diff options
Diffstat (limited to 'Documentation/virt/kvm/api.rst')
| -rw-r--r-- | Documentation/virt/kvm/api.rst | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index d2b733dc7892..1f26d83e6b16 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -4211,7 +4211,7 @@ H_GET_CPU_CHARACTERISTICS hypercall. :Capability: basic :Architectures: x86 -:Type: system +:Type: vm :Parameters: an opaque platform specific structure (in/out) :Returns: 0 on success; -1 on error @@ -4343,7 +4343,7 @@ Errors: #define KVM_STATE_NESTED_VMX_SMM_GUEST_MODE 0x00000001 #define KVM_STATE_NESTED_VMX_SMM_VMXON 0x00000002 -#define KVM_STATE_VMX_PREEMPTION_TIMER_DEADLINE 0x00000001 + #define KVM_STATE_VMX_PREEMPTION_TIMER_DEADLINE 0x00000001 struct kvm_vmx_nested_state_hdr { __u64 vmxon_pa; @@ -6173,3 +6173,23 @@ specific interfaces must be consistent, i.e. if one says the feature is supported, than the other should as well and vice versa. For arm64 see Documentation/virt/kvm/devices/vcpu.rst "KVM_ARM_VCPU_PVTIME_CTRL". For x86 see Documentation/virt/kvm/msr.rst "MSR_KVM_STEAL_TIME". + +8.25 KVM_CAP_S390_DIAG318 +------------------------- + +:Architectures: s390 + +This capability enables a guest to set information about its control program +(i.e. guest kernel type and version). The information is helpful during +system/firmware service events, providing additional data about the guest +environments running on the machine. + +The information is associated with the DIAGNOSE 0x318 instruction, which sets +an 8-byte value consisting of a one-byte Control Program Name Code (CPNC) and +a 7-byte Control Program Version Code (CPVC). The CPNC determines what +environment the control program is running in (e.g. Linux, z/VM...), and the +CPVC is used for information specific to OS (e.g. Linux version, Linux +distribution...) + +If this capability is available, then the CPNC and CPVC can be synchronized +between KVM and userspace via the sync regs mechanism (KVM_SYNC_DIAG318). |