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[ Upstream commita8f7e08a81] The IN and OUT instructions with port address as an immediate operand only use an 8-bit immediate (imm8). The current VC handler uses the entire 32-bit immediate value but these instructions only set the first bytes. Cast the operand to an u8 for that. [ bp: Massage commit message. ] Fixes:25189d08e5("x86/sev-es: Add support for handling IOIO exceptions") Signed-off-by: Peter Gonda <pgonda@google.com> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: David Rientjes <rientjes@google.com> Link: https://lkml.kernel.org/r/20210105163311.221490-1-pgonda@google.com Signed-off-by: Sasha Levin <sashal@kernel.org>
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.