On Wed, 2019-10-16 at 20:30 +1100, Michael Ellerman wrote:
> I think the main reason is that in some configurations we can't use 64K
> pages for MMIO, so the 64K vmalloc mappings and 4K MMIO mappings need to
> be in different segments.
>
> It's possible that's no longer true on modern configs.
Seems to work for me so far! I've tried successfully against 5.2.21 and
5.3.6.
Thanks!
-Cameron
On 10/15/19 10:51 PM, Aneesh Kumar K.V wrote:
With commit: 0034d395f89d ("powerpc/mm/hash64: Map all the kernel
regions in the same 0xc range"), kernel now split the 64TB address range
into 4
Christoph Hellwig writes:
> On Wed, Oct 16, 2019 at 11:21:30AM +0530, Aneesh Kumar K.V wrote:
>> With commit: 0034d395f89d ("powerpc/mm/hash64: Map all the kernel
>> regions in the same 0xc range"), kernel now split the 64TB address range
>> into 4 contexts each of 16TB. That implies we can do
On 10/16/19 11:35 AM, Christoph Hellwig wrote:
On Wed, Oct 16, 2019 at 11:21:30AM +0530, Aneesh Kumar K.V wrote:
With commit: 0034d395f89d ("powerpc/mm/hash64: Map all the kernel
regions in the same 0xc range"), kernel now split the 64TB address range
into 4 contexts each of 16TB. That implies
On Wed, Oct 16, 2019 at 11:21:30AM +0530, Aneesh Kumar K.V wrote:
> With commit: 0034d395f89d ("powerpc/mm/hash64: Map all the kernel
> regions in the same 0xc range"), kernel now split the 64TB address range
> into 4 contexts each of 16TB. That implies we can do only 16TB linear
> mapping. This
With commit: 0034d395f89d ("powerpc/mm/hash64: Map all the kernel
regions in the same 0xc range"), kernel now split the 64TB address range
into 4 contexts each of 16TB. That implies we can do only 16TB linear
mapping. This results in boot failure on some P9 systems.
Fix this by redoing the hash
