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Add skip_dump flag to ignore memory region during dump 

The PCI MMIO might be disabled or the device in the reset state.
Make sure we do not dump these memory regions.

Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
CC: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Nikunj A Dadhania 2014-09-15 09:28:23 +05:30 committed by Paolo Bonzini
parent b154537ad0
commit e4dc3f5909
4 changed files with 32 additions and 1 deletions
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1
hw/misc/vfio.c
View File

@ -2911,6 +2911,7 @@ static int vfio_mmap_bar(VFIODevice *vdev, VFIOBAR *bar,
}
memory_region_init_ram_ptr(submem, OBJECT(vdev), name, size, *map);
memory_region_set_skip_dump(submem);
} else {
empty_region:
/* Create a zero sized sub-region to make cleanup easy. */

19
include/exec/memory.h
View File

@ -150,6 +150,7 @@ struct MemoryRegion {
bool terminates;
bool romd_mode;
bool ram;
bool skip_dump;
bool readonly; /* For RAM regions */
bool enabled;
bool rom_device;
@ -456,6 +457,24 @@ uint64_t memory_region_size(MemoryRegion *mr);
*/
bool memory_region_is_ram(MemoryRegion *mr);
/**
* memory_region_is_skip_dump: check whether a memory region should not be
* dumped
*
* Returns %true is a memory region should not be dumped(e.g. VFIO BAR MMAP).
*
* @mr: the memory region being queried
*/
bool memory_region_is_skip_dump(MemoryRegion *mr);
/**
* memory_region_set_skip_dump: Set skip_dump flag, dump will ignore this memory
* region
*
* @mr: the memory region being queried
*/
void memory_region_set_skip_dump(MemoryRegion *mr);
/**
* memory_region_is_romd: check whether a memory region is in ROMD mode
*

10
memory.c
View File

@ -1185,6 +1185,11 @@ void memory_region_init_ram_ptr(MemoryRegion *mr,
mr->ram_addr = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_abort);
}
void memory_region_set_skip_dump(MemoryRegion *mr)
{
mr->skip_dump = true;
}
void memory_region_init_alias(MemoryRegion *mr,
Object *owner,
const char *name,
@ -1306,6 +1311,11 @@ bool memory_region_is_ram(MemoryRegion *mr)
return mr->ram;
}
bool memory_region_is_skip_dump(MemoryRegion *mr)
{
return mr->skip_dump;
}
bool memory_region_is_logging(MemoryRegion *mr)
{
return mr->dirty_log_mask;

3
memory_mapping.c
View File

@ -203,7 +203,8 @@ static void guest_phys_blocks_region_add(MemoryListener *listener,
GuestPhysBlock *predecessor;
/* we only care about RAM */
if (!memory_region_is_ram(section->mr)) {
if (!memory_region_is_ram(section->mr) ||
memory_region_is_skip_dump(section->mr)) {
return;
}