This patch set is dependent on "[14/15] ACPICA: ACPI 6.2: Additional PPTT flags" https://patchwork.kernel.org/patch/10064191/ 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. 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_v5 v4->v5: Update the cache type from NOCACHE to UNIFIED when all the cache attributes we update are valid. This fixes a problem where caches which are entirely created by the PPTT don't show up in lstopo. Give the PPTT its own firmware_node in the cache structure instead of sharing it with the of_node. Move some pieces around between patches. v3->v4: Suppress the "Found duplicate cache level/type..." message if the duplicate cache entry is actually a duplicate node. This allows cases like L1I and L1D nodes that point at the same L2 node to be accepted without the warning. Remove cluster/physical split code. Add a patch to rename cluster_id so that its clear the topology may not be referring to a cluster. Add additional ACPICA patch for the PPTT cache properties. This matches an outstanding ACPICA pull that should be merged in the near future. Replace a number of (struct*)((u8*)ptr+offset) constructs with ACPI_ADD_PTR Split out the topology parsing into an additional patch. Tweak the cpu topology code to terminate on either a level, or a flag. Add an additional function which retrives the physical package id for a given cpu. Various other comments/tweaks. v2->v3: Remove valid bit check on leaf nodes. Now simply being a leaf node is sufficient to verify the processor id against the ACPI processor ids (gotten from MADT). Use the acpi processor for the "level 0" Id. This makes the /sys visible core/thread ids more human readable if the firmware uses small consecutive values for processor ids. Added PPTT to the list of injectable ACPI tables. Fix bug which kept the code from using the processor node as intended in v2, caused by misuse of git rebase/fixup. v1->v2: The parser keys off the acpi_pptt_processor node to determine unique cache's rather than the acpi_pptt_cache referenced by the processor node. This allows PPTT tables which "share" cache nodes across cpu nodes despite not being a shared cache. Jeremy Linton (9): 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 ACPI/PPTT: Add topology parsing code arm64: Topology, rename cluster_id arm64: topology: Enable ACPI/PPTT based CPU topology. ACPI: Add PPTT to injectable table list arch/arm64/Kconfig | 1 + arch/arm64/include/asm/acpi.h | 4 + arch/arm64/include/asm/topology.h | 4 +- arch/arm64/kernel/cacheinfo.c | 15 +- arch/arm64/kernel/topology.c | 74 ++++- drivers/acpi/Kconfig | 3 + drivers/acpi/Makefile | 1 + drivers/acpi/pptt.c | 592 ++++++++++++++++++++++++++++++++++++++ drivers/acpi/tables.c | 3 +- drivers/base/cacheinfo.c | 20 +- include/linux/cacheinfo.h | 13 +- include/linux/topology.h | 2 + 12 files changed, 703 insertions(+), 29 deletions(-) create mode 100644 drivers/acpi/pptt.c -- 2.13.5 -- 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
