2008-03-25 18:47:23 +01:00
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/*
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2012-07-20 11:15:04 +02:00
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* in-kernel handling for sie intercepts
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2008-03-25 18:47:23 +01:00
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*
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2012-07-20 11:15:04 +02:00
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* Copyright IBM Corp. 2008, 2009
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2008-03-25 18:47:23 +01:00
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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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* Christian Borntraeger <borntraeger@de.ibm.com>
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*/
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#include <linux/kvm_host.h>
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#include <linux/errno.h>
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#include <linux/pagemap.h>
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#include <asm/kvm_host.h>
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#include "kvm-s390.h"
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KVM: s390: interrupt subsystem, cpu timer, waitpsw
This patch contains the s390 interrupt subsystem (similar to in kernel apic)
including timer interrupts (similar to in-kernel-pit) and enabled wait
(similar to in kernel hlt).
In order to achieve that, this patch also introduces intercept handling
for instruction intercepts, and it implements load control instructions.
This patch introduces an ioctl KVM_S390_INTERRUPT which is valid for both
the vm file descriptors and the vcpu file descriptors. In case this ioctl is
issued against a vm file descriptor, the interrupt is considered floating.
Floating interrupts may be delivered to any virtual cpu in the configuration.
The following interrupts are supported:
SIGP STOP - interprocessor signal that stops a remote cpu
SIGP SET PREFIX - interprocessor signal that sets the prefix register of a
(stopped) remote cpu
INT EMERGENCY - interprocessor interrupt, usually used to signal need_reshed
and for smp_call_function() in the guest.
PROGRAM INT - exception during program execution such as page fault, illegal
instruction and friends
RESTART - interprocessor signal that starts a stopped cpu
INT VIRTIO - floating interrupt for virtio signalisation
INT SERVICE - floating interrupt for signalisations from the system
service processor
struct kvm_s390_interrupt, which is submitted as ioctl parameter when injecting
an interrupt, also carrys parameter data for interrupts along with the interrupt
type. Interrupts on s390 usually have a state that represents the current
operation, or identifies which device has caused the interruption on s390.
kvm_s390_handle_wait() does handle waitpsw in two flavors: in case of a
disabled wait (that is, disabled for interrupts), we exit to userspace. In case
of an enabled wait we set up a timer that equals the cpu clock comparator value
and sleep on a wait queue.
[christian: change virtio interrupt to 0x2603]
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 18:47:26 +01:00
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#include "gaccess.h"
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2012-07-23 17:20:29 +02:00
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#include "trace.h"
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2012-07-23 17:20:30 +02:00
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#include "trace-s390.h"
|
KVM: s390: interrupt subsystem, cpu timer, waitpsw
This patch contains the s390 interrupt subsystem (similar to in kernel apic)
including timer interrupts (similar to in-kernel-pit) and enabled wait
(similar to in kernel hlt).
In order to achieve that, this patch also introduces intercept handling
for instruction intercepts, and it implements load control instructions.
This patch introduces an ioctl KVM_S390_INTERRUPT which is valid for both
the vm file descriptors and the vcpu file descriptors. In case this ioctl is
issued against a vm file descriptor, the interrupt is considered floating.
Floating interrupts may be delivered to any virtual cpu in the configuration.
The following interrupts are supported:
SIGP STOP - interprocessor signal that stops a remote cpu
SIGP SET PREFIX - interprocessor signal that sets the prefix register of a
(stopped) remote cpu
INT EMERGENCY - interprocessor interrupt, usually used to signal need_reshed
and for smp_call_function() in the guest.
PROGRAM INT - exception during program execution such as page fault, illegal
instruction and friends
RESTART - interprocessor signal that starts a stopped cpu
INT VIRTIO - floating interrupt for virtio signalisation
INT SERVICE - floating interrupt for signalisations from the system
service processor
struct kvm_s390_interrupt, which is submitted as ioctl parameter when injecting
an interrupt, also carrys parameter data for interrupts along with the interrupt
type. Interrupts on s390 usually have a state that represents the current
operation, or identifies which device has caused the interruption on s390.
kvm_s390_handle_wait() does handle waitpsw in two flavors: in case of a
disabled wait (that is, disabled for interrupts), we exit to userspace. In case
of an enabled wait we set up a timer that equals the cpu clock comparator value
and sleep on a wait queue.
[christian: change virtio interrupt to 0x2603]
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 18:47:26 +01:00
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2012-12-20 15:32:10 +01:00
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2012-12-20 15:32:06 +01:00
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static const intercept_handler_t instruction_handlers[256] = {
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2012-04-24 09:24:44 +02:00
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[0x01] = kvm_s390_handle_01,
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2012-12-20 15:32:09 +01:00
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[0x82] = kvm_s390_handle_lpsw,
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2008-03-25 18:47:34 +01:00
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[0x83] = kvm_s390_handle_diag,
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2008-03-25 18:47:31 +01:00
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[0xae] = kvm_s390_handle_sigp,
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2009-01-22 10:28:29 +01:00
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[0xb2] = kvm_s390_handle_b2,
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2014-01-23 10:47:13 +01:00
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[0xb6] = kvm_s390_handle_stctl,
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2013-06-20 17:22:04 +02:00
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[0xb7] = kvm_s390_handle_lctl,
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2012-12-20 15:32:09 +01:00
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[0xb9] = kvm_s390_handle_b9,
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2011-07-24 10:48:17 +02:00
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[0xe5] = kvm_s390_handle_e5,
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2013-06-20 17:22:04 +02:00
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[0xeb] = kvm_s390_handle_eb,
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KVM: s390: interrupt subsystem, cpu timer, waitpsw
This patch contains the s390 interrupt subsystem (similar to in kernel apic)
including timer interrupts (similar to in-kernel-pit) and enabled wait
(similar to in kernel hlt).
In order to achieve that, this patch also introduces intercept handling
for instruction intercepts, and it implements load control instructions.
This patch introduces an ioctl KVM_S390_INTERRUPT which is valid for both
the vm file descriptors and the vcpu file descriptors. In case this ioctl is
issued against a vm file descriptor, the interrupt is considered floating.
Floating interrupts may be delivered to any virtual cpu in the configuration.
The following interrupts are supported:
SIGP STOP - interprocessor signal that stops a remote cpu
SIGP SET PREFIX - interprocessor signal that sets the prefix register of a
(stopped) remote cpu
INT EMERGENCY - interprocessor interrupt, usually used to signal need_reshed
and for smp_call_function() in the guest.
PROGRAM INT - exception during program execution such as page fault, illegal
instruction and friends
RESTART - interprocessor signal that starts a stopped cpu
INT VIRTIO - floating interrupt for virtio signalisation
INT SERVICE - floating interrupt for signalisations from the system
service processor
struct kvm_s390_interrupt, which is submitted as ioctl parameter when injecting
an interrupt, also carrys parameter data for interrupts along with the interrupt
type. Interrupts on s390 usually have a state that represents the current
operation, or identifies which device has caused the interruption on s390.
kvm_s390_handle_wait() does handle waitpsw in two flavors: in case of a
disabled wait (that is, disabled for interrupts), we exit to userspace. In case
of an enabled wait we set up a timer that equals the cpu clock comparator value
and sleep on a wait queue.
[christian: change virtio interrupt to 0x2603]
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 18:47:26 +01:00
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};
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2008-03-25 18:47:23 +01:00
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static int handle_noop(struct kvm_vcpu *vcpu)
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{
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switch (vcpu->arch.sie_block->icptcode) {
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2008-05-07 09:22:53 +02:00
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case 0x0:
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vcpu->stat.exit_null++;
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break;
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2008-03-25 18:47:23 +01:00
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case 0x10:
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vcpu->stat.exit_external_request++;
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break;
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case 0x14:
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vcpu->stat.exit_external_interrupt++;
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break;
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default:
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break; /* nothing */
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}
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return 0;
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}
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static int handle_stop(struct kvm_vcpu *vcpu)
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{
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2009-05-20 15:34:55 +02:00
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int rc = 0;
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2008-03-25 18:47:31 +01:00
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2008-03-25 18:47:23 +01:00
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vcpu->stat.exit_stop_request++;
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2008-03-25 18:47:31 +01:00
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spin_lock_bh(&vcpu->arch.local_int.lock);
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2012-07-23 17:20:30 +02:00
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trace_kvm_s390_stop_request(vcpu->arch.local_int.action_bits);
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2008-03-25 18:47:31 +01:00
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if (vcpu->arch.local_int.action_bits & ACTION_STOP_ON_STOP) {
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2011-11-17 11:00:41 +01:00
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atomic_set_mask(CPUSTAT_STOPPED,
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&vcpu->arch.sie_block->cpuflags);
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2008-03-25 18:47:31 +01:00
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vcpu->arch.local_int.action_bits &= ~ACTION_STOP_ON_STOP;
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VCPU_EVENT(vcpu, 3, "%s", "cpu stopped");
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2010-02-26 22:37:41 +01:00
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rc = -EOPNOTSUPP;
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2009-05-20 15:34:55 +02:00
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}
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2012-02-06 10:59:03 +01:00
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if (vcpu->arch.local_int.action_bits & ACTION_STORE_ON_STOP) {
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vcpu->arch.local_int.action_bits &= ~ACTION_STORE_ON_STOP;
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/* store status must be called unlocked. Since local_int.lock
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* only protects local_int.* and not guest memory we can give
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* up the lock here */
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spin_unlock_bh(&vcpu->arch.local_int.lock);
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rc = kvm_s390_vcpu_store_status(vcpu,
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KVM_S390_STORE_STATUS_NOADDR);
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if (rc >= 0)
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rc = -EOPNOTSUPP;
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} else
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spin_unlock_bh(&vcpu->arch.local_int.lock);
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2008-03-25 18:47:31 +01:00
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return rc;
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2008-03-25 18:47:23 +01:00
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}
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static int handle_validity(struct kvm_vcpu *vcpu)
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{
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int viwhy = vcpu->arch.sie_block->ipb >> 16;
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2009-05-12 17:21:52 +02:00
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2008-03-25 18:47:23 +01:00
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vcpu->stat.exit_validity++;
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2012-07-23 17:20:29 +02:00
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trace_kvm_s390_intercept_validity(vcpu, viwhy);
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2013-05-17 14:41:36 +02:00
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WARN_ONCE(true, "kvm: unhandled validity intercept 0x%x\n", viwhy);
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return -EOPNOTSUPP;
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2008-03-25 18:47:23 +01:00
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}
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|
KVM: s390: interrupt subsystem, cpu timer, waitpsw
This patch contains the s390 interrupt subsystem (similar to in kernel apic)
including timer interrupts (similar to in-kernel-pit) and enabled wait
(similar to in kernel hlt).
In order to achieve that, this patch also introduces intercept handling
for instruction intercepts, and it implements load control instructions.
This patch introduces an ioctl KVM_S390_INTERRUPT which is valid for both
the vm file descriptors and the vcpu file descriptors. In case this ioctl is
issued against a vm file descriptor, the interrupt is considered floating.
Floating interrupts may be delivered to any virtual cpu in the configuration.
The following interrupts are supported:
SIGP STOP - interprocessor signal that stops a remote cpu
SIGP SET PREFIX - interprocessor signal that sets the prefix register of a
(stopped) remote cpu
INT EMERGENCY - interprocessor interrupt, usually used to signal need_reshed
and for smp_call_function() in the guest.
PROGRAM INT - exception during program execution such as page fault, illegal
instruction and friends
RESTART - interprocessor signal that starts a stopped cpu
INT VIRTIO - floating interrupt for virtio signalisation
INT SERVICE - floating interrupt for signalisations from the system
service processor
struct kvm_s390_interrupt, which is submitted as ioctl parameter when injecting
an interrupt, also carrys parameter data for interrupts along with the interrupt
type. Interrupts on s390 usually have a state that represents the current
operation, or identifies which device has caused the interruption on s390.
kvm_s390_handle_wait() does handle waitpsw in two flavors: in case of a
disabled wait (that is, disabled for interrupts), we exit to userspace. In case
of an enabled wait we set up a timer that equals the cpu clock comparator value
and sleep on a wait queue.
[christian: change virtio interrupt to 0x2603]
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 18:47:26 +01:00
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static int handle_instruction(struct kvm_vcpu *vcpu)
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{
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intercept_handler_t handler;
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vcpu->stat.exit_instruction++;
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2012-07-23 17:20:29 +02:00
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trace_kvm_s390_intercept_instruction(vcpu,
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vcpu->arch.sie_block->ipa,
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vcpu->arch.sie_block->ipb);
|
KVM: s390: interrupt subsystem, cpu timer, waitpsw
This patch contains the s390 interrupt subsystem (similar to in kernel apic)
including timer interrupts (similar to in-kernel-pit) and enabled wait
(similar to in kernel hlt).
In order to achieve that, this patch also introduces intercept handling
for instruction intercepts, and it implements load control instructions.
This patch introduces an ioctl KVM_S390_INTERRUPT which is valid for both
the vm file descriptors and the vcpu file descriptors. In case this ioctl is
issued against a vm file descriptor, the interrupt is considered floating.
Floating interrupts may be delivered to any virtual cpu in the configuration.
The following interrupts are supported:
SIGP STOP - interprocessor signal that stops a remote cpu
SIGP SET PREFIX - interprocessor signal that sets the prefix register of a
(stopped) remote cpu
INT EMERGENCY - interprocessor interrupt, usually used to signal need_reshed
and for smp_call_function() in the guest.
PROGRAM INT - exception during program execution such as page fault, illegal
instruction and friends
RESTART - interprocessor signal that starts a stopped cpu
INT VIRTIO - floating interrupt for virtio signalisation
INT SERVICE - floating interrupt for signalisations from the system
service processor
struct kvm_s390_interrupt, which is submitted as ioctl parameter when injecting
an interrupt, also carrys parameter data for interrupts along with the interrupt
type. Interrupts on s390 usually have a state that represents the current
operation, or identifies which device has caused the interruption on s390.
kvm_s390_handle_wait() does handle waitpsw in two flavors: in case of a
disabled wait (that is, disabled for interrupts), we exit to userspace. In case
of an enabled wait we set up a timer that equals the cpu clock comparator value
and sleep on a wait queue.
[christian: change virtio interrupt to 0x2603]
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 18:47:26 +01:00
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handler = instruction_handlers[vcpu->arch.sie_block->ipa >> 8];
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if (handler)
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return handler(vcpu);
|
2010-02-26 22:37:41 +01:00
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return -EOPNOTSUPP;
|
KVM: s390: interrupt subsystem, cpu timer, waitpsw
This patch contains the s390 interrupt subsystem (similar to in kernel apic)
including timer interrupts (similar to in-kernel-pit) and enabled wait
(similar to in kernel hlt).
In order to achieve that, this patch also introduces intercept handling
for instruction intercepts, and it implements load control instructions.
This patch introduces an ioctl KVM_S390_INTERRUPT which is valid for both
the vm file descriptors and the vcpu file descriptors. In case this ioctl is
issued against a vm file descriptor, the interrupt is considered floating.
Floating interrupts may be delivered to any virtual cpu in the configuration.
The following interrupts are supported:
SIGP STOP - interprocessor signal that stops a remote cpu
SIGP SET PREFIX - interprocessor signal that sets the prefix register of a
(stopped) remote cpu
INT EMERGENCY - interprocessor interrupt, usually used to signal need_reshed
and for smp_call_function() in the guest.
PROGRAM INT - exception during program execution such as page fault, illegal
instruction and friends
RESTART - interprocessor signal that starts a stopped cpu
INT VIRTIO - floating interrupt for virtio signalisation
INT SERVICE - floating interrupt for signalisations from the system
service processor
struct kvm_s390_interrupt, which is submitted as ioctl parameter when injecting
an interrupt, also carrys parameter data for interrupts along with the interrupt
type. Interrupts on s390 usually have a state that represents the current
operation, or identifies which device has caused the interruption on s390.
kvm_s390_handle_wait() does handle waitpsw in two flavors: in case of a
disabled wait (that is, disabled for interrupts), we exit to userspace. In case
of an enabled wait we set up a timer that equals the cpu clock comparator value
and sleep on a wait queue.
[christian: change virtio interrupt to 0x2603]
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 18:47:26 +01:00
|
|
|
}
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|
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|
|
|
2014-03-03 10:54:33 +01:00
|
|
|
static void __extract_prog_irq(struct kvm_vcpu *vcpu,
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struct kvm_s390_pgm_info *pgm_info)
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{
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memset(pgm_info, 0, sizeof(struct kvm_s390_pgm_info));
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pgm_info->code = vcpu->arch.sie_block->iprcc;
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switch (vcpu->arch.sie_block->iprcc & ~PGM_PER) {
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case PGM_AFX_TRANSLATION:
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case PGM_ASX_TRANSLATION:
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case PGM_EX_TRANSLATION:
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case PGM_LFX_TRANSLATION:
|
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case PGM_LSTE_SEQUENCE:
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case PGM_LSX_TRANSLATION:
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case PGM_LX_TRANSLATION:
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case PGM_PRIMARY_AUTHORITY:
|
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case PGM_SECONDARY_AUTHORITY:
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|
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case PGM_SPACE_SWITCH:
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pgm_info->trans_exc_code = vcpu->arch.sie_block->tecmc;
|
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break;
|
|
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case PGM_ALEN_TRANSLATION:
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case PGM_ALE_SEQUENCE:
|
|
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|
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case PGM_ASTE_INSTANCE:
|
|
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|
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case PGM_ASTE_SEQUENCE:
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|
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|
|
case PGM_ASTE_VALIDITY:
|
|
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case PGM_EXTENDED_AUTHORITY:
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|
|
pgm_info->exc_access_id = vcpu->arch.sie_block->eai;
|
|
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break;
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|
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|
case PGM_ASCE_TYPE:
|
|
|
|
|
case PGM_PAGE_TRANSLATION:
|
|
|
|
|
case PGM_REGION_FIRST_TRANS:
|
|
|
|
|
case PGM_REGION_SECOND_TRANS:
|
|
|
|
|
case PGM_REGION_THIRD_TRANS:
|
|
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|
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case PGM_SEGMENT_TRANSLATION:
|
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|
pgm_info->trans_exc_code = vcpu->arch.sie_block->tecmc;
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|
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|
pgm_info->exc_access_id = vcpu->arch.sie_block->eai;
|
|
|
|
|
pgm_info->op_access_id = vcpu->arch.sie_block->oai;
|
|
|
|
|
break;
|
|
|
|
|
case PGM_MONITOR:
|
|
|
|
|
pgm_info->mon_class_nr = vcpu->arch.sie_block->mcn;
|
|
|
|
|
pgm_info->mon_code = vcpu->arch.sie_block->tecmc;
|
|
|
|
|
break;
|
|
|
|
|
case PGM_DATA:
|
|
|
|
|
pgm_info->data_exc_code = vcpu->arch.sie_block->dxc;
|
|
|
|
|
break;
|
|
|
|
|
case PGM_PROTECTION:
|
|
|
|
|
pgm_info->trans_exc_code = vcpu->arch.sie_block->tecmc;
|
|
|
|
|
pgm_info->exc_access_id = vcpu->arch.sie_block->eai;
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (vcpu->arch.sie_block->iprcc & PGM_PER) {
|
|
|
|
|
pgm_info->per_code = vcpu->arch.sie_block->perc;
|
|
|
|
|
pgm_info->per_atmid = vcpu->arch.sie_block->peratmid;
|
|
|
|
|
pgm_info->per_address = vcpu->arch.sie_block->peraddr;
|
|
|
|
|
pgm_info->per_access_id = vcpu->arch.sie_block->peraid;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2014-01-23 12:26:52 +01:00
|
|
|
#define per_event(vcpu) (vcpu->arch.sie_block->iprcc & PGM_PER)
|
|
|
|
|
|
KVM: s390: interrupt subsystem, cpu timer, waitpsw
This patch contains the s390 interrupt subsystem (similar to in kernel apic)
including timer interrupts (similar to in-kernel-pit) and enabled wait
(similar to in kernel hlt).
In order to achieve that, this patch also introduces intercept handling
for instruction intercepts, and it implements load control instructions.
This patch introduces an ioctl KVM_S390_INTERRUPT which is valid for both
the vm file descriptors and the vcpu file descriptors. In case this ioctl is
issued against a vm file descriptor, the interrupt is considered floating.
Floating interrupts may be delivered to any virtual cpu in the configuration.
The following interrupts are supported:
SIGP STOP - interprocessor signal that stops a remote cpu
SIGP SET PREFIX - interprocessor signal that sets the prefix register of a
(stopped) remote cpu
INT EMERGENCY - interprocessor interrupt, usually used to signal need_reshed
and for smp_call_function() in the guest.
PROGRAM INT - exception during program execution such as page fault, illegal
instruction and friends
RESTART - interprocessor signal that starts a stopped cpu
INT VIRTIO - floating interrupt for virtio signalisation
INT SERVICE - floating interrupt for signalisations from the system
service processor
struct kvm_s390_interrupt, which is submitted as ioctl parameter when injecting
an interrupt, also carrys parameter data for interrupts along with the interrupt
type. Interrupts on s390 usually have a state that represents the current
operation, or identifies which device has caused the interruption on s390.
kvm_s390_handle_wait() does handle waitpsw in two flavors: in case of a
disabled wait (that is, disabled for interrupts), we exit to userspace. In case
of an enabled wait we set up a timer that equals the cpu clock comparator value
and sleep on a wait queue.
[christian: change virtio interrupt to 0x2603]
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 18:47:26 +01:00
|
|
|
static int handle_prog(struct kvm_vcpu *vcpu)
|
|
|
|
|
{
|
2014-03-03 10:54:33 +01:00
|
|
|
struct kvm_s390_pgm_info pgm_info;
|
2014-01-01 16:37:47 +01:00
|
|
|
struct kvm_s390_itdb *itdb;
|
|
|
|
|
int rc;
|
|
|
|
|
|
KVM: s390: interrupt subsystem, cpu timer, waitpsw
This patch contains the s390 interrupt subsystem (similar to in kernel apic)
including timer interrupts (similar to in-kernel-pit) and enabled wait
(similar to in kernel hlt).
In order to achieve that, this patch also introduces intercept handling
for instruction intercepts, and it implements load control instructions.
This patch introduces an ioctl KVM_S390_INTERRUPT which is valid for both
the vm file descriptors and the vcpu file descriptors. In case this ioctl is
issued against a vm file descriptor, the interrupt is considered floating.
Floating interrupts may be delivered to any virtual cpu in the configuration.
The following interrupts are supported:
SIGP STOP - interprocessor signal that stops a remote cpu
SIGP SET PREFIX - interprocessor signal that sets the prefix register of a
(stopped) remote cpu
INT EMERGENCY - interprocessor interrupt, usually used to signal need_reshed
and for smp_call_function() in the guest.
PROGRAM INT - exception during program execution such as page fault, illegal
instruction and friends
RESTART - interprocessor signal that starts a stopped cpu
INT VIRTIO - floating interrupt for virtio signalisation
INT SERVICE - floating interrupt for signalisations from the system
service processor
struct kvm_s390_interrupt, which is submitted as ioctl parameter when injecting
an interrupt, also carrys parameter data for interrupts along with the interrupt
type. Interrupts on s390 usually have a state that represents the current
operation, or identifies which device has caused the interruption on s390.
kvm_s390_handle_wait() does handle waitpsw in two flavors: in case of a
disabled wait (that is, disabled for interrupts), we exit to userspace. In case
of an enabled wait we set up a timer that equals the cpu clock comparator value
and sleep on a wait queue.
[christian: change virtio interrupt to 0x2603]
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 18:47:26 +01:00
|
|
|
vcpu->stat.exit_program_interruption++;
|
2013-06-28 13:30:24 +02:00
|
|
|
|
2014-01-23 12:26:52 +01:00
|
|
|
if (guestdbg_enabled(vcpu) && per_event(vcpu)) {
|
|
|
|
|
kvm_s390_handle_per_event(vcpu);
|
|
|
|
|
/* the interrupt might have been filtered out completely */
|
|
|
|
|
if (vcpu->arch.sie_block->iprcc == 0)
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2013-06-28 13:30:24 +02:00
|
|
|
/* Restore ITDB to Program-Interruption TDB in guest memory */
|
2014-01-01 16:37:47 +01:00
|
|
|
if (!IS_TE_ENABLED(vcpu) || !IS_ITDB_VALID(vcpu))
|
|
|
|
|
goto skip_itdb;
|
|
|
|
|
if (current->thread.per_flags & PER_FLAG_NO_TE)
|
|
|
|
|
goto skip_itdb;
|
|
|
|
|
itdb = (struct kvm_s390_itdb *)vcpu->arch.sie_block->itdba;
|
|
|
|
|
rc = write_guest_lc(vcpu, TDB_ADDR, itdb, sizeof(*itdb));
|
|
|
|
|
if (rc)
|
|
|
|
|
return rc;
|
|
|
|
|
memset(itdb, 0, sizeof(*itdb));
|
|
|
|
|
skip_itdb:
|
2012-07-23 17:20:29 +02:00
|
|
|
trace_kvm_s390_intercept_prog(vcpu, vcpu->arch.sie_block->iprcc);
|
2014-03-03 10:54:33 +01:00
|
|
|
__extract_prog_irq(vcpu, &pgm_info);
|
|
|
|
|
|
|
|
|
|
return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
|
KVM: s390: interrupt subsystem, cpu timer, waitpsw
This patch contains the s390 interrupt subsystem (similar to in kernel apic)
including timer interrupts (similar to in-kernel-pit) and enabled wait
(similar to in kernel hlt).
In order to achieve that, this patch also introduces intercept handling
for instruction intercepts, and it implements load control instructions.
This patch introduces an ioctl KVM_S390_INTERRUPT which is valid for both
the vm file descriptors and the vcpu file descriptors. In case this ioctl is
issued against a vm file descriptor, the interrupt is considered floating.
Floating interrupts may be delivered to any virtual cpu in the configuration.
The following interrupts are supported:
SIGP STOP - interprocessor signal that stops a remote cpu
SIGP SET PREFIX - interprocessor signal that sets the prefix register of a
(stopped) remote cpu
INT EMERGENCY - interprocessor interrupt, usually used to signal need_reshed
and for smp_call_function() in the guest.
PROGRAM INT - exception during program execution such as page fault, illegal
instruction and friends
RESTART - interprocessor signal that starts a stopped cpu
INT VIRTIO - floating interrupt for virtio signalisation
INT SERVICE - floating interrupt for signalisations from the system
service processor
struct kvm_s390_interrupt, which is submitted as ioctl parameter when injecting
an interrupt, also carrys parameter data for interrupts along with the interrupt
type. Interrupts on s390 usually have a state that represents the current
operation, or identifies which device has caused the interruption on s390.
kvm_s390_handle_wait() does handle waitpsw in two flavors: in case of a
disabled wait (that is, disabled for interrupts), we exit to userspace. In case
of an enabled wait we set up a timer that equals the cpu clock comparator value
and sleep on a wait queue.
[christian: change virtio interrupt to 0x2603]
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 18:47:26 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int handle_instruction_and_prog(struct kvm_vcpu *vcpu)
|
|
|
|
|
{
|
|
|
|
|
int rc, rc2;
|
|
|
|
|
|
|
|
|
|
vcpu->stat.exit_instr_and_program++;
|
|
|
|
|
rc = handle_instruction(vcpu);
|
|
|
|
|
rc2 = handle_prog(vcpu);
|
|
|
|
|
|
2010-02-26 22:37:41 +01:00
|
|
|
if (rc == -EOPNOTSUPP)
|
KVM: s390: interrupt subsystem, cpu timer, waitpsw
This patch contains the s390 interrupt subsystem (similar to in kernel apic)
including timer interrupts (similar to in-kernel-pit) and enabled wait
(similar to in kernel hlt).
In order to achieve that, this patch also introduces intercept handling
for instruction intercepts, and it implements load control instructions.
This patch introduces an ioctl KVM_S390_INTERRUPT which is valid for both
the vm file descriptors and the vcpu file descriptors. In case this ioctl is
issued against a vm file descriptor, the interrupt is considered floating.
Floating interrupts may be delivered to any virtual cpu in the configuration.
The following interrupts are supported:
SIGP STOP - interprocessor signal that stops a remote cpu
SIGP SET PREFIX - interprocessor signal that sets the prefix register of a
(stopped) remote cpu
INT EMERGENCY - interprocessor interrupt, usually used to signal need_reshed
and for smp_call_function() in the guest.
PROGRAM INT - exception during program execution such as page fault, illegal
instruction and friends
RESTART - interprocessor signal that starts a stopped cpu
INT VIRTIO - floating interrupt for virtio signalisation
INT SERVICE - floating interrupt for signalisations from the system
service processor
struct kvm_s390_interrupt, which is submitted as ioctl parameter when injecting
an interrupt, also carrys parameter data for interrupts along with the interrupt
type. Interrupts on s390 usually have a state that represents the current
operation, or identifies which device has caused the interruption on s390.
kvm_s390_handle_wait() does handle waitpsw in two flavors: in case of a
disabled wait (that is, disabled for interrupts), we exit to userspace. In case
of an enabled wait we set up a timer that equals the cpu clock comparator value
and sleep on a wait queue.
[christian: change virtio interrupt to 0x2603]
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 18:47:26 +01:00
|
|
|
vcpu->arch.sie_block->icptcode = 0x04;
|
|
|
|
|
if (rc)
|
|
|
|
|
return rc;
|
|
|
|
|
return rc2;
|
|
|
|
|
}
|
|
|
|
|
|
2010-01-21 12:19:07 +01:00
|
|
|
static const intercept_handler_t intercept_funcs[] = {
|
2008-03-25 18:47:23 +01:00
|
|
|
[0x00 >> 2] = handle_noop,
|
KVM: s390: interrupt subsystem, cpu timer, waitpsw
This patch contains the s390 interrupt subsystem (similar to in kernel apic)
including timer interrupts (similar to in-kernel-pit) and enabled wait
(similar to in kernel hlt).
In order to achieve that, this patch also introduces intercept handling
for instruction intercepts, and it implements load control instructions.
This patch introduces an ioctl KVM_S390_INTERRUPT which is valid for both
the vm file descriptors and the vcpu file descriptors. In case this ioctl is
issued against a vm file descriptor, the interrupt is considered floating.
Floating interrupts may be delivered to any virtual cpu in the configuration.
The following interrupts are supported:
SIGP STOP - interprocessor signal that stops a remote cpu
SIGP SET PREFIX - interprocessor signal that sets the prefix register of a
(stopped) remote cpu
INT EMERGENCY - interprocessor interrupt, usually used to signal need_reshed
and for smp_call_function() in the guest.
PROGRAM INT - exception during program execution such as page fault, illegal
instruction and friends
RESTART - interprocessor signal that starts a stopped cpu
INT VIRTIO - floating interrupt for virtio signalisation
INT SERVICE - floating interrupt for signalisations from the system
service processor
struct kvm_s390_interrupt, which is submitted as ioctl parameter when injecting
an interrupt, also carrys parameter data for interrupts along with the interrupt
type. Interrupts on s390 usually have a state that represents the current
operation, or identifies which device has caused the interruption on s390.
kvm_s390_handle_wait() does handle waitpsw in two flavors: in case of a
disabled wait (that is, disabled for interrupts), we exit to userspace. In case
of an enabled wait we set up a timer that equals the cpu clock comparator value
and sleep on a wait queue.
[christian: change virtio interrupt to 0x2603]
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 18:47:26 +01:00
|
|
|
[0x04 >> 2] = handle_instruction,
|
|
|
|
|
[0x08 >> 2] = handle_prog,
|
|
|
|
|
[0x0C >> 2] = handle_instruction_and_prog,
|
2008-03-25 18:47:23 +01:00
|
|
|
[0x10 >> 2] = handle_noop,
|
|
|
|
|
[0x14 >> 2] = handle_noop,
|
2012-12-20 15:32:12 +01:00
|
|
|
[0x18 >> 2] = handle_noop,
|
KVM: s390: interrupt subsystem, cpu timer, waitpsw
This patch contains the s390 interrupt subsystem (similar to in kernel apic)
including timer interrupts (similar to in-kernel-pit) and enabled wait
(similar to in kernel hlt).
In order to achieve that, this patch also introduces intercept handling
for instruction intercepts, and it implements load control instructions.
This patch introduces an ioctl KVM_S390_INTERRUPT which is valid for both
the vm file descriptors and the vcpu file descriptors. In case this ioctl is
issued against a vm file descriptor, the interrupt is considered floating.
Floating interrupts may be delivered to any virtual cpu in the configuration.
The following interrupts are supported:
SIGP STOP - interprocessor signal that stops a remote cpu
SIGP SET PREFIX - interprocessor signal that sets the prefix register of a
(stopped) remote cpu
INT EMERGENCY - interprocessor interrupt, usually used to signal need_reshed
and for smp_call_function() in the guest.
PROGRAM INT - exception during program execution such as page fault, illegal
instruction and friends
RESTART - interprocessor signal that starts a stopped cpu
INT VIRTIO - floating interrupt for virtio signalisation
INT SERVICE - floating interrupt for signalisations from the system
service processor
struct kvm_s390_interrupt, which is submitted as ioctl parameter when injecting
an interrupt, also carrys parameter data for interrupts along with the interrupt
type. Interrupts on s390 usually have a state that represents the current
operation, or identifies which device has caused the interruption on s390.
kvm_s390_handle_wait() does handle waitpsw in two flavors: in case of a
disabled wait (that is, disabled for interrupts), we exit to userspace. In case
of an enabled wait we set up a timer that equals the cpu clock comparator value
and sleep on a wait queue.
[christian: change virtio interrupt to 0x2603]
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-03-25 18:47:26 +01:00
|
|
|
[0x1C >> 2] = kvm_s390_handle_wait,
|
2008-03-25 18:47:23 +01:00
|
|
|
[0x20 >> 2] = handle_validity,
|
|
|
|
|
[0x28 >> 2] = handle_stop,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
|
|
|
|
|
{
|
|
|
|
|
intercept_handler_t func;
|
|
|
|
|
u8 code = vcpu->arch.sie_block->icptcode;
|
|
|
|
|
|
2010-01-21 12:19:07 +01:00
|
|
|
if (code & 3 || (code >> 2) >= ARRAY_SIZE(intercept_funcs))
|
2010-02-26 22:37:41 +01:00
|
|
|
return -EOPNOTSUPP;
|
2008-03-25 18:47:23 +01:00
|
|
|
func = intercept_funcs[code >> 2];
|
|
|
|
|
if (func)
|
|
|
|
|
return func(vcpu);
|
2010-02-26 22:37:41 +01:00
|
|
|
return -EOPNOTSUPP;
|
2008-03-25 18:47:23 +01:00
|
|
|
}
|
