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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2018-03-08 17:08:49 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2018-07-19 12:59:36 +0200 |
| commit | a3da7b4a3be51f37f434f14e11e60491f098b6ea (patch) | |
| tree | 1b68582e0b6c6a215e55050455f64859a6cac290 /arch/s390/kvm | |
| parent | KVM: s390/vsie: avoid sparse warning (diff) | |
| download | linux-a3da7b4a3be51f37f434f14e11e60491f098b6ea.tar.xz linux-a3da7b4a3be51f37f434f14e11e60491f098b6ea.zip | |
KVM: s390: add etoken support for guests
We want to provide facility 156 (etoken facility) to our
guests. This includes migration support (via sync regs) and
VSIE changes. The tokens are being reset on clear reset. This
has to be implemented by userspace (via sync regs).
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'arch/s390/kvm')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 8 | ||||
| -rw-r--r-- | arch/s390/kvm/vsie.c | 9 |
2 files changed, 13 insertions, 4 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index b350ec14d882..0cc8a48fc732 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -2355,6 +2355,8 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) vcpu->run->kvm_valid_regs |= KVM_SYNC_BPBC; if (test_kvm_facility(vcpu->kvm, 133)) vcpu->run->kvm_valid_regs |= KVM_SYNC_GSCB; + if (test_kvm_facility(vcpu->kvm, 156)) + vcpu->run->kvm_valid_regs |= KVM_SYNC_ETOKEN; /* fprs can be synchronized via vrs, even if the guest has no vx. With * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format. */ @@ -2604,7 +2606,8 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) } if (test_kvm_facility(vcpu->kvm, 139)) vcpu->arch.sie_block->ecd |= ECD_MEF; - + if (test_kvm_facility(vcpu->kvm, 156)) + vcpu->arch.sie_block->ecd |= ECD_ETOKENF; if (vcpu->arch.sie_block->gd) { vcpu->arch.sie_block->eca |= ECA_AIV; VCPU_EVENT(vcpu, 3, "AIV gisa format-%u enabled for cpu %03u", @@ -3522,6 +3525,7 @@ static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) } preempt_enable(); } + /* SIE will load etoken directly from SDNX and therefore kvm_run */ kvm_run->kvm_dirty_regs = 0; } @@ -3561,7 +3565,7 @@ static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) __ctl_clear_bit(2, 4); vcpu->arch.host_gscb = NULL; } - + /* SIE will save etoken directly into SDNX and therefore kvm_run */ } int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index 5539df037f91..63844b95c22c 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -2,7 +2,7 @@ /* * kvm nested virtualization support for s390x * - * Copyright IBM Corp. 2016 + * Copyright IBM Corp. 2016, 2018 * * Author(s): David Hildenbrand <dahi@linux.vnet.ibm.com> */ @@ -378,6 +378,10 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) if (test_kvm_facility(vcpu->kvm, 139)) scb_s->ecd |= scb_o->ecd & ECD_MEF; + /* etoken */ + if (test_kvm_facility(vcpu->kvm, 156)) + scb_s->ecd |= scb_o->ecd & ECD_ETOKENF; + prepare_ibc(vcpu, vsie_page); rc = shadow_crycb(vcpu, vsie_page); out: @@ -627,7 +631,8 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) vsie_page->riccbd_gpa = gpa; scb_s->riccbd = hpa; } - if ((scb_s->ecb & ECB_GS) && !(scb_s->ecd & ECD_HOSTREGMGMT)) { + if (((scb_s->ecb & ECB_GS) && !(scb_s->ecd & ECD_HOSTREGMGMT)) || + (scb_s->ecd & ECD_ETOKENF)) { unsigned long sdnxc; gpa = READ_ONCE(scb_o->sdnxo) & ~0xfUL; |