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authorDavid Hildenbrand <dahi@linux.vnet.ibm.com>2014-04-10 17:35:00 +0200
committerChristian Borntraeger <borntraeger@de.ibm.com>2014-07-10 14:11:17 +0200
commit6352e4d2dd9a349024a41356148eced553e1dce4 (patch)
tree2835b0ebeacb7dc0f13e4df266f38e441b08243a /Documentation/virtual
parent0b4820d6d8b6448bc9f7fac1bb1a801a53b425e1 (diff)
downloadlinux-6352e4d2dd9a349024a41356148eced553e1dce4.tar.bz2
KVM: s390: implement KVM_(S|G)ET_MP_STATE for user space state control
This patch - adds s390 specific MP states to linux headers and documents them - implements the KVM_{SET,GET}_MP_STATE ioctls - enables KVM_CAP_MP_STATE - allows user space to control the VCPU state on s390. If user space sets the VCPU state using the ioctl KVM_SET_MP_STATE, we can disable manual changing of the VCPU state and trust user space to do the right thing. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'Documentation/virtual')
-rw-r--r--Documentation/virtual/kvm/api.txt10
1 files changed, 8 insertions, 2 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 904c61cdd311..a41465bd6a5c 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -974,7 +974,7 @@ for vm-wide capabilities.
4.38 KVM_GET_MP_STATE
Capability: KVM_CAP_MP_STATE
-Architectures: x86, ia64
+Architectures: x86, ia64, s390
Type: vcpu ioctl
Parameters: struct kvm_mp_state (out)
Returns: 0 on success; -1 on error
@@ -998,6 +998,12 @@ Possible values are:
is waiting for an interrupt [x86, ia64]
- KVM_MP_STATE_SIPI_RECEIVED: the vcpu has just received a SIPI (vector
accessible via KVM_GET_VCPU_EVENTS) [x86, ia64]
+ - KVM_MP_STATE_STOPPED: the vcpu is stopped [s390]
+ - KVM_MP_STATE_CHECK_STOP: the vcpu is in a special error state [s390]
+ - KVM_MP_STATE_OPERATING: the vcpu is operating (running or halted)
+ [s390]
+ - KVM_MP_STATE_LOAD: the vcpu is in a special load/startup state
+ [s390]
On x86 and ia64, this ioctl is only useful after KVM_CREATE_IRQCHIP. Without an
in-kernel irqchip, the multiprocessing state must be maintained by userspace on
@@ -1007,7 +1013,7 @@ these architectures.
4.39 KVM_SET_MP_STATE
Capability: KVM_CAP_MP_STATE
-Architectures: x86, ia64
+Architectures: x86, ia64, s390
Type: vcpu ioctl
Parameters: struct kvm_mp_state (in)
Returns: 0 on success; -1 on error