From: Anthony PERARD <anthony.per...@citrix.com>
QEMU does not need and should not allocate memory for the ROM of a
passthrough PCI device. So this patch initialize the particular region
like any other PCI BAR of a passthrough device.
When a guest will access the ROM, Xen will take care of the IO, QEMU
will not be involved in it.
Xen set a limit of memory available for each guest, allocating memory
for a ROM can hit this limit.
Signed-off-by: Anthony PERARD <anthony.per...@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabell...@eu.citrix.com>
Reported-and-Tested-by: Konrad Rzeszutek Wilk <konrad.w...@oracle.com>
---
hw/xen/xen_pt.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/xen/xen_pt.c b/hw/xen/xen_pt.c
index eee4354..be4220b 100644
--- a/hw/xen/xen_pt.c
+++ b/hw/xen/xen_pt.c
@@ -440,8 +440,8 @@ static int xen_pt_register_regions(XenPCIPassthroughState
*s)
s->bases[PCI_ROM_SLOT].access.maddr = d->rom.base_addr;
- memory_region_init_rom_device(&s->rom, OBJECT(s), NULL, NULL,
- "xen-pci-pt-rom", d->rom.size);
+ memory_region_init_io(&s->rom, OBJECT(s), &ops, &s->dev,
+ "xen-pci-pt-rom", d->rom.size);
pci_register_bar(&s->dev, PCI_ROM_SLOT, PCI_BASE_ADDRESS_MEM_PREFETCH,
&s->rom);
--
1.7.10.4
