Linux kernel source tree
a360f3ffd0
- Ensure ordering of memory and device I/O for IPIs on RISCV
The RISCV interrupt controllers use writel_relaxed() for generating an
IPI. That's a device I/O write which is not guaranteed to be ordered
against preceding memory writes. As a consequence a IPI receiving CPU
might not be able to observe the actual IPI data which is required to
handle it. Switch to writel() which contains the necessary memory
barriers to enforce ordering.
- Fix up the fallout of the MSI conversion in the MVEVBU ICU driver.
The conversion failed to handle the change of the data storage and kept
the original code which uses the domain::host_data pointer
unchanged. After the conversion domain::host_data points to the new
msi_domain_info structure and not longer to the MVEBU specific MSI data,
which is now stored in a member of msi_domain_info. This leads to
malfunction of the transalate() callback.
- Only handle the PMC in FIQ mode when it is configured that way.
The original check was incorrect as it did not explicitely check for the
proper conditions, which led to malfunctions of the PMU interrupt.
- Improve Kconfig dependencies for the LAN966x Outband Interrupt
controller to avoid pointless pronmpts.
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Merge tag 'irq-urgent-2025-02-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
- Ensure ordering of memory and device I/O for IPIs on RISCV
The RISCV interrupt controllers use writel_relaxed() for generating
an IPI. That's a device I/O write which is not guaranteed to be
ordered against preceding memory writes. As a consequence a IPI
receiving CPU might not be able to observe the actual IPI data which
is required to handle it. Switch to writel() which contains the
necessary memory barriers to enforce ordering.
- Fix up the fallout of the MSI conversion in the MVEVBU ICU driver.
The conversion failed to handle the change of the data storage and
kept the original code which uses the domain::host_data pointer
unchanged. After the conversion domain::host_data points to the new
msi_domain_info structure and not longer to the MVEBU specific MSI
data, which is now stored in a member of msi_domain_info. This leads
to malfunction of the transalate() callback.
- Only handle the PMC in FIQ mode when it is configured that way.
The original check was incorrect as it did not explicitely check for
the proper conditions, which led to malfunctions of the PMU
interrupt.
- Improve Kconfig dependencies for the LAN966x Outband Interrupt
controller to avoid pointless pronmpts.
* tag 'irq-urgent-2025-02-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/apple-aic: Only handle PMC interrupt as FIQ when configured so
irqchip/irq-mvebu-icu: Fix access to msi_data from irq_domain::host_data
irqchip/riscv: Ensure ordering of memory writes and IPI writes
irqchip/lan966x-oic: Make CONFIG_LAN966X_OIC depend on CONFIG_MCHP_LAN966X_PCI
dt-bindings: interrupt-controller: microchip,lan966x-oic: Clarify endpoint use
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.