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| author | David Hildenbrand <dahi@linux.vnet.ibm.com> | 2014-07-29 08:53:36 +0200 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2014-08-25 14:35:55 +0200 |
| commit | d3d692c82e4ed79ae7c85f8825ccfdb7d11819da (patch) | |
| tree | b731597f4d65bb4a379db9f2b74a4c2e2ec74022 /arch/s390 | |
| parent | KVM: s390: synchronize more registers with kvm_run (diff) | |
| download | linux-d3d692c82e4ed79ae7c85f8825ccfdb7d11819da.tar.xz linux-d3d692c82e4ed79ae7c85f8825ccfdb7d11819da.zip | |
KVM: s390: implement KVM_REQ_TLB_FLUSH and make use of it
Use the KVM_REQ_TLB_FLUSH request in order to trigger tlb flushes instead
of manipulating the SIE control block whenever we need it. Also trigger it for
a control register sync directly instead of (ab)using kvm_s390_set_prefix().
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 10 | ||||
| -rw-r--r-- | arch/s390/kvm/kvm-s390.h | 2 |
2 files changed, 9 insertions, 3 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index ab7cd645c127..56193becdca5 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -1051,6 +1051,11 @@ retry: goto retry; } + if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { + vcpu->arch.sie_block->ihcpu = 0xffff; + goto retry; + } + if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { if (!ibs_enabled(vcpu)) { trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); @@ -1306,7 +1311,8 @@ static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); - kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); + /* some control register changes require a tlb flush */ + kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); } if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { vcpu->arch.sie_block->cputm = kvm_run->s.regs.cputm; @@ -1519,7 +1525,7 @@ void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) * Another VCPU might have used IBS while we were offline. * Let's play safe and flush the VCPU at startup. */ - vcpu->arch.sie_block->ihcpu = 0xffff; + kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); spin_unlock(&vcpu->kvm->arch.start_stop_lock); return; } diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index 894fa4653dfb..54c25fd5bed6 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -70,7 +70,7 @@ static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu) static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) { vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT; - vcpu->arch.sie_block->ihcpu = 0xffff; + kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); } |