Re: Requirement to get BAR pci_bus_address in user space

From: okaya
Date: Thu Jun 14 2018 - 06:33:46 EST

On 2018-06-14 06:29, Srinath Mannam wrote:
++ Alex Williamson, kvm,

Hi Christoph,

Thank you for quick reply.

If we want to add this in vfio then I think we need to do the same in
uio case also.

As I mentioned in previous mail, in the current implementation
resource information (address and size) is gathering from resource
named file created in /sys directory.
So I expect it would be better to have similar method as existing in sysfs.

Can you give some info on why you need the actual bar address value?


On Thu, Jun 14, 2018 at 3:50 PM, Christoph Hellwig <hch@xxxxxx> wrote:
The only safe way to use PCI(e) devices in userspace is through vfio.
I think that is where you need to take your inquiries.