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Differential D2042

APIs to dynamically allocate and free IPI slots.
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Authored by neel on Mar 10 2015, 7:40 PM.
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kib
jhb
royger
Commits
rS279970: Add x86 specific APIs 'lapic_ipi_alloc()' and 'lapic_ipi_free()' to allow IPI
Summary

Add x86 specific APIs 'lapic_ipi_alloc()' and 'lapic_ipi_free()' to allow IPI
vectors to be dynamically allocated. This allows kernel modules like vmm.ko
to allocate unique IPI slots when loaded (as opposed to hard allocating one
or more vectors).

Also, reorganize the fixed IPI vectors to create a contiguous space for
dynamic IPI allocation.

Test Plan

Compile and run amd64 and i386 kernels. Xen kernels not tested.

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rS FreeBSD src repository - subversion
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Event Timeline

neel updated this revision to Diff 4172.Mar 10 2015, 7:40 PM
neel retitled this revision from to APIs to dynamically allocate and free IPI slots..
neel updated this object.
neel edited the test plan for this revision. (Show Details)
neel added reviewers: jhb, kib, royger.
neel added a subscriber: grehan.
Herald added a subscriber: imp. · View Herald TranscriptMar 10 2015, 7:40 PM
kib accepted this revision.Mar 11 2015, 2:41 PM
kib edited edge metadata.
This revision is now accepted and ready to land.Mar 11 2015, 2:41 PM
jhb accepted this revision.Mar 13 2015, 9:46 AM
jhb edited edge metadata.
neel closed this revision.Mar 14 2015, 12:31 AM
neel updated this revision to Diff 4218.

Closed by commit rS279970 (authored by @neel).

Revision Contents
Changeset List

PathSize
head/
sys/
x86/
include/
32 lines
x86/
60 lines
xen/
19 lines

Diff 4218

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head/sys/x86/include/apicvar.h

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head/sys/x86/x86/local_apic.c

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head/sys/x86/xen/xen_apic.c

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