Differential D18854

x86 busdma: fix mis-use of bus_addr_t where vm_paddr_t is assumed.
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Authored by kib on Jan 16 2019, 6:32 AM.

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jhb
markj

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rS343147: i386/PAE busdma: allow more bounce pages.
rS343146: x86 busdma: fix mis-use of bus_addr_t where vm_paddr_t is assumed.

Summary

Right now bus_addr_t and vm_paddr_t are always aliases for the same underlying integer type on x86, which makes the interchange hard to detect. Shortly, i386 kernel would use uint64_t for vm_paddr_t to enable automatic use of PAE paging structures if hardware allows it, while bus_addr_t would be extended to 64bit only when PAE option is specified.

Fix all places that were identified as using bus_addr_t while page address was assumed. This was performed by testing the complete PAE merging patch on machine with > 4G of RAM enabled.

Tested by: pho (as part of the larger patch)

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rS FreeBSD src repository - subversion

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Event Timeline

kib created this revision.Jan 16 2019, 6:32 AM

Herald added a subscriber: imp. · View Herald TranscriptJan 16 2019, 6:32 AM

Harbormaster completed remote builds in B21979: Diff 52884.Jan 16 2019, 6:32 AM

markj accepted this revision.Jan 16 2019, 5:38 PM

This revision is now accepted and ready to land.Jan 16 2019, 5:38 PM

Closed by commit rS343146: x86 busdma: fix mis-use of bus_addr_t where vm_paddr_t is assumed. (authored by kib). · Explain WhyJan 18 2019, 1:39 PM

This revision was automatically updated to reflect the committed changes.

kib reopened this revision.Jan 18 2019, 1:41 PM

This revision was not accepted when it landed; it landed in state Needs Review.Jan 18 2019, 1:43 PM

Closed by commit rS343147: i386/PAE busdma: allow more bounce pages. (authored by kib). · Explain Why

This revision was automatically updated to reflect the committed changes.

Revision Contents
Changeset List

Path

Size

head/

sys/

x86/

x86/

busdma_bounce.c

2 lines

Diff 52979

head/sys/x86/x86/busdma_bounce.c

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