6802d9dfbc
- In iflib_msix_init(), VMMs with broken MSI-X activation are trying to be worked around by manually enabling PCIM_MSIXCTRL_MSIX_ENABLE before calling pci_alloc_msix(9). Apart from constituting a layering violation, this has the problem of leaving PCIM_MSIXCTRL_MSIX_ENABLE enabled when falling back to MSI or INTx when e. g. MSI-X is black- listed and initially also when disabled via hw.pci.enable_msix. The later in turn was incorrectly worked around in r325166. Since r310806, pci(4) itself has code to deal with broken MSI-X handling of VMMs, so all of these workarounds in iflib(9) can go, fixing non-working interrupts when falling back to MSI/INTx. In any case, possibly further adjustments to broken MSI-X activation of VMMs like enabling r310806 by default in VM environments need to be placed into pci(4), not iflib(9). [1] - Also remove the pci_enable_busmaster(9) call from iflib_msix_init(), which is already more properly invoked from iflib_device_attach(). - When falling back to MSI/INTx, release the MSI-X BAR resource again. - When falling back to INTx, ensure scctx->isc_vectors is set to 1 and not to something higher from a device with more than one MSI message supported. - Make the nearby ring_state(s) stuff (static) const. Discussed with: jhb at BSDCan 2018 [1] Reviewed by: imp, jhb Differential Revision: https://reviews.freebsd.org/D15729
FreeBSD Source:
This is the top level of the FreeBSD source directory. This file
was last revised on:
FreeBSD
FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.
For copyright information, please see the file COPYRIGHT in this directory. Additional copyright information also exists for some sources in this tree - please see the specific source directories for more information.
The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7), config(8), https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html, and https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information, including setting make(1) variables.
Source Roadmap:
bin System/user commands.
cddl Various commands and libraries under the Common Development
and Distribution License.
contrib Packages contributed by 3rd parties.
crypto Cryptography stuff (see crypto/README).
etc Template files for /etc.
gnu Various commands and libraries under the GNU Public License.
Please see gnu/COPYING* for more information.
include System include files.
kerberos5 Kerberos5 (Heimdal) package.
lib System libraries.
libexec System daemons.
release Release building Makefile & associated tools.
rescue Build system for statically linked /rescue utilities.
sbin System commands.
secure Cryptographic libraries and commands.
share Shared resources.
stand Boot loader sources.
sys Kernel sources.
sys/<arch>/conf Kernel configuration files. GENERIC is the configuration
used in release builds. NOTES contains documentation of
all possible entries.
tests Regression tests which can be run by Kyua. See tests/README
for additional information.
tools Utilities for regression testing and miscellaneous tasks.
usr.bin User commands.
usr.sbin System administration commands.
For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see:
https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/current-stable.html