[Bug 270472] MS devkit hangs during boot if PAC is enabled
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Date: Sun, 23 Apr 2023 17:57:10 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270472
--- Comment #2 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:
URL:
https://cgit.FreeBSD.org/src/commit/?id=4b39a12830feaf2ac49b157ed079c04114b1a3ca
commit 4b39a12830feaf2ac49b157ed079c04114b1a3ca
Author: Mark Johnston <markj@FreeBSD.org>
AuthorDate: 2023-04-23 17:32:45 +0000
Commit: Mark Johnston <markj@FreeBSD.org>
CommitDate: 2023-04-23 17:55:57 +0000
arm64: Disable PAC when booting on a Windows Dev Kit 2023
It appears that PAC registers are configured to trap upon access, but
since the kernel starts in EL1 on this platform it has no ability to
inspect or modify this configuration. Simply disable PAC on this
platform for now, since the kernel otherwise hangs during boot.
PR: 270472
Reviewed by: andrew, emaste
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D39748
sys/arm64/arm64/ptrauth.c | 31 ++++++++++++++++++++++++++++++-
1 file changed, 30 insertions(+), 1 deletion(-)
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