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authorFan Zhang <zhangfan@linux.vnet.ibm.com>2016-11-29 07:17:55 +0100
committerChristian Borntraeger <borntraeger@de.ibm.com>2017-03-22 18:59:33 +0100
commit4e0b1ab72b8af961bcaca9ec1475279c1cd9579c (patch)
tree4d4d05d417d222e02dba5c82955bf0eb1c19313d /Documentation/virtual
parent7c2b3e0ddc063f61a201ccb70a121fecc8373a49 (diff)
KVM: s390: gs support for kvm guests
This patch adds guarded storage support for KVM guest. We need to setup the necessary control blocks, the kvm_run structure for the new registers, the necessary wrappers for VSIE, as well as the machine check save areas. GS is enabled lazily and the register saving and reloading is done in KVM code. As this feature adds new content for migration, we provide a new capability for enablement (KVM_CAP_S390_GS). Signed-off-by: Fan Zhang <zhangfan@linux.vnet.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'Documentation/virtual')
-rw-r--r--Documentation/virtual/kvm/api.txt9
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 3c248f772ae6..725250858479 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -4101,6 +4101,15 @@ 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.
+
8. Other capabilities.
----------------------