tests/libqos/malloc-pc.c

   1 /*
   2  * libqos malloc support for PC
   3  *
   4  * Copyright IBM, Corp. 2012-2013
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "libqos/malloc-pc.h"
  15 #include "libqos/fw_cfg.h"
  16
  17 #include "standard-headers/linux/qemu_fw_cfg.h"
  18
  19 #include "qemu-common.h"
  20
  21 #define PAGE_SIZE (4096)
  22
  23 /*
  24  * Mostly for valgrind happiness, but it does offer
  25  * a chokepoint for debugging guest memory leaks, too.
  26  */
  27 void pc_alloc_uninit(QGuestAllocator *allocator)
  28 {
  29     alloc_uninit(allocator);
  30 }
  31
  32 QGuestAllocator *pc_alloc_init_flags(QTestState *qts, QAllocOpts flags)
  33 {
  34     QGuestAllocator *s;
  35     uint64_t ram_size;
  36     QFWCFG *fw_cfg = pc_fw_cfg_init(qts);
  37
  38     ram_size = qfw_cfg_get_u64(fw_cfg, FW_CFG_RAM_SIZE);
  39     s = alloc_init_flags(flags, 1 << 20, MIN(ram_size, 0xE0000000));
  40     alloc_set_page_size(s, PAGE_SIZE);
  41
  42     /* clean-up */
  43     g_free(fw_cfg);
  44
  45     return s;
  46 }
  47
  48 inline QGuestAllocator *pc_alloc_init(QTestState *qts)
  49 {
  50     return pc_alloc_init_flags(qts, ALLOC_NO_FLAGS);
  51 }