[Bug 268486] panic: vtd_add_device: device 0 is not in scope for any DMA remapping unit
Date: Tue, 31 Jan 2023 21:58:54 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268486 --- Comment #7 from commit-hook@FreeBSD.org --- A commit in branch main references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=53545967642d850eee4f2dd9fa27cae52ae981b9 commit 53545967642d850eee4f2dd9fa27cae52ae981b9 Author: Eric Joyner <erj@FreeBSD.org> AuthorDate: 2023-01-30 21:34:03 +0000 Commit: Eric Joyner <erj@FreeBSD.org> CommitDate: 2023-01-31 21:57:42 +0000 vtd: Increase DRHD_MAX_UNITS Observed on a couple Ice Lake-SP platforms (Intel Coyote Pass, Dell R750), there are more than 8 DRHD sections enumerated in the DMAR ACPI section. Since the previous limit was 8, this resulted in some of these not being parsed by vtd when the iommu is initialized; in this case when PCI devices are being passthru'd to a bhyve VM. This omission later causes a kernel panic later in initialization when devices could not be found in a valid DRHD scope because the DHRD containing the device's scope was not added to vtd. Signed-off-by: Eric Joyner <erj@FreeBSD.org> PR: 268486 Sponsored by: Intel Corporation Reviewed by: rew@, corvink@ MFC after: 1 day Differential Revision: https://reviews.freebsd.org/D38285 sys/amd64/vmm/intel/vtd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- You are receiving this mail because: You are the assignee for the bug.