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Diffstat (limited to 'arch/s390/kvm/kvm-s390.c')
-rw-r--r--arch/s390/kvm/kvm-s390.c190
1 files changed, 173 insertions, 17 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 7f4bc58a53b9..4638303ba6a8 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -432,11 +432,18 @@ int kvm_arch_init(void *opaque)
/* Register floating interrupt controller interface. */
rc = kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);
if (rc) {
- pr_err("Failed to register FLIC rc=%d\n", rc);
+ pr_err("A FLIC registration call failed with rc=%d\n", rc);
goto out_debug_unreg;
}
+
+ rc = kvm_s390_gib_init(GAL_ISC);
+ if (rc)
+ goto out_gib_destroy;
+
return 0;
+out_gib_destroy:
+ kvm_s390_gib_destroy();
out_debug_unreg:
debug_unregister(kvm_s390_dbf);
return rc;
@@ -444,6 +451,7 @@ out_debug_unreg:
void kvm_arch_exit(void)
{
+ kvm_s390_gib_destroy();
debug_unregister(kvm_s390_dbf);
}
@@ -1258,11 +1266,65 @@ static int kvm_s390_set_processor_feat(struct kvm *kvm,
static int kvm_s390_set_processor_subfunc(struct kvm *kvm,
struct kvm_device_attr *attr)
{
- /*
- * Once supported by kernel + hw, we have to store the subfunctions
- * in kvm->arch and remember that user space configured them.
- */
- return -ENXIO;
+ mutex_lock(&kvm->lock);
+ if (kvm->created_vcpus) {
+ mutex_unlock(&kvm->lock);
+ return -EBUSY;
+ }
+
+ if (copy_from_user(&kvm->arch.model.subfuncs, (void __user *)attr->addr,
+ sizeof(struct kvm_s390_vm_cpu_subfunc))) {
+ mutex_unlock(&kvm->lock);
+ return -EFAULT;
+ }
+ mutex_unlock(&kvm->lock);
+
+ VM_EVENT(kvm, 3, "SET: guest PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[1],
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[2],
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[3]);
+ VM_EVENT(kvm, 3, "SET: guest PTFF subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KMAC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KMC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KM subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.km)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.km)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KIMD subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KLMD subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[1]);
+ VM_EVENT(kvm, 3, "SET: guest PCKMO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KMCTR subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KMF subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KMO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[1]);
+ VM_EVENT(kvm, 3, "SET: guest PCC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[1]);
+ VM_EVENT(kvm, 3, "SET: guest PPNO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[1]);
+ VM_EVENT(kvm, 3, "SET: guest KMA subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kma)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kma)[1]);
+
+ return 0;
}
static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
@@ -1381,12 +1443,56 @@ static int kvm_s390_get_machine_feat(struct kvm *kvm,
static int kvm_s390_get_processor_subfunc(struct kvm *kvm,
struct kvm_device_attr *attr)
{
- /*
- * Once we can actually configure subfunctions (kernel + hw support),
- * we have to check if they were already set by user space, if so copy
- * them from kvm->arch.
- */
- return -ENXIO;
+ if (copy_to_user((void __user *)attr->addr, &kvm->arch.model.subfuncs,
+ sizeof(struct kvm_s390_vm_cpu_subfunc)))
+ return -EFAULT;
+
+ VM_EVENT(kvm, 3, "GET: guest PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[1],
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[2],
+ ((unsigned long *) &kvm->arch.model.subfuncs.plo)[3]);
+ VM_EVENT(kvm, 3, "GET: guest PTFF subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KMAC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KMC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KM subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.km)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.km)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KIMD subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KLMD subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[1]);
+ VM_EVENT(kvm, 3, "GET: guest PCKMO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KMCTR subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KMF subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KMO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[1]);
+ VM_EVENT(kvm, 3, "GET: guest PCC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[1]);
+ VM_EVENT(kvm, 3, "GET: guest PPNO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[1]);
+ VM_EVENT(kvm, 3, "GET: guest KMA subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm->arch.model.subfuncs.kma)[0],
+ ((unsigned long *) &kvm->arch.model.subfuncs.kma)[1]);
+
+ return 0;
}
static int kvm_s390_get_machine_subfunc(struct kvm *kvm,
@@ -1395,8 +1501,55 @@ static int kvm_s390_get_machine_subfunc(struct kvm *kvm,
if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc,
sizeof(struct kvm_s390_vm_cpu_subfunc)))
return -EFAULT;
+
+ VM_EVENT(kvm, 3, "GET: host PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.plo)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.plo)[1],
+ ((unsigned long *) &kvm_s390_available_subfunc.plo)[2],
+ ((unsigned long *) &kvm_s390_available_subfunc.plo)[3]);
+ VM_EVENT(kvm, 3, "GET: host PTFF subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.ptff)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.ptff)[1]);
+ VM_EVENT(kvm, 3, "GET: host KMAC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.kmac)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.kmac)[1]);
+ VM_EVENT(kvm, 3, "GET: host KMC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.kmc)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.kmc)[1]);
+ VM_EVENT(kvm, 3, "GET: host KM subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.km)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.km)[1]);
+ VM_EVENT(kvm, 3, "GET: host KIMD subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.kimd)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.kimd)[1]);
+ VM_EVENT(kvm, 3, "GET: host KLMD subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.klmd)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.klmd)[1]);
+ VM_EVENT(kvm, 3, "GET: host PCKMO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.pckmo)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.pckmo)[1]);
+ VM_EVENT(kvm, 3, "GET: host KMCTR subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.kmctr)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.kmctr)[1]);
+ VM_EVENT(kvm, 3, "GET: host KMF subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.kmf)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.kmf)[1]);
+ VM_EVENT(kvm, 3, "GET: host KMO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.kmo)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.kmo)[1]);
+ VM_EVENT(kvm, 3, "GET: host PCC subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.pcc)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.pcc)[1]);
+ VM_EVENT(kvm, 3, "GET: host PPNO subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.ppno)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.ppno)[1]);
+ VM_EVENT(kvm, 3, "GET: host KMA subfunc 0x%16.16lx.%16.16lx",
+ ((unsigned long *) &kvm_s390_available_subfunc.kma)[0],
+ ((unsigned long *) &kvm_s390_available_subfunc.kma)[1]);
+
return 0;
}
+
static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
{
int ret = -ENXIO;
@@ -1514,10 +1667,9 @@ static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr)
case KVM_S390_VM_CPU_PROCESSOR_FEAT:
case KVM_S390_VM_CPU_MACHINE_FEAT:
case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
+ case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
ret = 0;
break;
- /* configuring subfunctions is not supported yet */
- case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
default:
ret = -ENXIO;
break;
@@ -2209,6 +2361,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
if (!kvm->arch.sie_page2)
goto out_err;
+ kvm->arch.sie_page2->kvm = kvm;
kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list;
for (i = 0; i < kvm_s390_fac_size(); i++) {
@@ -2218,6 +2371,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
kvm->arch.model.fac_list[i] = S390_lowcore.stfle_fac_list[i] &
kvm_s390_fac_base[i];
}
+ kvm->arch.model.subfuncs = kvm_s390_available_subfunc;
/* we are always in czam mode - even on pre z14 machines */
set_kvm_facility(kvm->arch.model.fac_mask, 138);
@@ -2812,7 +2966,7 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
vcpu->arch.sie_block->icpua = id;
spin_lock_init(&vcpu->arch.local_int.lock);
- vcpu->arch.sie_block->gd = (u32)(u64)kvm->arch.gisa;
+ vcpu->arch.sie_block->gd = (u32)(u64)kvm->arch.gisa_int.origin;
if (vcpu->arch.sie_block->gd && sclp.has_gisaf)
vcpu->arch.sie_block->gd |= GISA_FORMAT1;
seqcount_init(&vcpu->arch.cputm_seqcount);
@@ -3458,6 +3612,8 @@ static int vcpu_pre_run(struct kvm_vcpu *vcpu)
kvm_s390_patch_guest_per_regs(vcpu);
}
+ clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.gisa_int.kicked_mask);
+
vcpu->arch.sie_block->icptcode = 0;
cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags);
VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags);
@@ -4293,12 +4449,12 @@ static int __init kvm_s390_init(void)
int i;
if (!sclp.has_sief2) {
- pr_info("SIE not available\n");
+ pr_info("SIE is not available\n");
return -ENODEV;
}
if (nested && hpage) {
- pr_info("nested (vSIE) and hpage (huge page backing) can currently not be activated concurrently");
+ pr_info("A KVM host that supports nesting cannot back its KVM guests with huge pages\n");
return -EINVAL;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.