diff options
| author | Cornelia Huck <cornelia.huck@de.ibm.com> | 2014-06-27 11:29:26 +0400 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2014-07-21 15:22:46 +0400 |
| commit | 0907c855b3b2006b11a96e6c81f91e36a5278d0e (patch) | |
| tree | 22f6c627c038707f1abaceb6c70948bc22de2f83 /Documentation | |
| parent | ea74c0ea1b24a6978a6ebc80ba4dbc7b7848b32d (diff) | |
| download | linux-0907c855b3b2006b11a96e6c81f91e36a5278d0e.tar.xz | |
KVM: document target of capability enablement
Capabilities can be enabled on a vcpu or (since recently) on a vm. Document
this and note for the existing capabilites whether they are per-vcpu or
per-vm.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index a41465bd6a5c..7ab41e9154c2 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -2875,15 +2875,18 @@ The fields in each entry are defined as follows: 6. Capabilities that can be enabled ----------------------------------- -There are certain capabilities that change the behavior of the virtual CPU when -enabled. To enable them, please see section 4.37. Below you can find a list of -capabilities and what their effect on the vCPU is when enabling them. +There are certain capabilities that change the behavior of the virtual CPU or +the virtual machine when enabled. To enable them, please see section 4.37. +Below you can find a list of capabilities and what their effect on the vCPU or +the virtual machine is when enabling them. The following information is provided along with the description: Architectures: which instruction set architectures provide this ioctl. x86 includes both i386 and x86_64. + Target: whether this is a per-vcpu or per-vm capability. + Parameters: what parameters are accepted by the capability. Returns: the return value. General error numbers (EBADF, ENOMEM, EINVAL) @@ -2893,6 +2896,7 @@ The following information is provided along with the description: 6.1 KVM_CAP_PPC_OSI Architectures: ppc +Target: vcpu Parameters: none Returns: 0 on success; -1 on error @@ -2907,6 +2911,7 @@ When this capability is enabled, KVM_EXIT_OSI can occur. 6.2 KVM_CAP_PPC_PAPR Architectures: ppc +Target: vcpu Parameters: none Returns: 0 on success; -1 on error @@ -2926,6 +2931,7 @@ When this capability is enabled, KVM_EXIT_PAPR_HCALL can occur. 6.3 KVM_CAP_SW_TLB Architectures: ppc +Target: vcpu Parameters: args[0] is the address of a struct kvm_config_tlb Returns: 0 on success; -1 on error @@ -2968,6 +2974,7 @@ For mmu types KVM_MMU_FSL_BOOKE_NOHV and KVM_MMU_FSL_BOOKE_HV: 6.4 KVM_CAP_S390_CSS_SUPPORT Architectures: s390 +Target: vcpu Parameters: none Returns: 0 on success; -1 on error @@ -2979,9 +2986,13 @@ handled in-kernel, while the other I/O instructions are passed to userspace. When this capability is enabled, KVM_EXIT_S390_TSCH will occur on TEST SUBCHANNEL intercepts. +Note that even though this capability is enabled per-vcpu, the complete +virtual machine is affected. + 6.5 KVM_CAP_PPC_EPR Architectures: ppc +Target: vcpu Parameters: args[0] defines whether the proxy facility is active Returns: 0 on success; -1 on error @@ -3007,6 +3018,7 @@ This capability connects the vcpu to an in-kernel MPIC device. 6.7 KVM_CAP_IRQ_XICS Architectures: ppc +Target: vcpu Parameters: args[0] is the XICS device fd args[1] is the XICS CPU number (server ID) for this vcpu |