2284ffea8f
Apart from SRESET, MCE, and syscall (hcall variant), the SRR type interrupts are not escalated to hypervisor mode, so are delivered to the OS. When running PR KVM, the OS is the hypervisor, and the guest runs with MSR[PR]=1 (ie. usermode), so these interrupts must test if a guest was running when interrupted. These tests are required at the real-mode entry points because the PR KVM host runs with LPCR[AIL]=0. In HV KVM and nested HV KVM, the guest always receives these interrupts, so there is no need for the host to make this test. So remove the tests if PR KVM is not configured. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200225173541.1549955-21-npiggin@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.