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Diffstat (limited to 'ANDROID_3.4.5/arch/s390/kvm/sigp.c')
-rw-r--r--ANDROID_3.4.5/arch/s390/kvm/sigp.c421
1 files changed, 0 insertions, 421 deletions
diff --git a/ANDROID_3.4.5/arch/s390/kvm/sigp.c b/ANDROID_3.4.5/arch/s390/kvm/sigp.c
deleted file mode 100644
index 0ad4cf23..00000000
--- a/ANDROID_3.4.5/arch/s390/kvm/sigp.c
+++ /dev/null
@@ -1,421 +0,0 @@
-/*
- * sigp.c - handlinge interprocessor communication
- *
- * Copyright IBM Corp. 2008,2009
- *
- * 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>
- * Christian Borntraeger <borntraeger@de.ibm.com>
- * Christian Ehrhardt <ehrhardt@de.ibm.com>
- */
-
-#include <linux/kvm.h>
-#include <linux/kvm_host.h>
-#include <linux/slab.h>
-#include "gaccess.h"
-#include "kvm-s390.h"
-
-/* sigp order codes */
-#define SIGP_SENSE 0x01
-#define SIGP_EXTERNAL_CALL 0x02
-#define SIGP_EMERGENCY 0x03
-#define SIGP_START 0x04
-#define SIGP_STOP 0x05
-#define SIGP_RESTART 0x06
-#define SIGP_STOP_STORE_STATUS 0x09
-#define SIGP_INITIAL_CPU_RESET 0x0b
-#define SIGP_CPU_RESET 0x0c
-#define SIGP_SET_PREFIX 0x0d
-#define SIGP_STORE_STATUS_ADDR 0x0e
-#define SIGP_SET_ARCH 0x12
-#define SIGP_SENSE_RUNNING 0x15
-
-/* cpu status bits */
-#define SIGP_STAT_EQUIPMENT_CHECK 0x80000000UL
-#define SIGP_STAT_NOT_RUNNING 0x00000400UL
-#define SIGP_STAT_INCORRECT_STATE 0x00000200UL
-#define SIGP_STAT_INVALID_PARAMETER 0x00000100UL
-#define SIGP_STAT_EXT_CALL_PENDING 0x00000080UL
-#define SIGP_STAT_STOPPED 0x00000040UL
-#define SIGP_STAT_OPERATOR_INTERV 0x00000020UL
-#define SIGP_STAT_CHECK_STOP 0x00000010UL
-#define SIGP_STAT_INOPERATIVE 0x00000004UL
-#define SIGP_STAT_INVALID_ORDER 0x00000002UL
-#define SIGP_STAT_RECEIVER_CHECK 0x00000001UL
-
-
-static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr,
- u64 *reg)
-{
- struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
- int rc;
-
- if (cpu_addr >= KVM_MAX_VCPUS)
- return 3; /* not operational */
-
- spin_lock(&fi->lock);
- if (fi->local_int[cpu_addr] == NULL)
- rc = 3; /* not operational */
- else if (!(atomic_read(fi->local_int[cpu_addr]->cpuflags)
- & CPUSTAT_STOPPED)) {
- *reg &= 0xffffffff00000000UL;
- rc = 1; /* status stored */
- } else {
- *reg &= 0xffffffff00000000UL;
- *reg |= SIGP_STAT_STOPPED;
- rc = 1; /* status stored */
- }
- spin_unlock(&fi->lock);
-
- VCPU_EVENT(vcpu, 4, "sensed status of cpu %x rc %x", cpu_addr, rc);
- return rc;
-}
-
-static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
-{
- struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
- struct kvm_s390_local_interrupt *li;
- struct kvm_s390_interrupt_info *inti;
- int rc;
-
- if (cpu_addr >= KVM_MAX_VCPUS)
- return 3; /* not operational */
-
- inti = kzalloc(sizeof(*inti), GFP_KERNEL);
- if (!inti)
- return -ENOMEM;
-
- inti->type = KVM_S390_INT_EMERGENCY;
- inti->emerg.code = vcpu->vcpu_id;
-
- spin_lock(&fi->lock);
- li = fi->local_int[cpu_addr];
- if (li == NULL) {
- rc = 3; /* not operational */
- kfree(inti);
- goto unlock;
- }
- spin_lock_bh(&li->lock);
- list_add_tail(&inti->list, &li->list);
- atomic_set(&li->active, 1);
- atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
- if (waitqueue_active(&li->wq))
- wake_up_interruptible(&li->wq);
- spin_unlock_bh(&li->lock);
- rc = 0; /* order accepted */
- VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
-unlock:
- spin_unlock(&fi->lock);
- return rc;
-}
-
-static int __sigp_external_call(struct kvm_vcpu *vcpu, u16 cpu_addr)
-{
- struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
- struct kvm_s390_local_interrupt *li;
- struct kvm_s390_interrupt_info *inti;
- int rc;
-
- if (cpu_addr >= KVM_MAX_VCPUS)
- return 3; /* not operational */
-
- inti = kzalloc(sizeof(*inti), GFP_KERNEL);
- if (!inti)
- return -ENOMEM;
-
- inti->type = KVM_S390_INT_EXTERNAL_CALL;
- inti->extcall.code = vcpu->vcpu_id;
-
- spin_lock(&fi->lock);
- li = fi->local_int[cpu_addr];
- if (li == NULL) {
- rc = 3; /* not operational */
- kfree(inti);
- goto unlock;
- }
- spin_lock_bh(&li->lock);
- list_add_tail(&inti->list, &li->list);
- atomic_set(&li->active, 1);
- atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
- if (waitqueue_active(&li->wq))
- wake_up_interruptible(&li->wq);
- spin_unlock_bh(&li->lock);
- rc = 0; /* order accepted */
- VCPU_EVENT(vcpu, 4, "sent sigp ext call to cpu %x", cpu_addr);
-unlock:
- spin_unlock(&fi->lock);
- return rc;
-}
-
-static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action)
-{
- struct kvm_s390_interrupt_info *inti;
-
- inti = kzalloc(sizeof(*inti), GFP_ATOMIC);
- if (!inti)
- return -ENOMEM;
- inti->type = KVM_S390_SIGP_STOP;
-
- spin_lock_bh(&li->lock);
- if ((atomic_read(li->cpuflags) & CPUSTAT_STOPPED))
- goto out;
- list_add_tail(&inti->list, &li->list);
- atomic_set(&li->active, 1);
- atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
- li->action_bits |= action;
- if (waitqueue_active(&li->wq))
- wake_up_interruptible(&li->wq);
-out:
- spin_unlock_bh(&li->lock);
-
- return 0; /* order accepted */
-}
-
-static int __sigp_stop(struct kvm_vcpu *vcpu, u16 cpu_addr, int action)
-{
- struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
- struct kvm_s390_local_interrupt *li;
- int rc;
-
- if (cpu_addr >= KVM_MAX_VCPUS)
- return 3; /* not operational */
-
- spin_lock(&fi->lock);
- li = fi->local_int[cpu_addr];
- if (li == NULL) {
- rc = 3; /* not operational */
- goto unlock;
- }
-
- rc = __inject_sigp_stop(li, action);
-
-unlock:
- spin_unlock(&fi->lock);
- VCPU_EVENT(vcpu, 4, "sent sigp stop to cpu %x", cpu_addr);
- return rc;
-}
-
-int kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action)
-{
- struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
- return __inject_sigp_stop(li, action);
-}
-
-static int __sigp_set_arch(struct kvm_vcpu *vcpu, u32 parameter)
-{
- int rc;
-
- switch (parameter & 0xff) {
- case 0:
- rc = 3; /* not operational */
- break;
- case 1:
- case 2:
- rc = 0; /* order accepted */
- break;
- default:
- rc = -EOPNOTSUPP;
- }
- return rc;
-}
-
-static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
- u64 *reg)
-{
- struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
- struct kvm_s390_local_interrupt *li = NULL;
- struct kvm_s390_interrupt_info *inti;
- int rc;
- u8 tmp;
-
- /* make sure that the new value is valid memory */
- address = address & 0x7fffe000u;
- if (copy_from_guest_absolute(vcpu, &tmp, address, 1) ||
- copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1)) {
- *reg |= SIGP_STAT_INVALID_PARAMETER;
- return 1; /* invalid parameter */
- }
-
- inti = kzalloc(sizeof(*inti), GFP_KERNEL);
- if (!inti)
- return 2; /* busy */
-
- spin_lock(&fi->lock);
- if (cpu_addr < KVM_MAX_VCPUS)
- li = fi->local_int[cpu_addr];
-
- if (li == NULL) {
- rc = 1; /* incorrect state */
- *reg &= SIGP_STAT_INCORRECT_STATE;
- kfree(inti);
- goto out_fi;
- }
-
- spin_lock_bh(&li->lock);
- /* cpu must be in stopped state */
- if (!(atomic_read(li->cpuflags) & CPUSTAT_STOPPED)) {
- rc = 1; /* incorrect state */
- *reg &= SIGP_STAT_INCORRECT_STATE;
- kfree(inti);
- goto out_li;
- }
-
- inti->type = KVM_S390_SIGP_SET_PREFIX;
- inti->prefix.address = address;
-
- list_add_tail(&inti->list, &li->list);
- atomic_set(&li->active, 1);
- if (waitqueue_active(&li->wq))
- wake_up_interruptible(&li->wq);
- rc = 0; /* order accepted */
-
- VCPU_EVENT(vcpu, 4, "set prefix of cpu %02x to %x", cpu_addr, address);
-out_li:
- spin_unlock_bh(&li->lock);
-out_fi:
- spin_unlock(&fi->lock);
- return rc;
-}
-
-static int __sigp_sense_running(struct kvm_vcpu *vcpu, u16 cpu_addr,
- u64 *reg)
-{
- int rc;
- struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
-
- if (cpu_addr >= KVM_MAX_VCPUS)
- return 3; /* not operational */
-
- spin_lock(&fi->lock);
- if (fi->local_int[cpu_addr] == NULL)
- rc = 3; /* not operational */
- else {
- if (atomic_read(fi->local_int[cpu_addr]->cpuflags)
- & CPUSTAT_RUNNING) {
- /* running */
- rc = 1;
- } else {
- /* not running */
- *reg &= 0xffffffff00000000UL;
- *reg |= SIGP_STAT_NOT_RUNNING;
- rc = 0;
- }
- }
- spin_unlock(&fi->lock);
-
- VCPU_EVENT(vcpu, 4, "sensed running status of cpu %x rc %x", cpu_addr,
- rc);
-
- return rc;
-}
-
-static int __sigp_restart(struct kvm_vcpu *vcpu, u16 cpu_addr)
-{
- int rc = 0;
- struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
- struct kvm_s390_local_interrupt *li;
-
- if (cpu_addr >= KVM_MAX_VCPUS)
- return 3; /* not operational */
-
- spin_lock(&fi->lock);
- li = fi->local_int[cpu_addr];
- if (li == NULL) {
- rc = 3; /* not operational */
- goto out;
- }
-
- spin_lock_bh(&li->lock);
- if (li->action_bits & ACTION_STOP_ON_STOP)
- rc = 2; /* busy */
- else
- VCPU_EVENT(vcpu, 4, "sigp restart %x to handle userspace",
- cpu_addr);
- spin_unlock_bh(&li->lock);
-out:
- spin_unlock(&fi->lock);
- return rc;
-}
-
-int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
-{
- int r1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
- int r3 = vcpu->arch.sie_block->ipa & 0x000f;
- int base2 = vcpu->arch.sie_block->ipb >> 28;
- int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
- u32 parameter;
- u16 cpu_addr = vcpu->run->s.regs.gprs[r3];
- u8 order_code;
- int rc;
-
- /* sigp in userspace can exit */
- if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
- return kvm_s390_inject_program_int(vcpu,
- PGM_PRIVILEGED_OPERATION);
-
- order_code = disp2;
- if (base2)
- order_code += vcpu->run->s.regs.gprs[base2];
-
- if (r1 % 2)
- parameter = vcpu->run->s.regs.gprs[r1];
- else
- parameter = vcpu->run->s.regs.gprs[r1 + 1];
-
- switch (order_code) {
- case SIGP_SENSE:
- vcpu->stat.instruction_sigp_sense++;
- rc = __sigp_sense(vcpu, cpu_addr,
- &vcpu->run->s.regs.gprs[r1]);
- break;
- case SIGP_EXTERNAL_CALL:
- vcpu->stat.instruction_sigp_external_call++;
- rc = __sigp_external_call(vcpu, cpu_addr);
- break;
- case SIGP_EMERGENCY:
- vcpu->stat.instruction_sigp_emergency++;
- rc = __sigp_emergency(vcpu, cpu_addr);
- break;
- case SIGP_STOP:
- vcpu->stat.instruction_sigp_stop++;
- rc = __sigp_stop(vcpu, cpu_addr, ACTION_STOP_ON_STOP);
- break;
- case SIGP_STOP_STORE_STATUS:
- vcpu->stat.instruction_sigp_stop++;
- rc = __sigp_stop(vcpu, cpu_addr, ACTION_STORE_ON_STOP |
- ACTION_STOP_ON_STOP);
- break;
- case SIGP_SET_ARCH:
- vcpu->stat.instruction_sigp_arch++;
- rc = __sigp_set_arch(vcpu, parameter);
- break;
- case SIGP_SET_PREFIX:
- vcpu->stat.instruction_sigp_prefix++;
- rc = __sigp_set_prefix(vcpu, cpu_addr, parameter,
- &vcpu->run->s.regs.gprs[r1]);
- break;
- case SIGP_SENSE_RUNNING:
- vcpu->stat.instruction_sigp_sense_running++;
- rc = __sigp_sense_running(vcpu, cpu_addr,
- &vcpu->run->s.regs.gprs[r1]);
- break;
- case SIGP_RESTART:
- vcpu->stat.instruction_sigp_restart++;
- rc = __sigp_restart(vcpu, cpu_addr);
- if (rc == 2) /* busy */
- break;
- /* user space must know about restart */
- default:
- return -EOPNOTSUPP;
- }
-
- if (rc < 0)
- return rc;
-
- vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
- vcpu->arch.sie_block->gpsw.mask |= (rc & 3ul) << 44;
- return 0;
-}
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