mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-09-22 09:34:56 +02:00
Ethan Milon
3141153816
The function cache_tag_flush_all() was originally implemented with incorrect device TLB invalidation logic that does not handle PASID, in commitc4d27ffaa8("iommu/vt-d: Add cache tag invalidation helpers") This causes regressions where full address space TLB invalidations occur with a PASID attached, such as during transparent hugepage unmapping in SVA configurations or when calling iommu_flush_iotlb_all(). In these cases, the device receives a TLB invalidation that lacks PASID. This incorrect logic was later extracted into cache_tag_flush_devtlb_all(), in commit3297d047cd("iommu/vt-d: Refactor IOTLB and Dev-IOTLB flush for batching") The fix replaces the call to cache_tag_flush_devtlb_all() with cache_tag_flush_devtlb_psi(), which properly handles PASID. Fixes:4f609dbff5("iommu/vt-d: Use cache helpers in arch_invalidate_secondary_tlbs") Fixes:4e589a5368("iommu/vt-d: Use cache_tag_flush_all() in flush_iotlb_all") Signed-off-by: Ethan Milon <ethan.milon@eviden.com> Link: https://lore.kernel.org/r/20250708214821.30967-1-ethan.milon@eviden.com Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/20250714045028.958850-11-baolu.lu@linux.intel.com Signed-off-by: Will Deacon <will@kernel.org>
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 reStructuredText 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.