| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * hosting IBM Z kernel virtual machines (s390x) |
| * |
| * Copyright IBM Corp. 2008, 2020 |
| * |
| * Author(s): Carsten Otte <cotte@de.ibm.com> |
| * Christian Borntraeger <borntraeger@de.ibm.com> |
| * Christian Ehrhardt <ehrhardt@de.ibm.com> |
| * Jason J. Herne <jjherne@us.ibm.com> |
| */ |
| |
| #define KMSG_COMPONENT "kvm-s390" |
| #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| |
| #include <linux/compiler.h> |
| #include <linux/err.h> |
| #include <linux/fs.h> |
| #include <linux/hrtimer.h> |
| #include <linux/init.h> |
| #include <linux/kvm.h> |
| #include <linux/kvm_host.h> |
| #include <linux/mman.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/random.h> |
| #include <linux/slab.h> |
| #include <linux/timer.h> |
| #include <linux/vmalloc.h> |
| #include <linux/bitmap.h> |
| #include <linux/sched/signal.h> |
| #include <linux/string.h> |
| #include <linux/pgtable.h> |
| #include <linux/mmu_notifier.h> |
| |
| #include <asm/asm-offsets.h> |
| #include <asm/lowcore.h> |
| #include <asm/stp.h> |
| #include <asm/gmap.h> |
| #include <asm/nmi.h> |
| #include <asm/switch_to.h> |
| #include <asm/isc.h> |
| #include <asm/sclp.h> |
| #include <asm/cpacf.h> |
| #include <asm/timex.h> |
| #include <asm/ap.h> |
| #include <asm/uv.h> |
| #include <asm/fpu/api.h> |
| #include "kvm-s390.h" |
| #include "gaccess.h" |
| #include "pci.h" |
| |
| #define CREATE_TRACE_POINTS |
| #include "trace.h" |
| #include "trace-s390.h" |
| |
| #define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */ |
| #define LOCAL_IRQS 32 |
| #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \ |
| (KVM_MAX_VCPUS + LOCAL_IRQS)) |
| |
| const struct _kvm_stats_desc kvm_vm_stats_desc[] = { |
| KVM_GENERIC_VM_STATS(), |
| STATS_DESC_COUNTER(VM, inject_io), |
| STATS_DESC_COUNTER(VM, inject_float_mchk), |
| STATS_DESC_COUNTER(VM, inject_pfault_done), |
| STATS_DESC_COUNTER(VM, inject_service_signal), |
| STATS_DESC_COUNTER(VM, inject_virtio), |
| STATS_DESC_COUNTER(VM, aen_forward) |
| }; |
| |
| const struct kvm_stats_header kvm_vm_stats_header = { |
| .name_size = KVM_STATS_NAME_SIZE, |
| .num_desc = ARRAY_SIZE(kvm_vm_stats_desc), |
| .id_offset = sizeof(struct kvm_stats_header), |
| .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE, |
| .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE + |
| sizeof(kvm_vm_stats_desc), |
| }; |
| |
| const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = { |
| KVM_GENERIC_VCPU_STATS(), |
| STATS_DESC_COUNTER(VCPU, exit_userspace), |
| STATS_DESC_COUNTER(VCPU, exit_null), |
| STATS_DESC_COUNTER(VCPU, exit_external_request), |
| STATS_DESC_COUNTER(VCPU, exit_io_request), |
| STATS_DESC_COUNTER(VCPU, exit_external_interrupt), |
| STATS_DESC_COUNTER(VCPU, exit_stop_request), |
| STATS_DESC_COUNTER(VCPU, exit_validity), |
| STATS_DESC_COUNTER(VCPU, exit_instruction), |
| STATS_DESC_COUNTER(VCPU, exit_pei), |
| STATS_DESC_COUNTER(VCPU, halt_no_poll_steal), |
| STATS_DESC_COUNTER(VCPU, instruction_lctl), |
| STATS_DESC_COUNTER(VCPU, instruction_lctlg), |
| STATS_DESC_COUNTER(VCPU, instruction_stctl), |
| STATS_DESC_COUNTER(VCPU, instruction_stctg), |
| STATS_DESC_COUNTER(VCPU, exit_program_interruption), |
| STATS_DESC_COUNTER(VCPU, exit_instr_and_program), |
| STATS_DESC_COUNTER(VCPU, exit_operation_exception), |
| STATS_DESC_COUNTER(VCPU, deliver_ckc), |
| STATS_DESC_COUNTER(VCPU, deliver_cputm), |
| STATS_DESC_COUNTER(VCPU, deliver_external_call), |
| STATS_DESC_COUNTER(VCPU, deliver_emergency_signal), |
| STATS_DESC_COUNTER(VCPU, deliver_service_signal), |
| STATS_DESC_COUNTER(VCPU, deliver_virtio), |
| STATS_DESC_COUNTER(VCPU, deliver_stop_signal), |
| STATS_DESC_COUNTER(VCPU, deliver_prefix_signal), |
| STATS_DESC_COUNTER(VCPU, deliver_restart_signal), |
| STATS_DESC_COUNTER(VCPU, deliver_program), |
| STATS_DESC_COUNTER(VCPU, deliver_io), |
| STATS_DESC_COUNTER(VCPU, deliver_machine_check), |
| STATS_DESC_COUNTER(VCPU, exit_wait_state), |
| STATS_DESC_COUNTER(VCPU, inject_ckc), |
| STATS_DESC_COUNTER(VCPU, inject_cputm), |
| STATS_DESC_COUNTER(VCPU, inject_external_call), |
| STATS_DESC_COUNTER(VCPU, inject_emergency_signal), |
| STATS_DESC_COUNTER(VCPU, inject_mchk), |
| STATS_DESC_COUNTER(VCPU, inject_pfault_init), |
| STATS_DESC_COUNTER(VCPU, inject_program), |
| STATS_DESC_COUNTER(VCPU, inject_restart), |
| STATS_DESC_COUNTER(VCPU, inject_set_prefix), |
| STATS_DESC_COUNTER(VCPU, inject_stop_signal), |
| STATS_DESC_COUNTER(VCPU, instruction_epsw), |
| STATS_DESC_COUNTER(VCPU, instruction_gs), |
| STATS_DESC_COUNTER(VCPU, instruction_io_other), |
| STATS_DESC_COUNTER(VCPU, instruction_lpsw), |
| STATS_DESC_COUNTER(VCPU, instruction_lpswe), |
| STATS_DESC_COUNTER(VCPU, instruction_pfmf), |
| STATS_DESC_COUNTER(VCPU, instruction_ptff), |
| STATS_DESC_COUNTER(VCPU, instruction_sck), |
| STATS_DESC_COUNTER(VCPU, instruction_sckpf), |
| STATS_DESC_COUNTER(VCPU, instruction_stidp), |
| STATS_DESC_COUNTER(VCPU, instruction_spx), |
| STATS_DESC_COUNTER(VCPU, instruction_stpx), |
| STATS_DESC_COUNTER(VCPU, instruction_stap), |
| STATS_DESC_COUNTER(VCPU, instruction_iske), |
| STATS_DESC_COUNTER(VCPU, instruction_ri), |
| STATS_DESC_COUNTER(VCPU, instruction_rrbe), |
| STATS_DESC_COUNTER(VCPU, instruction_sske), |
| STATS_DESC_COUNTER(VCPU, instruction_ipte_interlock), |
| STATS_DESC_COUNTER(VCPU, instruction_stsi), |
| STATS_DESC_COUNTER(VCPU, instruction_stfl), |
| STATS_DESC_COUNTER(VCPU, instruction_tb), |
| STATS_DESC_COUNTER(VCPU, instruction_tpi), |
| STATS_DESC_COUNTER(VCPU, instruction_tprot), |
| STATS_DESC_COUNTER(VCPU, instruction_tsch), |
| STATS_DESC_COUNTER(VCPU, instruction_sie), |
| STATS_DESC_COUNTER(VCPU, instruction_essa), |
| STATS_DESC_COUNTER(VCPU, instruction_sthyi), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_sense), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_sense_running), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_external_call), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_emergency), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_cond_emergency), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_start), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_stop), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_stop_store_status), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_store_status), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_store_adtl_status), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_arch), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_prefix), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_restart), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_init_cpu_reset), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_cpu_reset), |
| STATS_DESC_COUNTER(VCPU, instruction_sigp_unknown), |
| STATS_DESC_COUNTER(VCPU, instruction_diagnose_10), |
| STATS_DESC_COUNTER(VCPU, instruction_diagnose_44), |
| STATS_DESC_COUNTER(VCPU, instruction_diagnose_9c), |
| STATS_DESC_COUNTER(VCPU, diag_9c_ignored), |
| STATS_DESC_COUNTER(VCPU, diag_9c_forward), |
| STATS_DESC_COUNTER(VCPU, instruction_diagnose_258), |
| STATS_DESC_COUNTER(VCPU, instruction_diagnose_308), |
| STATS_DESC_COUNTER(VCPU, instruction_diagnose_500), |
| STATS_DESC_COUNTER(VCPU, instruction_diagnose_other), |
| STATS_DESC_COUNTER(VCPU, pfault_sync) |
| }; |
| |
| const struct kvm_stats_header kvm_vcpu_stats_header = { |
| .name_size = KVM_STATS_NAME_SIZE, |
| .num_desc = ARRAY_SIZE(kvm_vcpu_stats_desc), |
| .id_offset = sizeof(struct kvm_stats_header), |
| .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE, |
| .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE + |
| sizeof(kvm_vcpu_stats_desc), |
| }; |
| |
| /* allow nested virtualization in KVM (if enabled by user space) */ |
| static int nested; |
| module_param(nested, int, S_IRUGO); |
| MODULE_PARM_DESC(nested, "Nested virtualization support"); |
| |
| /* allow 1m huge page guest backing, if !nested */ |
| static int hpage; |
| module_param(hpage, int, 0444); |
| MODULE_PARM_DESC(hpage, "1m huge page backing support"); |
| |
| /* maximum percentage of steal time for polling. >100 is treated like 100 */ |
| static u8 halt_poll_max_steal = 10; |
| module_param(halt_poll_max_steal, byte, 0644); |
| MODULE_PARM_DESC(halt_poll_max_steal, "Maximum percentage of steal time to allow polling"); |
| |
| /* if set to true, the GISA will be initialized and used if available */ |
| static bool use_gisa = true; |
| module_param(use_gisa, bool, 0644); |
| MODULE_PARM_DESC(use_gisa, "Use the GISA if the host supports it."); |
| |
| /* maximum diag9c forwarding per second */ |
| unsigned int diag9c_forwarding_hz; |
| module_param(diag9c_forwarding_hz, uint, 0644); |
| MODULE_PARM_DESC(diag9c_forwarding_hz, "Maximum diag9c forwarding per second, 0 to turn off"); |
| |
| /* |
| * For now we handle at most 16 double words as this is what the s390 base |
| * kernel handles and stores in the prefix page. If we ever need to go beyond |
| * this, this requires changes to code, but the external uapi can stay. |
| */ |
| #define SIZE_INTERNAL 16 |
| |
| /* |
| * Base feature mask that defines default mask for facilities. Consists of the |
| * defines in FACILITIES_KVM and the non-hypervisor managed bits. |
| */ |
| static unsigned long kvm_s390_fac_base[SIZE_INTERNAL] = { FACILITIES_KVM }; |
| /* |
| * Extended feature mask. Consists of the defines in FACILITIES_KVM_CPUMODEL |
| * and defines the facilities that can be enabled via a cpu model. |
| */ |
| static unsigned long kvm_s390_fac_ext[SIZE_INTERNAL] = { FACILITIES_KVM_CPUMODEL }; |
| |
| static unsigned long kvm_s390_fac_size(void) |
| { |
| BUILD_BUG_ON(SIZE_INTERNAL > S390_ARCH_FAC_MASK_SIZE_U64); |
| BUILD_BUG_ON(SIZE_INTERNAL > S390_ARCH_FAC_LIST_SIZE_U64); |
| BUILD_BUG_ON(SIZE_INTERNAL * sizeof(unsigned long) > |
| sizeof(stfle_fac_list)); |
| |
| return SIZE_INTERNAL; |
| } |
| |
| /* available cpu features supported by kvm */ |
| static DECLARE_BITMAP(kvm_s390_available_cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS); |
| /* available subfunctions indicated via query / "test bit" */ |
| static struct kvm_s390_vm_cpu_subfunc kvm_s390_available_subfunc; |
| |
| static struct gmap_notifier gmap_notifier; |
| static struct gmap_notifier vsie_gmap_notifier; |
| debug_info_t *kvm_s390_dbf; |
| debug_info_t *kvm_s390_dbf_uv; |
| |
| /* Section: not file related */ |
| int kvm_arch_hardware_enable(void) |
| { |
| /* every s390 is virtualization enabled ;-) */ |
| return 0; |
| } |
| |
| int kvm_arch_check_processor_compat(void *opaque) |
| { |
| return 0; |
| } |
| |
| /* forward declarations */ |
| static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start, |
| unsigned long end); |
| static int sca_switch_to_extended(struct kvm *kvm); |
| |
| static void kvm_clock_sync_scb(struct kvm_s390_sie_block *scb, u64 delta) |
| { |
| u8 delta_idx = 0; |
| |
| /* |
| * The TOD jumps by delta, we have to compensate this by adding |
| * -delta to the epoch. |
| */ |
| delta = -delta; |
| |
| /* sign-extension - we're adding to signed values below */ |
| if ((s64)delta < 0) |
| delta_idx = -1; |
| |
| scb->epoch += delta; |
| if (scb->ecd & ECD_MEF) { |
| scb->epdx += delta_idx; |
| if (scb->epoch < delta) |
| scb->epdx += 1; |
| } |
| } |
| |
| /* |
| * This callback is executed during stop_machine(). All CPUs are therefore |
| * temporarily stopped. In order not to change guest behavior, we have to |
| * disable preemption whenever we touch the epoch of kvm and the VCPUs, |
| * so a CPU won't be stopped while calculating with the epoch. |
| */ |
| static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val, |
| void *v) |
| { |
| struct kvm *kvm; |
| struct kvm_vcpu *vcpu; |
| unsigned long i; |
| unsigned long long *delta = v; |
| |
| list_for_each_entry(kvm, &vm_list, vm_list) { |
| kvm_for_each_vcpu(i, vcpu, kvm) { |
| kvm_clock_sync_scb(vcpu->arch.sie_block, *delta); |
| if (i == 0) { |
| kvm->arch.epoch = vcpu->arch.sie_block->epoch; |
| kvm->arch.epdx = vcpu->arch.sie_block->epdx; |
| } |
| if (vcpu->arch.cputm_enabled) |
| vcpu->arch.cputm_start += *delta; |
| if (vcpu->arch.vsie_block) |
| kvm_clock_sync_scb(vcpu->arch.vsie_block, |
| *delta); |
| } |
| } |
| return NOTIFY_OK; |
| } |
| |
| static struct notifier_block kvm_clock_notifier = { |
| .notifier_call = kvm_clock_sync, |
| }; |
| |
| int kvm_arch_hardware_setup(void *opaque) |
| { |
| gmap_notifier.notifier_call = kvm_gmap_notifier; |
| gmap_register_pte_notifier(&gmap_notifier); |
| vsie_gmap_notifier.notifier_call = kvm_s390_vsie_gmap_notifier; |
| gmap_register_pte_notifier(&vsie_gmap_notifier); |
| atomic_notifier_chain_register(&s390_epoch_delta_notifier, |
| &kvm_clock_notifier); |
| return 0; |
| } |
| |
| void kvm_arch_hardware_unsetup(void) |
| { |
| gmap_unregister_pte_notifier(&gmap_notifier); |
| gmap_unregister_pte_notifier(&vsie_gmap_notifier); |
| atomic_notifier_chain_unregister(&s390_epoch_delta_notifier, |
| &kvm_clock_notifier); |
| } |
| |
| static void allow_cpu_feat(unsigned long nr) |
| { |
| set_bit_inv(nr, kvm_s390_available_cpu_feat); |
| } |
| |
| static inline int plo_test_bit(unsigned char nr) |
| { |
| unsigned long function = (unsigned long)nr | 0x100; |
| int cc; |
| |
| asm volatile( |
| " lgr 0,%[function]\n" |
| /* Parameter registers are ignored for "test bit" */ |
| " plo 0,0,0,0(0)\n" |
| " ipm %0\n" |
| " srl %0,28\n" |
| : "=d" (cc) |
| : [function] "d" (function) |
| : "cc", "0"); |
| return cc == 0; |
| } |
| |
| static __always_inline void __insn32_query(unsigned int opcode, u8 *query) |
| { |
| asm volatile( |
| " lghi 0,0\n" |
| " lgr 1,%[query]\n" |
| /* Parameter registers are ignored */ |
| " .insn rrf,%[opc] << 16,2,4,6,0\n" |
| : |
| : [query] "d" ((unsigned long)query), [opc] "i" (opcode) |
| : "cc", "memory", "0", "1"); |
| } |
| |
| #define INSN_SORTL 0xb938 |
| #define INSN_DFLTCC 0xb939 |
| |
| static void kvm_s390_cpu_feat_init(void) |
| { |
| int i; |
| |
| for (i = 0; i < 256; ++i) { |
| if (plo_test_bit(i)) |
| kvm_s390_available_subfunc.plo[i >> 3] |= 0x80 >> (i & 7); |
| } |
| |
| if (test_facility(28)) /* TOD-clock steering */ |
| ptff(kvm_s390_available_subfunc.ptff, |
| sizeof(kvm_s390_available_subfunc.ptff), |
| PTFF_QAF); |
| |
| if (test_facility(17)) { /* MSA */ |
| __cpacf_query(CPACF_KMAC, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.kmac); |
| __cpacf_query(CPACF_KMC, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.kmc); |
| __cpacf_query(CPACF_KM, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.km); |
| __cpacf_query(CPACF_KIMD, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.kimd); |
| __cpacf_query(CPACF_KLMD, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.klmd); |
| } |
| if (test_facility(76)) /* MSA3 */ |
| __cpacf_query(CPACF_PCKMO, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.pckmo); |
| if (test_facility(77)) { /* MSA4 */ |
| __cpacf_query(CPACF_KMCTR, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.kmctr); |
| __cpacf_query(CPACF_KMF, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.kmf); |
| __cpacf_query(CPACF_KMO, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.kmo); |
| __cpacf_query(CPACF_PCC, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.pcc); |
| } |
| if (test_facility(57)) /* MSA5 */ |
| __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 (test_facility(155)) /* MSA9 */ |
| __cpacf_query(CPACF_KDSA, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.kdsa); |
| |
| if (test_facility(150)) /* SORTL */ |
| __insn32_query(INSN_SORTL, kvm_s390_available_subfunc.sortl); |
| |
| if (test_facility(151)) /* DFLTCC */ |
| __insn32_query(INSN_DFLTCC, kvm_s390_available_subfunc.dfltcc); |
| |
| if (MACHINE_HAS_ESOP) |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP); |
| /* |
| * We need SIE support, ESOP (PROT_READ protection for gmap_shadow), |
| * 64bit SCAO (SCA passthrough) and IDTE (for gmap_shadow unshadowing). |
| */ |
| if (!sclp.has_sief2 || !MACHINE_HAS_ESOP || !sclp.has_64bscao || |
| !test_facility(3) || !nested) |
| return; |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2); |
| if (sclp.has_64bscao) |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO); |
| if (sclp.has_siif) |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF); |
| if (sclp.has_gpere) |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GPERE); |
| if (sclp.has_gsls) |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS); |
| if (sclp.has_ib) |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB); |
| if (sclp.has_cei) |
| 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 |
| * instead of the real storage key. |
| * |
| * KVM_S390_VM_CPU_FEAT_CMMA: Wrong shadow of PTE.I bits will make |
| * pages being detected as preserved although they are resident. |
| * |
| * KVM_S390_VM_CPU_FEAT_PFMFI: Wrong shadow of PTE.I bits will |
| * have the same effect as for KVM_S390_VM_CPU_FEAT_SKEY. |
| * |
| * For KVM_S390_VM_CPU_FEAT_SKEY, KVM_S390_VM_CPU_FEAT_CMMA and |
| * KVM_S390_VM_CPU_FEAT_PFMFI, all PTE.I and PGSTE bits have to be |
| * correctly shadowed. We can do that for the PGSTE but not for PTE.I. |
| * |
| * KVM_S390_VM_CPU_FEAT_SIGPIF: Wrong SCB addresses in the SCA. We |
| * cannot easily shadow the SCA because of the ipte lock. |
| */ |
| } |
| |
| int kvm_arch_init(void *opaque) |
| { |
| int rc = -ENOMEM; |
| |
| kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long)); |
| if (!kvm_s390_dbf) |
| return -ENOMEM; |
| |
| kvm_s390_dbf_uv = debug_register("kvm-uv", 32, 1, 7 * sizeof(long)); |
| if (!kvm_s390_dbf_uv) |
| goto out; |
| |
| if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view) || |
| debug_register_view(kvm_s390_dbf_uv, &debug_sprintf_view)) |
| goto out; |
| |
| kvm_s390_cpu_feat_init(); |
| |
| /* Register floating interrupt controller interface. */ |
| rc = kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); |
| if (rc) { |
| pr_err("A FLIC registration call failed with rc=%d\n", rc); |
| goto out; |
| } |
| |
| if (IS_ENABLED(CONFIG_VFIO_PCI_ZDEV_KVM)) { |
| rc = kvm_s390_pci_init(); |
| if (rc) { |
| pr_err("Unable to allocate AIFT for PCI\n"); |
| goto out; |
| } |
| } |
| |
| rc = kvm_s390_gib_init(GAL_ISC); |
| if (rc) |
| goto out; |
| |
| return 0; |
| |
| out: |
| kvm_arch_exit(); |
| return rc; |
| } |
| |
| void kvm_arch_exit(void) |
| { |
| kvm_s390_gib_destroy(); |
| if (IS_ENABLED(CONFIG_VFIO_PCI_ZDEV_KVM)) |
| kvm_s390_pci_exit(); |
| debug_unregister(kvm_s390_dbf); |
| debug_unregister(kvm_s390_dbf_uv); |
| } |
| |
| /* Section: device related */ |
| long kvm_arch_dev_ioctl(struct file *filp, |
| unsigned int ioctl, unsigned long arg) |
| { |
| if (ioctl == KVM_S390_ENABLE_SIE) |
| return s390_enable_sie(); |
| return -EINVAL; |
| } |
| |
| int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
| { |
| int r; |
| |
| switch (ext) { |
| case KVM_CAP_S390_PSW: |
| case KVM_CAP_S390_GMAP: |
| case KVM_CAP_SYNC_MMU: |
| #ifdef CONFIG_KVM_S390_UCONTROL |
| case KVM_CAP_S390_UCONTROL: |
| #endif |
| case KVM_CAP_ASYNC_PF: |
| case KVM_CAP_SYNC_REGS: |
| case KVM_CAP_ONE_REG: |
| case KVM_CAP_ENABLE_CAP: |
| case KVM_CAP_S390_CSS_SUPPORT: |
| case KVM_CAP_IOEVENTFD: |
| case KVM_CAP_DEVICE_CTRL: |
| case KVM_CAP_S390_IRQCHIP: |
| case KVM_CAP_VM_ATTRIBUTES: |
| case KVM_CAP_MP_STATE: |
| case KVM_CAP_IMMEDIATE_EXIT: |
| case KVM_CAP_S390_INJECT_IRQ: |
| case KVM_CAP_S390_USER_SIGP: |
| case KVM_CAP_S390_USER_STSI: |
| case KVM_CAP_S390_SKEYS: |
| case KVM_CAP_S390_IRQ_STATE: |
| case KVM_CAP_S390_USER_INSTR0: |
| case KVM_CAP_S390_CMMA_MIGRATION: |
| case KVM_CAP_S390_AIS: |
| case KVM_CAP_S390_AIS_MIGRATION: |
| case KVM_CAP_S390_VCPU_RESETS: |
| case KVM_CAP_SET_GUEST_DEBUG: |
| case KVM_CAP_S390_DIAG318: |
| case KVM_CAP_S390_MEM_OP_EXTENSION: |
| r = 1; |
| break; |
| case KVM_CAP_SET_GUEST_DEBUG2: |
| r = KVM_GUESTDBG_VALID_MASK; |
| break; |
| case KVM_CAP_S390_HPAGE_1M: |
| r = 0; |
| if (hpage && !kvm_is_ucontrol(kvm)) |
| r = 1; |
| break; |
| case KVM_CAP_S390_MEM_OP: |
| r = MEM_OP_MAX_SIZE; |
| break; |
| case KVM_CAP_NR_VCPUS: |
| case KVM_CAP_MAX_VCPUS: |
| case KVM_CAP_MAX_VCPU_ID: |
| r = KVM_S390_BSCA_CPU_SLOTS; |
| if (!kvm_s390_use_sca_entries()) |
| r = KVM_MAX_VCPUS; |
| else if (sclp.has_esca && sclp.has_64bscao) |
| r = KVM_S390_ESCA_CPU_SLOTS; |
| if (ext == KVM_CAP_NR_VCPUS) |
| r = min_t(unsigned int, num_online_cpus(), r); |
| break; |
| case KVM_CAP_S390_COW: |
| r = MACHINE_HAS_ESOP; |
| break; |
| case KVM_CAP_S390_VECTOR_REGISTERS: |
| r = MACHINE_HAS_VX; |
| break; |
| case KVM_CAP_S390_RI: |
| r = test_facility(64); |
| break; |
| case KVM_CAP_S390_GS: |
| r = test_facility(133); |
| break; |
| case KVM_CAP_S390_BPB: |
| r = test_facility(82); |
| break; |
| case KVM_CAP_S390_PROTECTED: |
| r = is_prot_virt_host(); |
| break; |
| case KVM_CAP_S390_PROTECTED_DUMP: { |
| u64 pv_cmds_dump[] = { |
| BIT_UVC_CMD_DUMP_INIT, |
| BIT_UVC_CMD_DUMP_CONFIG_STOR_STATE, |
| BIT_UVC_CMD_DUMP_CPU, |
| BIT_UVC_CMD_DUMP_COMPLETE, |
| }; |
| int i; |
| |
| r = is_prot_virt_host(); |
| |
| for (i = 0; i < ARRAY_SIZE(pv_cmds_dump); i++) { |
| if (!test_bit_inv(pv_cmds_dump[i], |
| (unsigned long *)&uv_info.inst_calls_list)) { |
| r = 0; |
| break; |
| } |
| } |
| break; |
| } |
| case KVM_CAP_S390_ZPCI_OP: |
| r = kvm_s390_pci_interp_allowed(); |
| break; |
| case KVM_CAP_S390_CPU_TOPOLOGY: |
| r = test_facility(11); |
| break; |
| default: |
| r = 0; |
| } |
| return r; |
| } |
| |
| void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot) |
| { |
| int i; |
| gfn_t cur_gfn, last_gfn; |
| unsigned long gaddr, vmaddr; |
| struct gmap *gmap = kvm->arch.gmap; |
| DECLARE_BITMAP(bitmap, _PAGE_ENTRIES); |
| |
| /* Loop over all guest segments */ |
| cur_gfn = memslot->base_gfn; |
| last_gfn = memslot->base_gfn + memslot->npages; |
| for (; cur_gfn <= last_gfn; cur_gfn += _PAGE_ENTRIES) { |
| gaddr = gfn_to_gpa(cur_gfn); |
| vmaddr = gfn_to_hva_memslot(memslot, cur_gfn); |
| if (kvm_is_error_hva(vmaddr)) |
| continue; |
| |
| bitmap_zero(bitmap, _PAGE_ENTRIES); |
| gmap_sync_dirty_log_pmd(gmap, bitmap, gaddr, vmaddr); |
| for (i = 0; i < _PAGE_ENTRIES; i++) { |
| if (test_bit(i, bitmap)) |
| mark_page_dirty(kvm, cur_gfn + i); |
| } |
| |
| if (fatal_signal_pending(current)) |
| return; |
| cond_resched(); |
| } |
| } |
| |
| /* Section: vm related */ |
| static void sca_del_vcpu(struct kvm_vcpu *vcpu); |
| |
| /* |
| * Get (and clear) the dirty memory log for a memory slot. |
| */ |
| int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
| struct kvm_dirty_log *log) |
| { |
| int r; |
| unsigned long n; |
| struct kvm_memory_slot *memslot; |
| int is_dirty; |
| |
| if (kvm_is_ucontrol(kvm)) |
| return -EINVAL; |
| |
| mutex_lock(&kvm->slots_lock); |
| |
| r = -EINVAL; |
| if (log->slot >= KVM_USER_MEM_SLOTS) |
| goto out; |
| |
| r = kvm_get_dirty_log(kvm, log, &is_dirty, &memslot); |
| if (r) |
| goto out; |
| |
| /* Clear the dirty log */ |
| if (is_dirty) { |
| n = kvm_dirty_bitmap_bytes(memslot); |
| memset(memslot->dirty_bitmap, 0, n); |
| } |
| r = 0; |
| out: |
| mutex_unlock(&kvm->slots_lock); |
| return r; |
| } |
| |
| static void icpt_operexc_on_all_vcpus(struct kvm *kvm) |
| { |
| unsigned long i; |
| struct kvm_vcpu *vcpu; |
| |
| kvm_for_each_vcpu(i, vcpu, kvm) { |
| kvm_s390_sync_request(KVM_REQ_ICPT_OPEREXC, vcpu); |
| } |
| } |
| |
| int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
| { |
| int r; |
| |
| if (cap->flags) |
| return -EINVAL; |
| |
| switch (cap->cap) { |
| case KVM_CAP_S390_IRQCHIP: |
| VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP"); |
| kvm->arch.use_irqchip = 1; |
| r = 0; |
| break; |
| case KVM_CAP_S390_USER_SIGP: |
| VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP"); |
| kvm->arch.user_sigp = 1; |
| r = 0; |
| break; |
| case KVM_CAP_S390_VECTOR_REGISTERS: |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) { |
| r = -EBUSY; |
| } else if (MACHINE_HAS_VX) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 129); |
| set_kvm_facility(kvm->arch.model.fac_list, 129); |
| if (test_facility(134)) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 134); |
| set_kvm_facility(kvm->arch.model.fac_list, 134); |
| } |
| if (test_facility(135)) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 135); |
| set_kvm_facility(kvm->arch.model.fac_list, 135); |
| } |
| if (test_facility(148)) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 148); |
| set_kvm_facility(kvm->arch.model.fac_list, 148); |
| } |
| if (test_facility(152)) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 152); |
| set_kvm_facility(kvm->arch.model.fac_list, 152); |
| } |
| if (test_facility(192)) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 192); |
| set_kvm_facility(kvm->arch.model.fac_list, 192); |
| } |
| r = 0; |
| } else |
| r = -EINVAL; |
| mutex_unlock(&kvm->lock); |
| VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s", |
| r ? "(not available)" : "(success)"); |
| break; |
| case KVM_CAP_S390_RI: |
| r = -EINVAL; |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) { |
| r = -EBUSY; |
| } else if (test_facility(64)) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 64); |
| set_kvm_facility(kvm->arch.model.fac_list, 64); |
| r = 0; |
| } |
| mutex_unlock(&kvm->lock); |
| 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); |
| 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 (kvm->created_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_HPAGE_1M: |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) |
| r = -EBUSY; |
| else if (!hpage || kvm->arch.use_cmma || kvm_is_ucontrol(kvm)) |
| r = -EINVAL; |
| else { |
| r = 0; |
| mmap_write_lock(kvm->mm); |
| kvm->mm->context.allow_gmap_hpage_1m = 1; |
| mmap_write_unlock(kvm->mm); |
| /* |
| * We might have to create fake 4k page |
| * tables. To avoid that the hardware works on |
| * stale PGSTEs, we emulate these instructions. |
| */ |
| kvm->arch.use_skf = 0; |
| kvm->arch.use_pfmfi = 0; |
| } |
| mutex_unlock(&kvm->lock); |
| VM_EVENT(kvm, 3, "ENABLE: CAP_S390_HPAGE %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; |
| r = 0; |
| break; |
| case KVM_CAP_S390_USER_INSTR0: |
| VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_INSTR0"); |
| kvm->arch.user_instr0 = 1; |
| icpt_operexc_on_all_vcpus(kvm); |
| r = 0; |
| break; |
| case KVM_CAP_S390_CPU_TOPOLOGY: |
| r = -EINVAL; |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) { |
| r = -EBUSY; |
| } else if (test_facility(11)) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 11); |
| set_kvm_facility(kvm->arch.model.fac_list, 11); |
| r = 0; |
| } |
| mutex_unlock(&kvm->lock); |
| VM_EVENT(kvm, 3, "ENABLE: CAP_S390_CPU_TOPOLOGY %s", |
| r ? "(not available)" : "(success)"); |
| break; |
| default: |
| r = -EINVAL; |
| break; |
| } |
| return r; |
| } |
| |
| static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret; |
| |
| switch (attr->attr) { |
| case KVM_S390_VM_MEM_LIMIT_SIZE: |
| ret = 0; |
| VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes", |
| kvm->arch.mem_limit); |
| if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr)) |
| ret = -EFAULT; |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| return ret; |
| } |
| |
| static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret; |
| unsigned int idx; |
| switch (attr->attr) { |
| case KVM_S390_VM_MEM_ENABLE_CMMA: |
| ret = -ENXIO; |
| if (!sclp.has_cmma) |
| break; |
| |
| VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support"); |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) |
| ret = -EBUSY; |
| else if (kvm->mm->context.allow_gmap_hpage_1m) |
| ret = -EINVAL; |
| else { |
| kvm->arch.use_cmma = 1; |
| /* Not compatible with cmma. */ |
| kvm->arch.use_pfmfi = 0; |
| ret = 0; |
| } |
| mutex_unlock(&kvm->lock); |
| break; |
| case KVM_S390_VM_MEM_CLR_CMMA: |
| ret = -ENXIO; |
| if (!sclp.has_cmma) |
| break; |
| ret = -EINVAL; |
| if (!kvm->arch.use_cmma) |
| break; |
| |
| VM_EVENT(kvm, 3, "%s", "RESET: CMMA states"); |
| mutex_lock(&kvm->lock); |
| idx = srcu_read_lock(&kvm->srcu); |
| s390_reset_cmma(kvm->arch.gmap->mm); |
| srcu_read_unlock(&kvm->srcu, idx); |
| mutex_unlock(&kvm->lock); |
| ret = 0; |
| break; |
| case KVM_S390_VM_MEM_LIMIT_SIZE: { |
| unsigned long new_limit; |
| |
| if (kvm_is_ucontrol(kvm)) |
| return -EINVAL; |
| |
| if (get_user(new_limit, (u64 __user *)attr->addr)) |
| return -EFAULT; |
| |
| if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT && |
| new_limit > kvm->arch.mem_limit) |
| return -E2BIG; |
| |
| if (!new_limit) |
| return -EINVAL; |
| |
| /* gmap_create takes last usable address */ |
| if (new_limit != KVM_S390_NO_MEM_LIMIT) |
| new_limit -= 1; |
| |
| ret = -EBUSY; |
| mutex_lock(&kvm->lock); |
| if (!kvm->created_vcpus) { |
| /* gmap_create will round the limit up */ |
| struct gmap *new = gmap_create(current->mm, new_limit); |
| |
| if (!new) { |
| ret = -ENOMEM; |
| } else { |
| gmap_remove(kvm->arch.gmap); |
| new->private = kvm; |
| kvm->arch.gmap = new; |
| ret = 0; |
| } |
| } |
| mutex_unlock(&kvm->lock); |
| VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit); |
| VM_EVENT(kvm, 3, "New guest asce: 0x%pK", |
| (void *) kvm->arch.gmap->asce); |
| break; |
| } |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| return ret; |
| } |
| |
| static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu); |
| |
| void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm) |
| { |
| struct kvm_vcpu *vcpu; |
| unsigned long i; |
| |
| kvm_s390_vcpu_block_all(kvm); |
| |
| kvm_for_each_vcpu(i, vcpu, kvm) { |
| kvm_s390_vcpu_crypto_setup(vcpu); |
| /* recreate the shadow crycb by leaving the VSIE handler */ |
| kvm_s390_sync_request(KVM_REQ_VSIE_RESTART, vcpu); |
| } |
| |
| kvm_s390_vcpu_unblock_all(kvm); |
| } |
| |
| static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| mutex_lock(&kvm->lock); |
| switch (attr->attr) { |
| case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: |
| if (!test_kvm_facility(kvm, 76)) { |
| mutex_unlock(&kvm->lock); |
| return -EINVAL; |
| } |
| get_random_bytes( |
| kvm->arch.crypto.crycb->aes_wrapping_key_mask, |
| sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); |
| kvm->arch.crypto.aes_kw = 1; |
| VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support"); |
| break; |
| case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: |
| if (!test_kvm_facility(kvm, 76)) { |
| mutex_unlock(&kvm->lock); |
| return -EINVAL; |
| } |
| get_random_bytes( |
| kvm->arch.crypto.crycb->dea_wrapping_key_mask, |
| sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); |
| kvm->arch.crypto.dea_kw = 1; |
| VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support"); |
| break; |
| case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: |
| if (!test_kvm_facility(kvm, 76)) { |
| mutex_unlock(&kvm->lock); |
| return -EINVAL; |
| } |
| kvm->arch.crypto.aes_kw = 0; |
| memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0, |
| sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); |
| VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support"); |
| break; |
| case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: |
| if (!test_kvm_facility(kvm, 76)) { |
| mutex_unlock(&kvm->lock); |
| return -EINVAL; |
| } |
| kvm->arch.crypto.dea_kw = 0; |
| memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0, |
| sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); |
| VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support"); |
| break; |
| case KVM_S390_VM_CRYPTO_ENABLE_APIE: |
| if (!ap_instructions_available()) { |
| mutex_unlock(&kvm->lock); |
| return -EOPNOTSUPP; |
| } |
| kvm->arch.crypto.apie = 1; |
| break; |
| case KVM_S390_VM_CRYPTO_DISABLE_APIE: |
| if (!ap_instructions_available()) { |
| mutex_unlock(&kvm->lock); |
| return -EOPNOTSUPP; |
| } |
| kvm->arch.crypto.apie = 0; |
| break; |
| default: |
| mutex_unlock(&kvm->lock); |
| return -ENXIO; |
| } |
| |
| kvm_s390_vcpu_crypto_reset_all(kvm); |
| mutex_unlock(&kvm->lock); |
| return 0; |
| } |
| |
| static void kvm_s390_vcpu_pci_setup(struct kvm_vcpu *vcpu) |
| { |
| /* Only set the ECB bits after guest requests zPCI interpretation */ |
| if (!vcpu->kvm->arch.use_zpci_interp) |
| return; |
| |
| vcpu->arch.sie_block->ecb2 |= ECB2_ZPCI_LSI; |
| vcpu->arch.sie_block->ecb3 |= ECB3_AISII + ECB3_AISI; |
| } |
| |
| void kvm_s390_vcpu_pci_enable_interp(struct kvm *kvm) |
| { |
| struct kvm_vcpu *vcpu; |
| unsigned long i; |
| |
| lockdep_assert_held(&kvm->lock); |
| |
| if (!kvm_s390_pci_interp_allowed()) |
| return; |
| |
| /* |
| * If host is configured for PCI and the necessary facilities are |
| * available, turn on interpretation for the life of this guest |
| */ |
| kvm->arch.use_zpci_interp = 1; |
| |
| kvm_s390_vcpu_block_all(kvm); |
| |
| kvm_for_each_vcpu(i, vcpu, kvm) { |
| kvm_s390_vcpu_pci_setup(vcpu); |
| kvm_s390_sync_request(KVM_REQ_VSIE_RESTART, vcpu); |
| } |
| |
| kvm_s390_vcpu_unblock_all(kvm); |
| } |
| |
| static void kvm_s390_sync_request_broadcast(struct kvm *kvm, int req) |
| { |
| unsigned long cx; |
| struct kvm_vcpu *vcpu; |
| |
| kvm_for_each_vcpu(cx, vcpu, kvm) |
| kvm_s390_sync_request(req, vcpu); |
| } |
| |
| /* |
| * Must be called with kvm->srcu held to avoid races on memslots, and with |
| * kvm->slots_lock to avoid races with ourselves and kvm_s390_vm_stop_migration. |
| */ |
| static int kvm_s390_vm_start_migration(struct kvm *kvm) |
| { |
| struct kvm_memory_slot *ms; |
| struct kvm_memslots *slots; |
| unsigned long ram_pages = 0; |
| int bkt; |
| |
| /* migration mode already enabled */ |
| if (kvm->arch.migration_mode) |
| return 0; |
| slots = kvm_memslots(kvm); |
| if (!slots || kvm_memslots_empty(slots)) |
| return -EINVAL; |
| |
| if (!kvm->arch.use_cmma) { |
| kvm->arch.migration_mode = 1; |
| return 0; |
| } |
| /* mark all the pages in active slots as dirty */ |
| kvm_for_each_memslot(ms, bkt, slots) { |
| if (!ms->dirty_bitmap) |
| return -EINVAL; |
| /* |
| * The second half of the bitmap is only used on x86, |
| * and would be wasted otherwise, so we put it to good |
| * use here to keep track of the state of the storage |
| * attributes. |
| */ |
| memset(kvm_second_dirty_bitmap(ms), 0xff, kvm_dirty_bitmap_bytes(ms)); |
| ram_pages += ms->npages; |
| } |
| atomic64_set(&kvm->arch.cmma_dirty_pages, ram_pages); |
| kvm->arch.migration_mode = 1; |
| kvm_s390_sync_request_broadcast(kvm, KVM_REQ_START_MIGRATION); |
| return 0; |
| } |
| |
| /* |
| * Must be called with kvm->slots_lock to avoid races with ourselves and |
| * kvm_s390_vm_start_migration. |
| */ |
| static int kvm_s390_vm_stop_migration(struct kvm *kvm) |
| { |
| /* migration mode already disabled */ |
| if (!kvm->arch.migration_mode) |
| return 0; |
| kvm->arch.migration_mode = 0; |
| if (kvm->arch.use_cmma) |
| kvm_s390_sync_request_broadcast(kvm, KVM_REQ_STOP_MIGRATION); |
| return 0; |
| } |
| |
| static int kvm_s390_vm_set_migration(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| int res = -ENXIO; |
| |
| mutex_lock(&kvm->slots_lock); |
| switch (attr->attr) { |
| case KVM_S390_VM_MIGRATION_START: |
| res = kvm_s390_vm_start_migration(kvm); |
| break; |
| case KVM_S390_VM_MIGRATION_STOP: |
| res = kvm_s390_vm_stop_migration(kvm); |
| break; |
| default: |
| break; |
| } |
| mutex_unlock(&kvm->slots_lock); |
| |
| return res; |
| } |
| |
| static int kvm_s390_vm_get_migration(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| u64 mig = kvm->arch.migration_mode; |
| |
| if (attr->attr != KVM_S390_VM_MIGRATION_STATUS) |
| return -ENXIO; |
| |
| if (copy_to_user((void __user *)attr->addr, &mig, sizeof(mig))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static void __kvm_s390_set_tod_clock(struct kvm *kvm, const struct kvm_s390_vm_tod_clock *gtod); |
| |
| static int kvm_s390_set_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_tod_clock gtod; |
| |
| if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod))) |
| return -EFAULT; |
| |
| if (!test_kvm_facility(kvm, 139) && gtod.epoch_idx) |
| return -EINVAL; |
| __kvm_s390_set_tod_clock(kvm, >od); |
| |
| VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x, TOD base: 0x%llx", |
| gtod.epoch_idx, gtod.tod); |
| |
| return 0; |
| } |
| |
| static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| u8 gtod_high; |
| |
| if (copy_from_user(>od_high, (void __user *)attr->addr, |
| sizeof(gtod_high))) |
| return -EFAULT; |
| |
| if (gtod_high != 0) |
| return -EINVAL; |
| VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high); |
| |
| return 0; |
| } |
| |
| static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_tod_clock gtod = { 0 }; |
| |
| if (copy_from_user(>od.tod, (void __user *)attr->addr, |
| sizeof(gtod.tod))) |
| return -EFAULT; |
| |
| __kvm_s390_set_tod_clock(kvm, >od); |
| VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod.tod); |
| return 0; |
| } |
| |
| static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret; |
| |
| if (attr->flags) |
| return -EINVAL; |
| |
| mutex_lock(&kvm->lock); |
| /* |
| * For protected guests, the TOD is managed by the ultravisor, so trying |
| * to change it will never bring the expected results. |
| */ |
| if (kvm_s390_pv_is_protected(kvm)) { |
| ret = -EOPNOTSUPP; |
| goto out_unlock; |
| } |
| |
| switch (attr->attr) { |
| case KVM_S390_VM_TOD_EXT: |
| ret = kvm_s390_set_tod_ext(kvm, attr); |
| break; |
| case KVM_S390_VM_TOD_HIGH: |
| ret = kvm_s390_set_tod_high(kvm, attr); |
| break; |
| case KVM_S390_VM_TOD_LOW: |
| ret = kvm_s390_set_tod_low(kvm, attr); |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| |
| out_unlock: |
| mutex_unlock(&kvm->lock); |
| return ret; |
| } |
| |
| static void kvm_s390_get_tod_clock(struct kvm *kvm, |
| struct kvm_s390_vm_tod_clock *gtod) |
| { |
| union tod_clock clk; |
| |
| preempt_disable(); |
| |
| store_tod_clock_ext(&clk); |
| |
| gtod->tod = clk.tod + kvm->arch.epoch; |
| gtod->epoch_idx = 0; |
| if (test_kvm_facility(kvm, 139)) { |
| gtod->epoch_idx = clk.ei + kvm->arch.epdx; |
| if (gtod->tod < clk.tod) |
| gtod->epoch_idx += 1; |
| } |
| |
| preempt_enable(); |
| } |
| |
| static int kvm_s390_get_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_tod_clock gtod; |
| |
| memset(>od, 0, sizeof(gtod)); |
| kvm_s390_get_tod_clock(kvm, >od); |
| if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod))) |
| return -EFAULT; |
| |
| VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x, TOD base: 0x%llx", |
| gtod.epoch_idx, gtod.tod); |
| return 0; |
| } |
| |
| static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| u8 gtod_high = 0; |
| |
| if (copy_to_user((void __user *)attr->addr, >od_high, |
| sizeof(gtod_high))) |
| return -EFAULT; |
| VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high); |
| |
| return 0; |
| } |
| |
| static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| u64 gtod; |
| |
| gtod = kvm_s390_get_tod_clock_fast(kvm); |
| if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod))) |
| return -EFAULT; |
| VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod); |
| |
| return 0; |
| } |
| |
| static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret; |
| |
| if (attr->flags) |
| return -EINVAL; |
| |
| switch (attr->attr) { |
| case KVM_S390_VM_TOD_EXT: |
| ret = kvm_s390_get_tod_ext(kvm, attr); |
| break; |
| case KVM_S390_VM_TOD_HIGH: |
| ret = kvm_s390_get_tod_high(kvm, attr); |
| break; |
| case KVM_S390_VM_TOD_LOW: |
| ret = kvm_s390_get_tod_low(kvm, attr); |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| return ret; |
| } |
| |
| static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_cpu_processor *proc; |
| u16 lowest_ibc, unblocked_ibc; |
| int ret = 0; |
| |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) { |
| ret = -EBUSY; |
| goto out; |
| } |
| proc = kzalloc(sizeof(*proc), GFP_KERNEL_ACCOUNT); |
| if (!proc) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| if (!copy_from_user(proc, (void __user *)attr->addr, |
| sizeof(*proc))) { |
| kvm->arch.model.cpuid = proc->cpuid; |
| lowest_ibc = sclp.ibc >> 16 & 0xfff; |
| unblocked_ibc = sclp.ibc & 0xfff; |
| if (lowest_ibc && proc->ibc) { |
| if (proc->ibc > unblocked_ibc) |
| kvm->arch.model.ibc = unblocked_ibc; |
| else if (proc->ibc < lowest_ibc) |
| kvm->arch.model.ibc = lowest_ibc; |
| else |
| kvm->arch.model.ibc = proc->ibc; |
| } |
| memcpy(kvm->arch.model.fac_list, proc->fac_list, |
| S390_ARCH_FAC_LIST_SIZE_BYTE); |
| VM_EVENT(kvm, 3, "SET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx", |
| kvm->arch.model.ibc, |
| kvm->arch.model.cpuid); |
| VM_EVENT(kvm, 3, "SET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx", |
| kvm->arch.model.fac_list[0], |
| kvm->arch.model.fac_list[1], |
| kvm->arch.model.fac_list[2]); |
| } else |
| ret = -EFAULT; |
| kfree(proc); |
| out: |
| mutex_unlock(&kvm->lock); |
| return ret; |
| } |
| |
| static int kvm_s390_set_processor_feat(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_cpu_feat data; |
| |
| if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data))) |
| return -EFAULT; |
| if (!bitmap_subset((unsigned long *) data.feat, |
| kvm_s390_available_cpu_feat, |
| KVM_S390_VM_CPU_FEAT_NR_BITS)) |
| return -EINVAL; |
| |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) { |
| mutex_unlock(&kvm->lock); |
| return -EBUSY; |
| } |
| bitmap_from_arr64(kvm->arch.cpu_feat, data.feat, KVM_S390_VM_CPU_FEAT_NR_BITS); |
| mutex_unlock(&kvm->lock); |
| VM_EVENT(kvm, 3, "SET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx", |
| data.feat[0], |
| data.feat[1], |
| data.feat[2]); |
| return 0; |
| } |
| |
| static int kvm_s390_set_processor_subfunc(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| 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]); |
| VM_EVENT(kvm, 3, "SET: guest KDSA subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[1]); |
| VM_EVENT(kvm, 3, "SET: guest SORTL subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[1], |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[2], |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[3]); |
| VM_EVENT(kvm, 3, "SET: guest DFLTCC subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[1], |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[2], |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[3]); |
| |
| return 0; |
| } |
| |
| static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret = -ENXIO; |
| |
| switch (attr->attr) { |
| case KVM_S390_VM_CPU_PROCESSOR: |
| ret = kvm_s390_set_processor(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
| ret = kvm_s390_set_processor_feat(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: |
| ret = kvm_s390_set_processor_subfunc(kvm, attr); |
| break; |
| } |
| return ret; |
| } |
| |
| static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_cpu_processor *proc; |
| int ret = 0; |
| |
| proc = kzalloc(sizeof(*proc), GFP_KERNEL_ACCOUNT); |
| if (!proc) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| proc->cpuid = kvm->arch.model.cpuid; |
| proc->ibc = kvm->arch.model.ibc; |
| memcpy(&proc->fac_list, kvm->arch.model.fac_list, |
| S390_ARCH_FAC_LIST_SIZE_BYTE); |
| VM_EVENT(kvm, 3, "GET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx", |
| kvm->arch.model.ibc, |
| kvm->arch.model.cpuid); |
| VM_EVENT(kvm, 3, "GET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx", |
| kvm->arch.model.fac_list[0], |
| kvm->arch.model.fac_list[1], |
| kvm->arch.model.fac_list[2]); |
| if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc))) |
| ret = -EFAULT; |
| kfree(proc); |
| out: |
| return ret; |
| } |
| |
| static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_cpu_machine *mach; |
| int ret = 0; |
| |
| mach = kzalloc(sizeof(*mach), GFP_KERNEL_ACCOUNT); |
| if (!mach) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| get_cpu_id((struct cpuid *) &mach->cpuid); |
| mach->ibc = sclp.ibc; |
| memcpy(&mach->fac_mask, kvm->arch.model.fac_mask, |
| S390_ARCH_FAC_LIST_SIZE_BYTE); |
| memcpy((unsigned long *)&mach->fac_list, stfle_fac_list, |
| sizeof(stfle_fac_list)); |
| VM_EVENT(kvm, 3, "GET: host ibc: 0x%4.4x, host cpuid: 0x%16.16llx", |
| kvm->arch.model.ibc, |
| kvm->arch.model.cpuid); |
| VM_EVENT(kvm, 3, "GET: host facmask: 0x%16.16llx.%16.16llx.%16.16llx", |
| mach->fac_mask[0], |
| mach->fac_mask[1], |
| mach->fac_mask[2]); |
| VM_EVENT(kvm, 3, "GET: host faclist: 0x%16.16llx.%16.16llx.%16.16llx", |
| mach->fac_list[0], |
| mach->fac_list[1], |
| mach->fac_list[2]); |
| if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach))) |
| ret = -EFAULT; |
| kfree(mach); |
| out: |
| return ret; |
| } |
| |
| static int kvm_s390_get_processor_feat(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_cpu_feat data; |
| |
| bitmap_to_arr64(data.feat, kvm->arch.cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS); |
| if (copy_to_user((void __user *)attr->addr, &data, sizeof(data))) |
| return -EFAULT; |
| VM_EVENT(kvm, 3, "GET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx", |
| data.feat[0], |
| data.feat[1], |
| data.feat[2]); |
| return 0; |
| } |
| |
| static int kvm_s390_get_machine_feat(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_cpu_feat data; |
| |
| bitmap_to_arr64(data.feat, kvm_s390_available_cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS); |
| if (copy_to_user((void __user *)attr->addr, &data, sizeof(data))) |
| return -EFAULT; |
| VM_EVENT(kvm, 3, "GET: host feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx", |
| data.feat[0], |
| data.feat[1], |
| data.feat[2]); |
| return 0; |
| } |
| |
| static int kvm_s390_get_processor_subfunc(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| 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]); |
| VM_EVENT(kvm, 3, "GET: guest KDSA subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[1]); |
| VM_EVENT(kvm, 3, "GET: guest SORTL subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[1], |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[2], |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[3]); |
| VM_EVENT(kvm, 3, "GET: guest DFLTCC subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[1], |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[2], |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[3]); |
| |
| return 0; |
| } |
| |
| static int kvm_s390_get_machine_subfunc(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| 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]); |
| VM_EVENT(kvm, 3, "GET: host KDSA subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.kdsa)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.kdsa)[1]); |
| VM_EVENT(kvm, 3, "GET: host SORTL subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.sortl)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.sortl)[1], |
| ((unsigned long *) &kvm_s390_available_subfunc.sortl)[2], |
| ((unsigned long *) &kvm_s390_available_subfunc.sortl)[3]); |
| VM_EVENT(kvm, 3, "GET: host DFLTCC subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[1], |
| ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[2], |
| ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[3]); |
| |
| return 0; |
| } |
| |
| static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret = -ENXIO; |
| |
| switch (attr->attr) { |
| case KVM_S390_VM_CPU_PROCESSOR: |
| ret = kvm_s390_get_processor(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_MACHINE: |
| ret = kvm_s390_get_machine(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
| ret = kvm_s390_get_processor_feat(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_MACHINE_FEAT: |
| ret = kvm_s390_get_machine_feat(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: |
| ret = kvm_s390_get_processor_subfunc(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_MACHINE_SUBFUNC: |
| ret = kvm_s390_get_machine_subfunc(kvm, attr); |
| break; |
| } |
| return ret; |
| } |
| |
| /** |
| * kvm_s390_update_topology_change_report - update CPU topology change report |
| * @kvm: guest KVM description |
| * @val: set or clear the MTCR bit |
| * |
| * Updates the Multiprocessor Topology-Change-Report bit to signal |
| * the guest with a topology change. |
| * This is only relevant if the topology facility is present. |
| * |
| * The SCA version, bsca or esca, doesn't matter as offset is the same. |
| */ |
| static void kvm_s390_update_topology_change_report(struct kvm *kvm, bool val) |
| { |
| union sca_utility new, old; |
| struct bsca_block *sca; |
| |
| read_lock(&kvm->arch.sca_lock); |
| sca = kvm->arch.sca; |
| do { |
| old = READ_ONCE(sca->utility); |
| new = old; |
| new.mtcr = val; |
| } while (cmpxchg(&sca->utility.val, old.val, new.val) != old.val); |
| read_unlock(&kvm->arch.sca_lock); |
| } |
| |
| static int kvm_s390_set_topo_change_indication(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| if (!test_kvm_facility(kvm, 11)) |
| return -ENXIO; |
| |
| kvm_s390_update_topology_change_report(kvm, !!attr->attr); |
| return 0; |
| } |
| |
| static int kvm_s390_get_topo_change_indication(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| u8 topo; |
| |
| if (!test_kvm_facility(kvm, 11)) |
| return -ENXIO; |
| |
| read_lock(&kvm->arch.sca_lock); |
| topo = ((struct bsca_block *)kvm->arch.sca)->utility.mtcr; |
| read_unlock(&kvm->arch.sca_lock); |
| |
| return put_user(topo, (u8 __user *)attr->addr); |
| } |
| |
| static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret; |
| |
| switch (attr->group) { |
| case KVM_S390_VM_MEM_CTRL: |
| ret = kvm_s390_set_mem_control(kvm, attr); |
| break; |
| case KVM_S390_VM_TOD: |
| ret = kvm_s390_set_tod(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_MODEL: |
| ret = kvm_s390_set_cpu_model(kvm, attr); |
| break; |
| case KVM_S390_VM_CRYPTO: |
| ret = kvm_s390_vm_set_crypto(kvm, attr); |
| break; |
| case KVM_S390_VM_MIGRATION: |
| ret = kvm_s390_vm_set_migration(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_TOPOLOGY: |
| ret = kvm_s390_set_topo_change_indication(kvm, attr); |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret; |
| |
| switch (attr->group) { |
| case KVM_S390_VM_MEM_CTRL: |
| ret = kvm_s390_get_mem_control(kvm, attr); |
| break; |
| case KVM_S390_VM_TOD: |
| ret = kvm_s390_get_tod(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_MODEL: |
| ret = kvm_s390_get_cpu_model(kvm, attr); |
| break; |
| case KVM_S390_VM_MIGRATION: |
| ret = kvm_s390_vm_get_migration(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_TOPOLOGY: |
| ret = kvm_s390_get_topo_change_indication(kvm, attr); |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret; |
| |
| switch (attr->group) { |
| case KVM_S390_VM_MEM_CTRL: |
| switch (attr->attr) { |
| case KVM_S390_VM_MEM_ENABLE_CMMA: |
| case KVM_S390_VM_MEM_CLR_CMMA: |
| ret = sclp.has_cmma ? 0 : -ENXIO; |
| break; |
| case KVM_S390_VM_MEM_LIMIT_SIZE: |
| ret = 0; |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| break; |
| case KVM_S390_VM_TOD: |
| switch (attr->attr) { |
| case KVM_S390_VM_TOD_LOW: |
| case KVM_S390_VM_TOD_HIGH: |
| ret = 0; |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| break; |
| case KVM_S390_VM_CPU_MODEL: |
| switch (attr->attr) { |
| case KVM_S390_VM_CPU_PROCESSOR: |
| case KVM_S390_VM_CPU_MACHINE: |
| 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; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| break; |
| case KVM_S390_VM_CRYPTO: |
| switch (attr->attr) { |
| case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: |
| case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: |
| case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: |
| case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: |
| ret = 0; |
| break; |
| case KVM_S390_VM_CRYPTO_ENABLE_APIE: |
| case KVM_S390_VM_CRYPTO_DISABLE_APIE: |
| ret = ap_instructions_available() ? 0 : -ENXIO; |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| break; |
| case KVM_S390_VM_MIGRATION: |
| ret = 0; |
| break; |
| case KVM_S390_VM_CPU_TOPOLOGY: |
| ret = test_kvm_facility(kvm, 11) ? 0 : -ENXIO; |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) |
| { |
| uint8_t *keys; |
| uint64_t hva; |
| int srcu_idx, i, r = 0; |
| |
| if (args->flags != 0) |
| return -EINVAL; |
| |
| /* Is this guest using storage keys? */ |
| if (!mm_uses_skeys(current->mm)) |
| return KVM_S390_GET_SKEYS_NONE; |
| |
| /* Enforce sane limit on memory allocation */ |
| if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) |
| return -EINVAL; |
| |
| keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL_ACCOUNT); |
| if (!keys) |
| return -ENOMEM; |
| |
| mmap_read_lock(current->mm); |
| srcu_idx = srcu_read_lock(&kvm->srcu); |
| for (i = 0; i < args->count; i++) { |
| hva = gfn_to_hva(kvm, args->start_gfn + i); |
| if (kvm_is_error_hva(hva)) { |
| r = -EFAULT; |
| break; |
| } |
| |
| r = get_guest_storage_key(current->mm, hva, &keys[i]); |
| if (r) |
| break; |
| } |
| srcu_read_unlock(&kvm->srcu, srcu_idx); |
| mmap_read_unlock(current->mm); |
| |
| if (!r) { |
| r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys, |
| sizeof(uint8_t) * args->count); |
| if (r) |
| r = -EFAULT; |
| } |
| |
| kvfree(keys); |
| return r; |
| } |
| |
| static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) |
| { |
| uint8_t *keys; |
| uint64_t hva; |
| int srcu_idx, i, r = 0; |
| bool unlocked; |
| |
| if (args->flags != 0) |
| return -EINVAL; |
| |
| /* Enforce sane limit on memory allocation */ |
| if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) |
| return -EINVAL; |
| |
| keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL_ACCOUNT); |
| if (!keys) |
| return -ENOMEM; |
| |
| r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr, |
| sizeof(uint8_t) * args->count); |
| if (r) { |
| r = -EFAULT; |
| goto out; |
| } |
| |
| /* Enable storage key handling for the guest */ |
| r = s390_enable_skey(); |
| if (r) |
| goto out; |
| |
| i = 0; |
| mmap_read_lock(current->mm); |
| srcu_idx = srcu_read_lock(&kvm->srcu); |
| while (i < args->count) { |
| unlocked = false; |
| hva = gfn_to_hva(kvm, args->start_gfn + i); |
| if (kvm_is_error_hva(hva)) { |
| r = -EFAULT; |
| break; |
| } |
| |
| /* Lowest order bit is reserved */ |
| if (keys[i] & 0x01) { |
| r = -EINVAL; |
| break; |
| } |
| |
| r = set_guest_storage_key(current->mm, hva, keys[i], 0); |
| if (r) { |
| r = fixup_user_fault(current->mm, hva, |
| FAULT_FLAG_WRITE, &unlocked); |
| if (r) |
| break; |
| } |
| if (!r) |
| i++; |
| } |
| srcu_read_unlock(&kvm->srcu, srcu_idx); |
| mmap_read_unlock(current->mm); |
| out: |
| kvfree(keys); |
| return r; |
| } |
| |
| /* |
| * Base address and length must be sent at the start of each block, therefore |
| * it's cheaper to send some clean data, as long as it's less than the size of |
| * two longs. |
| */ |
| #define KVM_S390_MAX_BIT_DISTANCE (2 * sizeof(void *)) |
| /* for consistency */ |
| #define KVM_S390_CMMA_SIZE_MAX ((u32)KVM_S390_SKEYS_MAX) |
| |
| static int kvm_s390_peek_cmma(struct kvm *kvm, struct kvm_s390_cmma_log *args, |
| u8 *res, unsigned long bufsize) |
| { |
| unsigned long pgstev, hva, cur_gfn = args->start_gfn; |
| |
| args->count = 0; |
| while (args->count < bufsize) { |
| hva = gfn_to_hva(kvm, cur_gfn); |
| /* |
| * We return an error if the first value was invalid, but we |
| * return successfully if at least one value was copied. |
| */ |
| if (kvm_is_error_hva(hva)) |
| return args->count ? 0 : -EFAULT; |
| if (get_pgste(kvm->mm, hva, &pgstev) < 0) |
| pgstev = 0; |
| res[args->count++] = (pgstev >> 24) & 0x43; |
| cur_gfn++; |
| } |
| |
| return 0; |
| } |
| |
| static struct kvm_memory_slot *gfn_to_memslot_approx(struct kvm_memslots *slots, |
| gfn_t gfn) |
| { |
| return ____gfn_to_memslot(slots, gfn, true); |
| } |
| |
| static unsigned long kvm_s390_next_dirty_cmma(struct kvm_memslots *slots, |
| unsigned long cur_gfn) |
| { |
| struct kvm_memory_slot *ms = gfn_to_memslot_approx(slots, cur_gfn); |
| unsigned long ofs = cur_gfn - ms->base_gfn; |
| struct rb_node *mnode = &ms->gfn_node[slots->node_idx]; |
| |
| if (ms->base_gfn + ms->npages <= cur_gfn) { |
| mnode = rb_next(mnode); |
| /* If we are above the highest slot, wrap around */ |
| if (!mnode) |
| mnode = rb_first(&slots->gfn_tree); |
| |
| ms = container_of(mnode, struct kvm_memory_slot, gfn_node[slots->node_idx]); |
| ofs = 0; |
| } |
| ofs = find_next_bit(kvm_second_dirty_bitmap(ms), ms->npages, ofs); |
| while (ofs >= ms->npages && (mnode = rb_next(mnode))) { |
| ms = container_of(mnode, struct kvm_memory_slot, gfn_node[slots->node_idx]); |
| ofs = find_first_bit(kvm_second_dirty_bitmap(ms), ms->npages); |
| } |
| return ms->base_gfn + ofs; |
| } |
| |
| static int kvm_s390_get_cmma(struct kvm *kvm, struct kvm_s390_cmma_log *args, |
| u8 *res, unsigned long bufsize) |
| { |
| unsigned long mem_end, cur_gfn, next_gfn, hva, pgstev; |
| struct kvm_memslots *slots = kvm_memslots(kvm); |
| struct kvm_memory_slot *ms; |
| |
| if (unlikely(kvm_memslots_empty(slots))) |
| return 0; |
| |
| cur_gfn = kvm_s390_next_dirty_cmma(slots, args->start_gfn); |
| ms = gfn_to_memslot(kvm, cur_gfn); |
| args->count = 0; |
| args->start_gfn = cur_gfn; |
| if (!ms) |
| return 0; |
| next_gfn = kvm_s390_next_dirty_cmma(slots, cur_gfn + 1); |
| mem_end = kvm_s390_get_gfn_end(slots); |
| |
| while (args->count < bufsize) { |
| hva = gfn_to_hva(kvm, cur_gfn); |
| if (kvm_is_error_hva(hva)) |
| return 0; |
| /* Decrement only if we actually flipped the bit to 0 */ |
| if (test_and_clear_bit(cur_gfn - ms->base_gfn, kvm_second_dirty_bitmap(ms))) |
| atomic64_dec(&kvm->arch.cmma_dirty_pages); |
| if (get_pgste(kvm->mm, hva, &pgstev) < 0) |
| pgstev = 0; |
| /* Save the value */ |
| res[args->count++] = (pgstev >> 24) & 0x43; |
| /* If the next bit is too far away, stop. */ |
| if (next_gfn > cur_gfn + KVM_S390_MAX_BIT_DISTANCE) |
| return 0; |
| /* If we reached the previous "next", find the next one */ |
| if (cur_gfn == next_gfn) |
| next_gfn = kvm_s390_next_dirty_cmma(slots, cur_gfn + 1); |
| /* Reached the end of memory or of the buffer, stop */ |
| if ((next_gfn >= mem_end) || |
| (next_gfn - args->start_gfn >= bufsize)) |
| return 0; |
| cur_gfn++; |
| /* Reached the end of the current memslot, take the next one. */ |
| if (cur_gfn - ms->base_gfn >= ms->npages) { |
| ms = gfn_to_memslot(kvm, cur_gfn); |
| if (!ms) |
| return 0; |
| } |
| } |
| return 0; |
| } |
| |
| /* |
| * This function searches for the next page with dirty CMMA attributes, and |
| * saves the attributes in the buffer up to either the end of the buffer or |
| * until a block of at least KVM_S390_MAX_BIT_DISTANCE clean bits is found; |
| * no trailing clean bytes are saved. |
| * In case no dirty bits were found, or if CMMA was not enabled or used, the |
| * output buffer will indicate 0 as length. |
| */ |
| static int kvm_s390_get_cmma_bits(struct kvm *kvm, |
| struct kvm_s390_cmma_log *args) |
| { |
| unsigned long bufsize; |
| int srcu_idx, peek, ret; |
| u8 *values; |
| |
| if (!kvm->arch.use_cmma) |
| return -ENXIO; |
| /* Invalid/unsupported flags were specified */ |
| if (args->flags & ~KVM_S390_CMMA_PEEK) |
| return -EINVAL; |
| /* Migration mode query, and we are not doing a migration */ |
| peek = !!(args->flags & KVM_S390_CMMA_PEEK); |
| if (!peek && !kvm->arch.migration_mode) |
| return -EINVAL; |
| /* CMMA is disabled or was not used, or the buffer has length zero */ |
| bufsize = min(args->count, KVM_S390_CMMA_SIZE_MAX); |
| if (!bufsize || !kvm->mm->context.uses_cmm) { |
| memset(args, 0, sizeof(*args)); |
| return 0; |
| } |
| /* We are not peeking, and there are no dirty pages */ |
| if (!peek && !atomic64_read(&kvm->arch.cmma_dirty_pages)) { |
| memset(args, 0, sizeof(*args)); |
| return 0; |
| } |
| |
| values = vmalloc(bufsize); |
| if (!values) |
| return -ENOMEM; |
| |
| mmap_read_lock(kvm->mm); |
| srcu_idx = srcu_read_lock(&kvm->srcu); |
| if (peek) |
| ret = kvm_s390_peek_cmma(kvm, args, values, bufsize); |
| else |
| ret = kvm_s390_get_cmma(kvm, args, values, bufsize); |
| srcu_read_unlock(&kvm->srcu, srcu_idx); |
| mmap_read_unlock(kvm->mm); |
| |
| if (kvm->arch.migration_mode) |
| args->remaining = atomic64_read(&kvm->arch.cmma_dirty_pages); |
| else |
| args->remaining = 0; |
| |
| if (copy_to_user((void __user *)args->values, values, args->count)) |
| ret = -EFAULT; |
| |
| vfree(values); |
| return ret; |
| } |
| |
| /* |
| * This function sets the CMMA attributes for the given pages. If the input |
| * buffer has zero length, no action is taken, otherwise the attributes are |
| * set and the mm->context.uses_cmm flag is set. |
| */ |
| static int kvm_s390_set_cmma_bits(struct kvm *kvm, |
| const struct kvm_s390_cmma_log *args) |
| { |
| unsigned long hva, mask, pgstev, i; |
| uint8_t *bits; |
| int srcu_idx, r = 0; |
| |
| mask = args->mask; |
| |
| if (!kvm->arch.use_cmma) |
| return -ENXIO; |
| /* invalid/unsupported flags */ |
| if (args->flags != 0) |
| return -EINVAL; |
| /* Enforce sane limit on memory allocation */ |
| if (args->count > KVM_S390_CMMA_SIZE_MAX) |
| return -EINVAL; |
| /* Nothing to do */ |
| if (args->count == 0) |
| return 0; |
| |
| bits = vmalloc(array_size(sizeof(*bits), args->count)); |
| if (!bits) |
| return -ENOMEM; |
| |
| r = copy_from_user(bits, (void __user *)args->values, args->count); |
| if (r) { |
| r = -EFAULT; |
| goto out; |
| } |
| |
| mmap_read_lock(kvm->mm); |
| srcu_idx = srcu_read_lock(&kvm->srcu); |
| for (i = 0; i < args->count; i++) { |
| hva = gfn_to_hva(kvm, args->start_gfn + i); |
| if (kvm_is_error_hva(hva)) { |
| r = -EFAULT; |
| break; |
| } |
| |
| pgstev = bits[i]; |
| pgstev = pgstev << 24; |
| mask &= _PGSTE_GPS_USAGE_MASK | _PGSTE_GPS_NODAT; |
| set_pgste_bits(kvm->mm, hva, mask, pgstev); |
| } |
| srcu_read_unlock(&kvm->srcu, srcu_idx); |
| mmap_read_unlock(kvm->mm); |
| |
| if (!kvm->mm->context.uses_cmm) { |
| mmap_write_lock(kvm->mm); |
| kvm->mm->context.uses_cmm = 1; |
| mmap_write_unlock(kvm->mm); |
| } |
| out: |
| vfree(bits); |
| return r; |
| } |
| |
| /** |
| * kvm_s390_cpus_from_pv - Convert all protected vCPUs in a protected VM to |
| * non protected. |
| * @kvm: the VM whose protected vCPUs are to be converted |
| * @rc: return value for the RC field of the UVC (in case of error) |
| * @rrc: return value for the RRC field of the UVC (in case of error) |
| * |
| * Does not stop in case of error, tries to convert as many |
| * CPUs as possible. In case of error, the RC and RRC of the last error are |
| * returned. |
| * |
| * Return: 0 in case of success, otherwise -EIO |
| */ |
| int kvm_s390_cpus_from_pv(struct kvm *kvm, u16 *rc, u16 *rrc) |
| { |
| struct kvm_vcpu *vcpu; |
| unsigned long i; |
| u16 _rc, _rrc; |
| int ret = 0; |
| |
| /* |
| * We ignore failures and try to destroy as many CPUs as possible. |
| * At the same time we must not free the assigned resources when |
| * this fails, as the ultravisor has still access to that memory. |
| * So kvm_s390_pv_destroy_cpu can leave a "wanted" memory leak |
| * behind. |
| * We want to return the first failure rc and rrc, though. |
| */ |
| kvm_for_each_vcpu(i, vcpu, kvm) { |
| mutex_lock(&vcpu->mutex); |
| if (kvm_s390_pv_destroy_cpu(vcpu, &_rc, &_rrc) && !ret) { |
| *rc = _rc; |
| *rrc = _rrc; |
| ret = -EIO; |
| } |
| mutex_unlock(&vcpu->mutex); |
| } |
| /* Ensure that we re-enable gisa if the non-PV guest used it but the PV guest did not. */ |
| if (use_gisa) |
| kvm_s390_gisa_enable(kvm); |
| return ret; |
| } |
| |
| /** |
| * kvm_s390_cpus_to_pv - Convert all non-protected vCPUs in a protected VM |
| * to protected. |
| * @kvm: the VM whose protected vCPUs are to be converted |
| * @rc: return value for the RC field of the UVC (in case of error) |
| * @rrc: return value for the RRC field of the UVC (in case of error) |
| * |
| * Tries to undo the conversion in case of error. |
| * |
| * Return: 0 in case of success, otherwise -EIO |
| */ |
| static int kvm_s390_cpus_to_pv(struct kvm *kvm, u16 *rc, u16 *rrc) |
| { |
| unsigned long i; |
| int r = 0; |
| u16 dummy; |
| |
| struct kvm_vcpu *vcpu; |
| |
| /* Disable the GISA if the ultravisor does not support AIV. */ |
| if (!test_bit_inv(BIT_UV_FEAT_AIV, &uv_info.uv_feature_indications)) |
| kvm_s390_gisa_disable(kvm); |
| |
| kvm_for_each_vcpu(i, vcpu, kvm) { |
| mutex_lock(&vcpu->mutex); |
| r = kvm_s390_pv_create_cpu(vcpu, rc, rrc); |
| mutex_unlock(&vcpu->mutex); |
| if (r) |
| break; |
| } |
| if (r) |
| kvm_s390_cpus_from_pv(kvm, &dummy, &dummy); |
| return r; |
| } |
| |
| /* |
| * Here we provide user space with a direct interface to query UV |
| * related data like UV maxima and available features as well as |
| * feature specific data. |
| * |
| * To facilitate future extension of the data structures we'll try to |
| * write data up to the maximum requested length. |
| */ |
| static ssize_t kvm_s390_handle_pv_info(struct kvm_s390_pv_info *info) |
| { |
| ssize_t len_min; |
| |
| switch (info->header.id) { |
| case KVM_PV_INFO_VM: { |
| len_min = sizeof(info->header) + sizeof(info->vm); |
| |
| if (info->header.len_max < len_min) |
| return -EINVAL; |
| |
| memcpy(info->vm.inst_calls_list, |
| uv_info.inst_calls_list, |
| sizeof(uv_info.inst_calls_list)); |
| |
| /* It's max cpuid not max cpus, so it's off by one */ |
| info->vm.max_cpus = uv_info.max_guest_cpu_id + 1; |
| info->vm.max_guests = uv_info.max_num_sec_conf; |
| info->vm.max_guest_addr = uv_info.max_sec_stor_addr; |
| info->vm.feature_indication = uv_info.uv_feature_indications; |
| |
| return len_min; |
| } |
| case KVM_PV_INFO_DUMP: { |
| len_min = sizeof(info->header) + sizeof(info->dump); |
| |
| if (info->header.len_max < len_min) |
| return -EINVAL; |
| |
| info->dump.dump_cpu_buffer_len = uv_info.guest_cpu_stor_len; |
| info->dump.dump_config_mem_buffer_per_1m = uv_info.conf_dump_storage_state_len; |
| info->dump.dump_config_finalize_len = uv_info.conf_dump_finalize_len; |
| return len_min; |
| } |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static int kvm_s390_pv_dmp(struct kvm *kvm, struct kvm_pv_cmd *cmd, |
| struct kvm_s390_pv_dmp dmp) |
| { |
| int r = -EINVAL; |
| void __user *result_buff = (void __user *)dmp.buff_addr; |
| |
| switch (dmp.subcmd) { |
| case KVM_PV_DUMP_INIT: { |
| if (kvm->arch.pv.dumping) |
| break; |
| |
| /* |
| * Block SIE entry as concurrent dump UVCs could lead |
| * to validities. |
| */ |
| kvm_s390_vcpu_block_all(kvm); |
| |
| r = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm), |
| UVC_CMD_DUMP_INIT, &cmd->rc, &cmd->rrc); |
| KVM_UV_EVENT(kvm, 3, "PROTVIRT DUMP INIT: rc %x rrc %x", |
| cmd->rc, cmd->rrc); |
| if (!r) { |
| kvm->arch.pv.dumping = true; |
| } else { |
| kvm_s390_vcpu_unblock_all(kvm); |
| r = -EINVAL; |
| } |
| break; |
| } |
| case KVM_PV_DUMP_CONFIG_STOR_STATE: { |
| if (!kvm->arch.pv.dumping) |
| break; |
| |
| /* |
| * gaddr is an output parameter since we might stop |
| * early. As dmp will be copied back in our caller, we |
| * don't need to do it ourselves. |
| */ |
| r = kvm_s390_pv_dump_stor_state(kvm, result_buff, &dmp.gaddr, dmp.buff_len, |
| &cmd->rc, &cmd->rrc); |
| break; |
| } |
| case KVM_PV_DUMP_COMPLETE: { |
| if (!kvm->arch.pv.dumping) |
| break; |
| |
| r = -EINVAL; |
| if (dmp.buff_len < uv_info.conf_dump_finalize_len) |
| break; |
| |
| r = kvm_s390_pv_dump_complete(kvm, result_buff, |
| &cmd->rc, &cmd->rrc); |
| break; |
| } |
| default: |
| r = -ENOTTY; |
| break; |
| } |
| |
| return r; |
| } |
| |
| static int kvm_s390_handle_pv(struct kvm *kvm, struct kvm_pv_cmd *cmd) |
| { |
| int r = 0; |
| u16 dummy; |
| void __user *argp = (void __user *)cmd->data; |
| |
| switch (cmd->cmd) { |
| case KVM_PV_ENABLE: { |
| r = -EINVAL; |
| if (kvm_s390_pv_is_protected(kvm)) |
| break; |
| |
| /* |
| * FMT 4 SIE needs esca. As we never switch back to bsca from |
| * esca, we need no cleanup in the error cases below |
| */ |
| r = sca_switch_to_extended(kvm); |
| if (r) |
| break; |
| |
| mmap_write_lock(current->mm); |
| r = gmap_mark_unmergeable(); |
| mmap_write_unlock(current->mm); |
| if (r) |
| break; |
| |
| r = kvm_s390_pv_init_vm(kvm, &cmd->rc, &cmd->rrc); |
| if (r) |
| break; |
| |
| r = kvm_s390_cpus_to_pv(kvm, &cmd->rc, &cmd->rrc); |
| if (r) |
| kvm_s390_pv_deinit_vm(kvm, &dummy, &dummy); |
| |
| /* we need to block service interrupts from now on */ |
| set_bit(IRQ_PEND_EXT_SERVICE, &kvm->arch.float_int.masked_irqs); |
| break; |
| } |
| case KVM_PV_DISABLE: { |
| r = -EINVAL; |
| if (!kvm_s390_pv_is_protected(kvm)) |
| break; |
| |
| r = kvm_s390_cpus_from_pv(kvm, &cmd->rc, &cmd->rrc); |
| /* |
| * If a CPU could not be destroyed, destroy VM will also fail. |
| * There is no point in trying to destroy it. Instead return |
| * the rc and rrc from the first CPU that failed destroying. |
| */ |
| if (r) |
| break; |
| r = kvm_s390_pv_deinit_vm(kvm, &cmd->rc, &cmd->rrc); |
| |
| /* no need to block service interrupts any more */ |
| clear_bit(IRQ_PEND_EXT_SERVICE, &kvm->arch.float_int.masked_irqs); |
| break; |
| } |
| case KVM_PV_SET_SEC_PARMS: { |
| struct kvm_s390_pv_sec_parm parms = {}; |
| void *hdr; |
| |
| r = -EINVAL; |
| if (!kvm_s390_pv_is_protected(kvm)) |
| break; |
| |
| r = -EFAULT; |
| if (copy_from_user(&parms, argp, sizeof(parms))) |
| break; |
| |
| /* Currently restricted to 8KB */ |
| r = -EINVAL; |
| if (parms.length > PAGE_SIZE * 2) |
| break; |
| |
| r = -ENOMEM; |
| hdr = vmalloc(parms.length); |
| if (!hdr) |
| break; |
| |
| r = -EFAULT; |
| if (!copy_from_user(hdr, (void __user *)parms.origin, |
| parms.length)) |
| r = kvm_s390_pv_set_sec_parms(kvm, hdr, parms.length, |
| &cmd->rc, &cmd->rrc); |
| |
| vfree(hdr); |
| break; |
| } |
| case KVM_PV_UNPACK: { |
| struct kvm_s390_pv_unp unp = {}; |
| |
| r = -EINVAL; |
| if (!kvm_s390_pv_is_protected(kvm) || !mm_is_protected(kvm->mm)) |
| break; |
| |
| r = -EFAULT; |
| if (copy_from_user(&unp, argp, sizeof(unp))) |
| break; |
| |
| r = kvm_s390_pv_unpack(kvm, unp.addr, unp.size, unp.tweak, |
| &cmd->rc, &cmd->rrc); |
| break; |
| } |
| case KVM_PV_VERIFY: { |
| r = -EINVAL; |
| if (!kvm_s390_pv_is_protected(kvm)) |
| break; |
| |
| r = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm), |
| UVC_CMD_VERIFY_IMG, &cmd->rc, &cmd->rrc); |
| KVM_UV_EVENT(kvm, 3, "PROTVIRT VERIFY: rc %x rrc %x", cmd->rc, |
| cmd->rrc); |
| break; |
| } |
| case KVM_PV_PREP_RESET: { |
| r = -EINVAL; |
| if (!kvm_s390_pv_is_protected(kvm)) |
| break; |
| |
| r = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm), |
| UVC_CMD_PREPARE_RESET, &cmd->rc, &cmd->rrc); |
| KVM_UV_EVENT(kvm, 3, "PROTVIRT PREP RESET: rc %x rrc %x", |
| cmd->rc, cmd->rrc); |
| break; |
| } |
| case KVM_PV_UNSHARE_ALL: { |
| r = -EINVAL; |
| if (!kvm_s390_pv_is_protected(kvm)) |
| break; |
| |
| r = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm), |
| UVC_CMD_SET_UNSHARE_ALL, &cmd->rc, &cmd->rrc); |
| KVM_UV_EVENT(kvm, 3, "PROTVIRT UNSHARE: rc %x rrc %x", |
| cmd->rc, cmd->rrc); |
| break; |
| } |
| case KVM_PV_INFO: { |
| struct kvm_s390_pv_info info = {}; |
| ssize_t data_len; |
| |
| /* |
| * No need to check the VM protection here. |
| * |
| * Maybe user space wants to query some of the data |
| * when the VM is still unprotected. If we see the |
| * need to fence a new data command we can still |
| * return an error in the info handler. |
| */ |
| |
| r = -EFAULT; |
| if (copy_from_user(&info, argp, sizeof(info.header))) |
| break; |
| |
| r = -EINVAL; |
| if (info.header.len_max < sizeof(info.header)) |
| break; |
| |
| data_len = kvm_s390_handle_pv_info(&info); |
| if (data_len < 0) { |
| r = data_len; |
| break; |
| } |
| /* |
| * If a data command struct is extended (multiple |
| * times) this can be used to determine how much of it |
| * is valid. |
| */ |
| info.header.len_written = data_len; |
| |
| r = -EFAULT; |
| if (copy_to_user(argp, &info, data_len)) |
| break; |
| |
| r = 0; |
| break; |
| } |
| case KVM_PV_DUMP: { |
| struct kvm_s390_pv_dmp dmp; |
| |
| r = -EINVAL; |
| if (!kvm_s390_pv_is_protected(kvm)) |
| break; |
| |
| r = -EFAULT; |
| if (copy_from_user(&dmp, argp, sizeof(dmp))) |
| break; |
| |
| r = kvm_s390_pv_dmp(kvm, cmd, dmp); |
| if (r) |
| break; |
| |
| if (copy_to_user(argp, &dmp, sizeof(dmp))) { |
| r = -EFAULT; |
| break; |
| } |
| |
| break; |
| } |
| default: |
| r = -ENOTTY; |
| } |
| return r; |
| } |
| |
| static bool access_key_invalid(u8 access_key) |
| { |
| return access_key > 0xf; |
| } |
| |
| static int kvm_s390_vm_mem_op(struct kvm *kvm, struct kvm_s390_mem_op *mop) |
| { |
| void __user *uaddr = (void __user *)mop->buf; |
| u64 supported_flags; |
| void *tmpbuf = NULL; |
| int r, srcu_idx; |
| |
| supported_flags = KVM_S390_MEMOP_F_SKEY_PROTECTION |
| | KVM_S390_MEMOP_F_CHECK_ONLY; |
| if (mop->flags & ~supported_flags || !mop->size) |
| return -EINVAL; |
| if (mop->size > MEM_OP_MAX_SIZE) |
| return -E2BIG; |
| /* |
| * This is technically a heuristic only, if the kvm->lock is not |
| * taken, it is not guaranteed that the vm is/remains non-protected. |
| * This is ok from a kernel perspective, wrongdoing is detected |
| * on the access, -EFAULT is returned and the vm may crash the |
| * next time it accesses the memory in question. |
| * There is no sane usecase to do switching and a memop on two |
| * different CPUs at the same time. |
| */ |
| if (kvm_s390_pv_get_handle(kvm)) |
| return -EINVAL; |
| if (mop->flags & KVM_S390_MEMOP_F_SKEY_PROTECTION) { |
| if (access_key_invalid(mop->key)) |
| return -EINVAL; |
| } else { |
| mop->key = 0; |
| } |
| if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) { |
| tmpbuf = vmalloc(mop->size); |
| if (!tmpbuf) |
| return -ENOMEM; |
| } |
| |
| srcu_idx = srcu_read_lock(&kvm->srcu); |
| |
| if (kvm_is_error_gpa(kvm, mop->gaddr)) { |
| r = PGM_ADDRESSING; |
| goto out_unlock; |
| } |
| |
| switch (mop->op) { |
| case KVM_S390_MEMOP_ABSOLUTE_READ: { |
| if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { |
| r = check_gpa_range(kvm, mop->gaddr, mop->size, GACC_FETCH, mop->key); |
| } else { |
| r = access_guest_abs_with_key(kvm, mop->gaddr, tmpbuf, |
| mop->size, GACC_FETCH, mop->key); |
| if (r == 0) { |
| if (copy_to_user(uaddr, tmpbuf, mop->size)) |
| r = -EFAULT; |
| } |
| } |
| break; |
| } |
| case KVM_S390_MEMOP_ABSOLUTE_WRITE: { |
| if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { |
| r = check_gpa_range(kvm, mop->gaddr, mop->size, GACC_STORE, mop->key); |
| } else { |
| if (copy_from_user(tmpbuf, uaddr, mop->size)) { |
| r = -EFAULT; |
| break; |
| } |
| r = access_guest_abs_with_key(kvm, mop->gaddr, tmpbuf, |
| mop->size, GACC_STORE, mop->key); |
| } |
| break; |
| } |
| default: |
| r = -EINVAL; |
| } |
| |
| out_unlock: |
| srcu_read_unlock(&kvm->srcu, srcu_idx); |
| |
| vfree(tmpbuf); |
| return r; |
| } |
| |
| long kvm_arch_vm_ioctl(struct file *filp, |
| unsigned int ioctl, unsigned long arg) |
| { |
| struct kvm *kvm = filp->private_data; |
| void __user *argp = (void __user *)arg; |
| struct kvm_device_attr attr; |
| int r; |
| |
| switch (ioctl) { |
| case KVM_S390_INTERRUPT: { |
| struct kvm_s390_interrupt s390int; |
| |
| r = -EFAULT; |
| if (copy_from_user(&s390int, argp, sizeof(s390int))) |
| break; |
| r = kvm_s390_inject_vm(kvm, &s390int); |
| break; |
| } |
| case KVM_CREATE_IRQCHIP: { |
| struct kvm_irq_routing_entry routing; |
| |
| r = -EINVAL; |
| if (kvm->arch.use_irqchip) { |
| /* Set up dummy routing. */ |
| memset(&routing, 0, sizeof(routing)); |
| r = kvm_set_irq_routing(kvm, &routing, 0, 0); |
| } |
| break; |
| } |
| case KVM_SET_DEVICE_ATTR: { |
| r = -EFAULT; |
| if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) |
| break; |
| r = kvm_s390_vm_set_attr(kvm, &attr); |
| break; |
| } |
| case KVM_GET_DEVICE_ATTR: { |
| r = -EFAULT; |
| if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) |
| break; |
| r = kvm_s390_vm_get_attr(kvm, &attr); |
| break; |
| } |
| case KVM_HAS_DEVICE_ATTR: { |
| r = -EFAULT; |
|
|