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Both KVM (through KVM_SET_XSTATE) and ptrace (through PTRACE_SETREGSET with NT_X86_XSTATE) ultimately call copy_uabi_from_kernel_to_xstate(), but the canonical locations for the current PKRU value for KVM guests and processes in a ptrace stop are different (in the kvm_vcpu_arch and the thread_state structs respectively). In preparation for eventually handling PKRU in copy_uabi_to_xstate, pass in a pointer to the PKRU location. Signed-off-by: Kyle Huey <me@kylehuey.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/all/20221115230932.7126-3-khuey%40kylehuey.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.