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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2015-04-09 14:49:04 +0300 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2015-05-08 16:51:14 +0300 |
| commit | 8e23654687c97df1c0e4b1def245a05001eaf640 (patch) | |
| tree | 6b03aee4f322771861214c72788be2c4fe48e118 /arch/s390/kvm/kvm-s390.h | |
| parent | 53df84f8de312586e1c05a8f496f614ca814eeff (diff) | |
| download | linux-8e23654687c97df1c0e4b1def245a05001eaf640.tar.xz | |
KVM: s390: make exit_sie_sync more robust
exit_sie_sync is used to kick CPUs out of SIE and prevent reentering at
any point in time. This is used to reload the prefix pages and to
set the IBS stuff in a way that guarantees that after this function
returns we are no longer in SIE. All current users trigger KVM requests.
The request must be set before we block the CPUs to avoid races. Let's
make this implicit by adding the request into a new function
kvm_s390_sync_requests that replaces exit_sie_sync and split out
s390_vcpu_block and s390_vcpu_unblock, that can be used to keep
CPUs out of SIE independent of requests.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@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, 1 insertions, 1 deletions
diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index ca108b90ae56..8edca85e246e 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -214,7 +214,7 @@ void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); void s390_vcpu_block(struct kvm_vcpu *vcpu); void s390_vcpu_unblock(struct kvm_vcpu *vcpu); void exit_sie(struct kvm_vcpu *vcpu); -void exit_sie_sync(struct kvm_vcpu *vcpu); +void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu); int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu); /* is cmma enabled */ |