== Changes since v6 == Updated to linux-next, which has a change to the HMAT structures to account for ACPI revision 6.3. Changed memory-side cache "associativity" attribute to "indexing" Regarding the Kconfig, I am having the implementation specific as a user selectable option, and the generic interface, HMEM_REPORTING, is not a user prompt. I just wanted to clarify the point that there's only one. == Background == Platforms may provide multiple types of cpu attached system memory. The memory ranges for each type may have different characteristics that applications may wish to know about when considering what node they want their memory allocated from. It had previously been difficult to describe these setups as memory rangers were generally lumped into the NUMA node of the CPUs. New platform attributes have been created and in use today that describe the more complex memory hierarchies that can be created. This series' objective is to provide the attributes from such systems that are useful for applications to know about, and readily usable with existing tools and libraries. Those applications may query performance attributes relative to a particular CPU they're running on in order to make more informed choices for where they want to allocate hot and cold data. This works with mbind() or the numactl library. Keith Busch (10): acpi: Create subtable parsing infrastructure acpi: Add HMAT to generic parsing tables acpi/hmat: Parse and report heterogeneous memory node: Link memory nodes to their compute nodes node: Add heterogenous memory access attributes node: Add memory-side caching attributes acpi/hmat: Register processor domain to its memory acpi/hmat: Register performance attributes acpi/hmat: Register memory side cache attributes doc/mm: New documentation for memory performance Documentation/ABI/stable/sysfs-devices-node | 87 +++- Documentation/admin-guide/mm/numaperf.rst | 164 +++++++ arch/arm64/kernel/acpi_numa.c | 2 +- arch/arm64/kernel/smp.c | 4 +- arch/ia64/kernel/acpi.c | 14 +- arch/x86/kernel/acpi/boot.c | 36 +- drivers/acpi/Kconfig | 1 + drivers/acpi/Makefile | 1 + drivers/acpi/hmat/Kconfig | 11 + drivers/acpi/hmat/Makefile | 1 + drivers/acpi/hmat/hmat.c | 670 ++++++++++++++++++++++++++ drivers/acpi/numa.c | 16 +- drivers/acpi/scan.c | 4 +- drivers/acpi/tables.c | 76 ++- drivers/base/Kconfig | 8 + drivers/base/node.c | 352 +++++++++++++- drivers/irqchip/irq-gic-v2m.c | 2 +- drivers/irqchip/irq-gic-v3-its-pci-msi.c | 2 +- drivers/irqchip/irq-gic-v3-its-platform-msi.c | 2 +- drivers/irqchip/irq-gic-v3-its.c | 6 +- drivers/irqchip/irq-gic-v3.c | 10 +- drivers/irqchip/irq-gic.c | 4 +- drivers/mailbox/pcc.c | 2 +- include/linux/acpi.h | 6 +- include/linux/node.h | 72 ++- 25 files changed, 1487 insertions(+), 66 deletions(-) create mode 100644 Documentation/admin-guide/mm/numaperf.rst create mode 100644 drivers/acpi/hmat/Kconfig create mode 100644 drivers/acpi/hmat/Makefile create mode 100644 drivers/acpi/hmat/hmat.c -- 2.14.4
