提交 d3d692c8 编写于 作者: D David Hildenbrand 提交者: Christian Borntraeger

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: NDavid Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: NChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
上级 b028ee3e
......@@ -1051,6 +1051,11 @@ static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
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;
}
......
......@@ -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);
}
......
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