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[Xen-devel] [PATCH 4/4] document new boot parameter virt_p2m

Add documentation for the new boot parameter "virt_p2m".

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
 docs/misc/xen-command-line.markdown | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/docs/misc/xen-command-line.markdown 
index 0830e5f..c56273d 100644
--- a/docs/misc/xen-command-line.markdown
+++ b/docs/misc/xen-command-line.markdown
@@ -1272,6 +1272,28 @@ The optional `keep` parameter causes Xen to continue 
using the vga
 console even after dom0 has been started.  The default behaviour is to
 relinquish control to dom0.
+### virt\_p2m
+> `= List of [ <boolean> | dom0 | dom0\_large | domu | domu\_large ]`
+> Default: `false`
+Allow pv-domains to specify a virtual address for the domain's p2m list which
+is used by the Xen tools during domain save and restore and by kdump.
+`dom0` enables this feature for Dom0.
+`dom0\_large` enables this feature for Dom0 with more than 512 GiB of RAM
+(the traditional 3 level p2m tree can't map more than that).
+`domu` enables this feature for all pv domains but Dom0.
+`domu\_large` enables this feature for all pv domains with more than 512 GiB
+of RAM but Dom0.
+`true` enables this feature for all pv domains.
+`false` disables this feature for all domains.
 ### vpid (Intel)
 > `= <boolean>`

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