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authorDavid Hildenbrand <dahi@linux.vnet.ibm.com>2014-07-29 08:19:26 +0200
committerChristian Borntraeger <borntraeger@de.ibm.com>2014-08-25 14:35:29 +0200
commitd8482c0d87708114a10e232768723626bf1099ba (patch)
tree7a7fc81953dcd5504e1c8ad34efd23fefa2009cd /Documentation/virtual
parent8a2ef71b0bd0060c7095fd2043992b78e23735c4 (diff)
downloadlinux-d8482c0d87708114a10e232768723626bf1099ba.tar.bz2
KVM: clarify the idea of kvm_dirty_regs
This patch clarifies that kvm_dirty_regs are just a hint to the kernel and that the kernel might just ignore some flags and sync the values (like done for acrs and gprs now). Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'Documentation/virtual')
-rw-r--r--Documentation/virtual/kvm/api.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index beae3fde075e..6485750ae08a 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -2861,6 +2861,10 @@ kvm_valid_regs for specific bits. These bits are architecture specific
and usually define the validity of a groups of registers. (e.g. one bit
for general purpose registers)
+Please note that the kernel is allowed to use the kvm_run structure as the
+primary storage for certain register types. Therefore, the kernel may use the
+values in kvm_run even if the corresponding bit in kvm_dirty_regs is not set.
+
};