mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
77 lines
2.9 KiB
77 lines
2.9 KiB
/* 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 */
|
|
|