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

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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>
This commit is contained in:
Youquan Song 2009-09-07 10:58:07 -04:00 committed by David Woodhouse
parent adb2fe0277
commit e936d0773d
2 changed files with 5 additions and 3 deletions
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3
drivers/pci/dmar.c
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@ -570,9 +570,6 @@ int __init dmar_table_init(void)
printk(KERN_INFO PREFIX "No ATSR found\n"); printk(KERN_INFO PREFIX "No ATSR found\n");
#endif #endif
#ifdef CONFIG_INTR_REMAP
parse_ioapics_under_ir();
#endif
return 0; return 0;
} }

5
drivers/pci/intr_remapping.c
View file

@ -626,6 +626,11 @@ int __init enable_intr_remapping(int eim)
struct dmar_drhd_unit *drhd; struct dmar_drhd_unit *drhd;
int setup = 0; int setup = 0;
if (parse_ioapics_under_ir() != 1) {
printk(KERN_INFO "Not enable interrupt remapping\n");
return -1;
}
for_each_drhd_unit(drhd) { for_each_drhd_unit(drhd) {
struct intel_iommu *iommu = drhd->iommu; struct intel_iommu *iommu = drhd->iommu;