1955 строки
52 KiB
C
1955 строки
52 KiB
C
/*
|
|
* 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 <linux/bitmap.h>
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/sclp.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
|
|
#define PFAULT_DONE 0x0680
|
|
#define VIRTIO_PARAM 0x0d00
|
|
|
|
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 inline unsigned long pending_local_irqs(struct kvm_vcpu *vcpu)
|
|
{
|
|
return vcpu->arch.local_int.pending_irqs;
|
|
}
|
|
|
|
static unsigned long deliverable_local_irqs(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned long active_mask = pending_local_irqs(vcpu);
|
|
|
|
if (psw_extint_disabled(vcpu))
|
|
active_mask &= ~IRQ_PEND_EXT_MASK;
|
|
if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
|
|
__clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
|
|
if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul))
|
|
__clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
|
|
if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
|
|
__clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
|
|
if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul))
|
|
__clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
|
|
if (psw_mchk_disabled(vcpu))
|
|
active_mask &= ~IRQ_PEND_MCHK_MASK;
|
|
|
|
/*
|
|
* STOP irqs will never be actively delivered. They are triggered via
|
|
* intercept requests and cleared when the stop intercept is performed.
|
|
*/
|
|
__clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
|
|
|
|
return active_mask;
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
|
|
{
|
|
atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
|
|
}
|
|
|
|
static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
|
|
{
|
|
if (!(pending_local_irqs(vcpu) & IRQ_PEND_EXT_MASK))
|
|
return;
|
|
if (psw_extint_disabled(vcpu))
|
|
__set_cpuflag(vcpu, CPUSTAT_EXT_INT);
|
|
else
|
|
vcpu->arch.sie_block->lctl |= LCTL_CR0;
|
|
}
|
|
|
|
static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
|
|
{
|
|
if (!(pending_local_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
|
|
return;
|
|
if (psw_mchk_disabled(vcpu))
|
|
vcpu->arch.sie_block->ictl |= ICTL_LPSW;
|
|
else
|
|
vcpu->arch.sie_block->lctl |= LCTL_CR14;
|
|
}
|
|
|
|
static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
|
|
{
|
|
if (kvm_s390_is_stop_irq_pending(vcpu))
|
|
__set_cpuflag(vcpu, CPUSTAT_STOP_INT);
|
|
}
|
|
|
|
/* Set interception request for non-deliverable local interrupts */
|
|
static void set_intercept_indicators_local(struct kvm_vcpu *vcpu)
|
|
{
|
|
set_intercept_indicators_ext(vcpu);
|
|
set_intercept_indicators_mchk(vcpu);
|
|
set_intercept_indicators_stop(vcpu);
|
|
}
|
|
|
|
static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
|
|
struct kvm_s390_interrupt_info *inti)
|
|
{
|
|
switch (inti->type) {
|
|
case KVM_S390_INT_SERVICE:
|
|
case KVM_S390_INT_PFAULT_DONE:
|
|
case KVM_S390_INT_VIRTIO:
|
|
if (psw_extint_disabled(vcpu))
|
|
__set_cpuflag(vcpu, CPUSTAT_EXT_INT);
|
|
else
|
|
vcpu->arch.sie_block->lctl |= LCTL_CR0;
|
|
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_cpu_timer(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
int rc;
|
|
|
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
|
|
0, 0);
|
|
|
|
rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
|
|
(u16 *)__LC_EXT_INT_CODE);
|
|
rc |= put_guest_lc(vcpu, 0, (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));
|
|
clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
|
|
return rc ? -EFAULT : 0;
|
|
}
|
|
|
|
static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
int rc;
|
|
|
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
|
|
0, 0);
|
|
|
|
rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
|
|
(u16 __user *)__LC_EXT_INT_CODE);
|
|
rc |= put_guest_lc(vcpu, 0, (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));
|
|
clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
|
|
return rc ? -EFAULT : 0;
|
|
}
|
|
|
|
static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
struct kvm_s390_ext_info ext;
|
|
int rc;
|
|
|
|
spin_lock(&li->lock);
|
|
ext = li->irq.ext;
|
|
clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
|
|
li->irq.ext.ext_params2 = 0;
|
|
spin_unlock(&li->lock);
|
|
|
|
VCPU_EVENT(vcpu, 4, "interrupt: pfault init parm:%x,parm64:%llx",
|
|
0, ext.ext_params2);
|
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
|
|
KVM_S390_INT_PFAULT_INIT,
|
|
0, 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, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
|
|
return rc ? -EFAULT : 0;
|
|
}
|
|
|
|
static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
struct kvm_s390_mchk_info mchk;
|
|
int rc;
|
|
|
|
spin_lock(&li->lock);
|
|
mchk = li->irq.mchk;
|
|
/*
|
|
* If there was an exigent machine check pending, then any repressible
|
|
* machine checks that might have been pending are indicated along
|
|
* with it, so always clear both bits
|
|
*/
|
|
clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
|
|
clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
|
|
memset(&li->irq.mchk, 0, sizeof(mchk));
|
|
spin_unlock(&li->lock);
|
|
|
|
VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
|
|
mchk.mcic);
|
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK,
|
|
mchk.cr14, mchk.mcic);
|
|
|
|
rc = kvm_s390_vcpu_store_status(vcpu, KVM_S390_STORE_STATUS_PREFIXED);
|
|
rc |= put_guest_lc(vcpu, mchk.mcic,
|
|
(u64 __user *) __LC_MCCK_CODE);
|
|
rc |= put_guest_lc(vcpu, mchk.failing_storage_address,
|
|
(u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
|
|
rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
|
|
&mchk.fixed_logout, sizeof(mchk.fixed_logout));
|
|
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));
|
|
return rc ? -EFAULT : 0;
|
|
}
|
|
|
|
static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
int rc;
|
|
|
|
VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart");
|
|
vcpu->stat.deliver_restart_signal++;
|
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 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));
|
|
clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
|
|
return rc ? -EFAULT : 0;
|
|
}
|
|
|
|
static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
struct kvm_s390_prefix_info prefix;
|
|
|
|
spin_lock(&li->lock);
|
|
prefix = li->irq.prefix;
|
|
li->irq.prefix.address = 0;
|
|
clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
|
|
spin_unlock(&li->lock);
|
|
|
|
VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", prefix.address);
|
|
vcpu->stat.deliver_prefix_signal++;
|
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
|
|
KVM_S390_SIGP_SET_PREFIX,
|
|
prefix.address, 0);
|
|
|
|
kvm_s390_set_prefix(vcpu, prefix.address);
|
|
return 0;
|
|
}
|
|
|
|
static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
int rc;
|
|
int cpu_addr;
|
|
|
|
spin_lock(&li->lock);
|
|
cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
|
|
clear_bit(cpu_addr, li->sigp_emerg_pending);
|
|
if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
|
|
clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
|
|
spin_unlock(&li->lock);
|
|
|
|
VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg");
|
|
vcpu->stat.deliver_emergency_signal++;
|
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
|
|
cpu_addr, 0);
|
|
|
|
rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
|
|
(u16 *)__LC_EXT_INT_CODE);
|
|
rc |= put_guest_lc(vcpu, cpu_addr, (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));
|
|
return rc ? -EFAULT : 0;
|
|
}
|
|
|
|
static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
struct kvm_s390_extcall_info extcall;
|
|
int rc;
|
|
|
|
spin_lock(&li->lock);
|
|
extcall = li->irq.extcall;
|
|
li->irq.extcall.code = 0;
|
|
clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
|
|
spin_unlock(&li->lock);
|
|
|
|
VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call");
|
|
vcpu->stat.deliver_external_call++;
|
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
|
|
KVM_S390_INT_EXTERNAL_CALL,
|
|
extcall.code, 0);
|
|
|
|
rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
|
|
(u16 *)__LC_EXT_INT_CODE);
|
|
rc |= put_guest_lc(vcpu, 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));
|
|
return rc ? -EFAULT : 0;
|
|
}
|
|
|
|
static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
struct kvm_s390_pgm_info pgm_info;
|
|
int rc = 0;
|
|
u16 ilc = get_ilc(vcpu);
|
|
|
|
spin_lock(&li->lock);
|
|
pgm_info = li->irq.pgm;
|
|
clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
|
|
memset(&li->irq.pgm, 0, sizeof(pgm_info));
|
|
spin_unlock(&li->lock);
|
|
|
|
VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x",
|
|
pgm_info.code, ilc);
|
|
vcpu->stat.deliver_program_int++;
|
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
|
|
pgm_info.code, 0);
|
|
|
|
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,
|
|
(u16 *)__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 ? -EFAULT : 0;
|
|
}
|
|
|
|
static int __must_check __deliver_service(struct kvm_vcpu *vcpu,
|
|
struct kvm_s390_interrupt_info *inti)
|
|
{
|
|
int rc;
|
|
|
|
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, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
|
|
rc |= put_guest_lc(vcpu, 0, (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);
|
|
return rc ? -EFAULT : 0;
|
|
}
|
|
|
|
static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu,
|
|
struct kvm_s390_interrupt_info *inti)
|
|
{
|
|
int rc;
|
|
|
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
|
|
KVM_S390_INT_PFAULT_DONE, 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_DONE, (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);
|
|
return rc ? -EFAULT : 0;
|
|
}
|
|
|
|
static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu,
|
|
struct kvm_s390_interrupt_info *inti)
|
|
{
|
|
int rc;
|
|
|
|
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, EXT_IRQ_CP_SERVICE, (u16 *)__LC_EXT_INT_CODE);
|
|
rc |= put_guest_lc(vcpu, VIRTIO_PARAM, (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);
|
|
return rc ? -EFAULT : 0;
|
|
}
|
|
|
|
static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
|
|
struct kvm_s390_interrupt_info *inti)
|
|
{
|
|
int rc;
|
|
|
|
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,
|
|
((__u32)inti->io.subchannel_id << 16) |
|
|
inti->io.subchannel_nr,
|
|
((__u64)inti->io.io_int_parm << 32) |
|
|
inti->io.io_int_word);
|
|
|
|
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));
|
|
return rc ? -EFAULT : 0;
|
|
}
|
|
|
|
static int __must_check __deliver_mchk_floating(struct kvm_vcpu *vcpu,
|
|
struct kvm_s390_interrupt_info *inti)
|
|
{
|
|
struct kvm_s390_mchk_info *mchk = &inti->mchk;
|
|
int rc;
|
|
|
|
VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
|
|
mchk->mcic);
|
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK,
|
|
mchk->cr14, mchk->mcic);
|
|
|
|
rc = kvm_s390_vcpu_store_status(vcpu, KVM_S390_STORE_STATUS_PREFIXED);
|
|
rc |= put_guest_lc(vcpu, mchk->mcic,
|
|
(u64 __user *) __LC_MCCK_CODE);
|
|
rc |= put_guest_lc(vcpu, mchk->failing_storage_address,
|
|
(u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
|
|
rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
|
|
&mchk->fixed_logout, sizeof(mchk->fixed_logout));
|
|
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));
|
|
return rc ? -EFAULT : 0;
|
|
}
|
|
|
|
typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu);
|
|
|
|
static const deliver_irq_t deliver_irq_funcs[] = {
|
|
[IRQ_PEND_MCHK_EX] = __deliver_machine_check,
|
|
[IRQ_PEND_PROG] = __deliver_prog,
|
|
[IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal,
|
|
[IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call,
|
|
[IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc,
|
|
[IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer,
|
|
[IRQ_PEND_RESTART] = __deliver_restart,
|
|
[IRQ_PEND_SET_PREFIX] = __deliver_set_prefix,
|
|
[IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init,
|
|
};
|
|
|
|
static int __must_check __deliver_floating_interrupt(struct kvm_vcpu *vcpu,
|
|
struct kvm_s390_interrupt_info *inti)
|
|
{
|
|
int rc;
|
|
|
|
switch (inti->type) {
|
|
case KVM_S390_INT_SERVICE:
|
|
rc = __deliver_service(vcpu, inti);
|
|
break;
|
|
case KVM_S390_INT_PFAULT_DONE:
|
|
rc = __deliver_pfault_done(vcpu, inti);
|
|
break;
|
|
case KVM_S390_INT_VIRTIO:
|
|
rc = __deliver_virtio(vcpu, inti);
|
|
break;
|
|
case KVM_S390_MCHK:
|
|
rc = __deliver_mchk_floating(vcpu, inti);
|
|
break;
|
|
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
|
|
rc = __deliver_io(vcpu, inti);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/* Check whether an external call is pending (deliverable or not) */
|
|
int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
|
|
|
|
if (!sclp_has_sigpif())
|
|
return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
|
|
|
|
return (sigp_ctrl & SIGP_CTRL_C) &&
|
|
(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND);
|
|
}
|
|
|
|
int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
|
|
{
|
|
struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
|
|
struct kvm_s390_interrupt_info *inti;
|
|
int rc;
|
|
|
|
rc = !!deliverable_local_irqs(vcpu);
|
|
|
|
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;
|
|
|
|
/* external call pending and deliverable */
|
|
if (!rc && kvm_s390_ext_call_pending(vcpu) &&
|
|
!psw_extint_disabled(vcpu) &&
|
|
(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
|
|
rc = 1;
|
|
|
|
if (!rc && !exclude_stop && kvm_s390_is_stop_irq_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 */
|
|
}
|
|
|
|
if (!ckc_interrupts_enabled(vcpu)) {
|
|
VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
|
|
__set_cpu_idle(vcpu);
|
|
goto no_timer;
|
|
}
|
|
|
|
now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
|
|
sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
|
|
|
|
/* underflow */
|
|
if (vcpu->arch.sie_block->ckc < now)
|
|
return 0;
|
|
|
|
__set_cpu_idle(vcpu);
|
|
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_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);
|
|
vcpu->stat.halt_wakeup++;
|
|
}
|
|
}
|
|
|
|
enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
|
|
{
|
|
struct kvm_vcpu *vcpu;
|
|
u64 now, sltime;
|
|
|
|
vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
|
|
now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
|
|
sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
|
|
|
|
/*
|
|
* If the monotonic clock runs faster than the tod clock we might be
|
|
* woken up too early and have to go back to sleep to avoid deadlocks.
|
|
*/
|
|
if (vcpu->arch.sie_block->ckc > now &&
|
|
hrtimer_forward_now(timer, ns_to_ktime(sltime)))
|
|
return HRTIMER_RESTART;
|
|
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;
|
|
|
|
spin_lock(&li->lock);
|
|
li->pending_irqs = 0;
|
|
bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
|
|
memset(&li->irq, 0, sizeof(li->irq));
|
|
spin_unlock(&li->lock);
|
|
|
|
/* clear pending external calls set by sigp interpretation facility */
|
|
atomic_clear_mask(CPUSTAT_ECALL_PEND, li->cpuflags);
|
|
vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl = 0;
|
|
}
|
|
|
|
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;
|
|
deliver_irq_t func;
|
|
int deliver;
|
|
int rc = 0;
|
|
unsigned long irq_type;
|
|
unsigned long deliverable_irqs;
|
|
|
|
__reset_intercept_indicators(vcpu);
|
|
|
|
/* pending ckc conditions might have been invalidated */
|
|
clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
|
|
if (kvm_cpu_has_pending_timer(vcpu))
|
|
set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
|
|
|
|
do {
|
|
deliverable_irqs = deliverable_local_irqs(vcpu);
|
|
/* bits are in the order of interrupt priority */
|
|
irq_type = find_first_bit(&deliverable_irqs, IRQ_PEND_COUNT);
|
|
if (irq_type == IRQ_PEND_COUNT)
|
|
break;
|
|
func = deliver_irq_funcs[irq_type];
|
|
if (!func) {
|
|
WARN_ON_ONCE(func == NULL);
|
|
clear_bit(irq_type, &li->pending_irqs);
|
|
continue;
|
|
}
|
|
rc = func(vcpu);
|
|
} while (!rc && irq_type != IRQ_PEND_COUNT);
|
|
|
|
set_intercept_indicators_local(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 = __deliver_floating_interrupt(vcpu, inti);
|
|
kfree(inti);
|
|
}
|
|
} while (!rc && deliver);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
|
|
li->irq.pgm = irq->u.pgm;
|
|
set_bit(IRQ_PEND_PROG, &li->pending_irqs);
|
|
return 0;
|
|
}
|
|
|
|
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_irq irq;
|
|
|
|
VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code);
|
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, code,
|
|
0, 1);
|
|
spin_lock(&li->lock);
|
|
irq.u.pgm.code = code;
|
|
__inject_prog(vcpu, &irq);
|
|
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_irq irq;
|
|
int rc;
|
|
|
|
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);
|
|
spin_lock(&li->lock);
|
|
irq.u.pgm = *pgm_info;
|
|
rc = __inject_prog(vcpu, &irq);
|
|
BUG_ON(waitqueue_active(li->wq));
|
|
spin_unlock(&li->lock);
|
|
return rc;
|
|
}
|
|
|
|
static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
|
|
VCPU_EVENT(vcpu, 3, "inject: external irq params:%x, params2:%llx",
|
|
irq->u.ext.ext_params, irq->u.ext.ext_params2);
|
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
|
|
irq->u.ext.ext_params,
|
|
irq->u.ext.ext_params2, 2);
|
|
|
|
li->irq.ext = irq->u.ext;
|
|
set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
|
|
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
|
|
return 0;
|
|
}
|
|
|
|
static int __inject_extcall_sigpif(struct kvm_vcpu *vcpu, uint16_t src_id)
|
|
{
|
|
unsigned char new_val, old_val;
|
|
uint8_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
|
|
|
|
new_val = SIGP_CTRL_C | (src_id & SIGP_CTRL_SCN_MASK);
|
|
old_val = *sigp_ctrl & ~SIGP_CTRL_C;
|
|
if (cmpxchg(sigp_ctrl, old_val, new_val) != old_val) {
|
|
/* another external call is pending */
|
|
return -EBUSY;
|
|
}
|
|
atomic_set_mask(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
|
|
return 0;
|
|
}
|
|
|
|
static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
|
|
uint16_t src_id = irq->u.extcall.code;
|
|
|
|
VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u",
|
|
src_id);
|
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
|
|
src_id, 0, 2);
|
|
|
|
/* sending vcpu invalid */
|
|
if (src_id >= KVM_MAX_VCPUS ||
|
|
kvm_get_vcpu(vcpu->kvm, src_id) == NULL)
|
|
return -EINVAL;
|
|
|
|
if (sclp_has_sigpif())
|
|
return __inject_extcall_sigpif(vcpu, src_id);
|
|
|
|
if (!test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
|
|
return -EBUSY;
|
|
*extcall = irq->u.extcall;
|
|
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
|
|
return 0;
|
|
}
|
|
|
|
static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
|
|
|
|
VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)",
|
|
irq->u.prefix.address);
|
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
|
|
irq->u.prefix.address, 0, 2);
|
|
|
|
if (!is_vcpu_stopped(vcpu))
|
|
return -EBUSY;
|
|
|
|
*prefix = irq->u.prefix;
|
|
set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
|
|
return 0;
|
|
}
|
|
|
|
#define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
|
|
static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
struct kvm_s390_stop_info *stop = &li->irq.stop;
|
|
int rc = 0;
|
|
|
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0, 2);
|
|
|
|
if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
|
|
return -EINVAL;
|
|
|
|
if (is_vcpu_stopped(vcpu)) {
|
|
if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
|
|
rc = kvm_s390_store_status_unloaded(vcpu,
|
|
KVM_S390_STORE_STATUS_NOADDR);
|
|
return rc;
|
|
}
|
|
|
|
if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
|
|
return -EBUSY;
|
|
stop->flags = irq->u.stop.flags;
|
|
__set_cpuflag(vcpu, CPUSTAT_STOP_INT);
|
|
return 0;
|
|
}
|
|
|
|
static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
|
|
struct kvm_s390_irq *irq)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
|
|
VCPU_EVENT(vcpu, 3, "inject: restart type %llx", irq->type);
|
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0, 2);
|
|
|
|
set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
|
|
return 0;
|
|
}
|
|
|
|
static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
|
|
struct kvm_s390_irq *irq)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
|
|
VCPU_EVENT(vcpu, 3, "inject: emergency %u\n",
|
|
irq->u.emerg.code);
|
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
|
|
irq->u.emerg.code, 0, 2);
|
|
|
|
set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
|
|
set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
|
|
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
|
|
return 0;
|
|
}
|
|
|
|
static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
|
|
|
|
VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx",
|
|
irq->u.mchk.mcic);
|
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
|
|
irq->u.mchk.mcic, 2);
|
|
|
|
/*
|
|
* Because repressible machine checks can be indicated along with
|
|
* exigent machine checks (PoP, Chapter 11, Interruption action)
|
|
* we need to combine cr14, mcic and external damage code.
|
|
* Failing storage address and the logout area should not be or'ed
|
|
* together, we just indicate the last occurrence of the corresponding
|
|
* machine check
|
|
*/
|
|
mchk->cr14 |= irq->u.mchk.cr14;
|
|
mchk->mcic |= irq->u.mchk.mcic;
|
|
mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
|
|
mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
|
|
memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
|
|
sizeof(mchk->fixed_logout));
|
|
if (mchk->mcic & MCHK_EX_MASK)
|
|
set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
|
|
else if (mchk->mcic & MCHK_REP_MASK)
|
|
set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
|
|
return 0;
|
|
}
|
|
|
|
static int __inject_ckc(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
|
|
VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CLOCK_COMP);
|
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
|
|
0, 0, 2);
|
|
|
|
set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
|
|
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
|
|
return 0;
|
|
}
|
|
|
|
static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
|
|
VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CPU_TIMER);
|
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
|
|
0, 0, 2);
|
|
|
|
set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
|
|
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
|
|
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;
|
|
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);
|
|
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;
|
|
|
|
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);
|
|
if (atomic_read(&kvm->online_vcpus) == 0)
|
|
goto unlock_fi;
|
|
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);
|
|
switch (inti->type) {
|
|
case KVM_S390_MCHK:
|
|
atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
|
|
break;
|
|
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
|
|
atomic_set_mask(CPUSTAT_IO_INT, li->cpuflags);
|
|
break;
|
|
default:
|
|
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
|
|
break;
|
|
}
|
|
spin_unlock(&li->lock);
|
|
kvm_s390_vcpu_wakeup(kvm_get_vcpu(kvm, sigcpu));
|
|
unlock_fi:
|
|
spin_unlock(&fi->lock);
|
|
return rc;
|
|
}
|
|
|
|
int kvm_s390_inject_vm(struct kvm *kvm,
|
|
struct kvm_s390_interrupt *s390int)
|
|
{
|
|
struct kvm_s390_interrupt_info *inti;
|
|
int rc;
|
|
|
|
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->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);
|
|
|
|
rc = __inject_vm(kvm, inti);
|
|
if (rc)
|
|
kfree(inti);
|
|
return rc;
|
|
}
|
|
|
|
void kvm_s390_reinject_io_int(struct kvm *kvm,
|
|
struct kvm_s390_interrupt_info *inti)
|
|
{
|
|
__inject_vm(kvm, inti);
|
|
}
|
|
|
|
int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
|
|
struct kvm_s390_irq *irq)
|
|
{
|
|
irq->type = s390int->type;
|
|
switch (irq->type) {
|
|
case KVM_S390_PROGRAM_INT:
|
|
if (s390int->parm & 0xffff0000)
|
|
return -EINVAL;
|
|
irq->u.pgm.code = s390int->parm;
|
|
break;
|
|
case KVM_S390_SIGP_SET_PREFIX:
|
|
irq->u.prefix.address = s390int->parm;
|
|
break;
|
|
case KVM_S390_SIGP_STOP:
|
|
irq->u.stop.flags = s390int->parm;
|
|
break;
|
|
case KVM_S390_INT_EXTERNAL_CALL:
|
|
if (s390int->parm & 0xffff0000)
|
|
return -EINVAL;
|
|
irq->u.extcall.code = s390int->parm;
|
|
break;
|
|
case KVM_S390_INT_EMERGENCY:
|
|
if (s390int->parm & 0xffff0000)
|
|
return -EINVAL;
|
|
irq->u.emerg.code = s390int->parm;
|
|
break;
|
|
case KVM_S390_MCHK:
|
|
irq->u.mchk.mcic = s390int->parm64;
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
|
|
return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
|
|
}
|
|
|
|
void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
|
|
spin_lock(&li->lock);
|
|
li->irq.stop.flags = 0;
|
|
clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
|
|
spin_unlock(&li->lock);
|
|
}
|
|
|
|
int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
|
|
{
|
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
|
|
int rc;
|
|
|
|
spin_lock(&li->lock);
|
|
switch (irq->type) {
|
|
case KVM_S390_PROGRAM_INT:
|
|
VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)",
|
|
irq->u.pgm.code);
|
|
rc = __inject_prog(vcpu, irq);
|
|
break;
|
|
case KVM_S390_SIGP_SET_PREFIX:
|
|
rc = __inject_set_prefix(vcpu, irq);
|
|
break;
|
|
case KVM_S390_SIGP_STOP:
|
|
rc = __inject_sigp_stop(vcpu, irq);
|
|
break;
|
|
case KVM_S390_RESTART:
|
|
rc = __inject_sigp_restart(vcpu, irq);
|
|
break;
|
|
case KVM_S390_INT_CLOCK_COMP:
|
|
rc = __inject_ckc(vcpu);
|
|
break;
|
|
case KVM_S390_INT_CPU_TIMER:
|
|
rc = __inject_cpu_timer(vcpu);
|
|
break;
|
|
case KVM_S390_INT_EXTERNAL_CALL:
|
|
rc = __inject_extcall(vcpu, irq);
|
|
break;
|
|
case KVM_S390_INT_EMERGENCY:
|
|
rc = __inject_sigp_emergency(vcpu, irq);
|
|
break;
|
|
case KVM_S390_MCHK:
|
|
rc = __inject_mchk(vcpu, irq);
|
|
break;
|
|
case KVM_S390_INT_PFAULT_INIT:
|
|
rc = __inject_pfault_init(vcpu, irq);
|
|
break;
|
|
case KVM_S390_INT_VIRTIO:
|
|
case KVM_S390_INT_SERVICE:
|
|
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
|
|
default:
|
|
rc = -EINVAL;
|
|
}
|
|
spin_unlock(&li->lock);
|
|
if (!rc)
|
|
kvm_s390_vcpu_wakeup(vcpu);
|
|
return rc;
|
|
}
|
|
|
|
void kvm_s390_clear_float_irqs(struct kvm *kvm)
|
|
{
|
|
struct kvm_s390_float_interrupt *fi;
|
|
struct kvm_s390_interrupt_info *n, *inti = NULL;
|
|
|
|
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);
|
|
}
|
|
|
|
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;
|
|
|
|
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);
|
|
|
|
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;
|
|
}
|