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authorYouquan Song <youquan.song@intel.com>2009-09-07 10:58:07 -0400
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-09-11 16:38:53 +0100
commite936d0773df172ec8600777fdd72bbc1f75f22ad (patch)
treec778f4d6aaee3e9ecbccbb4d0d31565a78e49a26 /drivers/pci/intr_remapping.c
parentadb2fe0277607d50f4e9ef06e1d180051a609c25 (diff)
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>
Diffstat (limited to 'drivers/pci/intr_remapping.c')
-rw-r--r--drivers/pci/intr_remapping.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c
index 4f5b8712931..ebfa47b79c5 100644
--- a/drivers/pci/intr_remapping.c
+++ b/drivers/pci/intr_remapping.c
@@ -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;