KVM: s390: features and fixes for 4.7 part2
- Use hardware provided information about facility bits that do not need any hypervisor activitiy - Add missing documentation for KVM_CAP_S390_RI - Some updates/fixes for handling cpu models and facilities -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (GNU/Linux) iQIcBAABAgAGBQJXMID5AAoJEBF7vIC1phx8CfIP/1HVUvuD1mKTQVXMNEaC0CVK hi31MqFXe2/PQRX+s6T25XYHtKyDKnVoZeXl94iVvHOB0lmz8AgfwBOuWewr4beM NF73TVhWYq3QidIEg0usFKrVt08SDvZoyBNTH0kGeplQpDhaRC233/oTl6fFO/UQ 5YUK9wnUXHuovYHbqvST0xRkRu8xjxEa7JgJCQqPHQLLmbDTe88XyTSSWDfe+xUe COcgVJgyKOJDDqgrEcYwcsoOxfKKapRSeKq7nq6IJYEGB2JrwyVtb9JRIIHMnXYl 1tYVy4gtIP64UeyXJ3IM1OfU3fjKJYVHBIRZONGSo2P60XqVsqQ9z8OstGwbHoPM XOEga5X54ir+Im9sJfJK4vDBzBjnFagQnhohUgs2dPg/S4uxuulSU9hdr9iQhuhy 179uDZjwpOAMSo4qv8Mupa1WDhy4UeM9nsQICGrfmQPcyoJ/+2lQtTgkWYpbkr30 P3i+Yh0+aKEqdbb7Qog9Y8pAJyNSgy5++xR+5IeVcMfhtdl2YbsLH3WoKTanxPYB g28xsvhwsBF92DXAIrWq/gQcZIZr0z+U+ggwmZDXJ1xipIP1rME7wWZj3mXEo+2Z 0pWxTSsZO0HS9niJ1RFfJkkHuQ8X/hR9hzz3Lsy6NkfyqgcZVtVrkFkiuJ7OGAw/ Gcn4bkyYKkrICcpU5CeV =eTE9 -----END PGP SIGNATURE----- Merge tag 'kvm-s390-next-4.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD KVM: s390: features and fixes for 4.7 part2 - Use hardware provided information about facility bits that do not need any hypervisor activitiy - Add missing documentation for KVM_CAP_S390_RI - Some updates/fixes for handling cpu models and facilities
This commit is contained in:
Paolo Bonzini
commit
6ac0f61f47
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@ -3788,6 +3788,14 @@ a KVM_EXIT_IOAPIC_EOI vmexit will be reported to userspace.
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Fails if VCPU has already been created, or if the irqchip is already in the
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kernel (i.e. KVM_CREATE_IRQCHIP has already been called).
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7.6 KVM_CAP_S390_RI
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Architectures: s390
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Parameters: none
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Allows use of runtime-instrumentation introduced with zEC12 processor.
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Will return -EINVAL if the machine does not support runtime-instrumentation.
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Will return -EBUSY if a VCPU has already been created.
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8. Other capabilities.
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----------------------
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@ -544,10 +544,6 @@ struct kvm_vcpu_arch {
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struct kvm_s390_local_interrupt local_int;
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struct hrtimer ckc_timer;
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struct kvm_s390_pgm_info pgm;
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union {
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struct cpuid cpu_id;
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u64 stidp_data;
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};
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struct gmap *gmap;
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struct kvm_guestdbg_info_arch guestdbg;
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unsigned long pfault_token;
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@ -605,7 +601,7 @@ struct kvm_s390_cpu_model {
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__u64 fac_mask[S390_ARCH_FAC_LIST_SIZE_U64];
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/* facility list requested by guest (in dma page) */
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__u64 *fac_list;
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struct cpuid cpu_id;
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u64 cpuid;
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unsigned short ibc;
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};
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@ -69,6 +69,7 @@ struct sclp_info {
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unsigned int max_cores;
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unsigned long hsa_size;
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unsigned long facilities;
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unsigned int hmfai;
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};
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extern struct sclp_info sclp;
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@ -27,6 +27,7 @@
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/* SIGP cpu status bits */
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#define SIGP_STATUS_INVALID_ORDER 0x00000002UL
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#define SIGP_STATUS_CHECK_STOP 0x00000010UL
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#define SIGP_STATUS_STOPPED 0x00000040UL
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#define SIGP_STATUS_EXT_CALL_PENDING 0x00000080UL
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@ -118,9 +118,9 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
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};
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/* upper facilities limit for kvm */
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unsigned long kvm_s390_fac_list_mask[] = {
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0xffe6fffbfcfdfc40UL,
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0x005e800000000000UL,
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unsigned long kvm_s390_fac_list_mask[16] = {
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0xffe6000000000000UL,
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0x005e000000000000UL,
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};
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unsigned long kvm_s390_fac_list_mask_size(void)
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@ -638,6 +638,7 @@ static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr)
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static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr)
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{
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struct kvm_s390_vm_cpu_processor *proc;
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u16 lowest_ibc, unblocked_ibc;
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int ret = 0;
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mutex_lock(&kvm->lock);
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@ -652,9 +653,17 @@ static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr)
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}
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if (!copy_from_user(proc, (void __user *)attr->addr,
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sizeof(*proc))) {
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memcpy(&kvm->arch.model.cpu_id, &proc->cpuid,
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sizeof(struct cpuid));
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kvm->arch.model.ibc = proc->ibc;
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kvm->arch.model.cpuid = proc->cpuid;
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lowest_ibc = sclp.ibc >> 16 & 0xfff;
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unblocked_ibc = sclp.ibc & 0xfff;
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if (lowest_ibc) {
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if (proc->ibc > unblocked_ibc)
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kvm->arch.model.ibc = unblocked_ibc;
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else if (proc->ibc < lowest_ibc)
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kvm->arch.model.ibc = lowest_ibc;
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else
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kvm->arch.model.ibc = proc->ibc;
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}
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memcpy(kvm->arch.model.fac_list, proc->fac_list,
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S390_ARCH_FAC_LIST_SIZE_BYTE);
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} else
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@ -687,7 +696,7 @@ static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr)
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ret = -ENOMEM;
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goto out;
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}
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memcpy(&proc->cpuid, &kvm->arch.model.cpu_id, sizeof(struct cpuid));
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proc->cpuid = kvm->arch.model.cpuid;
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proc->ibc = kvm->arch.model.ibc;
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memcpy(&proc->fac_list, kvm->arch.model.fac_list,
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S390_ARCH_FAC_LIST_SIZE_BYTE);
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@ -1081,10 +1090,13 @@ static void kvm_s390_set_crycb_format(struct kvm *kvm)
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kvm->arch.crypto.crycbd |= CRYCB_FORMAT1;
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}
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static void kvm_s390_get_cpu_id(struct cpuid *cpu_id)
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static u64 kvm_s390_get_initial_cpuid(void)
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{
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get_cpu_id(cpu_id);
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cpu_id->version = 0xff;
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struct cpuid cpuid;
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get_cpu_id(&cpuid);
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cpuid.version = 0xff;
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return *((u64 *) &cpuid);
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}
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static void kvm_s390_crypto_init(struct kvm *kvm)
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@ -1175,7 +1187,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
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memcpy(kvm->arch.model.fac_list, kvm->arch.model.fac_mask,
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S390_ARCH_FAC_LIST_SIZE_BYTE);
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kvm_s390_get_cpu_id(&kvm->arch.model.cpu_id);
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kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid();
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kvm->arch.model.ibc = sclp.ibc & 0x0fff;
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kvm_s390_crypto_init(kvm);
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@ -1624,7 +1636,6 @@ static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu)
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{
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struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model;
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vcpu->arch.cpu_id = model->cpu_id;
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vcpu->arch.sie_block->ibc = model->ibc;
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if (test_kvm_facility(vcpu->kvm, 7))
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vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list;
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@ -1645,11 +1656,14 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
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kvm_s390_vcpu_setup_model(vcpu);
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vcpu->arch.sie_block->ecb = 6;
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vcpu->arch.sie_block->ecb = 0x02;
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if (test_kvm_facility(vcpu->kvm, 9))
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vcpu->arch.sie_block->ecb |= 0x04;
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if (test_kvm_facility(vcpu->kvm, 50) && test_kvm_facility(vcpu->kvm, 73))
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vcpu->arch.sie_block->ecb |= 0x10;
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vcpu->arch.sie_block->ecb2 = 8;
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if (test_kvm_facility(vcpu->kvm, 8))
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vcpu->arch.sie_block->ecb2 |= 0x08;
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vcpu->arch.sie_block->eca = 0xC1002000U;
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if (sclp.has_siif)
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vcpu->arch.sie_block->eca |= 1;
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@ -2971,13 +2985,26 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
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return;
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}
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static inline unsigned long nonhyp_mask(int i)
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{
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unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30;
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return 0x0000ffffffffffffUL >> (nonhyp_fai << 4);
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}
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static int __init kvm_s390_init(void)
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{
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int i;
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if (!sclp.has_sief2) {
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pr_info("SIE not available\n");
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return -ENODEV;
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}
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for (i = 0; i < 16; i++)
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kvm_s390_fac_list_mask[i] |=
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S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i);
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return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
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}
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@ -439,7 +439,7 @@ static int handle_lpswe(struct kvm_vcpu *vcpu)
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static int handle_stidp(struct kvm_vcpu *vcpu)
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{
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u64 stidp_data = vcpu->arch.stidp_data;
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u64 stidp_data = vcpu->kvm->arch.model.cpuid;
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u64 operand2;
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int rc;
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ar_t ar;
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@ -670,8 +670,9 @@ static int handle_pfmf(struct kvm_vcpu *vcpu)
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if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED)
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return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
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/* Only provide non-quiescing support if the host supports it */
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if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ && !test_facility(14))
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/* Only provide non-quiescing support if enabled for the guest */
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if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ &&
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!test_kvm_facility(vcpu->kvm, 14))
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return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
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/* No support for conditional-SSKE */
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@ -744,7 +745,7 @@ static int handle_essa(struct kvm_vcpu *vcpu)
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{
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/* entries expected to be 1FF */
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int entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3;
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unsigned long *cbrlo, cbrle;
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unsigned long *cbrlo;
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struct gmap *gmap;
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int i;
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@ -765,17 +766,9 @@ static int handle_essa(struct kvm_vcpu *vcpu)
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vcpu->arch.sie_block->cbrlo &= PAGE_MASK; /* reset nceo */
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cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo);
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down_read(&gmap->mm->mmap_sem);
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for (i = 0; i < entries; ++i) {
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cbrle = cbrlo[i];
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if (unlikely(cbrle & ~PAGE_MASK || cbrle < 2 * PAGE_SIZE))
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/* invalid entry */
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break;
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/* try to free backing */
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__gmap_zap(gmap, cbrle);
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}
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for (i = 0; i < entries; ++i)
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__gmap_zap(gmap, cbrlo[i]);
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up_read(&gmap->mm->mmap_sem);
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if (i < entries)
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return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
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return 0;
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}
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@ -240,6 +240,12 @@ static int __sigp_sense_running(struct kvm_vcpu *vcpu,
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struct kvm_s390_local_interrupt *li;
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int rc;
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if (!test_kvm_facility(vcpu->kvm, 9)) {
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*reg &= 0xffffffff00000000UL;
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*reg |= SIGP_STATUS_INVALID_ORDER;
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return SIGP_CC_STATUS_STORED;
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}
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li = &dst_vcpu->arch.local_int;
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if (atomic_read(li->cpuflags) & CPUSTAT_RUNNING) {
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/* running */
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@ -49,7 +49,9 @@ struct read_info_sccb {
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u8 _pad_117[119 - 117]; /* 117-118 */
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u8 fac119; /* 119 */
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u16 hcpua; /* 120-121 */
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u8 _pad_122[4096 - 122]; /* 122-4095 */
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u8 _pad_122[124 - 122]; /* 122-123 */
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u32 hmfai; /* 124-127 */
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u8 _pad_128[4096 - 128]; /* 128-4095 */
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} __packed __aligned(PAGE_SIZE);
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static char sccb_early[PAGE_SIZE] __aligned(PAGE_SIZE) __initdata;
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@ -155,6 +157,8 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
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sclp.mtid = (sccb->fac42 & 0x80) ? (sccb->fac42 & 31) : 0;
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sclp.mtid_cp = (sccb->fac42 & 0x80) ? (sccb->fac43 & 31) : 0;
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sclp.mtid_prev = (sccb->fac42 & 0x80) ? (sccb->fac66 & 31) : 0;
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sclp.hmfai = sccb->hmfai;
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}
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/*
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