Re: [PATCH v7 00/13] Support PPTT for ARM64

[Jeremy Linton]

On 03/01/2018 06:06 AM, Sudeep Holla wrote:
> Hi Jeremy,
>
> On 28/02/18 22:06, Jeremy Linton wrote:
> > ACPI 6.2 adds the Processor Properties Topology Table (PPTT), which is
> > used to describe the processor and cache topology. Ideally it is
> > used to extend/override information provided by the hardware, but
> > right now ARM64 is entirely dependent on firmware provided tables.
> >
> > This patch parses the table for the cache topology and CPU topology.
> > When we enable ACPI/PPTT for arm64 we map the physical_id to the
> > PPTT node flagged as the physical package by the firmware.
> > This results in topologies that match what the remainder of the
> > system expects. To avoid inverted scheduler domains we then
> > set the MC domain equal to the largest cache within the socket
> > below the NUMA domain.
> I remember reviewing and acknowledging most of the cacheinfo stuff with
> couple of minor suggestions for v6. I don't see any Acked-by tags in
> this series and don't know if I need to review/ack any more cacheinfo
> related patches.

Hi,

Yes, I didn't put them in because I changed the functionality in 2/13 
and there is a bug fix in 5/13. I thought you might want to do a quick 
diff of the git v6->v7 tree.

Although given that most of the changes were in response to your 
comments in v6 I probably should have just put the tags in.


Thanks,