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Diffstat (limited to 'arch/s390/kvm/sigp.c')
-rw-r--r--arch/s390/kvm/sigp.c157
1 files changed, 66 insertions, 91 deletions
diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c
index 87c2b3a3bd3e..26caeb530a78 100644
--- a/arch/s390/kvm/sigp.c
+++ b/arch/s390/kvm/sigp.c
@@ -23,29 +23,30 @@
static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr,
u64 *reg)
{
- struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
+ struct kvm_s390_local_interrupt *li;
+ struct kvm_vcpu *dst_vcpu = NULL;
+ int cpuflags;
int rc;
if (cpu_addr >= KVM_MAX_VCPUS)
return SIGP_CC_NOT_OPERATIONAL;
- spin_lock(&fi->lock);
- if (fi->local_int[cpu_addr] == NULL)
- rc = SIGP_CC_NOT_OPERATIONAL;
- else if (!(atomic_read(fi->local_int[cpu_addr]->cpuflags)
- & (CPUSTAT_ECALL_PEND | CPUSTAT_STOPPED)))
+ dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
+ if (!dst_vcpu)
+ return SIGP_CC_NOT_OPERATIONAL;
+ li = &dst_vcpu->arch.local_int;
+
+ cpuflags = atomic_read(li->cpuflags);
+ if (!(cpuflags & (CPUSTAT_ECALL_PEND | CPUSTAT_STOPPED)))
rc = SIGP_CC_ORDER_CODE_ACCEPTED;
else {
*reg &= 0xffffffff00000000UL;
- if (atomic_read(fi->local_int[cpu_addr]->cpuflags)
- & CPUSTAT_ECALL_PEND)
+ if (cpuflags & CPUSTAT_ECALL_PEND)
*reg |= SIGP_STATUS_EXT_CALL_PENDING;
- if (atomic_read(fi->local_int[cpu_addr]->cpuflags)
- & CPUSTAT_STOPPED)
+ if (cpuflags & CPUSTAT_STOPPED)
*reg |= SIGP_STATUS_STOPPED;
rc = SIGP_CC_STATUS_STORED;
}
- spin_unlock(&fi->lock);
VCPU_EVENT(vcpu, 4, "sensed status of cpu %x rc %x", cpu_addr, rc);
return rc;
@@ -53,12 +54,13 @@ static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr,
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;
+ struct kvm_vcpu *dst_vcpu = NULL;
- if (cpu_addr >= KVM_MAX_VCPUS)
+ if (cpu_addr < KVM_MAX_VCPUS)
+ dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
+ if (!dst_vcpu)
return SIGP_CC_NOT_OPERATIONAL;
inti = kzalloc(sizeof(*inti), GFP_KERNEL);
@@ -68,13 +70,7 @@ static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
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 = SIGP_CC_NOT_OPERATIONAL;
- kfree(inti);
- goto unlock;
- }
+ li = &dst_vcpu->arch.local_int;
spin_lock_bh(&li->lock);
list_add_tail(&inti->list, &li->list);
atomic_set(&li->active, 1);
@@ -82,11 +78,9 @@ static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
if (waitqueue_active(li->wq))
wake_up_interruptible(li->wq);
spin_unlock_bh(&li->lock);
- rc = SIGP_CC_ORDER_CODE_ACCEPTED;
VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
-unlock:
- spin_unlock(&fi->lock);
- return rc;
+
+ return SIGP_CC_ORDER_CODE_ACCEPTED;
}
static int __sigp_conditional_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr,
@@ -122,12 +116,13 @@ static int __sigp_conditional_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr,
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;
+ struct kvm_vcpu *dst_vcpu = NULL;
- if (cpu_addr >= KVM_MAX_VCPUS)
+ if (cpu_addr < KVM_MAX_VCPUS)
+ dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
+ if (!dst_vcpu)
return SIGP_CC_NOT_OPERATIONAL;
inti = kzalloc(sizeof(*inti), GFP_KERNEL);
@@ -137,13 +132,7 @@ static int __sigp_external_call(struct kvm_vcpu *vcpu, u16 cpu_addr)
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 = SIGP_CC_NOT_OPERATIONAL;
- kfree(inti);
- goto unlock;
- }
+ li = &dst_vcpu->arch.local_int;
spin_lock_bh(&li->lock);
list_add_tail(&inti->list, &li->list);
atomic_set(&li->active, 1);
@@ -151,11 +140,9 @@ static int __sigp_external_call(struct kvm_vcpu *vcpu, u16 cpu_addr)
if (waitqueue_active(li->wq))
wake_up_interruptible(li->wq);
spin_unlock_bh(&li->lock);
- rc = SIGP_CC_ORDER_CODE_ACCEPTED;
VCPU_EVENT(vcpu, 4, "sent sigp ext call to cpu %x", cpu_addr);
-unlock:
- spin_unlock(&fi->lock);
- return rc;
+
+ return SIGP_CC_ORDER_CODE_ACCEPTED;
}
static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action)
@@ -189,31 +176,26 @@ out:
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;
+ struct kvm_vcpu *dst_vcpu = NULL;
int rc;
if (cpu_addr >= KVM_MAX_VCPUS)
return SIGP_CC_NOT_OPERATIONAL;
- spin_lock(&fi->lock);
- li = fi->local_int[cpu_addr];
- if (li == NULL) {
- rc = SIGP_CC_NOT_OPERATIONAL;
- goto unlock;
- }
+ dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
+ if (!dst_vcpu)
+ return SIGP_CC_NOT_OPERATIONAL;
+ li = &dst_vcpu->arch.local_int;
rc = __inject_sigp_stop(li, action);
-unlock:
- spin_unlock(&fi->lock);
VCPU_EVENT(vcpu, 4, "sent sigp stop to cpu %x", cpu_addr);
if ((action & ACTION_STORE_ON_STOP) != 0 && rc == -ESHUTDOWN) {
/* If the CPU has already been stopped, we still have
* to save the status when doing stop-and-store. This
* has to be done after unlocking all spinlocks. */
- struct kvm_vcpu *dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
rc = kvm_s390_store_status_unloaded(dst_vcpu,
KVM_S390_STORE_STATUS_NOADDR);
}
@@ -224,6 +206,8 @@ unlock:
static int __sigp_set_arch(struct kvm_vcpu *vcpu, u32 parameter)
{
int rc;
+ unsigned int i;
+ struct kvm_vcpu *v;
switch (parameter & 0xff) {
case 0:
@@ -231,6 +215,11 @@ static int __sigp_set_arch(struct kvm_vcpu *vcpu, u32 parameter)
break;
case 1:
case 2:
+ kvm_for_each_vcpu(i, v, vcpu->kvm) {
+ v->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
+ kvm_clear_async_pf_completion_queue(v);
+ }
+
rc = SIGP_CC_ORDER_CODE_ACCEPTED;
break;
default:
@@ -242,12 +231,18 @@ static int __sigp_set_arch(struct kvm_vcpu *vcpu, u32 parameter)
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_local_interrupt *li;
+ struct kvm_vcpu *dst_vcpu = NULL;
struct kvm_s390_interrupt_info *inti;
int rc;
u8 tmp;
+ if (cpu_addr < KVM_MAX_VCPUS)
+ dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
+ if (!dst_vcpu)
+ return SIGP_CC_NOT_OPERATIONAL;
+ li = &dst_vcpu->arch.local_int;
+
/* make sure that the new value is valid memory */
address = address & 0x7fffe000u;
if (copy_from_guest_absolute(vcpu, &tmp, address, 1) ||
@@ -261,18 +256,6 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
if (!inti)
return SIGP_CC_BUSY;
- spin_lock(&fi->lock);
- if (cpu_addr < KVM_MAX_VCPUS)
- li = fi->local_int[cpu_addr];
-
- if (li == NULL) {
- *reg &= 0xffffffff00000000UL;
- *reg |= SIGP_STATUS_INCORRECT_STATE;
- rc = SIGP_CC_STATUS_STORED;
- kfree(inti);
- goto out_fi;
- }
-
spin_lock_bh(&li->lock);
/* cpu must be in stopped state */
if (!(atomic_read(li->cpuflags) & CPUSTAT_STOPPED)) {
@@ -295,8 +278,6 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
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;
}
@@ -334,28 +315,26 @@ static int __sigp_store_status_at_addr(struct kvm_vcpu *vcpu, u16 cpu_id,
static int __sigp_sense_running(struct kvm_vcpu *vcpu, u16 cpu_addr,
u64 *reg)
{
+ struct kvm_s390_local_interrupt *li;
+ struct kvm_vcpu *dst_vcpu = NULL;
int rc;
- struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
if (cpu_addr >= KVM_MAX_VCPUS)
return SIGP_CC_NOT_OPERATIONAL;
- spin_lock(&fi->lock);
- if (fi->local_int[cpu_addr] == NULL)
- rc = SIGP_CC_NOT_OPERATIONAL;
- else {
- if (atomic_read(fi->local_int[cpu_addr]->cpuflags)
- & CPUSTAT_RUNNING) {
- /* running */
- rc = SIGP_CC_ORDER_CODE_ACCEPTED;
- } else {
- /* not running */
- *reg &= 0xffffffff00000000UL;
- *reg |= SIGP_STATUS_NOT_RUNNING;
- rc = SIGP_CC_STATUS_STORED;
- }
+ dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
+ if (!dst_vcpu)
+ return SIGP_CC_NOT_OPERATIONAL;
+ li = &dst_vcpu->arch.local_int;
+ if (atomic_read(li->cpuflags) & CPUSTAT_RUNNING) {
+ /* running */
+ rc = SIGP_CC_ORDER_CODE_ACCEPTED;
+ } else {
+ /* not running */
+ *reg &= 0xffffffff00000000UL;
+ *reg |= SIGP_STATUS_NOT_RUNNING;
+ rc = SIGP_CC_STATUS_STORED;
}
- spin_unlock(&fi->lock);
VCPU_EVENT(vcpu, 4, "sensed running status of cpu %x rc %x", cpu_addr,
rc);
@@ -366,26 +345,22 @@ static int __sigp_sense_running(struct kvm_vcpu *vcpu, u16 cpu_addr,
/* Test whether the destination CPU is available and not busy */
static int sigp_check_callable(struct kvm_vcpu *vcpu, u16 cpu_addr)
{
- struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
struct kvm_s390_local_interrupt *li;
int rc = SIGP_CC_ORDER_CODE_ACCEPTED;
+ struct kvm_vcpu *dst_vcpu = NULL;
if (cpu_addr >= KVM_MAX_VCPUS)
return SIGP_CC_NOT_OPERATIONAL;
- spin_lock(&fi->lock);
- li = fi->local_int[cpu_addr];
- if (li == NULL) {
- rc = SIGP_CC_NOT_OPERATIONAL;
- goto out;
- }
-
+ dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
+ if (!dst_vcpu)
+ return SIGP_CC_NOT_OPERATIONAL;
+ li = &dst_vcpu->arch.local_int;
spin_lock_bh(&li->lock);
if (li->action_bits & ACTION_STOP_ON_STOP)
rc = SIGP_CC_BUSY;
spin_unlock_bh(&li->lock);
-out:
- spin_unlock(&fi->lock);
+
return rc;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.