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Add some support for the PCI(e)-PCI bridges to the Intel VT-d driver.
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Provide a workaround by identity mapping the 32 pages after the bogus
entry start, which seems to be enough for the reported BIOS.
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Trim at EOL.
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Fix undefined behavior: (1 << 31) is not defined as 1 is an int and this
shifts into the sign bit. Instead use (1U << 31) which gets the
expected result.
Similar to the (1 << 31) case it is not defined to do (2 << 30).
This fix is not ideal as it assumes a 32 bit int, but does fix the issue
for most cases.
A similar change was made in OpenBSD.
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MFC r257251:
Import the driver for VT-d DMAR hardware. Implement the busdma(9) using DMARs.
MFC r257512:
Add support for queued invalidation.
MFC miscellaneous follow-ups to r257251.
MFC r257266:
Remove redundand assignment to error variable and check for its value.
MFC r257308:
Remove redundand declaration.
MFC r257511:
Return BUS_PROBE_NOWILDCARD from the DMAR probe method.
MFC r257860,r257896,r257900,r257902,r257903 (by dim):
Fixes for gcc compilation.
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