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author | Alexander Graf <agraf@suse.de> | 2010-08-31 04:25:39 +0200 |
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committer | Avi Kivity <avi@redhat.com> | 2010-10-24 10:52:22 +0200 |
commit | d1e87c7ee65a20b10faf7e59dbe2cc934c32473b (patch) | |
tree | 8f28ef6f662e391e0c7b4dcc387927eb2aba2979 /Documentation/kvm | |
parent | 344941beb9926418663e171a347d1a31d727fe45 (diff) | |
download | kernel_samsung_crespo-d1e87c7ee65a20b10faf7e59dbe2cc934c32473b.zip kernel_samsung_crespo-d1e87c7ee65a20b10faf7e59dbe2cc934c32473b.tar.gz kernel_samsung_crespo-d1e87c7ee65a20b10faf7e59dbe2cc934c32473b.tar.bz2 |
KVM: PPC: Add documentation for magic page enhancements
This documents how to detect additional features inside the magic
page when a guest maps it.
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'Documentation/kvm')
-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 922cf95..a7f2244 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 ======== |