mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
e478425bec
Add a sanity test for hmm_range_fault() returning the page mapping size order. Link: https://lore.kernel.org/r/20200701225352.9649-6-rcampbell@nvidia.com Signed-off-by: Ralph Campbell <rcampbell@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
64 lines
2.3 KiB
C
64 lines
2.3 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 _IOWR('H', 0x02, struct hmm_dmirror_cmd)
|
|
#define HMM_DMIRROR_SNAPSHOT _IOWR('H', 0x03, 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
|
|
*/
|
|
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,
|
|
};
|
|
|
|
#endif /* _LIB_TEST_HMM_UAPI_H */
|