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Use a more generic form for __section that requires quotes to avoid
complications with clang and gcc differences.
Remove the quote operator # from compiler_attributes.h __section macro.
Convert all unquoted __section(foo) uses to quoted __section("foo").
Also convert __attribute__((section("foo"))) uses to __section("foo")
even if the __attribute__ has multiple list entry forms.
Conversion done using the script at:
https://lore.kernel.org/lkml/75393e5ddc272dc7403de74d645e6c6e0f4e70eb.camel@perches.com/2-convert_section.pl
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@gooogle.com>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull ARM SoC platform updates from Olof Johansson:
"SoC changes, a substantial part of this is cleanup of some of the
older platforms that used to have a bunch of board files.
In particular:
- Remove non-DT i.MX platforms that haven't seen activity in years,
it's time to remove them.
- A bunch of cleanup and removal of platform data for TI/OMAP
platforms, moving over to genpd for power/reset control (yay!)
- Major cleanup of Samsung S3C24xx and S3C64xx platforms, moving them
closer to multiplatform support (not quite there yet, but getting
close).
There are a few other changes too, smaller fixlets, etc. For new
platform support, the primary ones are:
- New SoC: Hisilicon SD5203, ARM926EJ-S platform.
- Cpufreq support for i.MX7ULP"
* tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (121 commits)
ARM: mstar: Select MStar intc
ARM: stm32: Replace HTTP links with HTTPS ones
ARM: debug: add UART early console support for SD5203
ARM: hisi: add support for SD5203 SoC
ARM: omap3: enable off mode automatically
clk: imx: imx35: Remove mx35_clocks_init()
clk: imx: imx31: Remove mx31_clocks_init()
clk: imx: imx27: Remove mx27_clocks_init()
ARM: imx: Remove unused definitions
ARM: imx35: Retrieve the IIM base address from devicetree
ARM: imx3: Retrieve the AVIC base address from devicetree
ARM: imx3: Retrieve the CCM base address from devicetree
ARM: imx31: Retrieve the IIM base address from devicetree
ARM: imx27: Retrieve the CCM base address from devicetree
ARM: imx27: Retrieve the SYSCTRL base address from devicetree
ARM: s3c64xx: bring back notes from removed debug-macro.S
ARM: s3c24xx: fix Wunused-variable warning on !MMU
ARM: samsung: fix PM debug build with DEBUG_LL but !MMU
MAINTAINERS: mark linux-samsung-soc list non-moderated
ARM: imx: Remove remnant board file support pieces
...
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https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into arm/soc
Samsung S3C24xx and S3C64xx machine code cleanup for v5.10
Big cleanup for the Samsung S3C24xx and S3C64xx platforms, although it
also touches files shared with S5Pv210 and Exynos. This is mostly Arnd
Bergmann work which Krzysztof Kozlowski took over, rebased and polished.
The goal is to cleanup, merge and finally make the Samsung S3C24xx and
S3C64xx architectures multiplatform. The multiplatform did not happen
yet here - just cleaning up and merging into one arch/arm/mach-s3c
directory. However this is step forward for multiplatform or at least
to keep this code still maintainable.
This pulls also branch with changes for Samsung SoC sound drivers from
broonie/sound because the cleanups there were part of this series and
all further patches depend on them.
* tag 'samsung-soc-s3c-5.10' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux: (62 commits)
ARM: s3c: Avoid naming clash of S3C24xx and S3C64xx timer setup
ARM: s3c: Cleanup from old plat-samsung include
ARM: s3c: make headers local if possible
ARM: s3c: move into a common directory
ARM: s3c24xx: stop including mach/hardware.h from mach/io.h
cpufreq: s3c24xx: move low-level clk reg access into platform code
cpufreq: s3c2412: use global s3c2412_cpufreq_setrefresh
ARM: s3c: remove cpufreq header dependencies
cpufreq: s3c24xx: split out registers
fbdev: s3c2410fb: remove mach header dependency
ARM: s3c24xx: bast: avoid irq_desc array usage
ARM: s3c24xx: spi: avoid hardcoding fiq number in driver
ARM: s3c24xx: include mach/irqs.h where needed
ARM: s3c24xx: move s3cmci pinctrl handling into board files
ARM: s3c24xx: move iis pinctrl config into boards
ARM: s3c24xx: move spi fiq handler into platform
ARM: s3c: adc: move header to linux/soc/samsung
ARM: s3c24xx: move irqchip driver back into platform
ARM: s3c24xx: move regs-spi.h into spi driver
ARM: s3c64xx: remove mach/hardware.h
...
Link: https://lore.kernel.org/r/20200831154751.7551-1-krzk@kernel.org
Signed-off-by: Olof Johansson <olof@lixom.net>
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It was a good idea to move it out at first, but the irqchip code
is still tightly connected to the s3c24xx platform code and uses
multiple internal header files, so just move it back for the
time being to avoid those dependencies.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200806182059.2431-21-krzk@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD updates from Lee Jones:
"New Drivers:
- Add support for initialising shared (between children) Regmaps
- Add support for Kontron SL28CPLD
- Add support for ENE KB3930 Embedded Controller
- Add support for Intel FPGA PAC MAX 10 BMC
New Device Support:
- Add support for Power to Ricoh RN5T618
- Add support for UART to Intel Lakefield
- Add support for LP87524_Q1 to Texas Instruments LP87565
New Functionality:
- Device Tree; ene-kb3930, sl28cpld, syscon, lp87565, lp87524-q1
- Use new helper dev_err_probe(); madera-core, stmfx, wcd934x
- Use new GPIOD API; dm355evm_msp
- Add wake-up capability; sprd-sc27xx-spi
- Add ACPI support; kempld-core
Fix-ups:
- Trivial (spelling/whitespace); Kconfig, ab8500
- Fix for unused variables; khadas-mcu, kempld-core
- Remove unused header file(s); mt6360-core
- Use correct IRQ flags in docs; act8945a, gateworks-gsc, rohm,bd70528-pmic
- Add COMPILE_TEST support; asic3, tmio_core
- Add dependency on I2C; SL28CPLD
Bug Fixes:
- Fix memory leak(s); sm501
- Do not free regmap_config's 'name' until exit; syscon"
* tag 'mfd-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (34 commits)
mfd: kempld-core: Fix unused variable 'kempld_acpi_table' when !ACPI
mfd: sl28cpld: Depend on I2C
mfd: asic3: Build if COMPILE_TEST=y
dt-bindings: mfd: Correct interrupt flags in examples
mfd: Add ACPI support to Kontron PLD driver
mfd: intel-m10-bmc: Add Intel MAX 10 BMC chip support for Intel FPGA PAC
mfd: lp87565: Add LP87524-Q1 variant
dt-bindings: mfd: Add LP87524-Q1
dt-bindings: mfd: lp87565: Convert to yaml
mfd: mt6360: Remove unused include <linux/version.h>
mfd: sm501: Fix leaks in probe()
mfd: syscon: Don't free allocated name for regmap_config
dt-bindings: mfd: syscon: Document Exynos3 and Exynos5433 compatibles
dt-bindings: mfd: syscon: Merge Samsung Exynos Sysreg bindings
dt-bindings: mfd: ab8500: Remove weird Unicode characters
mfd: sprd: Add wakeup capability for PMIC IRQ
mfd: intel-lpss: Add device IDs for UART ports for Lakefield
mfd: dm355evm_msp: Convert LEDs to GPIO descriptor table
mfd: wcd934x: Simplify with dev_err_probe()
mfd: stmfx: Simplify with dev_err_probe()
...
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Add support for the interrupt controller inside the sl28 CPLD management
controller.
The interrupt controller can handle at most 8 interrupts and is really
simplistic and consists only of an interrupt mask and an interrupt
pending register.
Signed-off-by: Michael Walle <michael@walle.cc>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI updates from Rafael Wysocki:
"These add support for generic initiator-only proximity domains to the
ACPI NUMA code and the architectures using it, clean up some
non-ACPICA code referring to debug facilities from ACPICA, reduce the
overhead related to accessing GPE registers, add a new DPTF (Dynamic
Power and Thermal Framework) participant driver, update the ACPICA
code in the kernel to upstream revision 20200925, add a new ACPI
backlight whitelist entry, fix a few assorted issues and clean up some
code.
Specifics:
- Add support for generic initiator-only proximity domains to the
ACPI NUMA code and the architectures using it (Jonathan Cameron)
- Clean up some non-ACPICA code referring to debug facilities from
ACPICA that are not actually used in there (Hanjun Guo)
- Add new DPTF driver for the PCH FIVR participant (Srinivas
Pandruvada)
- Reduce overhead related to accessing GPE registers in ACPICA and
the OS interface layer and make it possible to access GPE registers
using logical addresses if they are memory-mapped (Rafael Wysocki)
- Update the ACPICA code in the kernel to upstream revision 20200925
including changes as follows:
+ Add predefined names from the SMBus sepcification (Bob Moore)
+ Update acpi_help UUID list (Bob Moore)
+ Return exceptions for string-to-integer conversions in iASL (Bob
Moore)
+ Add a new "ALL <NameSeg>" debugger command (Bob Moore)
+ Add support for 64 bit risc-v compilation (Colin Ian King)
+ Do assorted cleanups (Bob Moore, Colin Ian King, Randy Dunlap)
- Add new ACPI backlight whitelist entry for HP 635 Notebook (Alex
Hung)
- Move TPS68470 OpRegion driver to drivers/acpi/pmic/ and split out
Kconfig and Makefile specific for ACPI PMIC (Andy Shevchenko)
- Clean up the ACPI SoC driver for AMD SoCs (Hanjun Guo)
- Add missing config_item_put() to fix refcount leak (Hanjun Guo)
- Drop lefrover field from struct acpi_memory_device (Hanjun Guo)
- Make the ACPI extlog driver check for RDMSR failures (Ben
Hutchings)
- Fix handling of lid state changes in the ACPI button driver when
input device is closed (Dmitry Torokhov)
- Fix several assorted build issues (Barnabás Pőcze, John Garry,
Nathan Chancellor, Tian Tao)
- Drop unused inline functions and reduce code duplication by using
kobj_to_dev() in the NFIT parsing code (YueHaibing, Wang Qing)
- Serialize tools/power/acpi Makefile (Thomas Renninger)"
* tag 'acpi-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (64 commits)
ACPICA: Update version to 20200925 Version 20200925
ACPICA: Remove unnecessary semicolon
ACPICA: Debugger: Add a new command: "ALL <NameSeg>"
ACPICA: iASL: Return exceptions for string-to-integer conversions
ACPICA: acpi_help: Update UUID list
ACPICA: Add predefined names found in the SMBus sepcification
ACPICA: Tree-wide: fix various typos and spelling mistakes
ACPICA: Drop the repeated word "an" in a comment
ACPICA: Add support for 64 bit risc-v compilation
ACPI: button: fix handling lid state changes when input device closed
tools/power/acpi: Serialize Makefile
ACPI: scan: Replace ACPI_DEBUG_PRINT() with pr_debug()
ACPI: memhotplug: Remove 'state' from struct acpi_memory_device
ACPI / extlog: Check for RDMSR failure
ACPI: Make acpi_evaluate_dsm() prototype consistent
docs: mm: numaperf.rst Add brief description for access class 1.
node: Add access1 class to represent CPU to memory characteristics
ACPI: HMAT: Fix handling of changes from ACPI 6.2 to ACPI 6.3
ACPI: Let ACPI know we support Generic Initiator Affinity Structures
x86: Support Generic Initiator only proximity domains
...
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processor or memory
Note this crash is present before any of the patches in this series, but
as explained below it is highly unlikely anyone is shipping a firmware that
causes it. Tests were done using an overriden SRAT.
On ARM64, the gic-v3 driver directly parses SRAT to locate GIC Interrupt
Translation Service (ITS) Affinity Structures. This is done much later
in the boot than the parses of SRAT which identify proximity domains.
As a result, an ITS placed in a proximity domain that is not defined by
another SRAT structure will result in a NUMA node that is not completely
configured and a crash.
ITS [mem 0x202100000-0x20211ffff]
ITS@0x0000000202100000: Using ITS number 0
Unable to handle kernel paging request at virtual address 0000000000001a08
...
Call trace:
__alloc_pages_nodemask+0xe8/0x338
alloc_pages_node.constprop.0+0x34/0x40
its_probe_one+0x2f8/0xb18
gic_acpi_parse_madt_its+0x108/0x150
acpi_table_parse_entries_array+0x17c/0x264
acpi_table_parse_entries+0x48/0x6c
acpi_table_parse_madt+0x30/0x3c
its_init+0x1c4/0x644
gic_init_bases+0x4b8/0x4ec
gic_acpi_init+0x134/0x264
acpi_match_madt+0x4c/0x84
acpi_table_parse_entries_array+0x17c/0x264
acpi_table_parse_entries+0x48/0x6c
acpi_table_parse_madt+0x30/0x3c
__acpi_probe_device_table+0x8c/0xe8
irqchip_init+0x3c/0x48
init_IRQ+0xcc/0x100
start_kernel+0x33c/0x548
ACPI 6.3 allows any set of Affinity Structures in SRAT to define a proximity
domain. However, as we do not see this crash, we can conclude that no
firmware is currently placing an ITS in a node that is separate from
those containing memory and / or processors.
We could modify the SRAT parsing behavior to identify the existence
of Proximity Domains unique to the ITS structures, and handle them as
a special case of a generic initiator (once support for those merges).
This patch avoids the complexity that would be needed to handle this corner
case, by not allowing the ITS entry parsing code to instantiate new NUMA
Nodes. If one is encountered that does not already exist, then NO_NUMA_NODE
is assigned and a warning printed just as if the value had been greater than
allowed NUMA Nodes.
"SRAT: Invalid NUMA node -1 in ITS affinity"
Whilst this does not provide the full flexibility allowed by ACPI,
it does fix the problem. We can revisit a more sophisticated solution if
needed by future platforms.
Change is simply to replace acpi_map_pxm_to_node with pxm_to_node reflecting
the fact a new mapping is not created.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Iteration over memblock.reserved with for_each_reserved_mem_region() used
__next_reserved_mem_region() that implemented a subset of
__next_mem_region().
Use __for_each_mem_range() and, essentially, __next_mem_region() with
appropriate parameters to reduce code duplication.
While on it, rename for_each_reserved_mem_region() to
for_each_reserved_mem_range() for consistency.
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com> [.clang-format]
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Daniel Axtens <dja@axtens.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Emil Renner Berthing <kernel@esmil.dk>
Cc: Hari Bathini <hbathini@linux.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: https://lkml.kernel.org/r/20200818151634.14343-17-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Signed-off-by: Marc Zyngier <maz@kernel.org>
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Add MStar interrupt controller support using hierarchy irq
domain.
Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Daniel Palmer <daniel@thingy.jp>
Link: https://lore.kernel.org/r/20200902063344.1852-2-mark-pk.tsai@mediatek.com
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Signed-off-by: Marc Zyngier <maz@kernel.org>
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In htvec_reset() only the first group of initial interrupts is cleared.
This sometimes causes spurious interrupts, so let's clear all groups.
While at it, fix the nearby comment that to match the reality of what
the driver does.
Fixes: 818e915fbac518e8c78e1877 ("irqchip: Add Loongson HyperTransport Vector support")
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/1599819978-13999-2-git-send-email-chenhc@lemote.com
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ti_sci_intr_xlate_irq() return -ENOENT on fail, p_hwirq
should be int type.
Fixes: a5b659bd4bc7 ("irqchip/ti-sci-intr: Add support for INTR being a parent to INTR")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Lokesh Vutla <lokeshvutla@ti.com>
Link: https://lore.kernel.org/r/20200826035321.18620-1-yuehaibing@huawei.com
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ti_sci_inta_xlate_irq() return -ENOENT on fail, p_hwirq
should be int type.
Fixes: 5c4b585d2910 ("irqchip/ti-sci-inta: Add support for INTA directly connecting to GIC")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Lokesh Vutla <lokeshvutla@ti.com>
Link: https://lore.kernel.org/r/20200826035430.21060-1-yuehaibing@huawei.com
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Signed-off-by: Marc Zyngier <maz@kernel.org>
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Kexec can directly boot into a new kernel without going to complete
reboot. This can leave the previous kernel's configuration for PDC
interrupts as is.
Clear previous kernel's configuration during init by setting interrupts
in enable bank to zero. The IRQs specified in qcom,pdc-ranges property
are the only ones that can be used by the new kernel so clear only those
IRQs. The remaining ones may be in use by a different kernel and should
not be set by new kernel.
Suggested-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/1601267524-20199-7-git-send-email-mkshah@codeaurora.org
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Set IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag to enable/unmask the
wakeirqs during suspend entry.
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/1601267524-20199-6-git-send-email-mkshah@codeaurora.org
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'origin/irq/owl' into irq/irqchip-next
Signed-off-by: Marc Zyngier <maz@kernel.org>
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This interrupt controller is found in the Actions Semi Owl SoCs (S500,
S700 and S900) and provides support for handling up to 3 external
interrupt lines.
Each line can be independently configured as interrupt and triggers on
either of the edges or either of the levels. Additionally, each line
can also be masked individually.
Co-developed-by: Parthiban Nallathambi <pn@denx.de>
Co-developed-by: Saravanan Sekar <sravanhome@gmail.com>
Signed-off-by: Parthiban Nallathambi <pn@denx.de>
Signed-off-by: Saravanan Sekar <sravanhome@gmail.com>
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1a010ef0eb78831b5657d74a0fcdef7a8efb2ec4.1600114378.git.cristian.ciocaltea@gmail.com
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Add support to use dw-apb-ictl as primary interrupt controller.
Suggested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
[maz: minor fixups]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Haoyu Lv <lvhaoyu@huawei.com>
Link: https://lore.kernel.org/r/20200924071754.4509-4-thunder.leizhen@huawei.com
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Add the required abstractions that will help introducing hierarchical
domain support to the dw-apb-ictl driver.
No functional change.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
[maz: commit message, some cleanups]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Haoyu Lv <lvhaoyu@huawei.com>
Link: https://lore.kernel.org/r/20200924071754.4509-3-thunder.leizhen@huawei.com
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Signed-off-by: Marc Zyngier <maz@kernel.org>
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The GIC irqchips can now use a HW resend when a retrigger is invoked by
check_irq_resend(). However, should the HW resend fail, check_irq_resend()
will still attempt to trigger a SW resend, which is still a bad idea for
the GICs.
Prevent this from happening by setting IRQD_HANDLE_ENFORCE_IRQCTX on all
GIC IRQs. Technically per-cpu IRQs do not need this, as their flow handlers
never set IRQS_PENDING, but this aligns all IRQs wrt context enforcement:
this also forces all GIC IRQ handling to happen in IRQ context (as defined
by in_irq()).
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200730170321.31228-3-valentin.schneider@arm.com
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It is pretty easy to provide a retrigger callback for the ITS,
as it we already have the required support in terms of
irq_set_irqchip_state().
Note that this only works for device-generated LPIs, and not
the GICv4 doorbells, which should never have to be retriggered
anyway.
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
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While digging around IRQCHIP_EOI_IF_HANDLED and irq/resend.c, it has come
to my attention that the IRQ resend situation seems a bit precarious for
the GIC(s).
When marking an IRQ with IRQS_PENDING, handle_fasteoi_irq() will bail out
and issue an irq_eoi(). Should the IRQ in question be re-enabled,
check_irq_resend() will trigger a SW resend, which will go through the flow
handler again and issue *another* irq_eoi() on the *same* IRQ
activation. This is something the GIC spec clearly describes as a bad idea:
any EOI must match a previous ACK.
Implement irq_chip.irq_retrigger() for the GIC chips by setting the GIC
pending bit of the relevant IRQ. After being called by check_irq_resend(),
this will eventually trigger a *new* interrupt which we will handle as usual.
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200730170321.31228-2-valentin.schneider@arm.com
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Signed-off-by: Marc Zyngier <maz@kernel.org>
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Introduce a static key identifying Samsung's unique creation, allowing
to replace the indirect call to compute the base addresses with
a simple test on the static key.
Faster, cheaper, negative diffstat.
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
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Although it doesn't seem possible to disable individual mailbox
interrupts, we still need to provide some callbacks.
Fixes: 09eb672ce4fb ("irqchip/bcm2836: Configure mailbox interrupts as standard interrupts")
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
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To introduce IPIs as standard interrupts to the Armada 370-XP
driver, let's allocate a completely separate irqdomain and
irqchip combo that lives parallel to the "standard" one.
This effectively should be modelled as a chained interrupt
controller, but the code is in such a state that it is
pretty hard to shoehorn, as it would require the rewrite
of the MSI layer as well.
Signed-off-by: Marc Zyngier <maz@kernel.org>
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In order to switch the hip04 driver to provide standard interrupts
for IPIs, rework the way interrupts are allocated, making sure
the irqdomain covers the SGIs as well as the rest of the interrupt
range.
The driver is otherwise so old-school that it creates all interrupts
upfront (duh!), so there is hardly anything else to change, apart
from communicating the IPIs to the arch code.
Signed-off-by: Marc Zyngier <maz@kernel.org>
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In order to switch the bcm2836 driver to privide standard interrupts
for IPIs, it first needs to stop lying about the way things work.
The mailbox interrupt is actually a multiplexer, with enough
bits to store 32 pending interrupts per CPU. So let's turn it
into a chained irqchip.
Once this is done, we can instanciate the corresponding IPIs,
and pass them to the architecture code.
Signed-off-by: Marc Zyngier <maz@kernel.org>
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The architecture code now enables the IPIs as required, so no
need to enable SGIs by default in the GIC code.
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
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Change the way we deal with GIC SGIs by turning them into proper
IRQs, and calling into the arch code to register the interrupt range
instead of a callback.
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
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As we are about to change quite a lot of the SMP support code,
let's start by moving it around so that it minimizes the amount
of #ifdefery.
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
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Change the way we deal with GICv3 SGIs by turning them into proper
IRQs, and calling into the arch code to register the interrupt range
instead of a callback.
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
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As we are about to start making use of SGIs in a more conventional
way, let's describe it is the GICv3 list of interrupt types.
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
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Signed-off-by: Marc Zyngier <maz@kernel.org>
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The GIC's internal view of the priority mask register and the assigned
interrupt priorities are based on whether GIC security is enabled and
whether firmware routes Group 0 interrupts to EL3. At the moment, we
support priority masking when ICC_PMR_EL1 and interrupt priorities are
either both modified by the GIC, or both left unchanged.
Trusted Firmware-A's default interrupt routing model allows Group 0
interrupts to be delivered to the non-secure world (SCR_EL3.FIQ == 0).
Unfortunately, this is precisely the case that the GIC driver doesn't
support: ICC_PMR_EL1 remains unchanged, but the GIC's view of interrupt
priorities is different from the software programmed values.
Support pseudo-NMIs when SCR_EL3.FIQ == 0 by using a different value to
mask regular interrupts. All the other values remain the same.
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200912153707.667731-3-alexandru.elisei@arm.com
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When NMIs cannot be enabled, the driver prints a message stating that
unambiguously. When they are enabled, the only feedback we get is a message
regarding the use of synchronization for ICC_PMR_EL1 writes, which is not
as useful for a user who is not intimately familiar with how NMIs are
implemented.
Let's make it obvious that pseudo-NMIs are enabled. Keep the message about
using a barrier for ICC_PMR_EL1 writes, because it has a non-negligible
impact on performance.
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200912153707.667731-2-alexandru.elisei@arm.com
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Signed-off-by: Marc Zyngier <maz@kernel.org>
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dev_err_probe() can reduce code size, uniform error handling and record the
defer probe reason etc., use it to simplify the code.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1597126576-18383-2-git-send-email-Anson.Huang@nxp.com
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dev_err_probe() can reduce code size, uniform error handling and record the
defer probe reason etc., use it to simplify the code.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1597126576-18383-1-git-send-email-Anson.Huang@nxp.com
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Common pattern of handling deferred probe can be simplified with
dev_err_probe(). Less code and the error value gets printed.
There is also no need to assign NULL to 'intr->sci' as it is part of
devm-allocated memory.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200902174615.24695-1-krzk@kernel.org
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Signed-off-by: Marc Zyngier <maz@kernel.org>
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irq-renesas-irqc driver is also used on Renesas RZ/G{1,2} SoC's, update
the same to reflect the description for RENESAS_IRQC config.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Chris Paterson <Chris.Paterson2@renesas.com>
Link: https://lore.kernel.org/r/20200911100439.19878-1-prabhakar.mahadev-lad.rj@bp.renesas.com
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The K3 AM65x and J721E SoCs have the next generation of the PRU-ICSS IP,
commonly called ICSSG. The PRUSS INTC present within the ICSSG supports
more System Events (160 vs 64), more Interrupt Channels and Host Interrupts
(20 vs 10) compared to the previous generation PRUSS INTC instances. The
first 2 and the last 10 of these host interrupt lines are used by the
PRU and other auxiliary cores and sub-modules within the ICSSG, with 8
host interrupts connected to MPU. The host interrupts 5, 6, 7 are also
connected to the other ICSSG instances within the SoC and can be
partitioned as per system integration through the board dts files.
Enhance the PRUSS INTC driver to add support for this ICSSG INTC
instance.
Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
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This implements the irq_get_irqchip_state and irq_set_irqchip_state
callbacks for the TI PRUSS INTC driver. The set callback can be used
by drivers to "kick" a PRU by injecting a PRU system event.
Co-developed-by: Suman Anna <s-anna@ti.com>
Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Reviewed-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
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The PRUSS INTC has a fixed number of output interrupt lines that are
connected to a number of processors or other PRUSS instances or other
devices (like DMA) on the SoC. The output interrupt lines 2 through 9
are usually connected to the main Arm host processor and are referred
to as host interrupts 0 through 7 from ARM/MPU perspective.
All of these 8 host interrupts are not always exclusively connected
to the Arm interrupt controller. Some SoCs have some interrupt lines
not connected to the Arm interrupt controller at all, while a few others
have the interrupt lines connected to multiple processors in which they
need to be partitioned as per SoC integration needs. For example, AM437x
and 66AK2G SoCs have 2 PRUSS instances each and have the host interrupt 5
connected to the other PRUSS, while AM335x has host interrupt 0 shared
between MPU and TSC_ADC and host interrupts 6 & 7 shared between MPU and
a DMA controller.
Add logic to the PRUSS INTC driver to ignore both these shared and
invalid interrupts.
Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
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The Programmable Real-Time Unit Subsystem (PRUSS) contains a local
interrupt controller (INTC) that can handle various system input events
and post interrupts back to the device-level initiators. The INTC can
support upto 64 input events with individual control configuration and
hardware prioritization. These events are mapped onto 10 output interrupt
lines through two levels of many-to-one mapping support. Different
interrupt lines are routed to the individual PRU cores or to the host
CPU, or to other devices on the SoC. Some of these events are sourced
from peripherals or other sub-modules within that PRUSS, while a few
others are sourced from SoC-level peripherals/devices.
The PRUSS INTC platform driver manages this PRUSS interrupt controller
and implements an irqchip driver to provide a Linux standard way for
the PRU client users to enable/disable/ack/re-trigger a PRUSS system
event. The system events to interrupt channels and output interrupts
relies on the mapping configuration provided either through the PRU
firmware blob (for interrupts routed to PRU cores) or via the PRU
application's device tree node (for interrupt routed to the main CPU).
In the first case the mappings will be programmed on PRU remoteproc
driver demand (via irq_create_fwspec_mapping) during the boot of a PRU
core and cleaned up after the PRU core is stopped.
Reference counting is used to allow multiple system events to share a
single channel and to allow multiple channels to share a single host
event.
The PRUSS INTC module is reference counted during the interrupt
setup phase through the irqchip's irq_request_resources() and
irq_release_resources() ops. This restricts the module from being
removed as long as there are active interrupt users.
The driver currently supports and can be built for OMAP architecture
based AM335x, AM437x and AM57xx SoCs; Keystone2 architecture based
66AK2G SoCs and Davinci architecture based OMAP-L13x/AM18x/DA850 SoCs.
All of these SoCs support 64 system events, 10 interrupt channels and
10 output interrupt lines per PRUSS INTC with a few SoC integration
differences.
NOTE:
Each PRU-ICSS's INTC on AM57xx SoCs is preceded by a Crossbar that
enables multiple external events to be routed to a specific number
of input interrupt events. Any non-default external interrupt event
directed towards PRUSS needs this crossbar to be setup properly.
Co-developed-by: Suman Anna <s-anna@ti.com>
Co-developed-by: Andrew F. Davis <afd@ti.com>
Co-developed-by: Roger Quadros <rogerq@ti.com>
Co-developed-by: David Lechner <david@lechnology.com>
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
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