path: root/virt
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authorJan Kiszka <jan.kiszka@siemens.com>2011-10-18 18:23:11 +0200
committerAvi Kivity <avi@redhat.com>2011-10-30 12:24:10 +0200
commitf1c1da2bde712812a3e0f9a7a7ebe7a916a4b5f4 (patch)
treedb3715f38fd012cece847d0f0918cbc12eb2123f /virt
parent7697e71f72b45a1bd0abe70918c383100fcc8514 (diff)
KVM: SVM: Keep intercepting task switching with NPT enabled
AMD processors apparently have a bug in the hardware task switching support when NPT is enabled. If the task switch triggers a NPF, we can get wrong EXITINTINFO along with that fault. On resume, spurious exceptions may then be injected into the guest. We were able to reproduce this bug when our guest triggered #SS and the handler were supposed to run over a separate task with not yet touched stack pages. Work around the issue by continuing to emulate task switches even in NPT mode. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'virt')
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