On systems containing multiple, heterogeneous clusters we need a way to
associate a PMU "device" with the CPU(s) on which it exists. For PMUs
that signal overflow with SPIs, this relationship is determined via the
"interrupt-affinity" property, which contains a list of phandles to CPU
nodes for the PMU. For PMUs using PPIs, the per-cpu nature of the
interrupt isn't enough to determine the set of CPUs which actually
contain the device.
This patch allows the interrupt-affinity property to be specified on a
PMU node irrespective of the interrupt type. For PPIs, it identifies
the set of CPUs signalling the PPI in question.
Tested-by: Stephen Boyd <sboyd@codeaurora.org> # Krait PMU
Signed-off-by: Will Deacon <will.deacon@arm.com>
The main change here is a significant head.S rework that allows us to
boot on machines with physical memory at a really high address without
having to increase our mapped VA range. Other changes include:
- AES performance boost for Cortex-A57
- AArch32 (compat) userspace with 64k pages
- Cortex-A53 erratum workaround for #845719
- defconfig updates (new platforms, PCI, ...)
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon:
"Here are the core arm64 updates for 4.1.
Highlights include a significant rework to head.S (allowing us to boot
on machines with physical memory at a really high address), an AES
performance boost on Cortex-A57 and the ability to run a 32-bit
userspace with 64k pages (although this requires said userspace to be
built with a recent binutils).
The head.S rework spilt over into KVM, so there are some changes under
arch/arm/ which have been acked by Marc Zyngier (KVM co-maintainer).
In particular, the linker script changes caused us some issues in
-next, so there are a few merge commits where we had to apply fixes on
top of a stable branch.
Other changes include:
- AES performance boost for Cortex-A57
- AArch32 (compat) userspace with 64k pages
- Cortex-A53 erratum workaround for #845719
- defconfig updates (new platforms, PCI, ...)"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (39 commits)
arm64: fix midr range for Cortex-A57 erratum 832075
arm64: errata: add workaround for cortex-a53 erratum #845719
arm64: Use bool function return values of true/false not 1/0
arm64: defconfig: updates for 4.1
arm64: Extract feature parsing code from cpu_errata.c
arm64: alternative: Allow immediate branch as alternative instruction
arm64: insn: Add aarch64_insn_decode_immediate
ARM: kvm: round HYP section to page size instead of log2 upper bound
ARM: kvm: assert on HYP section boundaries not actual code size
arm64: head.S: ensure idmap_t0sz is visible
arm64: pmu: add support for interrupt-affinity property
dt: pmu: extend ARM PMU binding to allow for explicit interrupt affinity
arm64: head.S: ensure visibility of page tables
arm64: KVM: use ID map with increased VA range if required
arm64: mm: increase VA range of identity map
ARM: kvm: implement replacement for ld's LOG2CEIL()
arm64: proc: remove unused cpu_get_pgd macro
arm64: enforce x1|x2|x3 == 0 upon kernel entry as per boot protocol
arm64: remove __calc_phys_offset
arm64: merge __enable_mmu and __turn_mmu_on
...
The current ARM PMU binding relies on the PMU interrupts being listed in
CPU logical order, which the device-tree author simply cannot know
anything about.
This patch introduces a new "interrupt-affinity" property, which makes
the relationship between the PMU interrupts and their corresponding
CPU explicit.
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Scorpion supports a set of local performance monitor event
selection registers (LPM) sitting behind a cp15 based interface
that extend the architected PMU events to include Scorpion CPU
and Venum VFP specific events. To use these events the user is
expected to program the lpm register with the event code shifted
into the group they care about and then point the PMNx event at
that region+group combo by writing a LPMn_GROUPx event. Add
support for this hardware.
Note: the raw event number is a pure software construct that
allows us to map the multi-dimensional number space of regions,
groups, and event codes into a flat event number space suitable
for use by the perf framework.
This is based on code originally written by Sheetal Sahasrabudhe,
Ashwin Chaugule, and Neil Leeder [1].
[1] https://www.codeaurora.org/cgit/quic/la/kernel/msm/tree/arch/arm/kernel/perf_event_msm.c?h=msm-3.4
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Neil Leeder <nleeder@codeaurora.org>
Cc: Ashwin Chaugule <ashwinc@codeaurora.org>
Cc: Sheetal Sahasrabudhe <sheetals@codeaurora.org>
Cc: <devicetree@vger.kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
The Cortex-A17 PMU is identical to that of the A12, so wire up a new
compatible string to the existing event structures.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cortex-A12 implements Performance Monitors compliant with the PMUv2
architecture.
This patch adds support for the Cortex-A12 PMU to the ARM perf backend.
Signed-off-by: Albin Tonnerre <albin.tonnerre@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This patch adds separate devicetree bindings for 11MPcore and
Cortex-{A5,A7,A15} PMUs in preparation for improved devicetree parsing
in the ARM perf-event CPU PMU driver.
Cc: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This is based on an earlier patch from Rob Herring <rob.herring@calxeda.com>
> Add OF match table to enable OF style driver binding. The dts entry is like
> this:
>
> pmu {
> compatible = "arm,cortex-a9-pmu";
> interrupts = <100 101>;
> };
>
> The use of pdev->id as an index breaks with OF device binding, so set the type
> based on the OF compatible string.
This modification sets the PMU hardware type based on data embedded in the
binding, allowing easy addition of new PMU types in future.
Support for new PMU types not provided by devicetree can be added later using
platform_device_id tables in a similar fashion.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Jamie Iles <jamie@jamieiles.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
