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Differential D31415

x86: cpufunc: Add rdtscp_aux()
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Authored by adam_fenn.io on Aug 5 2021, 2:16 AM.
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imp
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Reviewers
kib
markj
stevek
royger
Commits
rGe088ad2d0efe: x86: cpufunc: Add rdtscp_aux()
rG908e277230ef: x86: cpufunc: Add rdtscp_aux()
Summary

Add a variant of rdtscp() that retains and returns the IA32_TSC_AUX
value read by rdtscp.

Test Plan

Tested as part of testing D29733.

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rG FreeBSD src repository
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Event Timeline

adam_fenn.io created this revision.Aug 5 2021, 2:16 AM
adam_fenn.io held this revision as a draft.
Herald added a subscriber: imp. · View Herald TranscriptAug 5 2021, 2:16 AM
Harbormaster completed remote builds in B40859: Diff 93244.Aug 5 2021, 2:16 AM
adam_fenn.io published this revision for review.Aug 5 2021, 2:43 AM
adam_fenn.io added a child revision: D29733: kvmclock driver with vDSO support.
kib accepted this revision.Aug 5 2021, 1:39 PM
This revision is now accepted and ready to land.Aug 5 2021, 1:39 PM
markj accepted this revision.Aug 5 2021, 1:39 PM
markj added inline comments.
sys/i386/include/cpufunc.h
412

Why not use the =A constraint here like the other intrinsics do?

adam_fenn.io updated this revision to Diff 93289.Aug 5 2021, 10:41 PM

Address @markj's feedback.

This revision now requires review to proceed.Aug 5 2021, 10:41 PM
Harbormaster completed remote builds in B40876: Diff 93289.Aug 5 2021, 10:41 PM
adam_fenn.io marked an inline comment as done.Aug 5 2021, 10:42 PM
kib accepted this revision.Aug 5 2021, 11:09 PM
This revision is now accepted and ready to land.Aug 5 2021, 11:09 PM
markj accepted this revision.Aug 6 2021, 1:58 PM
Closed by commit rG908e277230ef: x86: cpufunc: Add rdtscp_aux() (authored by adam_fenn.io, committed by kib). · Explain WhyAug 14 2021, 12:58 PM
This revision was automatically updated to reflect the committed changes.
kib added a commit: rG908e277230ef: x86: cpufunc: Add rdtscp_aux().
kib added a commit: rGe088ad2d0efe: x86: cpufunc: Add rdtscp_aux().Oct 12 2021, 4:03 PM

Revision Contents
Changeset List

PathSize
sys/
amd64/
include/
9 lines
i386/
include/
9 lines

Diff 93674

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sys/amd64/include/cpufunc.h

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sys/i386/include/cpufunc.h

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