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Differential D15610

powerpc64: Avoid overwriting initrd area
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Authored by breno.leitao_gmail.com on May 29 2018, 9:17 PM.

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Reviewers
jhibbits
nwhitehorn
Commits
rS334485: powerpc64: Avoid overwriting initrd area
Summary

Currently kexec loads an initrd file into the main memory but does not
mark that region as reserved, thus the area is not protected.

If any initrd/md file is loaded from kexec/petitboot, the region might become
corarupted/overwritten since FreeBSD does not know the region is 'reserved'.

This patch simply adds the initrd area as a reserved memory region.

Test Plan
  • Tested on both pseries and POWER9

Diff Detail

Repository
rS FreeBSD src repository
Lint
Automatic diff as part of commit; lint not applicable.
Unit
Automatic diff as part of commit; unit tests not applicable.

Event Timeline

jhibbits accepted this revision.May 31 2018, 4:46 AM

Looks good

This revision is now accepted and ready to land.May 31 2018, 4:46 AM
Closed by commit rS334485: powerpc64: Avoid overwriting initrd area (authored by leitao). · Explain WhyJun 1 2018, 12:43 PM
This revision was automatically updated to reflect the committed changes.

Revision Contents
Changeset List

PathPackages
Mhead/sys/powerpc/ofw/ofw_machdep.c (113 lines)

Diff 43230

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head/sys/powerpc/ofw/ofw_machdep.c

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