[Bug 280817] With DMAR enabled, my laptop panics

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 20 Aug 2024 15:50:50 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280817

--- Comment #19 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=0875f3cd74b2f305e82bff4e640c89f891ca84f8

commit 0875f3cd74b2f305e82bff4e640c89f891ca84f8
Author:     Ed Maste <emaste@FreeBSD.org>
AuthorDate: 2024-08-20 15:43:11 +0000
Commit:     Ed Maste <emaste@FreeBSD.org>
CommitDate: 2024-08-20 15:49:25 +0000

    Revert "x86: Enable Intel DMAR by default"

    A number of people have reported panics with it enabled by default,
    possibly due to broken ACPI tables, which we do not handle well. D46382
    is a potential fix for this issue.

    Additionally DMAR is currently not compatible with bhyve passthrough
    (see comment #10 in PR280817), with a draft patch to address that in
    D25672.

    Revert to disabling DMAR by default pending the resolution of those two
    issues.

    This reverts commit 3192fc30230ae432b80cca783abc2dbea9d3f383.

    PR:             280817
    Sponsored by:   The FreeBSD Foundation

 sys/x86/iommu/intel_drv.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

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