mirror of
https://github.com/torvalds/linux.git
synced 2024-12-13 22:53:20 +00:00
ad4c365221
Link: https://lkml.kernel.org/r/a73cf109de0224cfd118d22be58ddebac3ae2897.1664366292.git-series.apopple@nvidia.com Signed-off-by: Alistair Popple <apopple@nvidia.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: Ralph Campbell <rcampbell@nvidia.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Alex Sierra <alex.sierra@amd.com> Cc: Felix Kuehling <Felix.Kuehling@amd.com> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: Christian König <christian.koenig@amd.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Lyude Paul <lyude@redhat.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Yang Shi <shy828301@gmail.com> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
78 lines
2.9 KiB
C
78 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
/*
|
|
* This is a module to test the HMM (Heterogeneous Memory Management) API
|
|
* of the kernel. It allows a userspace program to expose its entire address
|
|
* space through the HMM test module device file.
|
|
*/
|
|
#ifndef _LIB_TEST_HMM_UAPI_H
|
|
#define _LIB_TEST_HMM_UAPI_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/ioctl.h>
|
|
|
|
/*
|
|
* Structure to pass to the HMM test driver to mimic a device accessing
|
|
* system memory and ZONE_DEVICE private memory through device page tables.
|
|
*
|
|
* @addr: (in) user address the device will read/write
|
|
* @ptr: (in) user address where device data is copied to/from
|
|
* @npages: (in) number of pages to read/write
|
|
* @cpages: (out) number of pages copied
|
|
* @faults: (out) number of device page faults seen
|
|
*/
|
|
struct hmm_dmirror_cmd {
|
|
__u64 addr;
|
|
__u64 ptr;
|
|
__u64 npages;
|
|
__u64 cpages;
|
|
__u64 faults;
|
|
};
|
|
|
|
/* Expose the address space of the calling process through hmm device file */
|
|
#define HMM_DMIRROR_READ _IOWR('H', 0x00, struct hmm_dmirror_cmd)
|
|
#define HMM_DMIRROR_WRITE _IOWR('H', 0x01, struct hmm_dmirror_cmd)
|
|
#define HMM_DMIRROR_MIGRATE_TO_DEV _IOWR('H', 0x02, struct hmm_dmirror_cmd)
|
|
#define HMM_DMIRROR_MIGRATE_TO_SYS _IOWR('H', 0x03, struct hmm_dmirror_cmd)
|
|
#define HMM_DMIRROR_SNAPSHOT _IOWR('H', 0x04, struct hmm_dmirror_cmd)
|
|
#define HMM_DMIRROR_EXCLUSIVE _IOWR('H', 0x05, struct hmm_dmirror_cmd)
|
|
#define HMM_DMIRROR_CHECK_EXCLUSIVE _IOWR('H', 0x06, struct hmm_dmirror_cmd)
|
|
#define HMM_DMIRROR_RELEASE _IOWR('H', 0x07, struct hmm_dmirror_cmd)
|
|
|
|
/*
|
|
* Values returned in hmm_dmirror_cmd.ptr for HMM_DMIRROR_SNAPSHOT.
|
|
* HMM_DMIRROR_PROT_ERROR: no valid mirror PTE for this page
|
|
* HMM_DMIRROR_PROT_NONE: unpopulated PTE or PTE with no access
|
|
* HMM_DMIRROR_PROT_READ: read-only PTE
|
|
* HMM_DMIRROR_PROT_WRITE: read/write PTE
|
|
* HMM_DMIRROR_PROT_PMD: PMD sized page is fully mapped by same permissions
|
|
* HMM_DMIRROR_PROT_PUD: PUD sized page is fully mapped by same permissions
|
|
* HMM_DMIRROR_PROT_ZERO: special read-only zero page
|
|
* HMM_DMIRROR_PROT_DEV_PRIVATE_LOCAL: Migrated device private page on the
|
|
* device the ioctl() is made
|
|
* HMM_DMIRROR_PROT_DEV_PRIVATE_REMOTE: Migrated device private page on some
|
|
* other device
|
|
* HMM_DMIRROR_PROT_DEV_COHERENT: Migrate device coherent page on the device
|
|
* the ioctl() is made
|
|
*/
|
|
enum {
|
|
HMM_DMIRROR_PROT_ERROR = 0xFF,
|
|
HMM_DMIRROR_PROT_NONE = 0x00,
|
|
HMM_DMIRROR_PROT_READ = 0x01,
|
|
HMM_DMIRROR_PROT_WRITE = 0x02,
|
|
HMM_DMIRROR_PROT_PMD = 0x04,
|
|
HMM_DMIRROR_PROT_PUD = 0x08,
|
|
HMM_DMIRROR_PROT_ZERO = 0x10,
|
|
HMM_DMIRROR_PROT_DEV_PRIVATE_LOCAL = 0x20,
|
|
HMM_DMIRROR_PROT_DEV_PRIVATE_REMOTE = 0x30,
|
|
HMM_DMIRROR_PROT_DEV_COHERENT_LOCAL = 0x40,
|
|
HMM_DMIRROR_PROT_DEV_COHERENT_REMOTE = 0x50,
|
|
};
|
|
|
|
enum {
|
|
/* 0 is reserved to catch uninitialized type fields */
|
|
HMM_DMIRROR_MEMORY_DEVICE_PRIVATE = 1,
|
|
HMM_DMIRROR_MEMORY_DEVICE_COHERENT,
|
|
};
|
|
|
|
#endif /* _LIB_TEST_HMM_UAPI_H */
|