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Diffstat (limited to 'arch/s390/kvm/kvm-s390.c')
-rw-r--r--arch/s390/kvm/kvm-s390.c157
1 files changed, 122 insertions, 35 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index fd6cd05bb6a7..689ac48361c6 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -273,9 +273,13 @@ static void kvm_s390_cpu_feat_init(void)
kvm_s390_available_subfunc.pcc);
}
if (test_facility(57)) /* MSA5 */
- __cpacf_query(CPACF_PPNO, (cpacf_mask_t *)
+ __cpacf_query(CPACF_PRNO, (cpacf_mask_t *)
kvm_s390_available_subfunc.ppno);
+ if (test_facility(146)) /* MSA8 */
+ __cpacf_query(CPACF_KMA, (cpacf_mask_t *)
+ kvm_s390_available_subfunc.kma);
+
if (MACHINE_HAS_ESOP)
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP);
/*
@@ -300,6 +304,8 @@ static void kvm_s390_cpu_feat_init(void)
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI);
if (sclp.has_ibs)
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS);
+ if (sclp.has_kss)
+ allow_cpu_feat(KVM_S390_VM_CPU_FEAT_KSS);
/*
* KVM_S390_VM_CPU_FEAT_SKEY: Wrong shadow of PTE.I bits will make
* all skey handling functions read/set the skey from the PGSTE
@@ -380,6 +386,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_S390_SKEYS:
case KVM_CAP_S390_IRQ_STATE:
case KVM_CAP_S390_USER_INSTR0:
+ case KVM_CAP_S390_AIS:
r = 1;
break;
case KVM_CAP_S390_MEM_OP:
@@ -405,6 +412,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_S390_RI:
r = test_facility(64);
break;
+ case KVM_CAP_S390_GS:
+ r = test_facility(133);
+ break;
default:
r = 0;
}
@@ -541,6 +551,34 @@ static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s",
r ? "(not available)" : "(success)");
break;
+ case KVM_CAP_S390_AIS:
+ mutex_lock(&kvm->lock);
+ if (kvm->created_vcpus) {
+ r = -EBUSY;
+ } else {
+ set_kvm_facility(kvm->arch.model.fac_mask, 72);
+ set_kvm_facility(kvm->arch.model.fac_list, 72);
+ kvm->arch.float_int.ais_enabled = 1;
+ r = 0;
+ }
+ mutex_unlock(&kvm->lock);
+ VM_EVENT(kvm, 3, "ENABLE: AIS %s",
+ r ? "(not available)" : "(success)");
+ break;
+ case KVM_CAP_S390_GS:
+ r = -EINVAL;
+ mutex_lock(&kvm->lock);
+ if (atomic_read(&kvm->online_vcpus)) {
+ r = -EBUSY;
+ } else if (test_facility(133)) {
+ set_kvm_facility(kvm->arch.model.fac_mask, 133);
+ set_kvm_facility(kvm->arch.model.fac_list, 133);
+ r = 0;
+ }
+ mutex_unlock(&kvm->lock);
+ VM_EVENT(kvm, 3, "ENABLE: CAP_S390_GS %s",
+ r ? "(not available)" : "(success)");
+ break;
case KVM_CAP_S390_USER_STSI:
VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI");
kvm->arch.user_stsi = 1;
@@ -1166,10 +1204,7 @@ static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
return -EINVAL;
- keys = kmalloc_array(args->count, sizeof(uint8_t),
- GFP_KERNEL | __GFP_NOWARN);
- if (!keys)
- keys = vmalloc(sizeof(uint8_t) * args->count);
+ keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL);
if (!keys)
return -ENOMEM;
@@ -1211,10 +1246,7 @@ static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
return -EINVAL;
- keys = kmalloc_array(args->count, sizeof(uint8_t),
- GFP_KERNEL | __GFP_NOWARN);
- if (!keys)
- keys = vmalloc(sizeof(uint8_t) * args->count);
+ keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL);
if (!keys)
return -ENOMEM;
@@ -1498,6 +1530,10 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
kvm_s390_crypto_init(kvm);
+ mutex_init(&kvm->arch.float_int.ais_lock);
+ kvm->arch.float_int.simm = 0;
+ kvm->arch.float_int.nimm = 0;
+ kvm->arch.float_int.ais_enabled = 0;
spin_lock_init(&kvm->arch.float_int.lock);
for (i = 0; i < FIRQ_LIST_COUNT; i++)
INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]);
@@ -1512,9 +1548,9 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT;
} else {
if (sclp.hamax == U64_MAX)
- kvm->arch.mem_limit = TASK_MAX_SIZE;
+ kvm->arch.mem_limit = TASK_SIZE_MAX;
else
- kvm->arch.mem_limit = min_t(unsigned long, TASK_MAX_SIZE,
+ kvm->arch.mem_limit = min_t(unsigned long, TASK_SIZE_MAX,
sclp.hamax + 1);
kvm->arch.gmap = gmap_create(current->mm, kvm->arch.mem_limit - 1);
if (!kvm->arch.gmap)
@@ -1646,7 +1682,7 @@ static void sca_add_vcpu(struct kvm_vcpu *vcpu)
sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU;
- vcpu->arch.sie_block->ecb2 |= 0x04U;
+ vcpu->arch.sie_block->ecb2 |= ECB2_ESCA;
set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
} else {
struct bsca_block *sca = vcpu->kvm->arch.sca;
@@ -1700,7 +1736,7 @@ static int sca_switch_to_extended(struct kvm *kvm)
kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) {
vcpu->arch.sie_block->scaoh = scaoh;
vcpu->arch.sie_block->scaol = scaol;
- vcpu->arch.sie_block->ecb2 |= 0x04U;
+ vcpu->arch.sie_block->ecb2 |= ECB2_ESCA;
}
kvm->arch.sca = new_sca;
kvm->arch.use_esca = 1;
@@ -1749,6 +1785,8 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
kvm_s390_set_prefix(vcpu, 0);
if (test_kvm_facility(vcpu->kvm, 64))
vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB;
+ if (test_kvm_facility(vcpu->kvm, 133))
+ vcpu->run->kvm_valid_regs |= KVM_SYNC_GSCB;
/* 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.
*/
@@ -1939,8 +1977,8 @@ int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu)
if (!vcpu->arch.sie_block->cbrlo)
return -ENOMEM;
- vcpu->arch.sie_block->ecb2 |= 0x80;
- vcpu->arch.sie_block->ecb2 &= ~0x08;
+ vcpu->arch.sie_block->ecb2 |= ECB2_CMMA;
+ vcpu->arch.sie_block->ecb2 &= ~ECB2_PFMFI;
return 0;
}
@@ -1970,31 +2008,37 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
/* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */
if (MACHINE_HAS_ESOP)
- vcpu->arch.sie_block->ecb |= 0x02;
+ vcpu->arch.sie_block->ecb |= ECB_HOSTPROTINT;
if (test_kvm_facility(vcpu->kvm, 9))
- vcpu->arch.sie_block->ecb |= 0x04;
+ vcpu->arch.sie_block->ecb |= ECB_SRSI;
if (test_kvm_facility(vcpu->kvm, 73))
- vcpu->arch.sie_block->ecb |= 0x10;
+ vcpu->arch.sie_block->ecb |= ECB_TE;
if (test_kvm_facility(vcpu->kvm, 8) && sclp.has_pfmfi)
- vcpu->arch.sie_block->ecb2 |= 0x08;
+ vcpu->arch.sie_block->ecb2 |= ECB2_PFMFI;
if (test_kvm_facility(vcpu->kvm, 130))
- vcpu->arch.sie_block->ecb2 |= 0x20;
- vcpu->arch.sie_block->eca = 0x1002000U;
+ vcpu->arch.sie_block->ecb2 |= ECB2_IEP;
+ vcpu->arch.sie_block->eca = ECA_MVPGI | ECA_PROTEXCI;
if (sclp.has_cei)
- vcpu->arch.sie_block->eca |= 0x80000000U;
+ vcpu->arch.sie_block->eca |= ECA_CEI;
if (sclp.has_ib)
- vcpu->arch.sie_block->eca |= 0x40000000U;
+ vcpu->arch.sie_block->eca |= ECA_IB;
if (sclp.has_siif)
- vcpu->arch.sie_block->eca |= 1;
+ vcpu->arch.sie_block->eca |= ECA_SII;
if (sclp.has_sigpif)
- vcpu->arch.sie_block->eca |= 0x10000000U;
+ vcpu->arch.sie_block->eca |= ECA_SIGPI;
if (test_kvm_facility(vcpu->kvm, 129)) {
- vcpu->arch.sie_block->eca |= 0x00020000;
- vcpu->arch.sie_block->ecd |= 0x20000000;
+ vcpu->arch.sie_block->eca |= ECA_VX;
+ vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
}
+ vcpu->arch.sie_block->sdnxo = ((unsigned long) &vcpu->run->s.regs.sdnx)
+ | SDNXC;
vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb;
- vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
+
+ if (sclp.has_kss)
+ atomic_or(CPUSTAT_KSS, &vcpu->arch.sie_block->cpuflags);
+ else
+ vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
if (vcpu->kvm->arch.use_cmma) {
rc = kvm_s390_vcpu_setup_cmma(vcpu);
@@ -2446,7 +2490,7 @@ retry:
}
/* nothing to do, just clear the request */
- clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
+ kvm_clear_request(KVM_REQ_UNHALT, vcpu);
return 0;
}
@@ -2719,6 +2763,11 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
+ struct runtime_instr_cb *riccb;
+ struct gs_cb *gscb;
+
+ riccb = (struct runtime_instr_cb *) &kvm_run->s.regs.riccb;
+ gscb = (struct gs_cb *) &kvm_run->s.regs.gscb;
vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask;
vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr;
if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX)
@@ -2747,12 +2796,24 @@ static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
* we should enable RI here instead of doing the lazy enablement.
*/
if ((kvm_run->kvm_dirty_regs & KVM_SYNC_RICCB) &&
- test_kvm_facility(vcpu->kvm, 64)) {
- struct runtime_instr_cb *riccb =
- (struct runtime_instr_cb *) &kvm_run->s.regs.riccb;
-
- if (riccb->valid)
- vcpu->arch.sie_block->ecb3 |= 0x01;
+ test_kvm_facility(vcpu->kvm, 64) &&
+ riccb->valid &&
+ !(vcpu->arch.sie_block->ecb3 & ECB3_RI)) {
+ VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (sync_regs)");
+ vcpu->arch.sie_block->ecb3 |= ECB3_RI;
+ }
+ /*
+ * If userspace sets the gscb (e.g. after migration) to non-zero,
+ * we should enable GS here instead of doing the lazy enablement.
+ */
+ if ((kvm_run->kvm_dirty_regs & KVM_SYNC_GSCB) &&
+ test_kvm_facility(vcpu->kvm, 133) &&
+ gscb->gssm &&
+ !vcpu->arch.gs_enabled) {
+ VCPU_EVENT(vcpu, 3, "%s", "ENABLE: GS (sync_regs)");
+ vcpu->arch.sie_block->ecb |= ECB_GS;
+ vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
+ vcpu->arch.gs_enabled = 1;
}
save_access_regs(vcpu->arch.host_acrs);
restore_access_regs(vcpu->run->s.regs.acrs);
@@ -2768,6 +2829,20 @@ static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
if (test_fp_ctl(current->thread.fpu.fpc))
/* User space provided an invalid FPC, let's clear it */
current->thread.fpu.fpc = 0;
+ if (MACHINE_HAS_GS) {
+ preempt_disable();
+ __ctl_set_bit(2, 4);
+ if (current->thread.gs_cb) {
+ vcpu->arch.host_gscb = current->thread.gs_cb;
+ save_gs_cb(vcpu->arch.host_gscb);
+ }
+ if (vcpu->arch.gs_enabled) {
+ current->thread.gs_cb = (struct gs_cb *)
+ &vcpu->run->s.regs.gscb;
+ restore_gs_cb(current->thread.gs_cb);
+ }
+ preempt_enable();
+ }
kvm_run->kvm_dirty_regs = 0;
}
@@ -2794,6 +2869,18 @@ static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
/* Restore will be done lazily at return */
current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc;
current->thread.fpu.regs = vcpu->arch.host_fpregs.regs;
+ if (MACHINE_HAS_GS) {
+ __ctl_set_bit(2, 4);
+ if (vcpu->arch.gs_enabled)
+ save_gs_cb(current->thread.gs_cb);
+ preempt_disable();
+ current->thread.gs_cb = vcpu->arch.host_gscb;
+ restore_gs_cb(vcpu->arch.host_gscb);
+ preempt_enable();
+ if (!vcpu->arch.host_gscb)
+ __ctl_clear_bit(2, 4);
+ vcpu->arch.host_gscb = NULL;
+ }
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.