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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>
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@ -570,9 +570,6 @@ int __init dmar_table_init(void)
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printk(KERN_INFO PREFIX "No ATSR found\n");
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#endif
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#ifdef CONFIG_INTR_REMAP
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parse_ioapics_under_ir();
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#endif
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return 0;
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}
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@ -626,6 +626,11 @@ int __init enable_intr_remapping(int eim)
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struct dmar_drhd_unit *drhd;
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int setup = 0;
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if (parse_ioapics_under_ir() != 1) {
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printk(KERN_INFO "Not enable interrupt remapping\n");
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return -1;
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}
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for_each_drhd_unit(drhd) {
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struct intel_iommu *iommu = drhd->iommu;
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