KVM: x86: Optimize NMI watchdog delivery

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As suggested by Avi, this patch introduces a counter of VCPUs that have
LVT0 set to NMI mode. Only if the counter > 0, we push the PIT ticks via
all LAPIC LVT0 lines to enable NMI watchdog support.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

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Jan Kiszka 2008-10-20 10:20:03 +02:00 • committed by Avi Kivity

parent 8fdb2351d5

commit cc6e462cd5

3 changed files with 27 additions and 8 deletions

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1

arch/x86/include/asm/kvm_host.h

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11

arch/x86/kvm/i8254.c

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23

arch/x86/kvm/lapic.c

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