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-rw-r--r--docs/specs/vmcoreinfo.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/docs/specs/vmcoreinfo.txt b/docs/specs/vmcoreinfo.txt
index 821261067f..bcbca6fe47 100644
--- a/docs/specs/vmcoreinfo.txt
+++ b/docs/specs/vmcoreinfo.txt
@@ -29,6 +29,10 @@ processing of entry values.
A write of 0 in guest_format will disable further processing of
vmcoreinfo entry values & content.
+You may write a guest_format that is not supported by the host, in
+which case the entry data can be ignored by qemu (but you may still
+access it through a debugger, via vmcoreinfo_realize::vmcoreinfo_state).
+
Format & content
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