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| author | Cornelia Huck <cornelia.huck@de.ibm.com> | 2011-11-17 11:00:41 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-11-17 16:25:43 +0200 |
| commit | 9e6dabeffd1d0ec2aa19aa076c4886067238d442 (patch) | |
| tree | 6f5f2a06184a0e4ec0b8cff8db912ce6013c5056 /arch/s390/kvm/interrupt.c | |
| parent | 3439a8da16bcad6b0982ece938c9f8299bb53584 (diff) | |
| download | lwn-9e6dabeffd1d0ec2aa19aa076c4886067238d442.tar.gz lwn-9e6dabeffd1d0ec2aa19aa076c4886067238d442.zip | |
KVM: s390: Fix RUNNING flag misinterpretation
CPUSTAT_RUNNING was implemented signifying that a vcpu is not stopped.
This is not, however, what the architecture says: RUNNING should be
set when the host is acting on the behalf of the guest operating
system.
CPUSTAT_RUNNING has been changed to be set in kvm_arch_vcpu_load()
and to be unset in kvm_arch_vcpu_put().
For signifying stopped state of a vcpu, a host-controlled bit has
been used and is set/unset basically on the reverse as the old
CPUSTAT_RUNNING bit (including pushing it down into stop handling
proper in handle_stop()).
Cc: stable@kernel.org
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/s390/kvm/interrupt.c')
| -rw-r--r-- | arch/s390/kvm/interrupt.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index 87c16705b381..278ee009ce65 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -252,6 +252,7 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu, offsetof(struct _lowcore, restart_psw), sizeof(psw_t)); if (rc == -EFAULT) exception = 1; + atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); break; case KVM_S390_PROGRAM_INT: |