Merge tag 'kvm-s390-next-4.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux

From: Christian Borntraeger <borntraeger@de.ibm.com>

KVM: s390: features for 4.12

1. guarded storage support for guests
   This contains an s390 base Linux feature branch that is necessary
   to implement the KVM part
2. Provide an interface to implement adapter interruption suppression
   which is necessary for proper zPCI support
3. Use more defines instead of numbers
4. Provide logging for lazy enablement of runtime instrumentation

Documentation/virtual/kvm/api.txt

@@ -3983,6 +3983,23 @@ to take care of that.
 This capability can be enabled dynamically even if VCPUs were already
 created and are running.
 
+7.9 KVM_CAP_S390_GS
+
+Architectures: s390
+Parameters: none
+Returns: 0 on success; -EINVAL if the machine does not support
+	 guarded storage; -EBUSY if a VCPU has already been created.
+
+Allows use of guarded storage for the KVM guest.
+
+7.10 KVM_CAP_S390_AIS
+
+Architectures: s390
+Parameters: none
+
+Allow use of adapter-interruption suppression.
+Returns: 0 on success; -EBUSY if a VCPU has already been created.
+
 8. Other capabilities.
 ----------------------
 

Documentation/virtual/kvm/devices/s390_flic.txt

@@ -14,6 +14,8 @@ FLIC provides support to
 - purge one pending floating I/O interrupt (KVM_DEV_FLIC_CLEAR_IO_IRQ)
 - enable/disable for the guest transparent async page faults
 - register and modify adapter interrupt sources (KVM_DEV_FLIC_ADAPTER_*)
+- modify AIS (adapter-interruption-suppression) mode state (KVM_DEV_FLIC_AISM)
+- inject adapter interrupts on a specified adapter (KVM_DEV_FLIC_AIRQ_INJECT)
 
 Groups:
   KVM_DEV_FLIC_ENQUEUE
@@ -64,12 +66,18 @@ struct kvm_s390_io_adapter {
 	__u8 isc;
 	__u8 maskable;
 	__u8 swap;
-	__u8 pad;
+	__u8 flags;
 };
 
    id contains the unique id for the adapter, isc the I/O interruption subclass
-   to use, maskable whether this adapter may be masked (interrupts turned off)
-   and swap whether the indicators need to be byte swapped.
+   to use, maskable whether this adapter may be masked (interrupts turned off),
+   swap whether the indicators need to be byte swapped, and flags contains
+   further characteristics of the adapter.
+   Currently defined values for 'flags' are:
+   - KVM_S390_ADAPTER_SUPPRESSIBLE: adapter is subject to AIS
+     (adapter-interrupt-suppression) facility. This flag only has an effect if
+     the AIS capability is enabled.
+   Unknown flag values are ignored.
 
 
   KVM_DEV_FLIC_ADAPTER_MODIFY
@@ -101,6 +109,33 @@ struct kvm_s390_io_adapter_req {
       release a userspace page for the translated address specified in addr
       from the list of mappings
 
+  KVM_DEV_FLIC_AISM
+    modify the adapter-interruption-suppression mode for a given isc if the
+    AIS capability is enabled. Takes a kvm_s390_ais_req describing:
+
+struct kvm_s390_ais_req {
+	__u8 isc;
+	__u16 mode;
+};
+
+    isc contains the target I/O interruption subclass, mode the target
+    adapter-interruption-suppression mode. The following modes are
+    currently supported:
+    - KVM_S390_AIS_MODE_ALL: ALL-Interruptions Mode, i.e. airq injection
+      is always allowed;
+    - KVM_S390_AIS_MODE_SINGLE: SINGLE-Interruption Mode, i.e. airq
+      injection is only allowed once and the following adapter interrupts
+      will be suppressed until the mode is set again to ALL-Interruptions
+      or SINGLE-Interruption mode.
+
+  KVM_DEV_FLIC_AIRQ_INJECT
+    Inject adapter interrupts on a specified adapter.
+    attr->attr contains the unique id for the adapter, which allows for
+    adapter-specific checks and actions.
+    For adapters subject to AIS, handle the airq injection suppression for
+    an isc according to the adapter-interruption-suppression mode on condition
+    that the AIS capability is enabled.
+
 Note: The KVM_SET_DEVICE_ATTR/KVM_GET_DEVICE_ATTR device ioctls executed on
 FLIC with an unknown group or attribute gives the error code EINVAL (instead of
 ENXIO, as specified in the API documentation). It is not possible to conclude