapped in the VM area that begins at @vaddr. / __u32 count; __u32 pad; }; / * Sets the maximum number of grants that may mapped at once by this gntdev * instance. * * N.B. This must be called before any other ioctl is performed on the device. / #define IOCTL_GNTDEV_SET_MAX_GRANTS \ _IOC(_IOC_NONE, 'G', 3, sizeof(struct ioctl_gntdev_set_max_grants)) struct ioctl_gntdev_set_max_grants { / IN parameter / / The maximum number of grants that may be mapped at once. / __u32 count; }; / * Sets up an unmap notification within the page, so that the other side can do * cleanup if this side crashes. Required to implement cross-domain robust * mutexes or close notification on communication channels. * * Each mapped page only supports one notification; multiple calls referring to * the same page overwrite the previous notification. You must clear the * notification prior to the IOCTL_GNTALLOC_DEALLOC_GREF if you do not want it * to occur. / #define IOCTL_GNTDEV_SET_UNMAP_NOTIFY \ _IOC(_IOC_NONE, 'G', 7, sizeof(struct ioctl_gntdev_unmap_notify)) struct ioctl_gntdev_unmap_notify { / IN parameters / / Offset in the file descriptor for a byte within the page (same as * used in mmap). If using UNMAP_NOTIFY_CLEAR_BYTE, this is the byte to * be cleared. Otherwise, it can be any byte in the page whose * notification we are adjusting. / __u64 index; / Action(s) to take on unmap / __u32 action; / Event channel to notify / __u32 event_channel_port; }; struct gntdev_grant_copy_segment { union { void virt; struct { grant_ref_t ref; __u16 offset; domid_t domid; } foreign; } source, dest; __u16 len; __u16 flags; /* GNTCOPY_* / __s16 status; / GNTST_* / }; / * Copy between grant references and local buffers. * * The copy is split into @count @segments, each of which can copy * to/from one grant reference. * * Each segment is similar to struct gnttab_copy in the hypervisor ABI * except the local buffer is specified using a virtual address * (instead of a GFN and offset). * * The local buffer may cross a Xen page boundary -- the driver will * split segments into multiple ops if required. * * Returns 0 if all segments have been processed and @status in each * segment is valid. Note that one or more segments may have failed * (status != GNTST_okay). * * If the driver had to split a segment into two or more ops, @status * includes the status of the first failed op for that segment (or * GNTST_okay if all ops were successful). * * If -1 is returned, the status of all segments is undefined. * * EINVAL: A segment has local buffers for both source and * destination. * EINVAL: A segment crosses the boundary of a foreign page. * EFAULT: A segment's local buffer is not accessible. / #define IOCTL_GNTDEV_GRANT_COPY \ _IOC(_IOC_NONE, 'G', 8, sizeof(struct ioctl_gntdev_grant_copy)) struct ioctl_gntdev_grant_copy { unsigned int count; struct gntdev_grant_copy_segment segments; }; /* Clear (set to zero) the byte specified by index / #define UNMAP_NOTIFY_CLEAR_BYTE 0x1 / Send an interrupt on the indicated event channel / #define UNMAP_NOTIFY_SEND_EVENT 0x2 / * Flags to be used while requesting memory mapping's backing storage * to be allocated with DMA API. / / * The buffer is backed with memory allocated with dma_alloc_wc. / #define GNTDEV_DMA_FLAG_WC (1 << 0) / * The buffer is backed with memory allocated with dma_alloc_coherent. / #define GNTDEV_DMA_FLAG_COHERENT (1 << 1) / * Create a dma-buf [1] from grant references @refs of count @count provided * by the foreign domain @domid with flags @flags. * * By default dma-buf is backed by system memory pages, but by providing * one of the GNTDEV_DMA_FLAG_XXX flags it can also be created as * a DMA write-combine or coherent buffer, e.g. allocated with dma_alloc_wc/ * dma_alloc_coherent. * * Returns 0 if dma-buf was successfully created and the corresponding * dma-buf's file descriptor is returned in @fd. * * [1] Documentation/driver-api/dma-buf.rst / #define IOCTL_GNTDEV_DMABUF_EXP_FROM_REFS \ _IOC(_IOC_NONE, 'G', 9, \ sizeof(struct ioctl_gntdev_dmabuf_exp_from_refs)) struct ioctl_gntdev_dmabuf_exp_from_refs { / IN parameters. / / Specific options for this dma-buf: see GNTDEV_DMA_FLAG_XXX. / __u32 flags; / Number of grant references in @refs array. / __u32 count; / OUT parameters. / / File descriptor of the dma-buf. / __u32 fd; / The domain ID of the grant references to be mapped. / __u32 domid; / Variable IN parameter. / / Array of grant references of size @count. / __u32 refs[1]; }; / * This will block until the dma-buf with the file descriptor @fd is * released. This is only valid for buffers created with * IOCTL_GNTDEV_DMABUF_EXP_FROM_REFS. * * If within @wait_to_ms milliseconds the buffer is not released * then -ETIMEDOUT error is returned. * If the buffer with the file descriptor @fd does not exist or has already * been released, then -ENOENT is returned. For valid file descriptors * this must not be treated as error. / #define IOCTL_GNTDEV_DMABUF_EXP_WAIT_RELEASED \ _IOC(_IOC_NONE, 'G', 10, \ sizeof(struct ioctl_gntdev_dmabuf_exp_wait_released)) struct ioctl_gntdev_dmabuf_exp_wait_released { / IN parameters / __u32 fd; __u32 wait_to_ms; }; / * Import a dma-buf with file descriptor @fd and export granted references * to the pages of that dma-buf into array @refs of size @count. / #define IOCTL_GNTDEV_DMABUF_IMP_TO_REFS \ _IOC(_IOC_NONE, 'G', 11, \ sizeof(struct ioctl_gntdev_dmabuf_imp_to_refs)) struct ioctl_gntdev_dmabuf_imp_to_refs { / IN parameters. / / File descriptor of the dma-buf. / __u32 fd; / Number of grant references in @refs array. / __u32 count; / The domain ID for which references to be granted. / __u32 domid; / Reserved - must be zero. / __u32 reserved; / OUT parameters. / / Array of grant references of size @count. / __u32 refs[1]; }; / * This will close all references to the imported buffer with file descriptor * @fd, so it can be released by the owner. This is only valid for buffers * created with IOCTL_GNTDEV_DMABUF_IMP_TO_REFS. / #define IOCTL_GNTDEV_DMABUF_IMP_RELEASE \ _IOC(_IOC_NONE, 'G', 12, \ sizeof(struct ioctl_gntdev_dmabuf_imp_release)) struct ioctl_gntdev_dmabuf_imp_release { / IN parameters / __u32 fd; __u32 reserved; }; #endif / __LINUX_PUBLIC_GNTDEV_H__ */	10.39 KB	2026-03-24 10:01
📄 privcmd.h /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR MIT) / /***************************************************************************** * privcmd.h * * Interface to /proc/xen/privcmd. * * Copyright (c) 2003-2005, K A Fraser * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation; or, when distributed * separately from the Linux kernel or incorporated into other * software packages, subject to the following license: * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this source file (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, copy, modify, * merge, publish, distribute, sublicense, and/or sell copies of the Software, * and to permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. / #ifndef __LINUX_PUBLIC_PRIVCMD_H__ #define __LINUX_PUBLIC_PRIVCMD_H__ #include <linux/types.h> #include <xen/interface/xen.h> struct privcmd_hypercall { __u64 op; __u64 arg[5]; }; struct privcmd_mmap_entry { __u64 va; / * This should be a GFN. It's not possible to change the name because * it's exposed to the user-space. / __u64 mfn; __u64 npages; }; struct privcmd_mmap { int num; domid_t dom; / target domain / struct privcmd_mmap_entry entry; }; struct privcmd_mmapbatch { int num; /* number of pages to populate / domid_t dom; / target domain / __u64 addr; / virtual address / xen_pfn_t arr; /* array of mfns - or'd with PRIVCMD_MMAPBATCH__ERROR on err / }; #define PRIVCMD_MMAPBATCH_MFN_ERROR 0xf0000000U #define PRIVCMD_MMAPBATCH_PAGED_ERROR 0x80000000U struct privcmd_mmapbatch_v2 { unsigned int num; /* number of pages to populate / domid_t dom; / target domain / __u64 addr; / virtual address / const xen_pfn_t arr; /* array of mfns / int err; /* array of error codes / }; struct privcmd_dm_op_buf { void uptr; size_t size; }; struct privcmd_dm_op { domid_t dom; __u16 num; const struct privcmd_dm_op_buf ubufs; }; struct privcmd_mmap_resource { domid_t dom; __u32 type; __u32 id; __u32 idx; __u64 num; __u64 addr; }; / * @cmd: IOCTL_PRIVCMD_HYPERCALL * @arg: &privcmd_hypercall_t * Return: Value returned from execution of the specified hypercall. * * @cmd: IOCTL_PRIVCMD_MMAPBATCH_V2 * @arg: &struct privcmd_mmapbatch_v2 * Return: 0 on success (i.e., arg->err contains valid error codes for * each frame). On an error other than a failed frame remap, -1 is * returned and errno is set to EINVAL, EFAULT etc. As an exception, * if the operation was otherwise successful but any frame failed with * -ENOENT, then -1 is returned and errno is set to ENOENT. / #define IOCTL_PRIVCMD_HYPERCALL \ _IOC(_IOC_NONE, 'P', 0, sizeof(struct privcmd_hypercall)) #define IOCTL_PRIVCMD_MMAP \ _IOC(_IOC_NONE, 'P', 2, sizeof(struct privcmd_mmap)) #define IOCTL_PRIVCMD_MMAPBATCH \ _IOC(_IOC_NONE, 'P', 3, sizeof(struct privcmd_mmapbatch)) #define IOCTL_PRIVCMD_MMAPBATCH_V2 \ _IOC(_IOC_NONE, 'P', 4, sizeof(struct privcmd_mmapbatch_v2)) #define IOCTL_PRIVCMD_DM_OP \ _IOC(_IOC_NONE, 'P', 5, sizeof(struct privcmd_dm_op)) #define IOCTL_PRIVCMD_RESTRICT \ _IOC(_IOC_NONE, 'P', 6, sizeof(domid_t)) #define IOCTL_PRIVCMD_MMAP_RESOURCE \ _IOC(_IOC_NONE, 'P', 7, sizeof(struct privcmd_mmap_resource)) #endif / __LINUX_PUBLIC_PRIVCMD_H__ */	4.11 KB	2026-03-24 10:01

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