/****************************************************************************** * tools/xenpaging/xenpaging.h * * Xen domain paging. * * Copyright (c) 2009 Citrix Systems, Inc. (Patrick Colp) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; If not, see . */ #ifndef __XEN_PAGING2_H__ #define __XEN_PAGING2_H__ #include #include #include #include #include #include #include #define XC_WANT_COMPAT_MAP_FOREIGN_API #include // #include #include #include #define XENPAGING_PAGEIN_QUEUE_SIZE 64 struct vm_event { domid_t domain_id; xenevtchn_handle *xce_handle; int port; vm_event_back_ring_t back_ring; uint32_t evtchn_port; void *ring_page; }; struct xenpaging { xc_interface *xc_handle; xentoollog_logger *logger; struct xs_handle *xs_handle; unsigned long *bitmap; unsigned long *slot_to_gfn; int *gfn_to_slot; void *paging_buffer; struct vm_event vm_event; int fd; /* number of pages for which data structures were allocated */ int max_pages; int num_paged_out; int target_tot_pages; int policy_mru_size; int use_poll_timeout; int debug; int stack_count; int *free_slot_stack; unsigned long pagein_queue[XENPAGING_PAGEIN_QUEUE_SIZE]; }; #define DPRINTF(msg, args...) xtl_log(paging->logger, XTL_DETAIL, 0, \ "paging", msg, ## args) #define ERROR(msg, args...) xtl_log(paging->logger, XTL_ERROR, -1, \ "paging", msg, ## args) #define PERROR(msg, args...) xtl_log(paging->logger, XTL_ERROR, -1, \ "paging", msg "(%d = %s)", ## args, \ errno, strerror(errno)) extern void create_page_in_thread(struct xenpaging *paging); extern void page_in_trigger(void); #define BITS_PER_LONG (sizeof(unsigned long) * 8) #define ORDER_LONG (sizeof(unsigned long) == 4 ? 5 : 6) #define BITMAP_ENTRY(_nr,_bmap) ((_bmap))[(_nr) / 8] #define BITMAP_SHIFT(_nr) ((_nr) % 8) static inline int bitmap_size(int nr_bits) { return (nr_bits + 7) / 8; } static inline void *bitmap_alloc(int nr_bits) { return calloc(1, bitmap_size(nr_bits)); } static inline void bitmap_clear(void *addr, int nr_bits) { memset(addr, 0, bitmap_size(nr_bits)); } static inline int test_bit(int nr, const void *_addr) { const char *addr = _addr; return (BITMAP_ENTRY(nr, addr) >> BITMAP_SHIFT(nr)) & 1; } static inline void clear_bit(int nr, void *_addr) { char *addr = _addr; BITMAP_ENTRY(nr, addr) &= ~(1UL << BITMAP_SHIFT(nr)); } static inline void set_bit(int nr, void *_addr) { char *addr = _addr; BITMAP_ENTRY(nr, addr) |= (1UL << BITMAP_SHIFT(nr)); } static inline int test_and_clear_bit(int nr, void *addr) { int oldbit = test_bit(nr, addr); clear_bit(nr, addr); return oldbit; } static inline int test_and_set_bit(int nr, void *addr) { int oldbit = test_bit(nr, addr); set_bit(nr, addr); return oldbit; } #endif // __XEN_PAGING_H__ /* * Local variables: * mode: C * c-file-style: "BSD" * c-basic-offset: 4 * tab-width: 4 * indent-tabs-mode: nil * End: */