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authorScott Wood <scottwood@freescale.com>2011-06-14 18:34:41 -0500
committerAvi Kivity <avi@redhat.com>2011-07-12 13:16:37 +0300
commita4cd8b23ac5786943202c0174c717956947db43c (patch)
tree46e1dc4646d6c2a27fc83944e24aad1c1fafb292 /Documentation/virtual
parent9973d54eeafcd1c3a2e89f0f59280c4c1e03e73b (diff)
downloadop-kernel-dev-a4cd8b23ac5786943202c0174c717956947db43c.zip
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KVM: PPC: e500: enable magic page
This is a shared page used for paravirtualization. It is always present in the guest kernel's effective address space at the address indicated by the hypercall that enables it. The physical address specified by the hypercall is not used, as e500 does not have real mode. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'Documentation/virtual')
-rw-r--r--Documentation/virtual/kvm/ppc-pv.txt8
1 files changed, 5 insertions, 3 deletions
diff --git a/Documentation/virtual/kvm/ppc-pv.txt b/Documentation/virtual/kvm/ppc-pv.txt
index 3ab969c..2b7ce19 100644
--- a/Documentation/virtual/kvm/ppc-pv.txt
+++ b/Documentation/virtual/kvm/ppc-pv.txt
@@ -68,9 +68,11 @@ page that contains parts of supervisor visible register state. The guest can
map this shared page using the KVM hypercall KVM_HC_PPC_MAP_MAGIC_PAGE.
With this hypercall issued the guest always gets the magic page mapped at the
-desired location in effective and physical address space. For now, we always
-map the page to -4096. This way we can access it using absolute load and store
-functions. The following instruction reads the first field of the magic page:
+desired location. The first parameter indicates the effective address when the
+MMU is enabled. The second parameter indicates the address in real mode, if
+applicable to the target. For now, we always map the page to -4096. This way we
+can access it using absolute load and store functions. The following
+instruction reads the first field of the magic page:
ld rX, -4096(0)
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