0e9b5cd6b2
Glue code to the userfaultfd kernel implementation. Querying feature support, createing file descriptor, feature control, memory region registration, IOCTLs on registered registered regions. Signed-off-by: Andrey Gruzdev <andrey.gruzdev@virtuozzo.com> Reviewed-by: Peter Xu <peterx@redhat.com> Message-Id: <20210129101407.103458-3-andrey.gruzdev@virtuozzo.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Fixed up range.start casting for 32bit
36 lines
1.2 KiB
C
36 lines
1.2 KiB
C
/*
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* Linux UFFD-WP support
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*
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* Copyright Virtuozzo GmbH, 2020
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*
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* Authors:
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* Andrey Gruzdev <andrey.gruzdev@virtuozzo.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*/
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#ifndef USERFAULTFD_H
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#define USERFAULTFD_H
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#include "qemu/osdep.h"
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#include "exec/hwaddr.h"
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#include <linux/userfaultfd.h>
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int uffd_query_features(uint64_t *features);
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int uffd_create_fd(uint64_t features, bool non_blocking);
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void uffd_close_fd(int uffd_fd);
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int uffd_register_memory(int uffd_fd, void *addr, uint64_t length,
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uint64_t mode, uint64_t *ioctls);
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int uffd_unregister_memory(int uffd_fd, void *addr, uint64_t length);
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int uffd_change_protection(int uffd_fd, void *addr, uint64_t length,
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bool wp, bool dont_wake);
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int uffd_copy_page(int uffd_fd, void *dst_addr, void *src_addr,
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uint64_t length, bool dont_wake);
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int uffd_zero_page(int uffd_fd, void *addr, uint64_t length, bool dont_wake);
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int uffd_wakeup(int uffd_fd, void *addr, uint64_t length);
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int uffd_read_events(int uffd_fd, struct uffd_msg *msgs, int count);
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bool uffd_poll_events(int uffd_fd, int tmo);
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#endif /* USERFAULTFD_H */
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