diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/kvm/vsie.c | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index 6b26b0be63c1..4e2c71cced48 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -239,6 +239,7 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) { struct kvm_s390_sie_block *scb_o = vsie_page->scb_o; struct kvm_s390_sie_block *scb_s = &vsie_page->scb_s; + bool had_tx = scb_s->ecb & 0x10U; unsigned long new_mso; int rc; @@ -299,6 +300,13 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) /* Host-protection-interruption introduced with ESOP */ if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_ESOP)) scb_s->ecb |= scb_o->ecb & 0x02U; + /* transactional execution */ + if (test_kvm_facility(vcpu->kvm, 73)) { + /* remap the prefix is tx is toggled on */ + if ((scb_o->ecb & 0x10U) && !had_tx) + prefix_unmapped(vsie_page); + scb_s->ecb |= scb_o->ecb & 0x10U; + } prepare_ibc(vcpu, vsie_page); rc = shadow_crycb(vcpu, vsie_page); @@ -337,13 +345,13 @@ void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start, prefix = cur->scb_s.prefix << GUEST_PREFIX_SHIFT; /* with mso/msl, the prefix lies at an offset */ prefix += cur->scb_s.mso; - if (prefix <= end && start <= prefix + PAGE_SIZE - 1) + if (prefix <= end && start <= prefix + 2 * PAGE_SIZE - 1) prefix_unmapped_sync(cur); } } /* - * Map the first prefix page. + * Map the first prefix page and if tx is enabled also the second prefix page. * * The prefix will be protected, a gmap notifier will inform about unmaps. * The shadow scb must not be executed until the prefix is remapped, this is @@ -370,6 +378,9 @@ static int map_prefix(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) prefix += scb_s->mso; rc = kvm_s390_shadow_fault(vcpu, vsie_page->gmap, prefix); + if (!rc && (scb_s->ecb & 0x10U)) + rc = kvm_s390_shadow_fault(vcpu, vsie_page->gmap, + prefix + PAGE_SIZE); /* * We don't have to mprotect, we will be called for all unshadows. * SIE will detect if protection applies and trigger a validity. @@ -434,6 +445,13 @@ static void unpin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) scb_s->scaol = 0; scb_s->scaoh = 0; } + + hpa = scb_s->itdba; + if (hpa) { + gpa = scb_o->itdba & ~0xffUL; + unpin_guest_page(vcpu->kvm, gpa, hpa); + scb_s->itdba = 0; + } } /* @@ -477,6 +495,21 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) scb_s->scaoh = (u32)((u64)hpa >> 32); scb_s->scaol = (u32)(u64)hpa; } + + gpa = scb_o->itdba & ~0xffUL; + if (gpa && (scb_s->ecb & 0x10U)) { + if (!(gpa & ~0x1fffU)) { + rc = set_validity_icpt(scb_s, 0x0080U); + goto unpin; + } + /* 256 bytes cannot cross page boundaries */ + rc = pin_guest_page(vcpu->kvm, gpa, &hpa); + if (rc == -EINVAL) + rc = set_validity_icpt(scb_s, 0x0080U); + if (rc) + goto unpin; + scb_s->itdba = hpa; + } return 0; unpin: unpin_blocks(vcpu, vsie_page); |