Commit e936d077 authored Sep 07, 2009 by Youquan Song Committed by David Woodhouse Sep 11, 2009

intel-iommu: Disallow interrupt remapping if not all ioapics covered



Current kernel enable interrupt remapping only when all the vt-d unit support
interrupt remapping. So it is reasonable we should also disallow enabling
intr-remapping if there any io-apics that are not listed under vt-d units.
Otherwise we can run into issues.

Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Youquan Song <youquan.song@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

parent adb2fe02

drivers/pci/dmar.c

+0 −3

Original line number	Diff line number	Diff line
		@@ -570,9 +570,6 @@ int __init dmar_table_init(void)
		printk(KERN_INFO PREFIX "No ATSR found\n");
		#endif

		#ifdef CONFIG_INTR_REMAP
		parse_ioapics_under_ir();
		#endif
		return 0;
		}

drivers/pci/intr_remapping.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -626,6 +626,11 @@ int __init enable_intr_remapping(int eim)
		struct dmar_drhd_unit *drhd;
		int setup = 0;

		if (parse_ioapics_under_ir() != 1) {
		printk(KERN_INFO "Not enable interrupt remapping\n");
		return -1;
		}

		for_each_drhd_unit(drhd) {
		struct intel_iommu *iommu = drhd->iommu;