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| author | Michael Mueller <mimu@linux.ibm.com> | 2019-01-31 09:52:40 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2019-02-05 14:29:23 +0100 |
| commit | 1282c21eb3dac324b8531bf2e0e0fbd9d5b6516b (patch) | |
| tree | 36cc203a721dea24ecd6b26d844fd7c448134391 /arch/s390/kvm/kvm-s390.h | |
| parent | s390/cio: add function chsc_sgib() (diff) | |
| download | linux-1282c21eb3dac324b8531bf2e0e0fbd9d5b6516b.tar.xz linux-1282c21eb3dac324b8531bf2e0e0fbd9d5b6516b.zip | |
KVM: s390: add the GIB and its related life-cyle functions
The Guest Information Block (GIB) links the GISA of all guests
that have adapter interrupts pending. These interrupts cannot be
delivered because all vcpus of these guests are currently in WAIT
state or have masked the respective Interruption Sub Class (ISC).
If enabled, a GIB alert is issued on the host to schedule these
guests to run suitable vcpus to consume the pending interruptions.
This mechanism allows to process adapter interrupts for currently
not running guests.
The GIB is created during host initialization and associated with
the Adapter Interruption Facility in case an Adapter Interruption
Virtualization Facility is available.
The GIB initialization and thus the activation of the related code
will be done in an upcoming patch of this series.
Signed-off-by: Michael Mueller <mimu@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Message-Id: <20190131085247.13826-10-mimu@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm/kvm-s390.h')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index 72ef87799593..6d9448dbd052 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -381,6 +381,8 @@ int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, void kvm_s390_gisa_init(struct kvm *kvm); void kvm_s390_gisa_clear(struct kvm *kvm); void kvm_s390_gisa_destroy(struct kvm *kvm); +int kvm_s390_gib_init(u8 nisc); +void kvm_s390_gib_destroy(void); /* implemented in guestdbg.c */ void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); |