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| author | David Hildenbrand <dahi@linux.vnet.ibm.com> | 2015-11-25 11:02:26 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2016-06-21 09:43:39 +0200 |
| commit | 19c439b564b05939b83876a687bd48389d0aebb5 (patch) | |
| tree | d705805c43a58bf7dcd670af85ac40101e09d3ca /arch/s390 | |
| parent | KVM: s390: vsie: support run-time-instrumentation (diff) | |
| download | linux-19c439b564b05939b83876a687bd48389d0aebb5.tar.xz linux-19c439b564b05939b83876a687bd48389d0aebb5.zip | |
KVM: s390: vsie: support 64-bit-SCAO
Let's provide the 64-bit-SCAO facility to guest 2, so he can set up a SCA
for guest 3 that has a 64 bit address. Please note that we already require
the 64 bit SCAO for our vsie implementation, in order to forward the SCA
directly (by pinning the page).
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/include/uapi/asm/kvm.h | 1 | ||||
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 2 | ||||
| -rw-r--r-- | arch/s390/kvm/vsie.c | 4 |
3 files changed, 7 insertions, 0 deletions
diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h index 62423b1931c0..c5e4537e96d9 100644 --- a/arch/s390/include/uapi/asm/kvm.h +++ b/arch/s390/include/uapi/asm/kvm.h @@ -99,6 +99,7 @@ struct kvm_s390_vm_cpu_machine { #define KVM_S390_VM_CPU_FEAT_NR_BITS 1024 #define KVM_S390_VM_CPU_FEAT_ESOP 0 #define KVM_S390_VM_CPU_FEAT_SIEF2 1 +#define KVM_S390_VM_CPU_FEAT_64BSCAO 2 struct kvm_s390_vm_cpu_feat { __u64 feat[16]; }; diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 3fb124226e97..e0c5a57bf58b 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -265,6 +265,8 @@ static void kvm_s390_cpu_feat_init(void) !test_facility(3)) return; allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2); + if (sclp.has_64bscao) + allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO); } int kvm_arch_init(void *opaque) diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index ebc988ffd3e5..44e66c329026 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -449,6 +449,8 @@ static void unpin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) hpa = (u64) scb_s->scaoh << 32 | scb_s->scaol; if (hpa) { gpa = scb_o->scaol & ~0xfUL; + if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_64BSCAO)) + gpa |= (u64) scb_o->scaoh << 32; unpin_guest_page(vcpu->kvm, gpa, hpa); scb_s->scaol = 0; scb_s->scaoh = 0; @@ -499,6 +501,8 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) int rc = 0; gpa = scb_o->scaol & ~0xfUL; + if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_64BSCAO)) + gpa |= (u64) scb_o->scaoh << 32; if (gpa) { if (!(gpa & ~0x1fffUL)) rc = set_validity_icpt(scb_s, 0x0038U); |