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| author | Paolo Bonzini <pbonzini@redhat.com> | 2021-03-25 14:11:14 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-04-01 05:14:19 -0400 |
| commit | a83829f56c7ce17d5d05370820e185d9a23d3090 (patch) | |
| tree | e275a6777f41ee7b54f97b298265da2eb2d24583 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | c2c647f91aec192f45f0849c225f134183cf4e90 (diff) | |
KVM: x86: disable interrupts while pvclock_gtod_sync_lock is taken
pvclock_gtod_sync_lock can be taken with interrupts disabled if the
preempt notifier calls get_kvmclock_ns to update the Xen
runstate information:
spin_lock include/linux/spinlock.h:354 [inline]
get_kvmclock_ns+0x25/0x390 arch/x86/kvm/x86.c:2587
kvm_xen_update_runstate+0x3d/0x2c0 arch/x86/kvm/xen.c:69
kvm_xen_update_runstate_guest+0x74/0x320 arch/x86/kvm/xen.c:100
kvm_xen_runstate_set_preempted arch/x86/kvm/xen.h:96 [inline]
kvm_arch_vcpu_put+0x2d8/0x5a0 arch/x86/kvm/x86.c:4062
So change the users of the spinlock to spin_lock_irqsave and
spin_unlock_irqrestore.
Reported-by: syzbot+b282b65c2c68492df769@syzkaller.appspotmail.com
Fixes: 30b5c851af79 ("KVM: x86/xen: Add support for vCPU runstate information")
Cc: David Woodhouse <dwmw@amazon.co.uk>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions