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139a1d2842
When Ultravisor (UV) is enabled, the partition table is stored in secure memory and can only be accessed via the UV. The Hypervisor (HV) however maintains a copy of the partition table in normal memory to allow Nest MMU translations to occur (for normal VMs). The HV copy includes partition table entries (PATE)s for secure VMs which would currently be unused (Nest MMU translations cannot access secure memory) but they would be needed as we add functionality. This patch adds the UV_WRITE_PATE ucall which is used to update the PATE for a VM (both normal and secure) when Ultravisor is enabled. Signed-off-by: Michael Anderson <andmike@linux.ibm.com> Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Signed-off-by: Ram Pai <linuxram@us.ibm.com> [ cclaudio: Write the PATE in HV's table before doing that in UV's ] Signed-off-by: Claudio Carvalho <cclaudio@linux.ibm.com> Reviewed-by: Ryan Grimm <grimm@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190822034838.27876-5-cclaudio@linux.ibm.com |
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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.