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KVM: x86: Optimize NMI watchdog delivery
authorJan Kiszka <jan.kiszka@siemens.com>
Mon, 20 Oct 2008 08:20:03 +0000 (10:20 +0200)
committerAvi Kivity <avi@redhat.com>
Wed, 31 Dec 2008 14:51:47 +0000 (16:51 +0200)
commitcc6e462cd54e64858ea25816df87d033229efe56
tree3f34b8be2ec3eb63e06c223b1d75d7068a717318tree | snapshot
parent8fdb2351d51b040146f10a624387bbd102d851c0commit | diff
KVM: x86: Optimize NMI watchdog delivery

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>
arch/x86/include/asm/kvm_host.h diff | blob | history
arch/x86/kvm/i8254.c diff | blob | history
arch/x86/kvm/lapic.c diff | blob | history
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