| /* |
| * handling kvm guest interrupts |
| * |
| * Copyright IBM Corp. 2008,2014 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License (version 2 only) |
| * as published by the Free Software Foundation. |
| * |
| * Author(s): Carsten Otte <cotte@de.ibm.com> |
| */ |
| |
| #include <linux/interrupt.h> |
| #include <linux/kvm_host.h> |
| #include <linux/hrtimer.h> |
| #include <linux/mmu_context.h> |
| #include <linux/signal.h> |
| #include <linux/slab.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/uaccess.h> |
| #include "kvm-s390.h" |
| #include "gaccess.h" |
| #include "trace-s390.h" |
| |
| #define IOINT_SCHID_MASK 0x0000ffff |
| #define IOINT_SSID_MASK 0x00030000 |
| #define IOINT_CSSID_MASK 0x03fc0000 |
| #define IOINT_AI_MASK 0x04000000 |
| #define PFAULT_INIT 0x0600 |
| |
| static int __must_check deliver_ckc_interrupt(struct kvm_vcpu *vcpu); |
| |
| static int is_ioint(u64 type) |
| { |
| return ((type & 0xfffe0000u) != 0xfffe0000u); |
| } |
| |
| int psw_extint_disabled(struct kvm_vcpu *vcpu) |
| { |
| return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT); |
| } |
| |
| static int psw_ioint_disabled(struct kvm_vcpu *vcpu) |
| { |
| return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO); |
| } |
| |
| static int psw_mchk_disabled(struct kvm_vcpu *vcpu) |
| { |
| return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK); |
| } |
| |
| static int psw_interrupts_disabled(struct kvm_vcpu *vcpu) |
| { |
| if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) || |
| (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) || |
| (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT)) |
| return 0; |
| return 1; |
| } |
| |
| static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu) |
| { |
| if (psw_extint_disabled(vcpu) || |
| !(vcpu->arch.sie_block->gcr[0] & 0x800ul)) |
| return 0; |
| if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu)) |
| /* No timer interrupts when single stepping */ |
| return 0; |
| return 1; |
| } |
| |
| static u64 int_word_to_isc_bits(u32 int_word) |
| { |
| u8 isc = (int_word & 0x38000000) >> 27; |
| |
| return (0x80 >> isc) << 24; |
| } |
| |
| static int __must_check __interrupt_is_deliverable(struct kvm_vcpu *vcpu, |
| struct kvm_s390_interrupt_info *inti) |
| { |
| switch (inti->type) { |
| case KVM_S390_INT_EXTERNAL_CALL: |
| if (psw_extint_disabled(vcpu)) |
| return 0; |
| if (vcpu->arch.sie_block->gcr[0] & 0x2000ul) |
| return 1; |
| return 0; |
| case KVM_S390_INT_EMERGENCY: |
| if (psw_extint_disabled(vcpu)) |
| return 0; |
| if (vcpu->arch.sie_block->gcr[0] & 0x4000ul) |
| return 1; |
| return 0; |
| case KVM_S390_INT_CLOCK_COMP: |
| return ckc_interrupts_enabled(vcpu); |
| case KVM_S390_INT_CPU_TIMER: |
| if (psw_extint_disabled(vcpu)) |
| return 0; |
| if (vcpu->arch.sie_block->gcr[0] & 0x400ul) |
| return 1; |
| return 0; |
| case KVM_S390_INT_SERVICE: |
| case KVM_S390_INT_PFAULT_INIT: |
| case KVM_S390_INT_PFAULT_DONE: |
| case KVM_S390_INT_VIRTIO: |
| if (psw_extint_disabled(vcpu)) |
| return 0; |
| if (vcpu->arch.sie_block->gcr[0] & 0x200ul) |
| return 1; |
| return 0; |
| case KVM_S390_PROGRAM_INT: |
| case KVM_S390_SIGP_STOP: |
| case KVM_S390_SIGP_SET_PREFIX: |
| case KVM_S390_RESTART: |
| return 1; |
| case KVM_S390_MCHK: |
| if (psw_mchk_disabled(vcpu)) |
| return 0; |
| if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14) |
| return 1; |
| return 0; |
| case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
| if (psw_ioint_disabled(vcpu)) |
| return 0; |
| if (vcpu->arch.sie_block->gcr[6] & |
| int_word_to_isc_bits(inti->io.io_int_word)) |
| return 1; |
| return 0; |
| default: |
| printk(KERN_WARNING "illegal interrupt type %llx\n", |
| inti->type); |
| BUG(); |
| } |
| return 0; |
| } |
| |
| static void __set_cpu_idle(struct kvm_vcpu *vcpu) |
| { |
| atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
| set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); |
| } |
| |
| static void __unset_cpu_idle(struct kvm_vcpu *vcpu) |
| { |
| atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
| clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); |
| } |
| |
| static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) |
| { |
| atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT, |
| &vcpu->arch.sie_block->cpuflags); |
| vcpu->arch.sie_block->lctl = 0x0000; |
| vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT); |
| |
| if (guestdbg_enabled(vcpu)) { |
| vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 | |
| LCTL_CR10 | LCTL_CR11); |
| vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT); |
| } |
| |
| if (vcpu->arch.local_int.action_bits & ACTION_STOP_ON_STOP) |
| atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); |
| } |
| |
| static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag) |
| { |
| atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags); |
| } |
| |
| static void __set_intercept_indicator(struct kvm_vcpu *vcpu, |
| struct kvm_s390_interrupt_info *inti) |
| { |
| switch (inti->type) { |
| case KVM_S390_INT_EXTERNAL_CALL: |
| case KVM_S390_INT_EMERGENCY: |
| case KVM_S390_INT_SERVICE: |
| case KVM_S390_INT_PFAULT_INIT: |
| case KVM_S390_INT_PFAULT_DONE: |
| case KVM_S390_INT_VIRTIO: |
| case KVM_S390_INT_CLOCK_COMP: |
| case KVM_S390_INT_CPU_TIMER: |
| if (psw_extint_disabled(vcpu)) |
| __set_cpuflag(vcpu, CPUSTAT_EXT_INT); |
| else |
| vcpu->arch.sie_block->lctl |= LCTL_CR0; |
| break; |
| case KVM_S390_SIGP_STOP: |
| __set_cpuflag(vcpu, CPUSTAT_STOP_INT); |
| break; |
| case KVM_S390_MCHK: |
| if (psw_mchk_disabled(vcpu)) |
| vcpu->arch.sie_block->ictl |= ICTL_LPSW; |
| else |
| vcpu->arch.sie_block->lctl |= LCTL_CR14; |
| break; |
| case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
| if (psw_ioint_disabled(vcpu)) |
| __set_cpuflag(vcpu, CPUSTAT_IO_INT); |
| else |
| vcpu->arch.sie_block->lctl |= LCTL_CR6; |
| break; |
| default: |
| BUG(); |
| } |
| } |
| |
| static u16 get_ilc(struct kvm_vcpu *vcpu) |
| { |
| const unsigned short table[] = { 2, 4, 4, 6 }; |
| |
| switch (vcpu->arch.sie_block->icptcode) { |
| case ICPT_INST: |
| case ICPT_INSTPROGI: |
| case ICPT_OPEREXC: |
| case ICPT_PARTEXEC: |
| case ICPT_IOINST: |
| /* last instruction only stored for these icptcodes */ |
| return table[vcpu->arch.sie_block->ipa >> 14]; |
| case ICPT_PROGI: |
| return vcpu->arch.sie_block->pgmilc; |
| default: |
| return 0; |
| } |
| } |
| |
| static int __must_check __deliver_prog_irq(struct kvm_vcpu *vcpu, |
| struct kvm_s390_pgm_info *pgm_info) |
| { |
| int rc = 0; |
| u16 ilc = get_ilc(vcpu); |
| |
| switch (pgm_info->code & ~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: |
| rc = put_guest_lc(vcpu, pgm_info->trans_exc_code, |
| (u64 *)__LC_TRANS_EXC_CODE); |
| 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: |
| rc = put_guest_lc(vcpu, pgm_info->exc_access_id, |
| (u8 *)__LC_EXC_ACCESS_ID); |
| 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: |
| rc = put_guest_lc(vcpu, pgm_info->trans_exc_code, |
| (u64 *)__LC_TRANS_EXC_CODE); |
| rc |= put_guest_lc(vcpu, pgm_info->exc_access_id, |
| (u8 *)__LC_EXC_ACCESS_ID); |
| rc |= put_guest_lc(vcpu, pgm_info->op_access_id, |
| (u8 *)__LC_OP_ACCESS_ID); |
| break; |
| case PGM_MONITOR: |
| rc = put_guest_lc(vcpu, pgm_info->mon_class_nr, |
| (u64 *)__LC_MON_CLASS_NR); |
| rc |= put_guest_lc(vcpu, pgm_info->mon_code, |
| (u64 *)__LC_MON_CODE); |
| break; |
| case PGM_DATA: |
| rc = put_guest_lc(vcpu, pgm_info->data_exc_code, |
| (u32 *)__LC_DATA_EXC_CODE); |
| break; |
| case PGM_PROTECTION: |
| rc = put_guest_lc(vcpu, pgm_info->trans_exc_code, |
| (u64 *)__LC_TRANS_EXC_CODE); |
| rc |= put_guest_lc(vcpu, pgm_info->exc_access_id, |
| (u8 *)__LC_EXC_ACCESS_ID); |
| break; |
| } |
| |
| if (pgm_info->code & PGM_PER) { |
| rc |= put_guest_lc(vcpu, pgm_info->per_code, |
| (u8 *) __LC_PER_CODE); |
| rc |= put_guest_lc(vcpu, pgm_info->per_atmid, |
| (u8 *)__LC_PER_ATMID); |
| rc |= put_guest_lc(vcpu, pgm_info->per_address, |
| (u64 *) __LC_PER_ADDRESS); |
| rc |= put_guest_lc(vcpu, pgm_info->per_access_id, |
| (u8 *) __LC_PER_ACCESS_ID); |
| } |
| |
| rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC); |
| rc |= put_guest_lc(vcpu, pgm_info->code, |
| (u16 *)__LC_PGM_INT_CODE); |
| rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW, |
| &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
| rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW, |
| &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
| |
| return rc; |
| } |
| |
| static int __must_check __do_deliver_interrupt(struct kvm_vcpu *vcpu, |
| struct kvm_s390_interrupt_info *inti) |
| { |
| const unsigned short table[] = { 2, 4, 4, 6 }; |
| int rc = 0; |
| |
| switch (inti->type) { |
| case KVM_S390_INT_EMERGENCY: |
| VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg"); |
| vcpu->stat.deliver_emergency_signal++; |
| trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
| inti->emerg.code, 0); |
| rc = put_guest_lc(vcpu, 0x1201, (u16 *)__LC_EXT_INT_CODE); |
| rc |= put_guest_lc(vcpu, inti->emerg.code, |
| (u16 *)__LC_EXT_CPU_ADDR); |
| rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
| &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
| rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, |
| &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
| break; |
| case KVM_S390_INT_EXTERNAL_CALL: |
| VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call"); |
| vcpu->stat.deliver_external_call++; |
| trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
| inti->extcall.code, 0); |
| rc = put_guest_lc(vcpu, 0x1202, (u16 *)__LC_EXT_INT_CODE); |
| rc |= put_guest_lc(vcpu, inti->extcall.code, |
| (u16 *)__LC_EXT_CPU_ADDR); |
| rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
| &vcpu->arch.sie_block->gpsw, |
| sizeof(psw_t)); |
| rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, |
| &vcpu->arch.sie_block->gpsw, |
| sizeof(psw_t)); |
| break; |
| case KVM_S390_INT_CLOCK_COMP: |
| trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
| inti->ext.ext_params, 0); |
| rc = deliver_ckc_interrupt(vcpu); |
| break; |
| case KVM_S390_INT_CPU_TIMER: |
| trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
| inti->ext.ext_params, 0); |
| rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER, |
| (u16 *)__LC_EXT_INT_CODE); |
| rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
| &vcpu->arch.sie_block->gpsw, |
| sizeof(psw_t)); |
| rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, |
| &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
| rc |= put_guest_lc(vcpu, inti->ext.ext_params, |
| (u32 *)__LC_EXT_PARAMS); |
| break; |
| case KVM_S390_INT_SERVICE: |
| VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x", |
| inti->ext.ext_params); |
| vcpu->stat.deliver_service_signal++; |
| trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
| inti->ext.ext_params, 0); |
| rc = put_guest_lc(vcpu, 0x2401, (u16 *)__LC_EXT_INT_CODE); |
| rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
| &vcpu->arch.sie_block->gpsw, |
| sizeof(psw_t)); |
| rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, |
| &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
| rc |= put_guest_lc(vcpu, inti->ext.ext_params, |
| (u32 *)__LC_EXT_PARAMS); |
| break; |
| case KVM_S390_INT_PFAULT_INIT: |
| trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, 0, |
| inti->ext.ext_params2); |
| rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, |
| (u16 *) __LC_EXT_INT_CODE); |
| rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR); |
| rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
| &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
| rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, |
| &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
| rc |= put_guest_lc(vcpu, inti->ext.ext_params2, |
| (u64 *) __LC_EXT_PARAMS2); |
| break; |
| case KVM_S390_INT_PFAULT_DONE: |
| trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, 0, |
| inti->ext.ext_params2); |
| rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE); |
| rc |= put_guest_lc(vcpu, 0x0680, (u16 *)__LC_EXT_CPU_ADDR); |
| rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
| &vcpu->arch.sie_block->gpsw, |
| sizeof(psw_t)); |
| rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, |
| &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
| rc |= put_guest_lc(vcpu, inti->ext.ext_params2, |
| (u64 *)__LC_EXT_PARAMS2); |
| break; |
| case KVM_S390_INT_VIRTIO: |
| VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx", |
| inti->ext.ext_params, inti->ext.ext_params2); |
| vcpu->stat.deliver_virtio_interrupt++; |
| trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
| inti->ext.ext_params, |
| inti->ext.ext_params2); |
| rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE); |
| rc |= put_guest_lc(vcpu, 0x0d00, (u16 *)__LC_EXT_CPU_ADDR); |
| rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
| &vcpu->arch.sie_block->gpsw, |
| sizeof(psw_t)); |
| rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, |
| &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
| rc |= put_guest_lc(vcpu, inti->ext.ext_params, |
| (u32 *)__LC_EXT_PARAMS); |
| rc |= put_guest_lc(vcpu, inti->ext.ext_params2, |
| (u64 *)__LC_EXT_PARAMS2); |
| break; |
| case KVM_S390_SIGP_STOP: |
| VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop"); |
| vcpu->stat.deliver_stop_signal++; |
| trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
| 0, 0); |
| __set_intercept_indicator(vcpu, inti); |
| break; |
| |
| case KVM_S390_SIGP_SET_PREFIX: |
| VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", |
| inti->prefix.address); |
| vcpu->stat.deliver_prefix_signal++; |
| trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
| inti->prefix.address, 0); |
| kvm_s390_set_prefix(vcpu, inti->prefix.address); |
| break; |
| |
| case KVM_S390_RESTART: |
| VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart"); |
| vcpu->stat.deliver_restart_signal++; |
| trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
| 0, 0); |
| rc = write_guest_lc(vcpu, |
| offsetof(struct _lowcore, restart_old_psw), |
| &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
| rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw), |
| &vcpu->arch.sie_block->gpsw, |
| sizeof(psw_t)); |
| break; |
| case KVM_S390_PROGRAM_INT: |
| VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x", |
| inti->pgm.code, |
| table[vcpu->arch.sie_block->ipa >> 14]); |
| vcpu->stat.deliver_program_int++; |
| trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
| inti->pgm.code, 0); |
| rc = __deliver_prog_irq(vcpu, &inti->pgm); |
| break; |
| |
| case KVM_S390_MCHK: |
| VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx", |
| inti->mchk.mcic); |
| trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
| inti->mchk.cr14, |
| inti->mchk.mcic); |
| rc = kvm_s390_vcpu_store_status(vcpu, |
| KVM_S390_STORE_STATUS_PREFIXED); |
| rc |= put_guest_lc(vcpu, inti->mchk.mcic, (u64 *)__LC_MCCK_CODE); |
| rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW, |
| &vcpu->arch.sie_block->gpsw, |
| sizeof(psw_t)); |
| rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW, |
| &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
| break; |
| |
| case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
| { |
| __u32 param0 = ((__u32)inti->io.subchannel_id << 16) | |
| inti->io.subchannel_nr; |
| __u64 param1 = ((__u64)inti->io.io_int_parm << 32) | |
| inti->io.io_int_word; |
| VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type); |
| vcpu->stat.deliver_io_int++; |
| trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
| param0, param1); |
| rc = put_guest_lc(vcpu, inti->io.subchannel_id, |
| (u16 *)__LC_SUBCHANNEL_ID); |
| rc |= put_guest_lc(vcpu, inti->io.subchannel_nr, |
| (u16 *)__LC_SUBCHANNEL_NR); |
| rc |= put_guest_lc(vcpu, inti->io.io_int_parm, |
| (u32 *)__LC_IO_INT_PARM); |
| rc |= put_guest_lc(vcpu, inti->io.io_int_word, |
| (u32 *)__LC_IO_INT_WORD); |
| rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW, |
| &vcpu->arch.sie_block->gpsw, |
| sizeof(psw_t)); |
| rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW, |
| &vcpu->arch.sie_block->gpsw, |
| sizeof(psw_t)); |
| break; |
| } |
| default: |
| BUG(); |
| } |
| |
| return rc; |
| } |
| |
| static int __must_check deliver_ckc_interrupt(struct kvm_vcpu *vcpu) |
| { |
| int rc; |
| |
| rc = put_guest_lc(vcpu, 0x1004, (u16 __user *)__LC_EXT_INT_CODE); |
| rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
| &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
| rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, |
| &vcpu->arch.sie_block->gpsw, |
| sizeof(psw_t)); |
| return rc; |
| } |
| |
| /* Check whether SIGP interpretation facility has an external call pending */ |
| int kvm_s390_si_ext_call_pending(struct kvm_vcpu *vcpu) |
| { |
| atomic_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl; |
| |
| if (!psw_extint_disabled(vcpu) && |
| (vcpu->arch.sie_block->gcr[0] & 0x2000ul) && |
| (atomic_read(sigp_ctrl) & SIGP_CTRL_C) && |
| (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND)) |
| return 1; |
| |
| return 0; |
| } |
| |
| int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu) |
| { |
| struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
| struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; |
| struct kvm_s390_interrupt_info *inti; |
| int rc = 0; |
| |
| if (atomic_read(&li->active)) { |
| spin_lock(&li->lock); |
| list_for_each_entry(inti, &li->list, list) |
| if (__interrupt_is_deliverable(vcpu, inti)) { |
| rc = 1; |
| break; |
| } |
| spin_unlock(&li->lock); |
| } |
| |
| if ((!rc) && atomic_read(&fi->active)) { |
| spin_lock(&fi->lock); |
| list_for_each_entry(inti, &fi->list, list) |
| if (__interrupt_is_deliverable(vcpu, inti)) { |
| rc = 1; |
| break; |
| } |
| spin_unlock(&fi->lock); |
| } |
| |
| if (!rc && kvm_cpu_has_pending_timer(vcpu)) |
| rc = 1; |
| |
| if (!rc && kvm_s390_si_ext_call_pending(vcpu)) |
| rc = 1; |
| |
| return rc; |
| } |
| |
| int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
| { |
| if (!(vcpu->arch.sie_block->ckc < |
| get_tod_clock_fast() + vcpu->arch.sie_block->epoch)) |
| return 0; |
| if (!ckc_interrupts_enabled(vcpu)) |
| return 0; |
| return 1; |
| } |
| |
| int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) |
| { |
| u64 now, sltime; |
| |
| vcpu->stat.exit_wait_state++; |
| |
| /* fast path */ |
| if (kvm_cpu_has_pending_timer(vcpu) || kvm_arch_vcpu_runnable(vcpu)) |
| return 0; |
| |
| if (psw_interrupts_disabled(vcpu)) { |
| VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); |
| return -EOPNOTSUPP; /* disabled wait */ |
| } |
| |
| __set_cpu_idle(vcpu); |
| if (!ckc_interrupts_enabled(vcpu)) { |
| VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); |
| goto no_timer; |
| } |
| |
| now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch; |
| sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now); |
| hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL); |
| VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime); |
| no_timer: |
| srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
| kvm_vcpu_block(vcpu); |
| __unset_cpu_idle(vcpu); |
| vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
| |
| hrtimer_try_to_cancel(&vcpu->arch.ckc_timer); |
| return 0; |
| } |
| |
| void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu) |
| { |
| if (waitqueue_active(&vcpu->wq)) { |
| /* |
| * The vcpu gave up the cpu voluntarily, mark it as a good |
| * yield-candidate. |
| */ |
| vcpu->preempted = true; |
| wake_up_interruptible(&vcpu->wq); |
| } |
| } |
| |
| enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer) |
| { |
| struct kvm_vcpu *vcpu; |
| |
| vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer); |
| kvm_s390_vcpu_wakeup(vcpu); |
| |
| return HRTIMER_NORESTART; |
| } |
| |
| void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu) |
| { |
| struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
| struct kvm_s390_interrupt_info *n, *inti = NULL; |
| |
| spin_lock(&li->lock); |
| list_for_each_entry_safe(inti, n, &li->list, list) { |
| list_del(&inti->list); |
| kfree(inti); |
| } |
| atomic_set(&li->active, 0); |
| spin_unlock(&li->lock); |
| |
| /* clear pending external calls set by sigp interpretation facility */ |
| atomic_clear_mask(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags); |
| atomic_clear_mask(SIGP_CTRL_C, |
| &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl); |
| } |
| |
| int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) |
| { |
| struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
| struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; |
| struct kvm_s390_interrupt_info *n, *inti = NULL; |
| int deliver; |
| int rc = 0; |
| |
| __reset_intercept_indicators(vcpu); |
| if (atomic_read(&li->active)) { |
| do { |
| deliver = 0; |
| spin_lock(&li->lock); |
| list_for_each_entry_safe(inti, n, &li->list, list) { |
| if (__interrupt_is_deliverable(vcpu, inti)) { |
| list_del(&inti->list); |
| deliver = 1; |
| break; |
| } |
| __set_intercept_indicator(vcpu, inti); |
| } |
| if (list_empty(&li->list)) |
| atomic_set(&li->active, 0); |
| spin_unlock(&li->lock); |
| if (deliver) { |
| rc = __do_deliver_interrupt(vcpu, inti); |
| kfree(inti); |
| } |
| } while (!rc && deliver); |
| } |
| |
| if (!rc && kvm_cpu_has_pending_timer(vcpu)) |
| rc = deliver_ckc_interrupt(vcpu); |
| |
| if (!rc && atomic_read(&fi->active)) { |
| do { |
| deliver = 0; |
| spin_lock(&fi->lock); |
| list_for_each_entry_safe(inti, n, &fi->list, list) { |
| if (__interrupt_is_deliverable(vcpu, inti)) { |
| list_del(&inti->list); |
| fi->irq_count--; |
| deliver = 1; |
| break; |
| } |
| __set_intercept_indicator(vcpu, inti); |
| } |
| if (list_empty(&fi->list)) |
| atomic_set(&fi->active, 0); |
| spin_unlock(&fi->lock); |
| if (deliver) { |
| rc = __do_deliver_interrupt(vcpu, inti); |
| kfree(inti); |
| } |
| } while (!rc && deliver); |
| } |
| |
| return rc; |
| } |
| |
| int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) |
| { |
| struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
| struct kvm_s390_interrupt_info *inti; |
| |
| inti = kzalloc(sizeof(*inti), GFP_KERNEL); |
| if (!inti) |
| return -ENOMEM; |
| |
| inti->type = KVM_S390_PROGRAM_INT; |
| inti->pgm.code = code; |
| |
| VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code); |
| trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, inti->type, code, 0, 1); |
| spin_lock(&li->lock); |
| list_add(&inti->list, &li->list); |
| atomic_set(&li->active, 1); |
| BUG_ON(waitqueue_active(li->wq)); |
| spin_unlock(&li->lock); |
| return 0; |
| } |
| |
| int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, |
| struct kvm_s390_pgm_info *pgm_info) |
| { |
| struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
| struct kvm_s390_interrupt_info *inti; |
| |
| inti = kzalloc(sizeof(*inti), GFP_KERNEL); |
| if (!inti) |
| return -ENOMEM; |
| |
| VCPU_EVENT(vcpu, 3, "inject: prog irq %d (from kernel)", |
| pgm_info->code); |
| trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, |
| pgm_info->code, 0, 1); |
| |
| inti->type = KVM_S390_PROGRAM_INT; |
| memcpy(&inti->pgm, pgm_info, sizeof(inti->pgm)); |
| spin_lock(&li->lock); |
| list_add(&inti->list, &li->list); |
| atomic_set(&li->active, 1); |
| BUG_ON(waitqueue_active(li->wq)); |
| spin_unlock(&li->lock); |
| return 0; |
| } |
| |
| struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, |
| u64 cr6, u64 schid) |
| { |
| struct kvm_s390_float_interrupt *fi; |
| struct kvm_s390_interrupt_info *inti, *iter; |
| |
| if ((!schid && !cr6) || (schid && cr6)) |
| return NULL; |
| mutex_lock(&kvm->lock); |
| fi = &kvm->arch.float_int; |
| spin_lock(&fi->lock); |
| inti = NULL; |
| list_for_each_entry(iter, &fi->list, list) { |
| if (!is_ioint(iter->type)) |
| continue; |
| if (cr6 && |
| ((cr6 & int_word_to_isc_bits(iter->io.io_int_word)) == 0)) |
| continue; |
| if (schid) { |
| if (((schid & 0x00000000ffff0000) >> 16) != |
| iter->io.subchannel_id) |
| continue; |
| if ((schid & 0x000000000000ffff) != |
| iter->io.subchannel_nr) |
| continue; |
| } |
| inti = iter; |
| break; |
| } |
| if (inti) { |
| list_del_init(&inti->list); |
| fi->irq_count--; |
| } |
| if (list_empty(&fi->list)) |
| atomic_set(&fi->active, 0); |
| spin_unlock(&fi->lock); |
| mutex_unlock(&kvm->lock); |
| return inti; |
| } |
| |
| static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) |
| { |
| struct kvm_s390_local_interrupt *li; |
| struct kvm_s390_float_interrupt *fi; |
| struct kvm_s390_interrupt_info *iter; |
| struct kvm_vcpu *dst_vcpu = NULL; |
| int sigcpu; |
| int rc = 0; |
| |
| mutex_lock(&kvm->lock); |
| fi = &kvm->arch.float_int; |
| spin_lock(&fi->lock); |
| if (fi->irq_count >= KVM_S390_MAX_FLOAT_IRQS) { |
| rc = -EINVAL; |
| goto unlock_fi; |
| } |
| fi->irq_count++; |
| if (!is_ioint(inti->type)) { |
| list_add_tail(&inti->list, &fi->list); |
| } else { |
| u64 isc_bits = int_word_to_isc_bits(inti->io.io_int_word); |
| |
| /* Keep I/O interrupts sorted in isc order. */ |
| list_for_each_entry(iter, &fi->list, list) { |
| if (!is_ioint(iter->type)) |
| continue; |
| if (int_word_to_isc_bits(iter->io.io_int_word) |
| <= isc_bits) |
| continue; |
| break; |
| } |
| list_add_tail(&inti->list, &iter->list); |
| } |
| atomic_set(&fi->active, 1); |
| sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS); |
| if (sigcpu == KVM_MAX_VCPUS) { |
| do { |
| sigcpu = fi->next_rr_cpu++; |
| if (sigcpu == KVM_MAX_VCPUS) |
| sigcpu = fi->next_rr_cpu = 0; |
| } while (kvm_get_vcpu(kvm, sigcpu) == NULL); |
| } |
| dst_vcpu = kvm_get_vcpu(kvm, sigcpu); |
| li = &dst_vcpu->arch.local_int; |
| spin_lock(&li->lock); |
| atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); |
| spin_unlock(&li->lock); |
| kvm_s390_vcpu_wakeup(kvm_get_vcpu(kvm, sigcpu)); |
| unlock_fi: |
| spin_unlock(&fi->lock); |
| mutex_unlock(&kvm->lock); |
| return rc; |
| } |
| |
| int kvm_s390_inject_vm(struct kvm *kvm, |
| struct kvm_s390_interrupt *s390int) |
| { |
| struct kvm_s390_interrupt_info *inti; |
| |
| inti = kzalloc(sizeof(*inti), GFP_KERNEL); |
| if (!inti) |
| return -ENOMEM; |
| |
| inti->type = s390int->type; |
| switch (inti->type) { |
| case KVM_S390_INT_VIRTIO: |
| VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx", |
| s390int->parm, s390int->parm64); |
| inti->ext.ext_params = s390int->parm; |
| inti->ext.ext_params2 = s390int->parm64; |
| break; |
| case KVM_S390_INT_SERVICE: |
| VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm); |
| inti->ext.ext_params = s390int->parm; |
| break; |
| case KVM_S390_INT_PFAULT_DONE: |
| inti->type = s390int->type; |
| inti->ext.ext_params2 = s390int->parm64; |
| break; |
| case KVM_S390_MCHK: |
| VM_EVENT(kvm, 5, "inject: machine check parm64:%llx", |
| s390int->parm64); |
| inti->mchk.cr14 = s390int->parm; /* upper bits are not used */ |
| inti->mchk.mcic = s390int->parm64; |
| break; |
| case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
| if (inti->type & IOINT_AI_MASK) |
| VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)"); |
| else |
| VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x", |
| s390int->type & IOINT_CSSID_MASK, |
| s390int->type & IOINT_SSID_MASK, |
| s390int->type & IOINT_SCHID_MASK); |
| inti->io.subchannel_id = s390int->parm >> 16; |
| inti->io.subchannel_nr = s390int->parm & 0x0000ffffu; |
| inti->io.io_int_parm = s390int->parm64 >> 32; |
| inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull; |
| break; |
| default: |
| kfree(inti); |
| return -EINVAL; |
| } |
| trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64, |
| 2); |
| |
| return __inject_vm(kvm, inti); |
| } |
| |
| void kvm_s390_reinject_io_int(struct kvm *kvm, |
| struct kvm_s390_interrupt_info *inti) |
| { |
| __inject_vm(kvm, inti); |
| } |
| |
| int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, |
| struct kvm_s390_interrupt *s390int) |
| { |
| struct kvm_s390_local_interrupt *li; |
| struct kvm_s390_interrupt_info *inti; |
| |
| inti = kzalloc(sizeof(*inti), GFP_KERNEL); |
| if (!inti) |
| return -ENOMEM; |
| |
| switch (s390int->type) { |
| case KVM_S390_PROGRAM_INT: |
| if (s390int->parm & 0xffff0000) { |
| kfree(inti); |
| return -EINVAL; |
| } |
| inti->type = s390int->type; |
| inti->pgm.code = s390int->parm; |
| VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)", |
| s390int->parm); |
| break; |
| case KVM_S390_SIGP_SET_PREFIX: |
| inti->prefix.address = s390int->parm; |
| inti->type = s390int->type; |
| VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)", |
| s390int->parm); |
| break; |
| case KVM_S390_SIGP_STOP: |
| case KVM_S390_RESTART: |
| case KVM_S390_INT_CLOCK_COMP: |
| case KVM_S390_INT_CPU_TIMER: |
| VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type); |
| inti->type = s390int->type; |
| break; |
| case KVM_S390_INT_EXTERNAL_CALL: |
| if (s390int->parm & 0xffff0000) { |
| kfree(inti); |
| return -EINVAL; |
| } |
| VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u", |
| s390int->parm); |
| inti->type = s390int->type; |
| inti->extcall.code = s390int->parm; |
| break; |
| case KVM_S390_INT_EMERGENCY: |
| if (s390int->parm & 0xffff0000) { |
| kfree(inti); |
| return -EINVAL; |
| } |
| VCPU_EVENT(vcpu, 3, "inject: emergency %u\n", s390int->parm); |
| inti->type = s390int->type; |
| inti->emerg.code = s390int->parm; |
| break; |
| case KVM_S390_MCHK: |
| VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx", |
| s390int->parm64); |
| inti->type = s390int->type; |
| inti->mchk.mcic = s390int->parm64; |
| break; |
| case KVM_S390_INT_PFAULT_INIT: |
| inti->type = s390int->type; |
| inti->ext.ext_params2 = s390int->parm64; |
| break; |
| case KVM_S390_INT_VIRTIO: |
| case KVM_S390_INT_SERVICE: |
| case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
| default: |
| kfree(inti); |
| return -EINVAL; |
| } |
| trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, s390int->type, s390int->parm, |
| s390int->parm64, 2); |
| |
| li = &vcpu->arch.local_int; |
| spin_lock(&li->lock); |
| if (inti->type == KVM_S390_PROGRAM_INT) |
| list_add(&inti->list, &li->list); |
| else |
| list_add_tail(&inti->list, &li->list); |
| atomic_set(&li->active, 1); |
| if (inti->type == KVM_S390_SIGP_STOP) |
| li->action_bits |= ACTION_STOP_ON_STOP; |
| atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); |
| spin_unlock(&li->lock); |
| kvm_s390_vcpu_wakeup(vcpu); |
| return 0; |
| } |
| |
| void kvm_s390_clear_float_irqs(struct kvm *kvm) |
| { |
| struct kvm_s390_float_interrupt *fi; |
| struct kvm_s390_interrupt_info *n, *inti = NULL; |
| |
| mutex_lock(&kvm->lock); |
| fi = &kvm->arch.float_int; |
| spin_lock(&fi->lock); |
| list_for_each_entry_safe(inti, n, &fi->list, list) { |
| list_del(&inti->list); |
| kfree(inti); |
| } |
| fi->irq_count = 0; |
| atomic_set(&fi->active, 0); |
| spin_unlock(&fi->lock); |
| mutex_unlock(&kvm->lock); |
| } |
| |
| static inline int copy_irq_to_user(struct kvm_s390_interrupt_info *inti, |
| u8 *addr) |
| { |
| struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr; |
| struct kvm_s390_irq irq = {0}; |
| |
| irq.type = inti->type; |
| switch (inti->type) { |
| case KVM_S390_INT_PFAULT_INIT: |
| case KVM_S390_INT_PFAULT_DONE: |
| case KVM_S390_INT_VIRTIO: |
| case KVM_S390_INT_SERVICE: |
| irq.u.ext = inti->ext; |
| break; |
| case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
| irq.u.io = inti->io; |
| break; |
| case KVM_S390_MCHK: |
| irq.u.mchk = inti->mchk; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (copy_to_user(uptr, &irq, sizeof(irq))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| static int get_all_floating_irqs(struct kvm *kvm, __u8 *buf, __u64 len) |
| { |
| struct kvm_s390_interrupt_info *inti; |
| struct kvm_s390_float_interrupt *fi; |
| int ret = 0; |
| int n = 0; |
| |
| mutex_lock(&kvm->lock); |
| fi = &kvm->arch.float_int; |
| spin_lock(&fi->lock); |
| |
| list_for_each_entry(inti, &fi->list, list) { |
| if (len < sizeof(struct kvm_s390_irq)) { |
| /* signal userspace to try again */ |
| ret = -ENOMEM; |
| break; |
| } |
| ret = copy_irq_to_user(inti, buf); |
| if (ret) |
| break; |
| buf += sizeof(struct kvm_s390_irq); |
| len -= sizeof(struct kvm_s390_irq); |
| n++; |
| } |
| |
| spin_unlock(&fi->lock); |
| mutex_unlock(&kvm->lock); |
| |
| return ret < 0 ? ret : n; |
| } |
| |
| static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) |
| { |
| int r; |
| |
| switch (attr->group) { |
| case KVM_DEV_FLIC_GET_ALL_IRQS: |
| r = get_all_floating_irqs(dev->kvm, (u8 *) attr->addr, |
| attr->attr); |
| break; |
| default: |
| r = -EINVAL; |
| } |
| |
| return r; |
| } |
| |
| static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti, |
| u64 addr) |
| { |
| struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr; |
| void *target = NULL; |
| void __user *source; |
| u64 size; |
| |
| if (get_user(inti->type, (u64 __user *)addr)) |
| return -EFAULT; |
| |
| switch (inti->type) { |
| case KVM_S390_INT_PFAULT_INIT: |
| case KVM_S390_INT_PFAULT_DONE: |
| case KVM_S390_INT_VIRTIO: |
| case KVM_S390_INT_SERVICE: |
| target = (void *) &inti->ext; |
| source = &uptr->u.ext; |
| size = sizeof(inti->ext); |
| break; |
| case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
| target = (void *) &inti->io; |
| source = &uptr->u.io; |
| size = sizeof(inti->io); |
| break; |
| case KVM_S390_MCHK: |
| target = (void *) &inti->mchk; |
| source = &uptr->u.mchk; |
| size = sizeof(inti->mchk); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (copy_from_user(target, source, size)) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| static int enqueue_floating_irq(struct kvm_device *dev, |
| struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_interrupt_info *inti = NULL; |
| int r = 0; |
| int len = attr->attr; |
| |
| if (len % sizeof(struct kvm_s390_irq) != 0) |
| return -EINVAL; |
| else if (len > KVM_S390_FLIC_MAX_BUFFER) |
| return -EINVAL; |
| |
| while (len >= sizeof(struct kvm_s390_irq)) { |
| inti = kzalloc(sizeof(*inti), GFP_KERNEL); |
| if (!inti) |
| return -ENOMEM; |
| |
| r = copy_irq_from_user(inti, attr->addr); |
| if (r) { |
| kfree(inti); |
| return r; |
| } |
| r = __inject_vm(dev->kvm, inti); |
| if (r) { |
| kfree(inti); |
| return r; |
| } |
| len -= sizeof(struct kvm_s390_irq); |
| attr->addr += sizeof(struct kvm_s390_irq); |
| } |
| |
| return r; |
| } |
| |
| static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id) |
| { |
| if (id >= MAX_S390_IO_ADAPTERS) |
| return NULL; |
| return kvm->arch.adapters[id]; |
| } |
| |
| static int register_io_adapter(struct kvm_device *dev, |
| struct kvm_device_attr *attr) |
| { |
| struct s390_io_adapter *adapter; |
| struct kvm_s390_io_adapter adapter_info; |
| |
| if (copy_from_user(&adapter_info, |
| (void __user *)attr->addr, sizeof(adapter_info))) |
| return -EFAULT; |
| |
| if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) || |
| (dev->kvm->arch.adapters[adapter_info.id] != NULL)) |
| return -EINVAL; |
| |
| adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); |
| if (!adapter) |
| return -ENOMEM; |
| |
| INIT_LIST_HEAD(&adapter->maps); |
| init_rwsem(&adapter->maps_lock); |
| atomic_set(&adapter->nr_maps, 0); |
| adapter->id = adapter_info.id; |
| adapter->isc = adapter_info.isc; |
| adapter->maskable = adapter_info.maskable; |
| adapter->masked = false; |
| adapter->swap = adapter_info.swap; |
| dev->kvm->arch.adapters[adapter->id] = adapter; |
| |
| return 0; |
| } |
| |
| int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked) |
| { |
| int ret; |
| struct s390_io_adapter *adapter = get_io_adapter(kvm, id); |
| |
| if (!adapter || !adapter->maskable) |
| return -EINVAL; |
| ret = adapter->masked; |
| adapter->masked = masked; |
| return ret; |
| } |
| |
| static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr) |
| { |
| struct s390_io_adapter *adapter = get_io_adapter(kvm, id); |
| struct s390_map_info *map; |
| int ret; |
| |
| if (!adapter || !addr) |
| return -EINVAL; |
| |
| map = kzalloc(sizeof(*map), GFP_KERNEL); |
| if (!map) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| INIT_LIST_HEAD(&map->list); |
| map->guest_addr = addr; |
| map->addr = gmap_translate(kvm->arch.gmap, addr); |
| if (map->addr == -EFAULT) { |
| ret = -EFAULT; |
| goto out; |
| } |
| ret = get_user_pages_fast(map->addr, 1, 1, &map->page); |
| if (ret < 0) |
| goto out; |
| BUG_ON(ret != 1); |
| down_write(&adapter->maps_lock); |
| if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) { |
| list_add_tail(&map->list, &adapter->maps); |
| ret = 0; |
| } else { |
| put_page(map->page); |
| ret = -EINVAL; |
| } |
| up_write(&adapter->maps_lock); |
| out: |
| if (ret) |
| kfree(map); |
| return ret; |
| } |
| |
| static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr) |
| { |
| struct s390_io_adapter *adapter = get_io_adapter(kvm, id); |
| struct s390_map_info *map, *tmp; |
| int found = 0; |
| |
| if (!adapter || !addr) |
| return -EINVAL; |
| |
| down_write(&adapter->maps_lock); |
| list_for_each_entry_safe(map, tmp, &adapter->maps, list) { |
| if (map->guest_addr == addr) { |
| found = 1; |
| atomic_dec(&adapter->nr_maps); |
| list_del(&map->list); |
| put_page(map->page); |
| kfree(map); |
| break; |
| } |
| } |
| up_write(&adapter->maps_lock); |
| |
| return found ? 0 : -EINVAL; |
| } |
| |
| void kvm_s390_destroy_adapters(struct kvm *kvm) |
| { |
| int i; |
| struct s390_map_info *map, *tmp; |
| |
| for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) { |
| if (!kvm->arch.adapters[i]) |
| continue; |
| list_for_each_entry_safe(map, tmp, |
| &kvm->arch.adapters[i]->maps, list) { |
| list_del(&map->list); |
| put_page(map->page); |
| kfree(map); |
| } |
| kfree(kvm->arch.adapters[i]); |
| } |
| } |
| |
| static int modify_io_adapter(struct kvm_device *dev, |
| struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_io_adapter_req req; |
| struct s390_io_adapter *adapter; |
| int ret; |
| |
| if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req))) |
| return -EFAULT; |
| |
| adapter = get_io_adapter(dev->kvm, req.id); |
| if (!adapter) |
| return -EINVAL; |
| switch (req.type) { |
| case KVM_S390_IO_ADAPTER_MASK: |
| ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask); |
| if (ret > 0) |
| ret = 0; |
| break; |
| case KVM_S390_IO_ADAPTER_MAP: |
| ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr); |
| break; |
| case KVM_S390_IO_ADAPTER_UNMAP: |
| ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr); |
| break; |
| default: |
| ret = -EINVAL; |
| } |
| |
| return ret; |
| } |
| |
| static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) |
| { |
| int r = 0; |
| unsigned int i; |
| struct kvm_vcpu *vcpu; |
| |
| switch (attr->group) { |
| case KVM_DEV_FLIC_ENQUEUE: |
| r = enqueue_floating_irq(dev, attr); |
| break; |
| case KVM_DEV_FLIC_CLEAR_IRQS: |
| kvm_s390_clear_float_irqs(dev->kvm); |
| break; |
| case KVM_DEV_FLIC_APF_ENABLE: |
| dev->kvm->arch.gmap->pfault_enabled = 1; |
| break; |
| case KVM_DEV_FLIC_APF_DISABLE_WAIT: |
| dev->kvm->arch.gmap->pfault_enabled = 0; |
| /* |
| * Make sure no async faults are in transition when |
| * clearing the queues. So we don't need to worry |
| * about late coming workers. |
| */ |
| synchronize_srcu(&dev->kvm->srcu); |
| kvm_for_each_vcpu(i, vcpu, dev->kvm) |
| kvm_clear_async_pf_completion_queue(vcpu); |
| break; |
| case KVM_DEV_FLIC_ADAPTER_REGISTER: |
| r = register_io_adapter(dev, attr); |
| break; |
| case KVM_DEV_FLIC_ADAPTER_MODIFY: |
| r = modify_io_adapter(dev, attr); |
| break; |
| default: |
| r = -EINVAL; |
| } |
| |
| return r; |
| } |
| |
| static int flic_create(struct kvm_device *dev, u32 type) |
| { |
| if (!dev) |
| return -EINVAL; |
| if (dev->kvm->arch.flic) |
| return -EINVAL; |
| dev->kvm->arch.flic = dev; |
| return 0; |
| } |
| |
| static void flic_destroy(struct kvm_device *dev) |
| { |
| dev->kvm->arch.flic = NULL; |
| kfree(dev); |
| } |
| |
| /* s390 floating irq controller (flic) */ |
| struct kvm_device_ops kvm_flic_ops = { |
| .name = "kvm-flic", |
| .get_attr = flic_get_attr, |
| .set_attr = flic_set_attr, |
| .create = flic_create, |
| .destroy = flic_destroy, |
| }; |
| |
| static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap) |
| { |
| unsigned long bit; |
| |
| bit = bit_nr + (addr % PAGE_SIZE) * 8; |
| |
| return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit; |
| } |
| |
| static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter, |
| u64 addr) |
| { |
| struct s390_map_info *map; |
| |
| if (!adapter) |
| return NULL; |
| |
| list_for_each_entry(map, &adapter->maps, list) { |
| if (map->guest_addr == addr) |
| return map; |
| } |
| return NULL; |
| } |
| |
| static int adapter_indicators_set(struct kvm *kvm, |
| struct s390_io_adapter *adapter, |
| struct kvm_s390_adapter_int *adapter_int) |
| { |
| unsigned long bit; |
| int summary_set, idx; |
| struct s390_map_info *info; |
| void *map; |
| |
| info = get_map_info(adapter, adapter_int->ind_addr); |
| if (!info) |
| return -1; |
| map = page_address(info->page); |
| bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap); |
| set_bit(bit, map); |
| idx = srcu_read_lock(&kvm->srcu); |
| mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); |
| set_page_dirty_lock(info->page); |
| info = get_map_info(adapter, adapter_int->summary_addr); |
| if (!info) { |
| srcu_read_unlock(&kvm->srcu, idx); |
| return -1; |
| } |
| map = page_address(info->page); |
| bit = get_ind_bit(info->addr, adapter_int->summary_offset, |
| adapter->swap); |
| summary_set = test_and_set_bit(bit, map); |
| mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); |
| set_page_dirty_lock(info->page); |
| srcu_read_unlock(&kvm->srcu, idx); |
| return summary_set ? 0 : 1; |
| } |
| |
| /* |
| * < 0 - not injected due to error |
| * = 0 - coalesced, summary indicator already active |
| * > 0 - injected interrupt |
| */ |
| static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e, |
| struct kvm *kvm, int irq_source_id, int level, |
| bool line_status) |
| { |
| int ret; |
| struct s390_io_adapter *adapter; |
| |
| /* We're only interested in the 0->1 transition. */ |
| if (!level) |
| return 0; |
| adapter = get_io_adapter(kvm, e->adapter.adapter_id); |
| if (!adapter) |
| return -1; |
| down_read(&adapter->maps_lock); |
| ret = adapter_indicators_set(kvm, adapter, &e->adapter); |
| up_read(&adapter->maps_lock); |
| if ((ret > 0) && !adapter->masked) { |
| struct kvm_s390_interrupt s390int = { |
| .type = KVM_S390_INT_IO(1, 0, 0, 0), |
| .parm = 0, |
| .parm64 = (adapter->isc << 27) | 0x80000000, |
| }; |
| ret = kvm_s390_inject_vm(kvm, &s390int); |
| if (ret == 0) |
| ret = 1; |
| } |
| return ret; |
| } |
| |
| int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e, |
| const struct kvm_irq_routing_entry *ue) |
| { |
| int ret; |
| |
| switch (ue->type) { |
| case KVM_IRQ_ROUTING_S390_ADAPTER: |
| e->set = set_adapter_int; |
| e->adapter.summary_addr = ue->u.adapter.summary_addr; |
| e->adapter.ind_addr = ue->u.adapter.ind_addr; |
| e->adapter.summary_offset = ue->u.adapter.summary_offset; |
| e->adapter.ind_offset = ue->u.adapter.ind_offset; |
| e->adapter.adapter_id = ue->u.adapter.adapter_id; |
| ret = 0; |
| break; |
| default: |
| ret = -EINVAL; |
| } |
| |
| return ret; |
| } |
| |
| int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm, |
| int irq_source_id, int level, bool line_status) |
| { |
| return -EINVAL; |
| } |