1355ea2e60
The unconditional full TLB flush (on say ASID rollover) iterates over each entry and uses TLBWrite to zero it out. TLBWrite by design also invalidates the uTLBs thus we end up invalidating it as many times as numbe rof entries (512 or 1k) Optimize this by using a weaker TLBWriteNI cmd in loop, which doesn't tinker with uTLBs and an explicit one time IVUTLB, outside the loop to invalidate them all once. And given the optimiztion, the IVUTLB is now needed on MMUv4 too where the uTLBs and JTLBs are otherwise coherent given the TLBInsertEntry / TLBDeleteEntry commands Signed-off-by: Vineet Gupta <vgupta@synopsys.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.