From 27406cd50cf6653196eea8ebbb15a75596da01ca Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Tue, 14 Apr 2015 12:17:34 +0200 Subject: KVM: s390: provide functions for blocking all CPUs Some updates to the control blocks need to be done in a way that ensures that no CPU is within SIE. Provide wrappers around the s390_vcpu_block functions and adopt the TOD migration code to update in a guaranteed fashion. Also rename these functions to have the kvm_s390_ prefix as everything else. Signed-off-by: Christian Borntraeger Reviewed-by: David Hildenbrand --- arch/s390/kvm/kvm-s390.h | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) (limited to 'arch/s390/kvm/kvm-s390.h') diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index 8edca85e246e..c5704786e473 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -211,8 +211,8 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr); int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr); void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu); 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 kvm_s390_vcpu_block(struct kvm_vcpu *vcpu); +void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu); void exit_sie(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); @@ -228,6 +228,25 @@ int kvm_s390_handle_diag(struct kvm_vcpu *vcpu); int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, struct kvm_s390_pgm_info *pgm_info); +static inline void kvm_s390_vcpu_block_all(struct kvm *kvm) +{ + int i; + struct kvm_vcpu *vcpu; + + WARN_ON(!mutex_is_locked(&kvm->lock)); + kvm_for_each_vcpu(i, vcpu, kvm) + kvm_s390_vcpu_block(vcpu); +} + +static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm) +{ + int i; + struct kvm_vcpu *vcpu; + + kvm_for_each_vcpu(i, vcpu, kvm) + kvm_s390_vcpu_unblock(vcpu); +} + /** * kvm_s390_inject_prog_cond - conditionally inject a program check * @vcpu: virtual cpu -- cgit v1.2.3