x86: kvmclock: Do not setup kvmclock vsyscall in the absence of that clock

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This fixes boot lockups with "no-kvmclock", when the host is not
exposing this particular feature (QEMU: -cpu ...,-kvmclock) or when
the kvmclock initialization failed for whatever reason.

Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>

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Jan Kiszka 2013-02-23 17:05:29 +01:00 • committed by Gleb Natapov

parent bd31a7f557

commit fe1140cc36

1 changed files with 8 additions and 1 deletions

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arch/x86/kernel/kvmclock.c

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