d93e5e2d03
Currently we don't report anything useful in /proc/<pid>/status: $ grep Speculation_Store_Bypass /proc/self/status Speculation_Store_Bypass: unknown Our mitigation is currently always a barrier instruction, which doesn't map that well onto the existing possibilities for the PR_SPEC values. However even if we added a "barrier" type PR_SPEC value, userspace would still need to consult some other source to work out which type of barrier to use. So reporting "vulnerable" seems sufficient, as userspace can see that and then consult its source to determine what barrier to use. Signed-off-by: Gustavo Walbon <gwalbon@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200402124929.3574166-1-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.