On Fri, 2014-02-14 at 17:42 +, Catalin Marinas wrote:
> On Wed, Feb 05, 2014 at 05:04:07PM +, Leif Lindholm wrote:
> > +void __init create_id_mapping(phys_addr_t addr, phys_addr_t size, int
> > map_io)
> > +{
> > + pgd_t *pgd = &idmap_pg_dir[pgd_index(addr)];
> > +
> > + if (pgd >= &id
On Wed, Feb 05, 2014 at 05:04:07PM +, Leif Lindholm wrote:
> +void __init create_id_mapping(phys_addr_t addr, phys_addr_t size, int map_io)
> +{
> + pgd_t *pgd = &idmap_pg_dir[pgd_index(addr)];
> +
> + if (pgd >= &idmap_pg_dir[ARRAY_SIZE(idmap_pg_dir)]) {
> + pr_warn("BUG: n
From: Mark Salter
At boot time, before switching to a virtual UEFI memory map, firmware
expects UEFI memory and IO regions to be identity mapped whenever
kernel makes runtime services calls. The exisitng early boot code
creates an identity map of kernel text/data but this is not sufficient
for UE
