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 "libqos/malloc-pc.h"
  14 #include "libqos/fw_cfg.h"
  15
  16 #define NO_QEMU_PROTOS
  17 #include "hw/nvram/fw_cfg.h"
  18
  19 #include "qemu-common.h"
  20 #include <glib.h>
  21
  22 #define PAGE_SIZE (4096)
  23
  24 /*
  25  * Mostly for valgrind happiness, but it does offer
  26  * a chokepoint for debugging guest memory leaks, too.
  27  */
  28 void pc_alloc_uninit(QGuestAllocator *allocator)
  29 {
  30     alloc_uninit(allocator);
  31 }
  32
  33 QGuestAllocator *pc_alloc_init_flags(QAllocOpts flags)
  34 {
  35     QGuestAllocator *s = g_malloc0(sizeof(*s));
  36     uint64_t ram_size;
  37     QFWCFG *fw_cfg = pc_fw_cfg_init();
  38     MemBlock *node;
  39
  40     s->opts = flags;
  41     s->page_size = PAGE_SIZE;
  42
  43     ram_size = qfw_cfg_get_u64(fw_cfg, FW_CFG_RAM_SIZE);
  44
  45     /* Start at 1MB */
  46     s->start = 1 << 20;
  47
  48     /* Respect PCI hole */
  49     s->end = MIN(ram_size, 0xE0000000);
  50
  51     /* clean-up */
  52     g_free(fw_cfg);
  53
  54     QTAILQ_INIT(&s->used);
  55     QTAILQ_INIT(&s->free);
  56
  57     node = mlist_new(s->start, s->end - s->start);
  58     QTAILQ_INSERT_HEAD(&s->free, node, MLIST_ENTNAME);
  59
  60     return s;
  61 }
  62
  63 inline QGuestAllocator *pc_alloc_init(void)
  64 {
  65     return pc_alloc_init_flags(ALLOC_NO_FLAGS);
  66 }