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| author | David Hildenbrand <dahi@linux.vnet.ibm.com> | 2016-01-26 12:51:06 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2016-06-21 09:43:39 +0200 |
| commit | 588438cba015ff3d14504b7598308dd3ebe06a99 (patch) | |
| tree | a8f42514f72f17ab5e1fdcaee3eb375306d4024f /arch/s390 | |
| parent | c9bc1eabe5ee49f1be68550cc0bd907b55d9da8d (diff) | |
| download | linux-0-day-588438cba015ff3d14504b7598308dd3ebe06a99.tar.gz linux-0-day-588438cba015ff3d14504b7598308dd3ebe06a99.tar.xz | |
KVM: s390: vsie: support run-time-instrumentation
As soon as guest 2 is allowed to use run-time-instrumentation (indicated
via via STFLE), it can also enable it for guest 3.
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kvm/vsie.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index 6d9f4058ce157..ebc988ffd3e50 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -312,6 +312,9 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) scb_s->eca |= scb_o->eca & 0x00020000U; scb_s->ecd |= scb_o->ecd & 0x20000000U; } + /* Run-time-Instrumentation */ + if (test_kvm_facility(vcpu->kvm, 64)) + scb_s->ecb3 |= scb_o->ecb3 & 0x01U; prepare_ibc(vcpu, vsie_page); rc = shadow_crycb(vcpu, vsie_page); @@ -464,6 +467,13 @@ static void unpin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) unpin_guest_page(vcpu->kvm, gpa, hpa); scb_s->gvrd = 0; } + + hpa = scb_s->riccbd; + if (hpa) { + gpa = scb_o->riccbd & ~0x3fUL; + unpin_guest_page(vcpu->kvm, gpa, hpa); + scb_s->riccbd = 0; + } } /* @@ -541,6 +551,22 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) goto unpin; scb_s->gvrd = hpa; } + + gpa = scb_o->riccbd & ~0x3fUL; + if (gpa && (scb_s->ecb3 & 0x01U)) { + if (!(gpa & ~0x1fffUL)) { + rc = set_validity_icpt(scb_s, 0x0043U); + goto unpin; + } + /* 64 bytes cannot cross page boundaries */ + rc = pin_guest_page(vcpu->kvm, gpa, &hpa); + if (rc == -EINVAL) + rc = set_validity_icpt(scb_s, 0x0043U); + /* Validity 0x0044 will be checked by SIE */ + if (rc) + goto unpin; + scb_s->gvrd = hpa; + } return 0; unpin: unpin_blocks(vcpu, vsie_page); |