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52c07e1cbb
KVM guest has two levels of address translation: guest tlb translates GVA to GPA, and root tlb translates GPA to HPA. By default guest's CCA is controlled by guest tlb, but Loongson-3 maintains all cache coherency by hardware (including multi-core coherency and I/O DMA coherency) so it prefers all guest mappings be cacheable mappings. Thus, we use root tlb to control guest's CCA for Loongson-3. Reviewed-by: Aleksandar Markovic <aleksandar.qemu.devel@gmail.com> Signed-off-by: Huacai Chen <chenhc@lemote.com> Co-developed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Message-Id: <1590220602-3547-8-git-send-email-chenhc@lemote.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.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.