29c9a2699e
The RTAS set-indicator call, when attempting to UNISOLATE a DRC that is already UNISOLATED or CONFIGURED, returns RTAS_OK and does nothing else for both QEMU and phyp. This gives us an opportunity to use this behavior to signal the hypervisor layer when an error during device removal happens, allowing it to do a proper error handling, while not breaking QEMU/phyp implementations that don't have this support. This patch introduces this idea by unisolating all CPU DRCs that failed to be removed by dlpar_cpu_remove_by_index(), when handling the PSERIES_HP_ELOG_ID_DRC_INDEX event. This is being done for this event only because its the only CPU removal event QEMU uses, and there's no need at this moment to add this mechanism for phyp only code. Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210416210216.380291-3-danielhb413@gmail.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.