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 package_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. Finally, we update the scheduler MC domain so that it generally reflects the LLC unless the LLC is too large for the NUMA domain (or package). For example on juno: [root@mammon-juno-rh topology]# lstopo-no-graphics Package L#0 L2 L#0 (1024KB) L1d L#0 (32KB) + L1i L#0 (32KB) + Core L#0 + PU L#0 (P#0) L1d L#1 (32KB) + L1i L#1 (32KB) + Core L#1 + PU L#1 (P#1) L1d L#2 (32KB) + L1i L#2 (32KB) + Core L#2 + PU L#2 (P#2) L1d L#3 (32KB) + L1i L#3 (32KB) + Core L#3 + PU L#3 (P#3) L2 L#1 (2048KB) L1d L#4 (32KB) + L1i L#4 (48KB) + Core L#4 + PU L#4 (P#4) L1d L#5 (32KB) + L1i L#5 (48KB) + Core L#5 + PU L#5 (P#5) HostBridge L#0 PCIBridge PCIBridge PCIBridge PCI 1095:3132 Block(Disk) L#0 "sda" PCIBridge PCI 1002:68f9 GPU L#1 "renderD128" GPU L#2 "card0" GPU L#3 "controlD64" PCIBridge PCI 11ab:4380 Net L#4 "enp8s0" Git tree at: http://linux-arm.org/git?p=linux-jlinton.git branch: pptt_v9 v8->v9: Add further ack/tested by's (thanks everyone) kerneldoc, general comment and patch description tweaks. Squash the pptt.c module (#5 & #13) back together. remove a redundant () in an if, and rename a variable. v7->v8: Modify the logic used to select the MC domain (the change shouldn't modify the sched domains on any existing machines compared to v7, only how they are built) Reduce the severity of some parsing messages. Fix s390 link problem. Further checks to deal with broken PPTT tables. Various style tweaks, SPDX license addition, etc. (see previous cover letters for further changes) Jeremy Linton (12): drivers: base: cacheinfo: move cache_setup_of_node() drivers: base: cacheinfo: setup DT cache properties early cacheinfo: rename of_node to fw_token arm64/acpi: Create arch specific cpu to acpi id helper ACPI/PPTT: Add Processor Properties Topology Table parsing ACPI: Enable PPTT support on ARM64 drivers: base cacheinfo: Add support for ACPI based firmware tables arm64: Add support for ACPI based firmware tables arm64: topology: rename cluster_id arm64: topology: enable ACPI/PPTT based CPU topology ACPI: Add PPTT to injectable table list arm64: topology: divorce MC scheduling domain from core_siblings arch/arm64/Kconfig | 1 + arch/arm64/include/asm/acpi.h | 4 + arch/arm64/include/asm/topology.h | 6 +- arch/arm64/kernel/cacheinfo.c | 15 +- arch/arm64/kernel/topology.c | 107 ++++++- arch/riscv/kernel/cacheinfo.c | 1 - drivers/acpi/Kconfig | 3 + drivers/acpi/Makefile | 1 + drivers/acpi/pptt.c | 655 ++++++++++++++++++++++++++++++++++++++ drivers/acpi/tables.c | 2 +- drivers/base/cacheinfo.c | 157 ++++----- include/linux/acpi.h | 4 + include/linux/cacheinfo.h | 25 +- 13 files changed, 874 insertions(+), 107 deletions(-) create mode 100644 drivers/acpi/pptt.c -- 2.13.6 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html