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[Xen-devel] iommu=0 leading to panic when system defaults to using x2api
| To: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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| Subject: | [Xen-devel] iommu=0 leading to panic when system defaults to using x2apic |
| From: | "Jan Beulich" <JBeulich@xxxxxxxxxx> |
| Date: | Fri, 10 Dec 2010 09:12:21 +0000 |
| Delivery-date: | Fri, 10 Dec 2010 01:13:23 -0800 |
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Why wouldn't iommu=0 imply not using the x2apic, if use of the iommu indeed is a prerequisite (which by itself seems questionable as long as APIC IDs aren't wider than 8 bits)? Looking further at enable_bsp_x2apic(), I also wonder whether the pre-enabled case, when specifying iommu=0 and x2apic=0, can actually work if iommu=0 is a prerequisite (intremap_enabled() would return 1 in that case afaics, so the early check doesn't help). Thanks, Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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