[PATCH v4 0/5] irqchip, gicv3: Updates and Cavium ThunderX errata workarounds

From: Robert Richter
Date: Fri Aug 14 2015 - 14:29:12 EST

From: Robert Richter <rrichter@xxxxxxxxxx>

This patch series adds gicv3 updates and workarounds for HW errata in
Cavium's ThunderX GICV3.

The first one is an unchanged resubmission of a patch from a gicv3
series I sent a while ago.

The next patches implement the workarounds for ThunderX's gicv3. Patch
#2 implements the cpu workaround for gicv3 on ThunderX. Patch #3 is a
prerequisit for patch #5. Patch #4 adds generic code to parse the hw
revision provided by an IIDR. This patch is used for the implementa-
tion of the actual gicv3-its workaround in #5.

All current review comments addressed so far with v4.

* simplify code to only use cpus_have_cap() in gicv3_enable_quirks()
* only enable hw detection for its in its_enable_quirks()
* removed gicv3_check_capabilities()
* drop special cpu capability for zero

* use arm64 errata framework for midr check
* fix mixup of errata to be dependend from midr/iidr

* Workaround for 23154:
* implement code in a single asm() to keep instruction sequence
* added comment to the code that explains the erratum
* apply workaround also if running as guest, thus check MIDR
* adding MIDR check

Robert Richter (5):
irqchip, gicv3-its: Add range check for number of allocated pages
irqchip, gicv3: Workaround for Cavium ThunderX erratum 23154
irqchip, gicv3-its: Read typer register outside the loop
irqchip, gicv3-its: Add HW revision detection and configuration
irqchip, gicv3-its: Workaround for Cavium ThunderX errata 22375, 24313

arch/arm64/Kconfig | 11 +++++++
arch/arm64/include/asm/cpufeature.h | 3 +-
arch/arm64/include/asm/cputype.h | 18 ++++++-----
arch/arm64/kernel/cpu_errata.c | 9 ++++++
drivers/irqchip/irq-gic-common.c | 11 +++++++
drivers/irqchip/irq-gic-common.h | 9 ++++++
drivers/irqchip/irq-gic-v3-its.c | 62 +++++++++++++++++++++++++++++++++----
drivers/irqchip/irq-gic-v3.c | 42 ++++++++++++++++++++++++-
include/linux/irqchip/arm-gic-v3.h | 1 +
9 files changed, 151 insertions(+), 15 deletions(-)


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