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Aditya Gupta
7135b921b3
Presently, while reading a vmcore, makedumpfile uses `cur_cpu_spec.mmu_features` to decide whether the crashed system had RADIX MMU or not. Currently, makedumpfile fails to get the `cur_cpu_spec` symbol (unless a vmlinux is passed with the `-x` flag to makedumpfile), and hence assigns offsets and shifts (such as pgd_offset_l4) incorrecly considering MMU to be hash MMU. Add `cur_cpu_spec` symbol and offset of `mmu_features` in the `cpu_spec` struct, to VMCOREINFO, so that the symbol address and offset is accessible to makedumpfile, without needing the vmlinux file Signed-off-by: Aditya Gupta <adityag@linux.ibm.com> Reported-by: Sachin Sant <sachinp@linux.ibm.com> Tested-by: Sachin Sant <sachinp@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230911091409.415662-1-adityag@linux.ibm.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.