Messages in this thread | | | From | Paolo Bonzini <> | Subject | [PATCH 0/3] Infinite loops in microcode while running guests | Date | Tue, 10 Nov 2015 13:22:51 +0100 |
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Yes, these can happen. The issue is that benign exceptions are delivered serially, but two of them (#DB and #AC) can also happen during exception delivery itself. The subsequent infinite stream of exceptions causes the processor to never exit guest mode.
Paolo
Eric Northup (1): KVM: x86: work around infinite loop in microcode when #AC is delivered
Paolo Bonzini (2): KVM: svm: unconditionally intercept #DB KVM: x86: rename update_db_bp_intercept to update_bp_intercept
arch/x86/include/asm/kvm_host.h | 2 +- arch/x86/include/uapi/asm/svm.h | 1 + arch/x86/kvm/svm.c | 22 +++++++++++----------- arch/x86/kvm/vmx.c | 7 +++++-- arch/x86/kvm/x86.c | 2 +- 5 files changed, 19 insertions(+), 15 deletions(-)
-- 1.8.3.1
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