| 2e62782d | 03-Aug-2018 |
Konstantin Belousov <[email protected]> |
Require write access when mmapping BAR.
This actually makes the rights requirements for accessing PCI config
space and BARs using /dev/pci same. Since unchanged /dev/pci mode
only allows write open
Require write access when mmapping BAR.
This actually makes the rights requirements for accessing PCI config
space and BARs using /dev/pci same. Since unchanged /dev/pci mode
only allows write open for root, default configuration de-facto limits
the BAR read to root only. In particular, state-changing reads of the
registers are limited to root.
Discussed with: se
Suggested and reviewed by: jhb (kernel part)
Sponsored by: The FreeBSD Foundation
MFC after: 12 days
Differential revision: https://reviews.freebsd.org/D16580
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