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John Baldwin be0319fd19 Add a tunable to disable migration of MSI-X interrupts.
The new 'machdep.disable_msix_migration' tunable can be set to 1 to
disable migration of MSI-X interrupts.

Xen versions prior to 4.6.0 do not properly handle updates to MSI-X
table entries after the initial write.  In particular, the operation
to unmask a table entry after updating it during migration is not
propagated to the "real" table for passthrough devices causing the
interrupt to remain masked.  At least some systems in EC2 are
affected by this bug when using SRIOV.  The tunable can be set in
loader.conf as a workaround.

Submitted by:	Jeremiah Lott <jlott@averesystems.com> (original patch)
Approved by:	re (marius)
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D6947
2016-06-24 22:49:32 +00:00
bin WITH_META_MODE: Fix bin/csh rebuilding tc.const.h 2016-06-14 16:19:49 +00:00
cddl Raise the WARNS level in cddl/lib 2016-06-23 15:02:57 +00:00
contrib MFV r302003,r302037,r302038,r302056: 2016-06-22 07:49:59 +00:00
crypto Add blacklist support to sshd 2016-06-07 16:18:09 +00:00
etc Add support for a /etc/defaults/vendor.conf override file 2016-06-23 19:37:00 +00:00
gnu WITH_META_MODE: Don't expect a .meta file for side-effect generated files. 2016-06-15 23:57:53 +00:00
include Commit the bits of nda that were missed. This should fix the build. 2016-06-10 06:04:53 +00:00
kerberos5 DIRDEPS_BUILD: Update dependencies 2016-06-14 16:55:05 +00:00
lib Resolve issue with libusb C++ header file inclusion. 2016-06-24 10:55:14 +00:00
libexec DIRDEPS_BUILD: Update dependencies 2016-06-14 16:55:05 +00:00
release Note ipfilter support in blacklist-helper script in relnotes 2016-06-17 16:34:25 +00:00
rescue DIRDEPS_BUILD: Fix and hookup rescue/rescue to the build. 2016-05-26 23:20:40 +00:00
sbin Fix "sysctl vm.vmtotal" output on machines with > 2TB virtual memory 2016-06-24 14:58:37 +00:00
secure DIRDEPS_BUILD: Update dependencies 2016-06-14 16:55:05 +00:00
share Regenerate 2016-06-24 20:00:39 +00:00
sys Add a tunable to disable migration of MSI-X interrupts. 2016-06-24 22:49:32 +00:00
targets Add clang-format under WITH_CLANG_EXTRAS. 2016-06-17 16:46:58 +00:00
tests Fix bitstring allocation on 32-bit platforms 2016-06-24 21:44:46 +00:00
tools makeroot: zero out subsecond component of time= keywords 2016-06-23 19:19:44 +00:00
usr.bin gcore: Forward pending signals when detaching from the target. 2016-06-24 20:21:32 +00:00
usr.sbin Fix gstat's interactive f and q commands 2016-06-23 23:13:14 +00:00
.arcconfig Remove project.name which is a product of a bygone era. 2016-04-21 04:33:07 +00:00
.arclint phabricator related changes: 2015-04-20 20:33:22 +00:00
COPYRIGHT Bump copyright year. 2015-12-31 11:21:45 +00:00
LOCKS Explicitly require Security Officer's approval for kernel PRNG bits. 2013-09-17 14:19:05 +00:00
MAINTAINERS Add myself to MAINTAINERS. 2016-03-14 16:27:43 +00:00
Makefile WITH_META_MODE: Whitelist 'make kernel-toolchain' 2016-06-22 19:07:41 +00:00
Makefile.inc1 Fix native powerpc64 build of lib32 with in-tree GCC. 2016-06-15 23:58:03 +00:00
Makefile.libcompat Fix native powerpc64 build of lib32 with in-tree GCC. 2016-06-15 23:58:03 +00:00
ObsoleteFiles.inc Replace _pam_verbose_error() with a macro. This was the last difference 2016-06-08 11:47:19 +00:00
README README: remove nonexistent 'games' directory. 2016-05-18 10:43:13 +00:00
UPDATING Fix two typos in r302152. 2016-06-23 21:09:07 +00:00

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