cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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aio-posix.h (2064B)

      1/*
      2 * AioContext POSIX event loop implementation internal APIs
      3 *
      4 * Copyright IBM, Corp. 2008
      5 * Copyright Red Hat, Inc. 2020
      6 *
      7 * Authors:
      8 *  Anthony Liguori   <aliguori@us.ibm.com>
      9 *
     10 * This work is licensed under the terms of the GNU GPL, version 2.  See
     11 * the COPYING file in the top-level directory.
     12 *
     13 * Contributions after 2012-01-13 are licensed under the terms of the
     14 * GNU GPL, version 2 or (at your option) any later version.
     15 */
     16
     17#ifndef AIO_POSIX_H
     18#define AIO_POSIX_H
     19
     20#include "block/aio.h"
     21
     22struct AioHandler {
     23    GPollFD pfd;
     24    IOHandler *io_read;
     25    IOHandler *io_write;
     26    AioPollFn *io_poll;
     27    IOHandler *io_poll_begin;
     28    IOHandler *io_poll_end;
     29    void *opaque;
     30    QLIST_ENTRY(AioHandler) node;
     31    QLIST_ENTRY(AioHandler) node_ready; /* only used during aio_poll() */
     32    QLIST_ENTRY(AioHandler) node_deleted;
     33    QLIST_ENTRY(AioHandler) node_poll;
     34#ifdef CONFIG_LINUX_IO_URING
     35    QSLIST_ENTRY(AioHandler) node_submitted;
     36    unsigned flags; /* see fdmon-io_uring.c */
     37#endif
     38    int64_t poll_idle_timeout; /* when to stop userspace polling */
     39    bool is_external;
     40};
     41
     42/* Add a handler to a ready list */
     43void aio_add_ready_handler(AioHandlerList *ready_list, AioHandler *node,
     44                           int revents);
     45
     46extern const FDMonOps fdmon_poll_ops;
     47
     48#ifdef CONFIG_EPOLL_CREATE1
     49bool fdmon_epoll_try_upgrade(AioContext *ctx, unsigned npfd);
     50void fdmon_epoll_setup(AioContext *ctx);
     51void fdmon_epoll_disable(AioContext *ctx);
     52#else
     53static inline bool fdmon_epoll_try_upgrade(AioContext *ctx, unsigned npfd)
     54{
     55    return false;
     56}
     57
     58static inline void fdmon_epoll_setup(AioContext *ctx)
     59{
     60}
     61
     62static inline void fdmon_epoll_disable(AioContext *ctx)
     63{
     64}
     65#endif /* !CONFIG_EPOLL_CREATE1 */
     66
     67#ifdef CONFIG_LINUX_IO_URING
     68bool fdmon_io_uring_setup(AioContext *ctx);
     69void fdmon_io_uring_destroy(AioContext *ctx);
     70#else
     71static inline bool fdmon_io_uring_setup(AioContext *ctx)
     72{
     73    return false;
     74}
     75
     76static inline void fdmon_io_uring_destroy(AioContext *ctx)
     77{
     78}
     79#endif /* !CONFIG_LINUX_IO_URING */
     80
     81#endif /* AIO_POSIX_H */