Increase DMAR_UNITS_SUPPORTED to support 64 sockets with 10 DMAR units each, for a total of 640.
If the available hardware exceeds DMAR_UNITS_SUPPORTED (previously set to MAX_IO_APICS, or 128), it causes these messages: "DMAR: Failed to allocate seq_id", "DMAR: Parse DMAR table failure.", and "x2apic: IRQ remapping doesn't support X2APIC mode x2apic disabled"; and the system fails to boot. Signed-off-by: Steve Wahl <[email protected]> Reviewed-by: Mike Travis <[email protected]> --- Note that we could not find a reason for connecting DMAR_UNITS_SUPPORTED to MAX_IO_APICS as was done previously. Perhaps it seemed like the two would continue to match on earlier processors. There doesn't appear to be kernel code that assumes that the value of one is related to the other. include/linux/dmar.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/dmar.h b/include/linux/dmar.h index 45e903d84733..9d4867b8f42e 100644 --- a/include/linux/dmar.h +++ b/include/linux/dmar.h @@ -19,7 +19,7 @@ struct acpi_dmar_header; #ifdef CONFIG_X86 -# define DMAR_UNITS_SUPPORTED MAX_IO_APICS +# define DMAR_UNITS_SUPPORTED 640 #else # define DMAR_UNITS_SUPPORTED 64 #endif -- 2.26.2 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
