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Subject[PATCH v8 00/13] Support PPTT for ARM64
Date
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_v8

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.

v6->v7:
Add additional patch to use the last cache level within the NUMA
or socket as the MC domain. This assures the MC domain is
equal or smaller than the DIE.

Various formatting/etc review comments.

Rebase to 4.16rc2

v5->v6:
Add additional patches which re-factor how the initial DT code sets
up the cacheinfo structure so that its not as dependent on the
of_node stored in that tree. Once that is done we rename it
for use with the ACPI code.

Additionally there were a fair number of minor name/location/etc
tweaks scattered about made in response to review comments.

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.

(see previous cover letters for futher changes)

Jeremy Linton (13):
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
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
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 | 103 +++++-
arch/riscv/kernel/cacheinfo.c | 1 -
drivers/acpi/Kconfig | 3 +
drivers/acpi/Makefile | 1 +
drivers/acpi/pptt.c | 678 ++++++++++++++++++++++++++++++++++++++
drivers/acpi/tables.c | 2 +-
drivers/base/cacheinfo.c | 157 ++++-----
include/linux/acpi.h | 4 +
include/linux/cacheinfo.h | 18 +-
13 files changed, 886 insertions(+), 107 deletions(-)
create mode 100644 drivers/acpi/pptt.c

--
2.13.6

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