Hello,

I am trying to add hw timestamping to the igbvf driver in a KVM guest.

But some of the registers I need to access are offset further away than the
BAR0 size (16k).

pci 0000:00:0d.0: reg 10: [mem 0xfebd4000-0xfebd7fff]

ls -l /sys/bus/pci/devices/0000\:00\:0d.0/resource0
-rw-------    1 root     root         16384 Aug 22 12:00
/sys/bus/pci/devices/0000:00:0d.0/resource0


I need for instance to access register:
#define E1000_TSAUXC     0x0B640 /* Timesync Auxiliary Control register */

But this is of course not mapped.

I get the feeling this is not meant to be working but I would like some
confirmation, please.

Any help is highly appreciated.


Regards,
Mattias

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