linux-kernel - [RFC 0/3] arm64: SPE ACPI enablement

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Date:   Fri,  8 Feb 2019 18:47:15 -0600
From:   Jeremy Linton <jeremy.linton@....com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        devel@...ica.org, catalin.marinas@....com, will.deacon@....com,
        mark.rutland@....com, robert.moore@...el.com,
        erik.schmauss@...el.com, rafael.j.wysocki@...el.com,
        lenb@...nel.org, Jeremy Linton <jeremy.linton@....com>
Subject: [RFC  0/3] arm64: SPE ACPI enablement

This patch series enables the Arm Statistical
Profiling Extension (SPE) on ACPI platforms.

This is possible because ACPI 6.3 uses a previously
reserved field in the MADT to store the SPE interrupt
number, similarly to how the normal PMU is
described. If a consistent valid interrupt exists
across all the cores in the system, a platform
device is registered. That then triggers the SPE module,
which runs as normal.

Jeremy Linton (3):
  ACPICA: ACPI 6.3: Add MADT/GICC/SPE extension.
  arm_pmu: acpi: spe: Add initial MADT/SPE probing
  perf: arm_spe: Enable ACPI/Platform automatic module loading

 arch/arm64/include/asm/acpi.h |  4 +++
 drivers/perf/arm_pmu_acpi.c   | 67 +++++++++++++++++++++++++++++++++++
 drivers/perf/arm_spe_pmu.c    | 11 ++++--
 include/acpi/actbl2.h         |  5 +--
 4 files changed, 83 insertions(+), 4 deletions(-)

-- 
2.17.2