[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH][SVM] HVM fix for SWINT event injection
This patch resolves issues with booting/installing AMD-V HVM guests, including 32bit win2000, and 64bit vista/longhorn guests on xen-unstable. This patch modifies the AMD-V reinjection logic (intr.c) to not inject any SWINT that the processor was unable to execute (exitintinfo valid w/ type=4). The processor indicates that a SWINT was unsuccessful by filling in the exitintinfo field on an #PF intercept, during a world switch from SVM/guest mode. There were several cases observed during boot of win2000 and vista/longhorn 64b: Win2000 - A VMEXIT_EXCEPTION_PF (#PF intercept) occurs during execution of an "Int 10" instruction. The exitintinfo field is properly filled out by the processor containing type=4/vector=0x10. The call into paging_fault() to handle the #PF is not resolved (not_a_shadow_fault/0 returned), so the eventinj information is filled out in the #PF vmexit handler (to inject later). The svm_intr_assist() code is executed with both the eventinj, and the exitininfo fields filled out. In this case the #PF needs to be injected, ignoring the SWINT in the exitintinfo fields. Vista/Longhorn 64b - Similar to above, but the call into paging_fault() is resolved (EXCRET_fault_fixed returned), and in this case the SWINT in exitintifo should also be ignored. Please apply to xen-unstable. Applies cleanly to c/s 15651. Signed-off-by Tom Woller <thomas.woller@xxxxxxx> Note that HVM guests will not boot on AMD-V with xen-staging.hg c/s 15652. Keir, do you want me to take a look at staging c/s 15652 on AMD-V w/ HVM? --Tom thomas.woller@xxxxxxx +1-512-602-0059 AMD Corporation - Operating Systems Research Center 5204 E. Ben White Blvd. UBC1 Austin, Texas 78741 Attachment:
svm_inj_fix_for_hvm_15651.patch _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |