From: Jens Freimann <jfrei@xxxxxxxxxxxxxxxxxx>
We have introduced struct kvm_s390_irq a while ago which allows to
inject all kinds of interrupts as defined in the Principles of
Operation.
Add ioctl to inject interrupts with the extended struct kvm_s390_irq
Signed-off-by: Jens Freimann <jfrei@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Acked-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
---
Documentation/virtual/kvm/api.txt | 56 +++++++++++++++++++++++++++++++++++++++
arch/s390/kvm/kvm-s390.c | 10 +++++++
include/uapi/linux/kvm.h | 3 +++
virt/kvm/kvm_main.c | 2 +-
4 files changed, 70 insertions(+), 1 deletion(-)
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 0d7fc66..a7c651d 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -2820,6 +2820,62 @@ single frame starting at start_gfn for count frames.
Note: If any architecturally invalid key value is found in the given data then
the ioctl will return -EINVAL.
+4.92 KVM_S390_IRQ
+
+Capability: KVM_CAP_S390_INJECT_IRQ
+Architectures: s390
+Type: vcpu ioctl
+Parameters: struct kvm_s390_irq (in)
+Returns: 0 on success, -1 on error
+Errors:
+ EINVAL: interrupt type is invalid
+ type is KVM_S390_SIGP_STOP and flag parameter is invalid value
+ type is KVM_S390_INT_EXTERNAL_CALL and code is bigger
+ than the maximum of VCPUs
+ EBUSY: type is KVM_S390_SIGP_SET_PREFIX and vcpu is not stopped
+ type is KVM_S390_SIGP_STOP and a stop irq is already pending
+ type is KVM_S390_INT_EXTERNAL_CALL and an external call interrupt
+ is already pending
+
+Allows to inject an interrupt to the guest.
+
+Using struct kvm_s390_irq as a parameter allows
+to inject additional payload which is not
+possible via KVM_S390_INTERRUPT.
+
+Interrupt parameters are passed via kvm_s390_irq:
+
+struct kvm_s390_irq {
+ __u64 type;
+ union {
+ struct kvm_s390_io_info io;
+ struct kvm_s390_ext_info ext;
+ struct kvm_s390_pgm_info pgm;
+ struct kvm_s390_emerg_info emerg;
+ struct kvm_s390_extcall_info extcall;
+ struct kvm_s390_prefix_info prefix;
+ struct kvm_s390_stop_info stop;
+ struct kvm_s390_mchk_info mchk;
+ char reserved[64];
+ } u;
+};
+
+type can be one of the following:
+
+KVM_S390_SIGP_STOP - sigp stop; parameter in .stop
+KVM_S390_PROGRAM_INT - program check; parameters in .pgm
+KVM_S390_SIGP_SET_PREFIX - sigp set prefix; parameters in .prefix
+KVM_S390_RESTART - restart; no parameters
+KVM_S390_INT_CLOCK_COMP - clock comparator interrupt; no parameters
+KVM_S390_INT_CPU_TIMER - CPU timer interrupt; no parameters
+KVM_S390_INT_EMERGENCY - sigp emergency; parameters in .emerg
+KVM_S390_INT_EXTERNAL_CALL - sigp external call; parameters in .extcall
+KVM_S390_MCHK - machine check interrupt; parameters in .mchk
+
+
+Note that the vcpu ioctl is asynchronous to vcpu execution.
+
+
5. The kvm_run structure
------------------------
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index dbc9ca3..8bc25d4 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -177,6 +177,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_S390_IRQCHIP:
case KVM_CAP_VM_ATTRIBUTES:
case KVM_CAP_MP_STATE:
+ case KVM_CAP_S390_INJECT_IRQ:
case KVM_CAP_S390_USER_SIGP:
case KVM_CAP_S390_USER_STSI:
case KVM_CAP_S390_SKEYS:
@@ -2391,6 +2392,15 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
long r;
switch (ioctl) {
+ case KVM_S390_IRQ: {
+ struct kvm_s390_irq s390irq;
+
+ r = -EFAULT;
+ if (copy_from_user(&s390irq, argp, sizeof(s390irq)))
+ break;
+ r = kvm_s390_inject_vcpu(vcpu, &s390irq);
+ break;
+ }
case KVM_S390_INTERRUPT: {
struct kvm_s390_interrupt s390int;
struct kvm_s390_irq s390irq;
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 1162ef7..e61f49a 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -802,6 +802,7 @@ struct kvm_ppc_smmu_info {
#define KVM_CAP_S390_MEM_OP 108
#define KVM_CAP_S390_USER_STSI 109
#define KVM_CAP_S390_SKEYS 110
+#define KVM_CAP_S390_INJECT_IRQ 111
#ifdef KVM_CAP_IRQ_ROUTING
@@ -1182,6 +1183,8 @@ struct kvm_s390_ucas_mapping {
/* Available with KVM_CAP_S390_SKEYS */
#define KVM_S390_GET_SKEYS _IOW(KVMIO, 0xb2, struct kvm_s390_skeys)
#define KVM_S390_SET_SKEYS _IOW(KVMIO, 0xb3, struct kvm_s390_skeys)
+/* Available with KVM_CAP_S390_INJECT_IRQ */
+#define KVM_S390_IRQ _IOW(KVMIO, 0xb4, struct kvm_s390_irq)
#define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0)
#define KVM_DEV_ASSIGN_PCI_2_3 (1 << 1)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index a109370..34310a8 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2118,7 +2118,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
* Special cases: vcpu ioctls that are asynchronous to vcpu execution,
* so vcpu_load() would break it.
*/
- if (ioctl == KVM_S390_INTERRUPT || ioctl == KVM_INTERRUPT)
+ if (ioctl == KVM_S390_INTERRUPT || ioctl == KVM_S390_IRQ || ioctl == KVM_INTERRUPT)
return kvm_arch_vcpu_ioctl(filp, ioctl, arg);
#endif
--
2.3.0
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