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Code Issues Releases Activity

Revert "x86: Enable Intel DMAR by default"

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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 3192fc3023.

PR:		280817
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Ed Maste 2024-08-20 11:43:11 -04:00
parent aa6c490bf8
commit 0875f3cd74
1 changed files with 1 additions and 2 deletions
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3
sys/x86/iommu/intel_drv.c
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@ -159,8 +159,7 @@ dmar_count_iter(ACPI_DMAR_HEADER *dmarh, void *arg)
int dmar_rmrr_enable = 1; int dmar_rmrr_enable = 1;
static int dmar_enable = 1; static int dmar_enable = 0;
static void static void
dmar_identify(driver_t *driver, device_t parent) dmar_identify(driver_t *driver, device_t parent)
{ {