841 lines
24 KiB
C
841 lines
24 KiB
C
/*
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* handling kvm guest interrupts
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*
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* Copyright IBM Corp. 2008
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License (version 2 only)
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* as published by the Free Software Foundation.
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*
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* Author(s): Carsten Otte <cotte@de.ibm.com>
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*/
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#include <linux/interrupt.h>
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#include <linux/kvm_host.h>
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#include <linux/hrtimer.h>
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#include <linux/signal.h>
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#include <linux/slab.h>
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#include <asm/asm-offsets.h>
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#include <asm/uaccess.h>
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#include "kvm-s390.h"
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#include "gaccess.h"
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#include "trace-s390.h"
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#define IOINT_SCHID_MASK 0x0000ffff
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#define IOINT_SSID_MASK 0x00030000
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#define IOINT_CSSID_MASK 0x03fc0000
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#define IOINT_AI_MASK 0x04000000
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static int is_ioint(u64 type)
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{
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return ((type & 0xfffe0000u) != 0xfffe0000u);
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}
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static int psw_extint_disabled(struct kvm_vcpu *vcpu)
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{
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return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
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}
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static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
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{
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return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
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}
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static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
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{
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return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
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}
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static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
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{
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if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) ||
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(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) ||
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(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT))
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return 0;
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return 1;
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}
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static u64 int_word_to_isc_bits(u32 int_word)
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{
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u8 isc = (int_word & 0x38000000) >> 27;
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return (0x80 >> isc) << 24;
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}
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static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
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struct kvm_s390_interrupt_info *inti)
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{
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switch (inti->type) {
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case KVM_S390_INT_EXTERNAL_CALL:
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if (psw_extint_disabled(vcpu))
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return 0;
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if (vcpu->arch.sie_block->gcr[0] & 0x2000ul)
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return 1;
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case KVM_S390_INT_EMERGENCY:
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if (psw_extint_disabled(vcpu))
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return 0;
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if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
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return 1;
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return 0;
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case KVM_S390_INT_SERVICE:
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if (psw_extint_disabled(vcpu))
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return 0;
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if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
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return 1;
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return 0;
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case KVM_S390_INT_VIRTIO:
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if (psw_extint_disabled(vcpu))
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return 0;
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if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
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return 1;
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return 0;
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case KVM_S390_PROGRAM_INT:
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case KVM_S390_SIGP_STOP:
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case KVM_S390_SIGP_SET_PREFIX:
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case KVM_S390_RESTART:
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return 1;
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case KVM_S390_MCHK:
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if (psw_mchk_disabled(vcpu))
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return 0;
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if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14)
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return 1;
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return 0;
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case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
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if (psw_ioint_disabled(vcpu))
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return 0;
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if (vcpu->arch.sie_block->gcr[6] &
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int_word_to_isc_bits(inti->io.io_int_word))
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return 1;
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return 0;
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default:
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printk(KERN_WARNING "illegal interrupt type %llx\n",
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inti->type);
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BUG();
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}
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return 0;
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}
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static void __set_cpu_idle(struct kvm_vcpu *vcpu)
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{
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BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1);
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atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
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set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
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}
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static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
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{
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BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1);
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atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
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clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
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}
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static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
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{
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atomic_clear_mask(CPUSTAT_ECALL_PEND |
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CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
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&vcpu->arch.sie_block->cpuflags);
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vcpu->arch.sie_block->lctl = 0x0000;
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vcpu->arch.sie_block->ictl &= ~ICTL_LPSW;
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}
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static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
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{
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atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
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}
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static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
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struct kvm_s390_interrupt_info *inti)
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{
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switch (inti->type) {
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case KVM_S390_INT_EXTERNAL_CALL:
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case KVM_S390_INT_EMERGENCY:
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case KVM_S390_INT_SERVICE:
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case KVM_S390_INT_VIRTIO:
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if (psw_extint_disabled(vcpu))
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__set_cpuflag(vcpu, CPUSTAT_EXT_INT);
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else
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vcpu->arch.sie_block->lctl |= LCTL_CR0;
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break;
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case KVM_S390_SIGP_STOP:
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__set_cpuflag(vcpu, CPUSTAT_STOP_INT);
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break;
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case KVM_S390_MCHK:
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if (psw_mchk_disabled(vcpu))
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vcpu->arch.sie_block->ictl |= ICTL_LPSW;
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else
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vcpu->arch.sie_block->lctl |= LCTL_CR14;
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break;
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case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
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if (psw_ioint_disabled(vcpu))
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__set_cpuflag(vcpu, CPUSTAT_IO_INT);
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else
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vcpu->arch.sie_block->lctl |= LCTL_CR6;
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break;
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default:
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BUG();
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}
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}
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static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
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struct kvm_s390_interrupt_info *inti)
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{
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const unsigned short table[] = { 2, 4, 4, 6 };
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int rc = 0;
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switch (inti->type) {
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case KVM_S390_INT_EMERGENCY:
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VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg");
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vcpu->stat.deliver_emergency_signal++;
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trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
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inti->emerg.code, 0);
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rc = put_guest(vcpu, 0x1201, (u16 __user *)__LC_EXT_INT_CODE);
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rc |= put_guest(vcpu, inti->emerg.code,
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(u16 __user *)__LC_EXT_CPU_ADDR);
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rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
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&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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__LC_EXT_NEW_PSW, sizeof(psw_t));
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break;
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case KVM_S390_INT_EXTERNAL_CALL:
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VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call");
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vcpu->stat.deliver_external_call++;
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trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
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inti->extcall.code, 0);
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rc = put_guest(vcpu, 0x1202, (u16 __user *)__LC_EXT_INT_CODE);
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rc |= put_guest(vcpu, inti->extcall.code,
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(u16 __user *)__LC_EXT_CPU_ADDR);
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rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
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&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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__LC_EXT_NEW_PSW, sizeof(psw_t));
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break;
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case KVM_S390_INT_SERVICE:
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VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x",
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inti->ext.ext_params);
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vcpu->stat.deliver_service_signal++;
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trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
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inti->ext.ext_params, 0);
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rc = put_guest(vcpu, 0x2401, (u16 __user *)__LC_EXT_INT_CODE);
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rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
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&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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__LC_EXT_NEW_PSW, sizeof(psw_t));
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rc |= put_guest(vcpu, inti->ext.ext_params,
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(u32 __user *)__LC_EXT_PARAMS);
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break;
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case KVM_S390_INT_VIRTIO:
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VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx",
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inti->ext.ext_params, inti->ext.ext_params2);
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vcpu->stat.deliver_virtio_interrupt++;
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trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
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inti->ext.ext_params,
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inti->ext.ext_params2);
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rc = put_guest(vcpu, 0x2603, (u16 __user *)__LC_EXT_INT_CODE);
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rc |= put_guest(vcpu, 0x0d00, (u16 __user *)__LC_EXT_CPU_ADDR);
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rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
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&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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__LC_EXT_NEW_PSW, sizeof(psw_t));
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rc |= put_guest(vcpu, inti->ext.ext_params,
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(u32 __user *)__LC_EXT_PARAMS);
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rc |= put_guest(vcpu, inti->ext.ext_params2,
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(u64 __user *)__LC_EXT_PARAMS2);
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break;
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case KVM_S390_SIGP_STOP:
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VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop");
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vcpu->stat.deliver_stop_signal++;
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trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
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0, 0);
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__set_intercept_indicator(vcpu, inti);
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break;
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case KVM_S390_SIGP_SET_PREFIX:
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VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x",
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inti->prefix.address);
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vcpu->stat.deliver_prefix_signal++;
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trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
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inti->prefix.address, 0);
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kvm_s390_set_prefix(vcpu, inti->prefix.address);
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break;
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case KVM_S390_RESTART:
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VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart");
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vcpu->stat.deliver_restart_signal++;
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trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
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0, 0);
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rc = copy_to_guest(vcpu,
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offsetof(struct _lowcore, restart_old_psw),
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&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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offsetof(struct _lowcore, restart_psw),
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sizeof(psw_t));
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atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
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break;
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case KVM_S390_PROGRAM_INT:
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VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x",
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inti->pgm.code,
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table[vcpu->arch.sie_block->ipa >> 14]);
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vcpu->stat.deliver_program_int++;
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trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
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inti->pgm.code, 0);
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rc = put_guest(vcpu, inti->pgm.code, (u16 __user *)__LC_PGM_INT_CODE);
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rc |= put_guest(vcpu, table[vcpu->arch.sie_block->ipa >> 14],
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(u16 __user *)__LC_PGM_ILC);
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rc |= copy_to_guest(vcpu, __LC_PGM_OLD_PSW,
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&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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__LC_PGM_NEW_PSW, sizeof(psw_t));
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break;
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case KVM_S390_MCHK:
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VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
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inti->mchk.mcic);
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trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
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inti->mchk.cr14,
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inti->mchk.mcic);
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rc = kvm_s390_vcpu_store_status(vcpu,
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KVM_S390_STORE_STATUS_PREFIXED);
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rc |= put_guest(vcpu, inti->mchk.mcic, (u64 __user *) __LC_MCCK_CODE);
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rc |= copy_to_guest(vcpu, __LC_MCK_OLD_PSW,
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&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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__LC_MCK_NEW_PSW, sizeof(psw_t));
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break;
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case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
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{
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__u32 param0 = ((__u32)inti->io.subchannel_id << 16) |
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inti->io.subchannel_nr;
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__u64 param1 = ((__u64)inti->io.io_int_parm << 32) |
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inti->io.io_int_word;
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VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type);
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vcpu->stat.deliver_io_int++;
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trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
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param0, param1);
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rc = put_guest(vcpu, inti->io.subchannel_id,
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(u16 __user *) __LC_SUBCHANNEL_ID);
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rc |= put_guest(vcpu, inti->io.subchannel_nr,
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(u16 __user *) __LC_SUBCHANNEL_NR);
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rc |= put_guest(vcpu, inti->io.io_int_parm,
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(u32 __user *) __LC_IO_INT_PARM);
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rc |= put_guest(vcpu, inti->io.io_int_word,
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(u32 __user *) __LC_IO_INT_WORD);
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rc |= copy_to_guest(vcpu, __LC_IO_OLD_PSW,
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&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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__LC_IO_NEW_PSW, sizeof(psw_t));
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break;
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}
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default:
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BUG();
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}
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if (rc) {
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printk("kvm: The guest lowcore is not mapped during interrupt "
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"delivery, killing userspace\n");
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do_exit(SIGKILL);
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}
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}
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static int __try_deliver_ckc_interrupt(struct kvm_vcpu *vcpu)
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{
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int rc;
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if (psw_extint_disabled(vcpu))
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return 0;
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if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
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return 0;
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rc = put_guest(vcpu, 0x1004, (u16 __user *)__LC_EXT_INT_CODE);
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rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
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&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
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rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
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__LC_EXT_NEW_PSW, sizeof(psw_t));
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if (rc) {
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printk("kvm: The guest lowcore is not mapped during interrupt "
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"delivery, killing userspace\n");
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do_exit(SIGKILL);
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}
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return 1;
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}
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static int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
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{
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struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
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struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
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struct kvm_s390_interrupt_info *inti;
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int rc = 0;
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if (atomic_read(&li->active)) {
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spin_lock_bh(&li->lock);
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list_for_each_entry(inti, &li->list, list)
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if (__interrupt_is_deliverable(vcpu, inti)) {
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rc = 1;
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break;
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}
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spin_unlock_bh(&li->lock);
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}
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if ((!rc) && atomic_read(&fi->active)) {
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spin_lock(&fi->lock);
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list_for_each_entry(inti, &fi->list, list)
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if (__interrupt_is_deliverable(vcpu, inti)) {
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rc = 1;
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break;
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}
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spin_unlock(&fi->lock);
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}
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if ((!rc) && (vcpu->arch.sie_block->ckc <
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get_tod_clock() + vcpu->arch.sie_block->epoch)) {
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if ((!psw_extint_disabled(vcpu)) &&
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(vcpu->arch.sie_block->gcr[0] & 0x800ul))
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rc = 1;
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}
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return rc;
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}
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int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
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{
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return 0;
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}
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int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
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{
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u64 now, sltime;
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DECLARE_WAITQUEUE(wait, current);
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vcpu->stat.exit_wait_state++;
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if (kvm_cpu_has_interrupt(vcpu))
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return 0;
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__set_cpu_idle(vcpu);
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spin_lock_bh(&vcpu->arch.local_int.lock);
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vcpu->arch.local_int.timer_due = 0;
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spin_unlock_bh(&vcpu->arch.local_int.lock);
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|
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if (psw_interrupts_disabled(vcpu)) {
|
|
VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
|
|
__unset_cpu_idle(vcpu);
|
|
return -EOPNOTSUPP; /* disabled wait */
|
|
}
|
|
|
|
if (psw_extint_disabled(vcpu) ||
|
|
(!(vcpu->arch.sie_block->gcr[0] & 0x800ul))) {
|
|
VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
|
|
goto no_timer;
|
|
}
|
|
|
|
now = get_tod_clock() + vcpu->arch.sie_block->epoch;
|
|
if (vcpu->arch.sie_block->ckc < now) {
|
|
__unset_cpu_idle(vcpu);
|
|
return 0;
|
|
}
|
|
|
|
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:
|
|
spin_lock(&vcpu->arch.local_int.float_int->lock);
|
|
spin_lock_bh(&vcpu->arch.local_int.lock);
|
|
add_wait_queue(&vcpu->arch.local_int.wq, &wait);
|
|
while (list_empty(&vcpu->arch.local_int.list) &&
|
|
list_empty(&vcpu->arch.local_int.float_int->list) &&
|
|
(!vcpu->arch.local_int.timer_due) &&
|
|
!signal_pending(current)) {
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
spin_unlock_bh(&vcpu->arch.local_int.lock);
|
|
spin_unlock(&vcpu->arch.local_int.float_int->lock);
|
|
schedule();
|
|
spin_lock(&vcpu->arch.local_int.float_int->lock);
|
|
spin_lock_bh(&vcpu->arch.local_int.lock);
|
|
}
|
|
__unset_cpu_idle(vcpu);
|
|
__set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&vcpu->arch.local_int.wq, &wait);
|
|
spin_unlock_bh(&vcpu->arch.local_int.lock);
|
|
spin_unlock(&vcpu->arch.local_int.float_int->lock);
|
|
hrtimer_try_to_cancel(&vcpu->arch.ckc_timer);
|
|
return 0;
|
|
}
|
|
|
|
void kvm_s390_tasklet(unsigned long parm)
|
|
{
|
|
struct kvm_vcpu *vcpu = (struct kvm_vcpu *) parm;
|
|
|
|
spin_lock(&vcpu->arch.local_int.lock);
|
|
vcpu->arch.local_int.timer_due = 1;
|
|
if (waitqueue_active(&vcpu->arch.local_int.wq))
|
|
wake_up_interruptible(&vcpu->arch.local_int.wq);
|
|
spin_unlock(&vcpu->arch.local_int.lock);
|
|
}
|
|
|
|
/*
|
|
* low level hrtimer wake routine. Because this runs in hardirq context
|
|
* we schedule a tasklet to do the real work.
|
|
*/
|
|
enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
|
|
{
|
|
struct kvm_vcpu *vcpu;
|
|
|
|
vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
|
|
tasklet_schedule(&vcpu->arch.tasklet);
|
|
|
|
return HRTIMER_NORESTART;
|
|
}
|
|
|
|
void 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;
|
|
|
|
__reset_intercept_indicators(vcpu);
|
|
if (atomic_read(&li->active)) {
|
|
do {
|
|
deliver = 0;
|
|
spin_lock_bh(&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_bh(&li->lock);
|
|
if (deliver) {
|
|
__do_deliver_interrupt(vcpu, inti);
|
|
kfree(inti);
|
|
}
|
|
} while (deliver);
|
|
}
|
|
|
|
if ((vcpu->arch.sie_block->ckc <
|
|
get_tod_clock() + vcpu->arch.sie_block->epoch))
|
|
__try_deliver_ckc_interrupt(vcpu);
|
|
|
|
if (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);
|
|
deliver = 1;
|
|
break;
|
|
}
|
|
__set_intercept_indicator(vcpu, inti);
|
|
}
|
|
if (list_empty(&fi->list))
|
|
atomic_set(&fi->active, 0);
|
|
spin_unlock(&fi->lock);
|
|
if (deliver) {
|
|
__do_deliver_interrupt(vcpu, inti);
|
|
kfree(inti);
|
|
}
|
|
} while (deliver);
|
|
}
|
|
}
|
|
|
|
void kvm_s390_deliver_pending_machine_checks(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;
|
|
|
|
__reset_intercept_indicators(vcpu);
|
|
if (atomic_read(&li->active)) {
|
|
do {
|
|
deliver = 0;
|
|
spin_lock_bh(&li->lock);
|
|
list_for_each_entry_safe(inti, n, &li->list, list) {
|
|
if ((inti->type == KVM_S390_MCHK) &&
|
|
__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_bh(&li->lock);
|
|
if (deliver) {
|
|
__do_deliver_interrupt(vcpu, inti);
|
|
kfree(inti);
|
|
}
|
|
} while (deliver);
|
|
}
|
|
|
|
if (atomic_read(&fi->active)) {
|
|
do {
|
|
deliver = 0;
|
|
spin_lock(&fi->lock);
|
|
list_for_each_entry_safe(inti, n, &fi->list, list) {
|
|
if ((inti->type == KVM_S390_MCHK) &&
|
|
__interrupt_is_deliverable(vcpu, inti)) {
|
|
list_del(&inti->list);
|
|
deliver = 1;
|
|
break;
|
|
}
|
|
__set_intercept_indicator(vcpu, inti);
|
|
}
|
|
if (list_empty(&fi->list))
|
|
atomic_set(&fi->active, 0);
|
|
spin_unlock(&fi->lock);
|
|
if (deliver) {
|
|
__do_deliver_interrupt(vcpu, inti);
|
|
kfree(inti);
|
|
}
|
|
} while (deliver);
|
|
}
|
|
}
|
|
|
|
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_bh(&li->lock);
|
|
list_add(&inti->list, &li->list);
|
|
atomic_set(&li->active, 1);
|
|
BUG_ON(waitqueue_active(&li->wq));
|
|
spin_unlock_bh(&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);
|
|
if (list_empty(&fi->list))
|
|
atomic_set(&fi->active, 0);
|
|
spin_unlock(&fi->lock);
|
|
mutex_unlock(&kvm->lock);
|
|
return inti;
|
|
}
|
|
|
|
int kvm_s390_inject_vm(struct kvm *kvm,
|
|
struct kvm_s390_interrupt *s390int)
|
|
{
|
|
struct kvm_s390_local_interrupt *li;
|
|
struct kvm_s390_float_interrupt *fi;
|
|
struct kvm_s390_interrupt_info *inti, *iter;
|
|
int sigcpu;
|
|
|
|
inti = kzalloc(sizeof(*inti), GFP_KERNEL);
|
|
if (!inti)
|
|
return -ENOMEM;
|
|
|
|
switch (s390int->type) {
|
|
case KVM_S390_INT_VIRTIO:
|
|
VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
|
|
s390int->parm, s390int->parm64);
|
|
inti->type = s390int->type;
|
|
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->type = s390int->type;
|
|
inti->ext.ext_params = s390int->parm;
|
|
break;
|
|
case KVM_S390_PROGRAM_INT:
|
|
case KVM_S390_SIGP_STOP:
|
|
case KVM_S390_INT_EXTERNAL_CALL:
|
|
case KVM_S390_INT_EMERGENCY:
|
|
kfree(inti);
|
|
return -EINVAL;
|
|
case KVM_S390_MCHK:
|
|
VM_EVENT(kvm, 5, "inject: machine check parm64:%llx",
|
|
s390int->parm64);
|
|
inti->type = s390int->type;
|
|
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 (s390int->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->type = s390int->type;
|
|
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);
|
|
|
|
mutex_lock(&kvm->lock);
|
|
fi = &kvm->arch.float_int;
|
|
spin_lock(&fi->lock);
|
|
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 (fi->local_int[sigcpu] == NULL);
|
|
}
|
|
li = fi->local_int[sigcpu];
|
|
spin_lock_bh(&li->lock);
|
|
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
|
|
if (waitqueue_active(&li->wq))
|
|
wake_up_interruptible(&li->wq);
|
|
spin_unlock_bh(&li->lock);
|
|
spin_unlock(&fi->lock);
|
|
mutex_unlock(&kvm->lock);
|
|
return 0;
|
|
}
|
|
|
|
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:
|
|
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_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);
|
|
|
|
mutex_lock(&vcpu->kvm->lock);
|
|
li = &vcpu->arch.local_int;
|
|
spin_lock_bh(&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);
|
|
if (waitqueue_active(&li->wq))
|
|
wake_up_interruptible(&vcpu->arch.local_int.wq);
|
|
spin_unlock_bh(&li->lock);
|
|
mutex_unlock(&vcpu->kvm->lock);
|
|
return 0;
|
|
}
|