From 6352e4d2dd9a349024a41356148eced553e1dce4 Mon Sep 17 00:00:00 2001 From: David Hildenbrand Date: Thu, 10 Apr 2014 17:35:00 +0200 Subject: 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 Reviewed-by: Cornelia Huck Acked-by: Christian Borntraeger Signed-off-by: Christian Borntraeger --- Documentation/virtual/kvm/api.txt | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'Documentation/virtual') 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 -- cgit