03ba15ca65
Currently, DPDK will skip mapping some areas (or even an entire BAR) if MSI-X table happens to be in them but is smaller than page size. Kernels 4.16+ will allow mapping MSI-X BARs [1], and will report this as a capability flag. Capability flags themselves are also only supported since kernel 4.6 [2]. This commit will introduce support for checking VFIO capabilities, and will use it to check if we are allowed to map BARs with MSI-X tables in them, along with backwards compatibility for older kernels, including a workaround for a variable rename in VFIO region info structure [3]. [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/ linux.git/commit/?id=a32295c612c57990d17fb0f41e7134394b2f35f6 [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/ linux.git/commit/?id=c84982adb23bcf3b99b79ca33527cd2625fbe279 [3] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/ linux.git/commit/?id=ff63eb638d63b95e489f976428f1df01391e15e4 Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
DPDK is a set of libraries and drivers for fast packet processing. It supports many processor architectures and both FreeBSD and Linux. The DPDK uses the Open Source BSD-3-Clause license for the core libraries and drivers. The kernel components are GPL-2.0 licensed. Please check the doc directory for release notes, API documentation, and sample application information. For questions and usage discussions, subscribe to: users@dpdk.org Report bugs and issues to the development mailing list: dev@dpdk.org