Hello Folks,
I am very new to Xen hence forgive me if this is a naive qn. On my board
I have 1 GB of Ram. When Xen
launches Domain0 ie Linux , I reserved some high mem region for my driver
usage. When I tried to access the
reseved high memory region for my driver using ioremap it failed. I then
used the mfn_to_virt func, which gave me
the virtual address of the reserved high memory. Can you please help me
understand how do we have a VA already assigned
to the reserved high memory region and the reason for ioremap failure.
Girish
I am very new to Xen hence forgive me if this is a naive qn. On my board
I have 1 GB of Ram. When Xen
launches Domain0 ie Linux , I reserved some high mem region for my driver
usage. When I tried to access the
reseved high memory region for my driver using ioremap it failed. I then
used the mfn_to_virt func, which gave me
the virtual address of the reserved high memory. Can you please help me
understand how do we have a VA already assigned
to the reserved high memory region and the reason for ioremap failure.
Girish