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This patch creates a debugfs file to see content of segment registers # cat /sys/kernel/debug/segment_registers ---[ User Segments ]--- 0x00000000-0x0fffffff Kern key 1 User key 1 VSID 0xade2b0 0x10000000-0x1fffffff Kern key 1 User key 1 VSID 0xade3c1 0x20000000-0x2fffffff Kern key 1 User key 1 VSID 0xade4d2 0x30000000-0x3fffffff Kern key 1 User key 1 VSID 0xade5e3 0x40000000-0x4fffffff Kern key 1 User key 1 VSID 0xade6f4 0x50000000-0x5fffffff Kern key 1 User key 1 VSID 0xade805 0x60000000-0x6fffffff Kern key 1 User key 1 VSID 0xade916 0x70000000-0x7fffffff Kern key 1 User key 1 VSID 0xadea27 0x80000000-0x8fffffff Kern key 1 User key 1 VSID 0xadeb38 0x90000000-0x9fffffff Kern key 1 User key 1 VSID 0xadec49 0xa0000000-0xafffffff Kern key 1 User key 1 VSID 0xaded5a 0xb0000000-0xbfffffff Kern key 1 User key 1 VSID 0xadee6b ---[ Kernel Segments ]--- 0xc0000000-0xcfffffff Kern key 0 User key 1 VSID 0x000ccc 0xd0000000-0xdfffffff Kern key 0 User key 1 VSID 0x000ddd 0xe0000000-0xefffffff Kern key 0 User key 1 VSID 0x000eee 0xf0000000-0xffffffff Kern key 0 User key 1 VSID 0x000fff Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> [mpe: Move it under /sys/kernel/debug/powerpc, make sr_init() __init] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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.