diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2016-06-20 22:33:48 -0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-06-27 15:30:41 +0200 |
| commit | b606f189c7d5bf9b875bba168162fe05287880fe (patch) | |
| tree | 20a06328aec2cbd036406e0e701cd21324a5f9fc | |
| parent | 8d93c874ac899bfdf0ad3787baef684a0c878c2c (diff) | |
KVM: LAPIC: cap __delay at lapic_timer_advance_ns
The host timer which emulates the guest LAPIC TSC deadline
timer has its expiration diminished by lapic_timer_advance_ns
nanoseconds. Therefore if, at wait_lapic_expire, a difference
larger than lapic_timer_advance_ns is encountered, delay at most
lapic_timer_advance_ns.
This fixes a problem where the guest can cause the host
to delay for large amounts of time.
Reported-by: Alan Jenkins <alan.christopher.jenkins@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>