55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
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/*
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* Copyright 2013 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Authors: Jérôme Glisse <jglisse@redhat.com>
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*/
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/*
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* This is a dummy driver to exercise the HMM (heterogeneous memory management)
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* API of the kernel. It allows a userspace program to expose its entire address
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* space through the HMM dummy driver file.
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*/
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#ifndef _UAPI_LINUX_HMM_DMIRROR_H
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#define _UAPI_LINUX_HMM_DMIRROR_H
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#include <linux/types.h>
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#include <linux/ioctl.h>
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#include <linux/irqnr.h>
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struct hmm_dmirror_read {
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uint64_t addr;
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uint64_t ptr;
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uint64_t npages;
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uint64_t cpages;
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uint64_t dpages;
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};
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struct hmm_dmirror_write {
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uint64_t addr;
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uint64_t ptr;
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uint64_t npages;
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uint64_t cpages;
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uint64_t dpages;
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};
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struct hmm_dmirror_migrate {
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uint64_t addr;
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uint64_t npages;
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};
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/* Expose the address space of the calling process through hmm dummy dev file */
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#define HMM_DMIRROR_READ _IOWR('H', 0x00, struct hmm_dmirror_read)
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#define HMM_DMIRROR_WRITE _IOWR('H', 0x01, struct hmm_dmirror_write)
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#define HMM_DMIRROR_MIGRATE _IOWR('H', 0x02, struct hmm_dmirror_migrate)
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#endif /* _UAPI_LINUX_HMM_DMIRROR_H */
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