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KVM: s390: Introduce new structures

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This patch adds new structures and updates some existing ones to
provide the base for Extended SCA functionality.

The old sca_* structures were renamed to bsca_* to keep things uniform.

The access to fields of SIGP controls were turned into bitfields instead
of hardcoded bitmasks.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Eugene (jno) Dvurechenski
2015-04-23 16:09:06 +02:00
committed by Christian Borntraeger
parent a6e2f683e7
commit bc784ccee5
4 changed files with 70 additions and 26 deletions
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14
arch/s390/kvm/kvm-s390.c
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@@ -1100,14 +1100,15 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
rc = -ENOMEM;
kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL);
kvm->arch.sca = (struct bsca_block *) get_zeroed_page(GFP_KERNEL);
if (!kvm->arch.sca)
goto out_err;
spin_lock(&kvm_lock);
sca_offset += 16;
if (sca_offset + sizeof(struct sca_block) > PAGE_SIZE)
if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE)
sca_offset = 0;
kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset);
kvm->arch.sca = (struct bsca_block *)
((char *) kvm->arch.sca + sca_offset);
spin_unlock(&kvm_lock);
sprintf(debug_name, "kvm-%u", current->pid);
@@ -1190,9 +1191,8 @@ void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id);
kvm_s390_clear_local_irqs(vcpu);
kvm_clear_async_pf_completion_queue(vcpu);
if (!kvm_is_ucontrol(vcpu->kvm)) {
if (!kvm_is_ucontrol(vcpu->kvm))
sca_del_vcpu(vcpu);
}
smp_mb();
if (kvm_is_ucontrol(vcpu->kvm))
@@ -1249,7 +1249,7 @@ static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu)
static void sca_del_vcpu(struct kvm_vcpu *vcpu)
{
struct sca_block *sca = vcpu->kvm->arch.sca;
struct bsca_block *sca = vcpu->kvm->arch.sca;
clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
if (sca->cpu[vcpu->vcpu_id].sda == (__u64) vcpu->arch.sie_block)
@@ -1259,7 +1259,7 @@ static void sca_del_vcpu(struct kvm_vcpu *vcpu)
static void sca_add_vcpu(struct kvm_vcpu *vcpu, struct kvm *kvm,
unsigned int id)
{
struct sca_block *sca = kvm->arch.sca;
struct bsca_block *sca = kvm->arch.sca;
if (!sca->cpu[id].sda)
sca->cpu[id].sda = (__u64) vcpu->arch.sie_block;