efebf0aaec
If L1 uses VPID, it expects TLB to not be flushed on L1<->L2 transitions. However, code currently flushes TLB nonetheless if we didn't allocate a vpid02 for L2. As in this case, vmcs02->vpid == vmcs01->vpid == vmx->vpid. But, if L1 uses EPT, TLB entires populated by L2 are tagged with EPTP02 while TLB entries populated by L1 are tagged with EPTP01. Therefore, we can also avoid TLB flush if L1 uses VPID and EPT. Reviewed-by: Mihai Carabas <mihai.carabas@oracle.com> Reviewed-by: Darren Kenny <darren.kenny@oracle.com> Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com> Signed-off-by: Liran Alon <liran.alon@oracle.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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.