https://github.com/torvalds/linux
Revision 910170442944e1f8674fd5ddbeeb8ccd1877ea98 authored by David Woodhouse on 12 September 2016, 02:49:11 UTC, committed by David Woodhouse on 19 November 2016, 17:42:35 UTC
Somehow I ended up with an off-by-three error in calculating the size of the PASID and PASID State tables, which triggers allocations failures as those tables unfortunately have to be physically contiguous. In fact, even the *correct* maximum size of 8MiB is problematic and is wont to lead to allocation failures. Since I have extracted a promise that this *will* be fixed in hardware, I'm happy to limit it on the current hardware to a maximum of 0x20000 PASIDs, which gives us 1MiB tables — still not ideal, but better than before. Reported by Mika Kuoppala <mika.kuoppala@linux.intel.com> and also by Xunlei Pang <xlpang@redhat.com> who submitted a simpler patch to fix only the allocation (and not the free) to the "correct" limit... which was still problematic. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Cc: stable@vger.kernel.org
1 parent 1c38718
Tip revision: 910170442944e1f8674fd5ddbeeb8ccd1877ea98 authored by David Woodhouse on 12 September 2016, 02:49:11 UTC
iommu/vt-d: Fix PASID table allocation
iommu/vt-d: Fix PASID table allocation
Tip revision: 9101704
.gitignore
#
# NOTE! Don't add files that are generated in specific
# subdirectories here. Add them in the ".gitignore" file
# in that subdirectory instead.
#
# NOTE! Please use 'git ls-files -i --exclude-standard'
# command after changing this file, to see if there are
# any tracked files which get ignored after the change.
#
# Normal rules
#
.*
*.o
*.o.*
*.a
*.s
*.ko
*.so
*.so.dbg
*.mod.c
*.i
*.lst
*.symtypes
*.order
*.elf
*.bin
*.tar
*.gz
*.bz2
*.lzma
*.xz
*.lz4
*.lzo
*.patch
*.gcno
modules.builtin
Module.symvers
*.dwo
*.su
*.c.[012]*.*
#
# Top-level generic files
#
/tags
/TAGS
/linux
/vmlinux
/vmlinux.32
/vmlinux-gdb.py
/vmlinuz
/System.map
/Module.markers
#
# Debian directory (make deb-pkg)
#
/debian/
#
# tar directory (make tar*-pkg)
#
/tar-install/
#
# git files that we don't want to ignore even if they are dot-files
#
!.gitignore
!.mailmap
!.cocciconfig
#
# Generated include files
#
include/config
include/generated
arch/*/include/generated
# stgit generated dirs
patches-*
# quilt's files
patches
series
# cscope files
cscope.*
ncscope.*
# gnu global files
GPATH
GRTAGS
GSYMS
GTAGS
# id-utils files
ID
*.orig
*~
\#*#
#
# Leavings from module signing
#
extra_certificates
signing_key.pem
signing_key.priv
signing_key.x509
x509.genkey
# Kconfig presets
all.config
# Kdevelop4
*.kdev4
Computing file changes ...
