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exec: Implement qemu_ram_free_from_ptr()

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Required for regions mapped via qemu_ram_alloc_from_ptr().  VFIO
and ivshmem will make use of this to remove mappings when devices
are hot unplugged.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Alex Williamson 2011-05-03 12:48:09 -06:00 committed by Aurelien Jarno
parent c83066d4c4
commit 1f2e98b62d
2 changed files with 14 additions and 0 deletions
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1
cpu-common.h
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@ -61,6 +61,7 @@ ram_addr_t qemu_ram_alloc_from_ptr(DeviceState *dev, const char *name,
ram_addr_t size, void *host); ram_addr_t size, void *host);
ram_addr_t qemu_ram_alloc(DeviceState *dev, const char *name, ram_addr_t size); ram_addr_t qemu_ram_alloc(DeviceState *dev, const char *name, ram_addr_t size);
void qemu_ram_free(ram_addr_t addr); void qemu_ram_free(ram_addr_t addr);
void qemu_ram_free_from_ptr(ram_addr_t addr);
void qemu_ram_remap(ram_addr_t addr, ram_addr_t length); void qemu_ram_remap(ram_addr_t addr, ram_addr_t length);
/* This should only be used for ram local to a device. */ /* This should only be used for ram local to a device. */
void *qemu_get_ram_ptr(ram_addr_t addr); void *qemu_get_ram_ptr(ram_addr_t addr);

13
exec.c
View File

@ -2952,6 +2952,19 @@ ram_addr_t qemu_ram_alloc(DeviceState *dev, const char *name, ram_addr_t size)
return qemu_ram_alloc_from_ptr(dev, name, size, NULL); return qemu_ram_alloc_from_ptr(dev, name, size, NULL);
} }
void qemu_ram_free_from_ptr(ram_addr_t addr)
{
RAMBlock *block;
QLIST_FOREACH(block, &ram_list.blocks, next) {
if (addr == block->offset) {
QLIST_REMOVE(block, next);
qemu_free(block);
return;
}
}
}
void qemu_ram_free(ram_addr_t addr) void qemu_ram_free(ram_addr_t addr)
{ {
RAMBlock *block; RAMBlock *block;