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afd05e28c9
An unexpected synchronous exception from EL1h could happen at any time, and for robustness we should treat this as an NMI, making minimal assumptions about the context the exception was taken from. Currently el1_inv() assumes we can use enter_from_kernel_mode(), and also assumes that we should inherit the original DAIF value. Neither of these are desireable when we take an unexpected exception. Further, after el1_inv() calls __panic_unhandled(), the remainder of the function is unreachable, and therefore superfluous. Let's address this and simplify things by having el1h_64_sync_handler() call __panic_unhandled() directly, without any of the redundant logic. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Marc Zyngier <maz@kernel.org> Reported-by: Joey Gouly <joey.gouly@arm.com> Cc: James Morse <james.morse@arm.com> Cc: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20210607094624.34689-16-mark.rutland@arm.com Signed-off-by: Will Deacon <will@kernel.org>
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 Restructured Text 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.