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| -rw-r--r-- | Documentation/kvm/ppc-pv.txt | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/kvm/ppc-pv.txt b/Documentation/kvm/ppc-pv.txt index 922cf954bd9..a7f2244b3be 100644 --- a/Documentation/kvm/ppc-pv.txt +++ b/Documentation/kvm/ppc-pv.txt @@ -102,6 +102,20 @@ struct kvm_vcpu_arch_shared { Additions to the page must only occur at the end. Struct fields are always 32 or 64 bit aligned, depending on them being 32 or 64 bit wide respectively. +Magic page features +=================== + +When mapping the magic page using the KVM hypercall KVM_HC_PPC_MAP_MAGIC_PAGE, +a second return value is passed to the guest. This second return value contains +a bitmap of available features inside the magic page. + +The following enhancements to the magic page are currently available: + + KVM_MAGIC_FEAT_SR Maps SR registers r/w in the magic page + +For enhanced features in the magic page, please check for the existence of the +feature before using them! + MSR bits ======== |