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Differential D57321

amd64: do not switch back and restore UEFI IDT in wrmsr_early_safe_end()
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Authored by kib on May 29 2026, 7:36 AM.
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rG606d3cb1be5f: amd64: do not switch back and restore UEFI IDT in wrmsr_early_safe_end()
Summary
The memory where the pre-OS IDT was located might be already consumed by
kernel.

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rG FreeBSD src repository
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Event Timeline

kib created this revision.May 29 2026, 7:36 AM
Herald added a subscriber: imp. · View Herald TranscriptMay 29 2026, 7:36 AM
kib requested review of this revision.May 29 2026, 7:36 AM
This revision was not accepted when it landed; it landed in state Needs Review.Jun 1 2026, 4:37 PM
Closed by commit rG606d3cb1be5f: amd64: do not switch back and restore UEFI IDT in wrmsr_early_safe_end() (authored by kib). · Explain Why
This revision was automatically updated to reflect the committed changes.
kib added a commit: rG606d3cb1be5f: amd64: do not switch back and restore UEFI IDT in wrmsr_early_safe_end().

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sys/
amd64/
amd64/
8 lines

Diff 179065

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sys/amd64/amd64/machdep.c

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