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[Xen-devel] c/s 21886 change to DMAR table hiding
| To: | Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] c/s 21886 change to DMAR table hiding |
| From: | "Cihula, Joseph" <joseph.cihula@xxxxxxxxx> |
| Date: | Thu, 28 Oct 2010 23:06:33 -0700 |
| Accept-language: | en-US |
| Acceptlanguage: | en-US |
| Cc: | "Wang, Shane" <shane.wang@xxxxxxxxx>, "Kay, Allen M" <allen.m.kay@xxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Delivery-date: | Thu, 28 Oct 2010 23:08:18 -0700 |
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| Thread-index: | Act3L2+timXBBzVXSx2yevjo68Cw+w== |
| Thread-topic: | c/s 21886 change to DMAR table hiding |
Keir, In c/s 21886, you changed the method by which the DMAR ACPI table was hidden from dom0. Why was this change needed? - dmar->header.signature[0] = '\0'; + dmar->header.signature[0] = 'X'; + dmar->header.checksum -= 'X'-'D'; I ask because tboot was using the original method to unhide/re-hide the table during S3 (because the TXT launch on S3 resume requires a valid DMAR table) and this has broken S3 w/ TXT. Joe _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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