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xen_pt: Present the size of 64 bit BARs correctly

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The full size of the BAR is stored in the lower PCIIORegion.size. The
upper PCIIORegion.size is 0.  Calculate the size of the upper half
correctly from the lower half otherwise the size read by the guest will
be incorrect.

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
This commit is contained in:
Ross Lagerwall 2018-05-14 10:57:46 +01:00 committed by Stefano Stabellini
parent 70c292afdf
commit dc9e46a29a
1 changed files with 2 additions and 0 deletions
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2
hw/xen/xen_pt_config_init.c
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@ -504,6 +504,8 @@ static int xen_pt_bar_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
bar_ro_mask = XEN_PT_BAR_IO_RO_MASK | (r_size - 1);
break;
case XEN_PT_BAR_FLAG_UPPER:
assert(index > 0);
r_size = d->io_regions[index - 1].size >> 32;
bar_emu_mask = XEN_PT_BAR_ALLF;
bar_ro_mask = r_size ? r_size - 1 : 0;
break;