fc65d0acaf
Recent patch attempted to enable selective page flushes on AMD IOMMU but neglected to adapt amd_iommu_iotlb_sync() to use the selective flushes. Adapt amd_iommu_iotlb_sync() to use selective flushes and change amd_iommu_unmap() to collect the flushes. As a defensive measure, to avoid potential issues as those that the Intel IOMMU driver encountered recently, flush the page-walk caches by always setting the "pde" parameter. This can be removed later. Cc: Joerg Roedel <joro@8bytes.org> Cc: Will Deacon <will@kernel.org> Cc: Jiajun Cao <caojiajun@vmware.com> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Lu Baolu <baolu.lu@linux.intel.com> Cc: iommu@lists.linux-foundation.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Nadav Amit <namit@vmware.com> Link: https://lore.kernel.org/r/20210723093209.714328-2-namit@vmware.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
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.