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| author | Carsten Otte <cotte@de.ibm.com> | 2012-01-04 10:25:23 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-03-05 14:52:19 +0200 |
| commit | 5b1c1493afe8d69909f9df3221bb2fffdf479f4a (patch) | |
| tree | f64fa2be60cb44e4d9cb7cc9338b4dabba65348a /Documentation/virtual | |
| parent | e168bf8de33e16a909df2401af1f7d419c5780de (diff) | |
KVM: s390: ucontrol: export SIE control block to user
This patch exports the s390 SIE hardware control block to userspace
via the mapping of the vcpu file descriptor. In order to do so,
a new arch callback named kvm_arch_vcpu_fault is introduced for all
architectures. It allows to map architecture specific pages.
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'Documentation/virtual')
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 6e53ff51422f..5ebf47d99e56 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -218,6 +218,11 @@ allocation of vcpu ids. For example, if userspace wants single-threaded guest vcpus, it should make all vcpu ids be a multiple of the number of vcpus per vcore. +For virtual cpus that have been created with S390 user controlled virtual +machines, the resulting vcpu fd can be memory mapped at page offset +KVM_S390_SIE_PAGE_OFFSET in order to obtain a memory map of the virtual +cpu's hardware control block. + 4.8 KVM_GET_DIRTY_LOG (vm ioctl) Capability: basic |