[PATCH v2 0/2] KVM: x86: avoid simultaneous queueing of both IRQ and SMI
From: Paolo Bonzini
Date: Wed Jun 01 2016 - 16:26:15 EST
This was reported as a vmentry failure while running Windows with SMM
enabled. It's not that rare if your processor lacks APICv---it happens
about 20-30% of the time while installing Windows 10.
I now understand the interrupt injection code (especially
complete_interrupts) better, and I also understand why the shortcut I took
in SMI handling was a bad idea. In the end the code is somewhat simpler
with the patch applied than before.
The bug report is at https://github.com/tianocore/edk2/issues/91, but it
also fixes other Windows failures that Laszlo had reported to me privately.
Paolo Bonzini (2):
KVM: x86: avoid simultaneous queueing of both IRQ and SMI
KVM: x86: rename process_smi to enter_smm, process_smi_request to
arch/x86/kvm/x86.c | 76 ++++++++++++++++++++++++++++++++----------------------
1 file changed, 45 insertions(+), 31 deletions(-)