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authorPaolo Bonzini <pbonzini@redhat.com>2014-07-22 12:22:53 +0400
committerPaolo Bonzini <pbonzini@redhat.com>2014-07-22 12:22:53 +0400
commitc756ad036fc8ef432438e89aab63cc723eda39b4 (patch)
tree16bf4d2d280f624ff2ce99f5d02aeb7f002863f6 /Documentation/virtual
parent6f43ed01e87c8a8dbd8c826eaf0f714c1342c039 (diff)
parente59d120f96687a606db0513c427f10e30a427cc4 (diff)
downloadlinux-c756ad036fc8ef432438e89aab63cc723eda39b4.tar.xz
Merge tag 'kvm-s390-20140721' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-next
Bugfixes -------- - add IPTE to trace event decoder - document and advertise KVM_CAP_S390_IRQCHIP Cleanups -------- - Reuse kvm_vcpu_block for s390 - Get rid of tasklet for wakup processing
Diffstat (limited to 'Documentation/virtual')
-rw-r--r--Documentation/virtual/kvm/api.txt27
1 files changed, 24 insertions, 3 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 587972ca12c5..68cda1fc3d52 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -2934,15 +2934,18 @@ 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)
@@ -2952,6 +2955,7 @@ 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
@@ -2966,6 +2970,7 @@ 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
@@ -2985,6 +2990,7 @@ 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
@@ -3027,6 +3033,7 @@ 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
@@ -3038,9 +3045,13 @@ 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
@@ -3066,7 +3077,17 @@ 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
This capability connects the vcpu to an in-kernel XICS device.
+
+6.8 KVM_CAP_S390_IRQCHIP
+
+Architectures: s390
+Target: vm
+Parameters: none
+
+This capability enables the in-kernel irqchip for s390. Please refer to
+"4.24 KVM_CREATE_IRQCHIP" for details.