On Wed, Aug 8, 2012 at 6:27 AM, Seth Forshee <[email protected]> wrote: > The ACPI tables in the Macbook Air 5,1 define a single IOAPIC with id 2, > but the only remapping unit described in the DMAR table matches id 0. > Interrupt remapping fails as a result, and the kernel panics with the > message "timer doesn't work through Interrupt-remapped IO-APIC." > > To fix this, check each IOAPIC for a corresponding IOMMU. If an IOMMU is > not found, do not allow IRQ remapping to be enabled. > > v2: Move check to parse_ioapics_under_ir(), raise log level to KERN_ERR, > and add FW_BUG to the log message > v3: Skip check if IOMMU doesn't support interrupt remapping and remove > existing check that the IOMMU count equals the IOAPIC count >
Acked-by: Yinghai Lu <[email protected]> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
