From: Jeremy Linton <jeremy.linton@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: lorenzo.pieralisi@arm.com, catalin.marinas@arm.com,
rjw@rjwysocki.net, Jeremy Linton <jeremy.linton@arm.com>,
linux-acpi@vger.kernel.org, sudeep.holla@arm.com,
will@kernel.org, lenb@kernel.org
Subject: [PATCH v4 0/2] arm64/PPTT ACPI 6.3 thread flag support
Date: Wed, 31 Jul 2019 22:46:32 -0500 [thread overview]
Message-ID: <20190801034634.26913-1-jeremy.linton@arm.com> (raw)
ACPI 6.3 adds a flag to the CPU node to indicate whether
the given CPU is a thread. Add a function to return that
information for a given linux logical CPU and then utilize
it while building the arm64 topology.
v3->v4: Remove table revision cache as this code path is only
called during boot and there aren't any
indications that it presents a perf issue.
Rebase to 5.3
v2->v3: Clarify and tweak the return from check_acpi_cpu_flag()
Cache the PPTT table revision to avoid repeat
acpi_table_get/put calls in the case of
missing or old PPTT tables.
v1->v2:
Return ENOENT instead on ENONET.
Jeremy Linton (2):
ACPI/PPTT: Add support for ACPI 6.3 thread flag
arm64: topology: Use PPTT to determine if PE is a thread
arch/arm64/kernel/topology.c | 8 ++++--
drivers/acpi/pptt.c | 54 +++++++++++++++++++++++++++++++++++-
include/linux/acpi.h | 5 ++++
3 files changed, 63 insertions(+), 4 deletions(-)
--
2.21.0
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next reply other threads:[~2019-08-01 3:46 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-01 3:46 Jeremy Linton [this message]
2019-08-01 3:46 ` [PATCH v4 1/2] ACPI/PPTT: Add support for ACPI 6.3 thread flag Jeremy Linton
2019-08-01 15:57 ` Sudeep Holla
2019-08-01 16:10 ` Jeremy Linton
2019-08-02 13:05 ` Robert Richter
2019-08-02 15:36 ` Jeremy Linton
2019-08-01 3:46 ` [PATCH v4 2/2] arm64: topology: Use PPTT to determine if PE is a thread Jeremy Linton
2019-08-01 15:58 ` Sudeep Holla
2019-08-02 13:44 ` Robert Richter
2019-08-02 16:04 ` Jeremy Linton
2019-08-08 20:40 [PATCH v4 0/2] arm64/PPTT ACPI 6.3 thread flag support Jeremy Linton
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