On Thu, Jun 28, 2018 at 05:18:28PM +0800, Shunyong Yang wrote: > As PPTT spec doesn't define the physical package id, > find_acpi_cpu_topology_package() will return offset of the node with > Physical package field set when querying physical package id. So, it > returns 162(0xA2) in following example. > > [0A2h 0162 1] Subtable Type : 00 [Processor Hierarchy > Node] > [0A3h 0163 1] Length : 1C > [0A4h 0164 2] Reserved : 0000 > [0A6h 0166 4] Flags (decoded below) : 00000003 > Physical package : 1 > ACPI Processor ID valid : 1 > [0AAh 0170 4] Parent : 00000000 > [0AEh 0174 4] ACPI Processor ID : 00001000 > [0B2h 0178 4] Private Resource Number : 00000002 > [0B6h 0182 4] Private Resource : 0000006C > [0BAh 0186 4] Private Resource : 00000084 > > So, when "cat physical_package" in /sys/devices/system/cpu/cpu0/topology/, > it will output 162(0xA2). And if some items are added before the node > above, the output will change to other value. > > This patch maps the node offset to a logic package id. It maps the first > node offset to 0, the second to 1, and so on. > > Then, it will not output a big value, such as 162 above. And it will > not change when some nodes(Physical package not set) are added. > > And as long as the nodes with Physical package field set in PPTT keeps > the real hardware order, the logic id can map to hardware package id to > some extent. > > Hope to get feedback from you.
I'm assuming this is no longer needed now that we have queued the series from Sudeep? Will
