Re: [Xen-devel] [PATCH 5/6] hvmloader: Change memory relocation loop when overlap with PCI hole.

[Keir Fraser <keir@xxxxxxx>]

On 04/11/2011 10:38, "Jean Guyader" <jean.guyader@xxxxxxxxxxxxx> wrote:

> 
> Change the way we relocate the memory page if they overlap with pci hole.
> Use new map space (XENMAPSPACE_gmfn_range) to move the loop into xen.
> 
> This code usually get triggered when a device is pass through to a guest
> and the PCI hole has to be extended to have enough room to map the device
> BARs.
> The PCI hole will starts lower and it might overlap with some RAM that has
> been
> alocated for the guest. That usually happen if the guest has more than 4G of
> RAM.
> We have to relocate those pages in high mem otherwise they won't be
> accessible.

If the size field in the add_to_physmap structure is reduced to 16 bits, the
new if() stmt will probably have to become a while() again.

The new printf's are just excess verbiage. We dump the memory map as we exit
hvmloader anyway.

 -- Keir

> Signed-off-by: Jean Guyader <jean.guyader@xxxxxxxxxxxxx>
> ---
>  tools/firmware/hvmloader/pci.c |   20 ++++++++++++++------
>  1 files changed, 14 insertions(+), 6 deletions(-)
> 
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