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f156a7d13f
commitf922c13e77("KVM: arm64: Introduce pkvm_alloc_private_va_range()") and commit92abe0f81e("KVM: arm64: Introduce hyp_alloc_private_va_range()") added an alignment for the start address of any allocation into the nVHE hypervisor private VA range. This alignment (order of the size of the allocation) intends to enable efficient stack verification (if the PAGE_SHIFT bit is zero, the stack pointer is on the guard page and a stack overflow occurred). But this is only necessary for stack allocation and can waste a lot of VA space. So instead make stack-specific functions, handling the guard page requirements, while other users (e.g. fixmap) will only get page alignment. Reviewed-by: Kalesh Singh <kaleshsingh@google.com> Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230811112037.1147863-1-vdonnefort@google.com
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.