| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * in-kernel handling for sie intercepts |
| * |
| * Copyright IBM Corp. 2008, 2020 |
| * |
| * Author(s): Carsten Otte <cotte@de.ibm.com> |
| * Christian Borntraeger <borntraeger@de.ibm.com> |
| */ |
| |
| #include <linux/kvm_host.h> |
| #include <linux/errno.h> |
| #include <linux/pagemap.h> |
| |
| #include <asm/asm-offsets.h> |
| #include <asm/irq.h> |
| #include <asm/sysinfo.h> |
| #include <asm/uv.h> |
| |
| #include "kvm-s390.h" |
| #include "gaccess.h" |
| #include "trace.h" |
| #include "trace-s390.h" |
| |
| u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu) |
| { |
| struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block; |
| u8 ilen = 0; |
| |
| switch (vcpu->arch.sie_block->icptcode) { |
| case ICPT_INST: |
| case ICPT_INSTPROGI: |
| case ICPT_OPEREXC: |
| case ICPT_PARTEXEC: |
| case ICPT_IOINST: |
| /* instruction only stored for these icptcodes */ |
| ilen = insn_length(vcpu->arch.sie_block->ipa >> 8); |
| /* Use the length of the EXECUTE instruction if necessary */ |
| if (sie_block->icptstatus & 1) { |
| ilen = (sie_block->icptstatus >> 4) & 0x6; |
| if (!ilen) |
| ilen = 4; |
| } |
| break; |
| case ICPT_PROGI: |
| /* bit 1+2 of pgmilc are the ilc, so we directly get ilen */ |
| ilen = vcpu->arch.sie_block->pgmilc & 0x6; |
| break; |
| } |
| return ilen; |
| } |
| |
| static int handle_stop(struct kvm_vcpu *vcpu) |
| { |
| struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
| int rc = 0; |
| uint8_t flags, stop_pending; |
| |
| vcpu->stat.exit_stop_request++; |
| |
| /* delay the stop if any non-stop irq is pending */ |
| if (kvm_s390_vcpu_has_irq(vcpu, 1)) |
| return 0; |
| |
| /* avoid races with the injection/SIGP STOP code */ |
| spin_lock(&li->lock); |
| flags = li->irq.stop.flags; |
| stop_pending = kvm_s390_is_stop_irq_pending(vcpu); |
| spin_unlock(&li->lock); |
| |
| trace_kvm_s390_stop_request(stop_pending, flags); |
| if (!stop_pending) |
| return 0; |
| |
| if (flags & KVM_S390_STOP_FLAG_STORE_STATUS) { |
| rc = kvm_s390_vcpu_store_status(vcpu, |
| KVM_S390_STORE_STATUS_NOADDR); |
| if (rc) |
| return rc; |
| } |
| |
| /* |
| * no need to check the return value of vcpu_stop as it can only have |
| * an error for protvirt, but protvirt means user cpu state |
| */ |
| if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
| kvm_s390_vcpu_stop(vcpu); |
| return -EOPNOTSUPP; |
| } |
| |
| static int handle_validity(struct kvm_vcpu *vcpu) |
| { |
| int viwhy = vcpu->arch.sie_block->ipb >> 16; |
| |
| vcpu->stat.exit_validity++; |
| trace_kvm_s390_intercept_validity(vcpu, viwhy); |
| KVM_EVENT(3, "validity intercept 0x%x for pid %u (kvm 0x%pK)", viwhy, |
| current->pid, vcpu->kvm); |
| |
| /* do not warn on invalid runtime instrumentation mode */ |
| WARN_ONCE(viwhy != 0x44, "kvm: unhandled validity intercept 0x%x\n", |
| viwhy); |
| return -EINVAL; |
| } |
| |
| static int handle_instruction(struct kvm_vcpu *vcpu) |
| { |
| vcpu->stat.exit_instruction++; |
| trace_kvm_s390_intercept_instruction(vcpu, |
| vcpu->arch.sie_block->ipa, |
| vcpu->arch.sie_block->ipb); |
| |
| switch (vcpu->arch.sie_block->ipa >> 8) { |
| case 0x01: |
| return kvm_s390_handle_01(vcpu); |
| case 0x82: |
| return kvm_s390_handle_lpsw(vcpu); |
| case 0x83: |
| return kvm_s390_handle_diag(vcpu); |
| case 0xaa: |
| return kvm_s390_handle_aa(vcpu); |
| case 0xae: |
| return kvm_s390_handle_sigp(vcpu); |
| case 0xb2: |
| return kvm_s390_handle_b2(vcpu); |
| case 0xb6: |
| return kvm_s390_handle_stctl(vcpu); |
| case 0xb7: |
| return kvm_s390_handle_lctl(vcpu); |
| case 0xb9: |
| return kvm_s390_handle_b9(vcpu); |
| case 0xe3: |
| return kvm_s390_handle_e3(vcpu); |
| case 0xe5: |
| return kvm_s390_handle_e5(vcpu); |
| case 0xeb: |
| return kvm_s390_handle_eb(vcpu); |
| default: |
| return -EOPNOTSUPP; |
| } |
| } |
| |
| static int inject_prog_on_prog_intercept(struct kvm_vcpu *vcpu) |
| { |
| struct kvm_s390_pgm_info pgm_info = { |
| .code = vcpu->arch.sie_block->iprcc, |
| /* the PSW has already been rewound */ |
| .flags = KVM_S390_PGM_FLAGS_NO_REWIND, |
| }; |
| |
| switch (vcpu->arch.sie_block->iprcc & ~PGM_PER) { |
| case PGM_AFX_TRANSLATION: |
| case PGM_ASX_TRANSLATION: |
| case PGM_EX_TRANSLATION: |
| case PGM_LFX_TRANSLATION: |
| case PGM_LSTE_SEQUENCE: |
| case PGM_LSX_TRANSLATION: |
| case PGM_LX_TRANSLATION: |
| case PGM_PRIMARY_AUTHORITY: |
| case PGM_SECONDARY_AUTHORITY: |
| case PGM_SPACE_SWITCH: |
| pgm_info.trans_exc_code = vcpu->arch.sie_block->tecmc; |
| break; |
| case PGM_ALEN_TRANSLATION: |
| case PGM_ALE_SEQUENCE: |
| case PGM_ASTE_INSTANCE: |
| case PGM_ASTE_SEQUENCE: |
| case PGM_ASTE_VALIDITY: |
| case PGM_EXTENDED_AUTHORITY: |
| pgm_info.exc_access_id = vcpu->arch.sie_block->eai; |
| break; |
| case PGM_ASCE_TYPE: |
| case PGM_PAGE_TRANSLATION: |
| case PGM_REGION_FIRST_TRANS: |
| case PGM_REGION_SECOND_TRANS: |
| case PGM_REGION_THIRD_TRANS: |
| case PGM_SEGMENT_TRANSLATION: |
| pgm_info.trans_exc_code = vcpu->arch.sie_block->tecmc; |
| pgm_info.exc_access_id = vcpu->arch.sie_block->eai; |
| pgm_info.op_access_id = vcpu->arch.sie_block->oai; |
| break; |
| case PGM_MONITOR: |
| pgm_info.mon_class_nr = vcpu->arch.sie_block->mcn; |
| pgm_info.mon_code = vcpu->arch.sie_block->tecmc; |
| break; |
| case PGM_VECTOR_PROCESSING: |
| case PGM_DATA: |
| pgm_info.data_exc_code = vcpu->arch.sie_block->dxc; |
| break; |
| case PGM_PROTECTION: |
| pgm_info.trans_exc_code = vcpu->arch.sie_block->tecmc; |
| pgm_info.exc_access_id = vcpu->arch.sie_block->eai; |
| break; |
| default: |
| break; |
| } |
| |
| if (vcpu->arch.sie_block->iprcc & PGM_PER) { |
| pgm_info.per_code = vcpu->arch.sie_block->perc; |
| pgm_info.per_atmid = vcpu->arch.sie_block->peratmid; |
| pgm_info.per_address = vcpu->arch.sie_block->peraddr; |
| pgm_info.per_access_id = vcpu->arch.sie_block->peraid; |
| } |
| return kvm_s390_inject_prog_irq(vcpu, &pgm_info); |
| } |
| |
| /* |
| * restore ITDB to program-interruption TDB in guest lowcore |
| * and set TX abort indication if required |
| */ |
| static int handle_itdb(struct kvm_vcpu *vcpu) |
| { |
| struct kvm_s390_itdb *itdb; |
| int rc; |
| |
| if (!IS_TE_ENABLED(vcpu) || !IS_ITDB_VALID(vcpu)) |
| return 0; |
| if (current->thread.per_flags & PER_FLAG_NO_TE) |
| return 0; |
| itdb = phys_to_virt(vcpu->arch.sie_block->itdba); |
| rc = write_guest_lc(vcpu, __LC_PGM_TDB, itdb, sizeof(*itdb)); |
| if (rc) |
| return rc; |
| memset(itdb, 0, sizeof(*itdb)); |
| |
| return 0; |
| } |
| |
| #define per_event(vcpu) (vcpu->arch.sie_block->iprcc & PGM_PER) |
| |
| static int handle_prog(struct kvm_vcpu *vcpu) |
| { |
| psw_t psw; |
| int rc; |
| |
| vcpu->stat.exit_program_interruption++; |
| |
| /* |
| * Intercept 8 indicates a loop of specification exceptions |
| * for protected guests. |
| */ |
| if (kvm_s390_pv_cpu_is_protected(vcpu)) |
| return -EOPNOTSUPP; |
| |
| if (guestdbg_enabled(vcpu) && per_event(vcpu)) { |
| rc = kvm_s390_handle_per_event(vcpu); |
| if (rc) |
| return rc; |
| /* the interrupt might have been filtered out completely */ |
| if (vcpu->arch.sie_block->iprcc == 0) |
| return 0; |
| } |
| |
| trace_kvm_s390_intercept_prog(vcpu, vcpu->arch.sie_block->iprcc); |
| if (vcpu->arch.sie_block->iprcc == PGM_SPECIFICATION) { |
| rc = read_guest_lc(vcpu, __LC_PGM_NEW_PSW, &psw, sizeof(psw_t)); |
| if (rc) |
| return rc; |
| /* Avoid endless loops of specification exceptions */ |
| if (!is_valid_psw(&psw)) |
| return -EOPNOTSUPP; |
| } |
| rc = handle_itdb(vcpu); |
| if (rc) |
| return rc; |
| |
| return inject_prog_on_prog_intercept(vcpu); |
| } |
| |
| /** |
| * handle_external_interrupt - used for external interruption interceptions |
| * @vcpu: virtual cpu |
| * |
| * This interception occurs if: |
| * - the CPUSTAT_EXT_INT bit was already set when the external interrupt |
| * occurred. In this case, the interrupt needs to be injected manually to |
| * preserve interrupt priority. |
| * - the external new PSW has external interrupts enabled, which will cause an |
| * interruption loop. We drop to userspace in this case. |
| * |
| * The latter case can be detected by inspecting the external mask bit in the |
| * external new psw. |
| * |
| * Under PV, only the latter case can occur, since interrupt priorities are |
| * handled in the ultravisor. |
| */ |
| static int handle_external_interrupt(struct kvm_vcpu *vcpu) |
| { |
| u16 eic = vcpu->arch.sie_block->eic; |
| struct kvm_s390_irq irq; |
| psw_t newpsw; |
| int rc; |
| |
| vcpu->stat.exit_external_interrupt++; |
| |
| if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
| newpsw = vcpu->arch.sie_block->gpsw; |
| } else { |
| rc = read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &newpsw, sizeof(psw_t)); |
| if (rc) |
| return rc; |
| } |
| |
| /* |
| * Clock comparator or timer interrupt with external interrupt enabled |
| * will cause interrupt loop. Drop to userspace. |
| */ |
| if ((eic == EXT_IRQ_CLK_COMP || eic == EXT_IRQ_CPU_TIMER) && |
| (newpsw.mask & PSW_MASK_EXT)) |
| return -EOPNOTSUPP; |
| |
| switch (eic) { |
| case EXT_IRQ_CLK_COMP: |
| irq.type = KVM_S390_INT_CLOCK_COMP; |
| break; |
| case EXT_IRQ_CPU_TIMER: |
| irq.type = KVM_S390_INT_CPU_TIMER; |
| break; |
| case EXT_IRQ_EXTERNAL_CALL: |
| irq.type = KVM_S390_INT_EXTERNAL_CALL; |
| irq.u.extcall.code = vcpu->arch.sie_block->extcpuaddr; |
| rc = kvm_s390_inject_vcpu(vcpu, &irq); |
| /* ignore if another external call is already pending */ |
| if (rc == -EBUSY) |
| return 0; |
| return rc; |
| default: |
| return -EOPNOTSUPP; |
| } |
| |
| return kvm_s390_inject_vcpu(vcpu, &irq); |
| } |
| |
| /** |
| * handle_mvpg_pei - Handle MOVE PAGE partial execution interception. |
| * @vcpu: virtual cpu |
| * |
| * This interception can only happen for guests with DAT disabled and |
| * addresses that are currently not mapped in the host. Thus we try to |
| * set up the mappings for the corresponding user pages here (or throw |
| * addressing exceptions in case of illegal guest addresses). |
| */ |
| static int handle_mvpg_pei(struct kvm_vcpu *vcpu) |
| { |
| unsigned long srcaddr, dstaddr; |
| int reg1, reg2, rc; |
| |
| kvm_s390_get_regs_rre(vcpu, ®1, ®2); |
| |
| /* Ensure that the source is paged-in, no actual access -> no key checking */ |
| rc = guest_translate_address_with_key(vcpu, vcpu->run->s.regs.gprs[reg2], |
| reg2, &srcaddr, GACC_FETCH, 0); |
| if (rc) |
| return kvm_s390_inject_prog_cond(vcpu, rc); |
| rc = kvm_arch_fault_in_page(vcpu, srcaddr, 0); |
| if (rc != 0) |
| return rc; |
| |
| /* Ensure that the source is paged-in, no actual access -> no key checking */ |
| rc = guest_translate_address_with_key(vcpu, vcpu->run->s.regs.gprs[reg1], |
| reg1, &dstaddr, GACC_STORE, 0); |
| if (rc) |
| return kvm_s390_inject_prog_cond(vcpu, rc); |
| rc = kvm_arch_fault_in_page(vcpu, dstaddr, 1); |
| if (rc != 0) |
| return rc; |
| |
| kvm_s390_retry_instr(vcpu); |
| |
| return 0; |
| } |
| |
| static int handle_partial_execution(struct kvm_vcpu *vcpu) |
| { |
| vcpu->stat.exit_pei++; |
| |
| if (vcpu->arch.sie_block->ipa == 0xb254) /* MVPG */ |
| return handle_mvpg_pei(vcpu); |
| if (vcpu->arch.sie_block->ipa >> 8 == 0xae) /* SIGP */ |
| return kvm_s390_handle_sigp_pei(vcpu); |
| |
| return -EOPNOTSUPP; |
| } |
| |
| /* |
| * Handle the sthyi instruction that provides the guest with system |
| * information, like current CPU resources available at each level of |
| * the machine. |
| */ |
| int handle_sthyi(struct kvm_vcpu *vcpu) |
| { |
| int reg1, reg2, cc = 0, r = 0; |
| u64 code, addr, rc = 0; |
| struct sthyi_sctns *sctns = NULL; |
| |
| if (!test_kvm_facility(vcpu->kvm, 74)) |
| return kvm_s390_inject_program_int(vcpu, PGM_OPERATION); |
| |
| kvm_s390_get_regs_rre(vcpu, ®1, ®2); |
| code = vcpu->run->s.regs.gprs[reg1]; |
| addr = vcpu->run->s.regs.gprs[reg2]; |
| |
| vcpu->stat.instruction_sthyi++; |
| VCPU_EVENT(vcpu, 3, "STHYI: fc: %llu addr: 0x%016llx", code, addr); |
| trace_kvm_s390_handle_sthyi(vcpu, code, addr); |
| |
| if (reg1 == reg2 || reg1 & 1 || reg2 & 1) |
| return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); |
| |
| if (code & 0xffff) { |
| cc = 3; |
| rc = 4; |
| goto out; |
| } |
| |
| if (!kvm_s390_pv_cpu_is_protected(vcpu) && (addr & ~PAGE_MASK)) |
| return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); |
| |
| sctns = (void *)get_zeroed_page(GFP_KERNEL_ACCOUNT); |
| if (!sctns) |
| return -ENOMEM; |
| |
| cc = sthyi_fill(sctns, &rc); |
| if (cc < 0) { |
| free_page((unsigned long)sctns); |
| return cc; |
| } |
| out: |
| if (!cc) { |
| if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
| memcpy(sida_addr(vcpu->arch.sie_block), sctns, PAGE_SIZE); |
| } else { |
| r = write_guest(vcpu, addr, reg2, sctns, PAGE_SIZE); |
| if (r) { |
| free_page((unsigned long)sctns); |
| return kvm_s390_inject_prog_cond(vcpu, r); |
| } |
| } |
| } |
| |
| free_page((unsigned long)sctns); |
| vcpu->run->s.regs.gprs[reg2 + 1] = rc; |
| kvm_s390_set_psw_cc(vcpu, cc); |
| return r; |
| } |
| |
| static int handle_operexc(struct kvm_vcpu *vcpu) |
| { |
| psw_t oldpsw, newpsw; |
| int rc; |
| |
| vcpu->stat.exit_operation_exception++; |
| trace_kvm_s390_handle_operexc(vcpu, vcpu->arch.sie_block->ipa, |
| vcpu->arch.sie_block->ipb); |
| |
| if (vcpu->arch.sie_block->ipa == 0xb256) |
| return handle_sthyi(vcpu); |
| |
| if (vcpu->arch.sie_block->ipa == 0 && vcpu->kvm->arch.user_instr0) |
| return -EOPNOTSUPP; |
| rc = read_guest_lc(vcpu, __LC_PGM_NEW_PSW, &newpsw, sizeof(psw_t)); |
| if (rc) |
| return rc; |
| /* |
| * Avoid endless loops of operation exceptions, if the pgm new |
| * PSW will cause a new operation exception. |
| * The heuristic checks if the pgm new psw is within 6 bytes before |
| * the faulting psw address (with same DAT, AS settings) and the |
| * new psw is not a wait psw and the fault was not triggered by |
| * problem state. |
| */ |
| oldpsw = vcpu->arch.sie_block->gpsw; |
| if (oldpsw.addr - newpsw.addr <= 6 && |
| !(newpsw.mask & PSW_MASK_WAIT) && |
| !(oldpsw.mask & PSW_MASK_PSTATE) && |
| (newpsw.mask & PSW_MASK_ASC) == (oldpsw.mask & PSW_MASK_ASC) && |
| (newpsw.mask & PSW_MASK_DAT) == (oldpsw.mask & PSW_MASK_DAT)) |
| return -EOPNOTSUPP; |
| |
| return kvm_s390_inject_program_int(vcpu, PGM_OPERATION); |
| } |
| |
| static int handle_pv_spx(struct kvm_vcpu *vcpu) |
| { |
| u32 pref = *(u32 *)sida_addr(vcpu->arch.sie_block); |
| |
| kvm_s390_set_prefix(vcpu, pref); |
| trace_kvm_s390_handle_prefix(vcpu, 1, pref); |
| return 0; |
| } |
| |
| static int handle_pv_sclp(struct kvm_vcpu *vcpu) |
| { |
| struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
| |
| spin_lock(&fi->lock); |
| /* |
| * 2 cases: |
| * a: an sccb answering interrupt was already pending or in flight. |
| * As the sccb value is not known we can simply set some value to |
| * trigger delivery of a saved SCCB. UV will then use its saved |
| * copy of the SCCB value. |
| * b: an error SCCB interrupt needs to be injected so we also inject |
| * a fake SCCB address. Firmware will use the proper one. |
| * This makes sure, that both errors and real sccb returns will only |
| * be delivered after a notification intercept (instruction has |
| * finished) but not after others. |
| */ |
| fi->srv_signal.ext_params |= 0x43000; |
| set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); |
| clear_bit(IRQ_PEND_EXT_SERVICE, &fi->masked_irqs); |
| spin_unlock(&fi->lock); |
| return 0; |
| } |
| |
| static int handle_pv_uvc(struct kvm_vcpu *vcpu) |
| { |
| struct uv_cb_share *guest_uvcb = sida_addr(vcpu->arch.sie_block); |
| struct uv_cb_cts uvcb = { |
| .header.cmd = UVC_CMD_UNPIN_PAGE_SHARED, |
| .header.len = sizeof(uvcb), |
| .guest_handle = kvm_s390_pv_get_handle(vcpu->kvm), |
| .gaddr = guest_uvcb->paddr, |
| }; |
| int rc; |
| |
| if (guest_uvcb->header.cmd != UVC_CMD_REMOVE_SHARED_ACCESS) { |
| WARN_ONCE(1, "Unexpected notification intercept for UVC 0x%x\n", |
| guest_uvcb->header.cmd); |
| return 0; |
| } |
| rc = gmap_make_secure(vcpu->arch.gmap, uvcb.gaddr, &uvcb); |
| /* |
| * If the unpin did not succeed, the guest will exit again for the UVC |
| * and we will retry the unpin. |
| */ |
| if (rc == -EINVAL) |
| return 0; |
| /* |
| * If we got -EAGAIN here, we simply return it. It will eventually |
| * get propagated all the way to userspace, which should then try |
| * again. |
| */ |
| return rc; |
| } |
| |
| static int handle_pv_notification(struct kvm_vcpu *vcpu) |
| { |
| int ret; |
| |
| if (vcpu->arch.sie_block->ipa == 0xb210) |
| return handle_pv_spx(vcpu); |
| if (vcpu->arch.sie_block->ipa == 0xb220) |
| return handle_pv_sclp(vcpu); |
| if (vcpu->arch.sie_block->ipa == 0xb9a4) |
| return handle_pv_uvc(vcpu); |
| if (vcpu->arch.sie_block->ipa >> 8 == 0xae) { |
| /* |
| * Besides external call, other SIGP orders also cause a |
| * 108 (pv notify) intercept. In contrast to external call, |
| * these orders need to be emulated and hence the appropriate |
| * place to handle them is in handle_instruction(). |
| * So first try kvm_s390_handle_sigp_pei() and if that isn't |
| * successful, go on with handle_instruction(). |
| */ |
| ret = kvm_s390_handle_sigp_pei(vcpu); |
| if (!ret) |
| return ret; |
| } |
| |
| return handle_instruction(vcpu); |
| } |
| |
| int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu) |
| { |
| int rc, per_rc = 0; |
| |
| if (kvm_is_ucontrol(vcpu->kvm)) |
| return -EOPNOTSUPP; |
| |
| switch (vcpu->arch.sie_block->icptcode) { |
| case ICPT_EXTREQ: |
| vcpu->stat.exit_external_request++; |
| return 0; |
| case ICPT_IOREQ: |
| vcpu->stat.exit_io_request++; |
| return 0; |
| case ICPT_INST: |
| rc = handle_instruction(vcpu); |
| break; |
| case ICPT_PROGI: |
| return handle_prog(vcpu); |
| case ICPT_EXTINT: |
| return handle_external_interrupt(vcpu); |
| case ICPT_WAIT: |
| return kvm_s390_handle_wait(vcpu); |
| case ICPT_VALIDITY: |
| return handle_validity(vcpu); |
| case ICPT_STOP: |
| return handle_stop(vcpu); |
| case ICPT_OPEREXC: |
| rc = handle_operexc(vcpu); |
| break; |
| case ICPT_PARTEXEC: |
| rc = handle_partial_execution(vcpu); |
| break; |
| case ICPT_KSS: |
| rc = kvm_s390_skey_check_enable(vcpu); |
| break; |
| case ICPT_MCHKREQ: |
| case ICPT_INT_ENABLE: |
| /* |
| * PSW bit 13 or a CR (0, 6, 14) changed and we might |
| * now be able to deliver interrupts. The pre-run code |
| * will take care of this. |
| */ |
| rc = 0; |
| break; |
| case ICPT_PV_INSTR: |
| rc = handle_instruction(vcpu); |
| break; |
| case ICPT_PV_NOTIFY: |
| rc = handle_pv_notification(vcpu); |
| break; |
| case ICPT_PV_PREF: |
| rc = 0; |
| gmap_convert_to_secure(vcpu->arch.gmap, |
| kvm_s390_get_prefix(vcpu)); |
| gmap_convert_to_secure(vcpu->arch.gmap, |
| kvm_s390_get_prefix(vcpu) + PAGE_SIZE); |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| |
| /* process PER, also if the instruction is processed in user space */ |
| if (vcpu->arch.sie_block->icptstatus & 0x02 && |
| (!rc || rc == -EOPNOTSUPP)) |
| per_rc = kvm_s390_handle_per_ifetch_icpt(vcpu); |
| return per_rc ? per_rc : rc; |
| } |