[Xen-devel] [PATCH] docs: update HVM emulated unplug protocol to cover NVMe disks

[Paul Durrant <paul.durrant@xxxxxxxxxx>]

This patch defines a new bit in the mask used to instruct QEMU to unplug
emulated devices. See thread [1] for the related discussion.

[1] https://lists.xen.org/archives/html/xen-devel/2017-03/msg02924.html

Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
---
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Cc: Tim Deegan <tim@xxxxxxx>
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 docs/misc/hvm-emulated-unplug.markdown | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/docs/misc/hvm-emulated-unplug.markdown 
b/docs/misc/hvm-emulated-unplug.markdown
index 8ead0c5..f6b27ed 100644
--- a/docs/misc/hvm-emulated-unplug.markdown
+++ b/docs/misc/hvm-emulated-unplug.markdown
@@ -32,12 +32,13 @@ drivers):
    blacklisted and should not load.
 
 6. The drivers write a two-byte bitmask of devices to unplug to IO
-   port `0x10`.  The defined fields are:
+   port `0x10`.  The defined bits are:
 
-  * `1` -- All emulated disks (not including CD drives)
-  * `2` -- All emulated NICs
-  * `4` -- All IDE disks except for the primary master (not including CD
-          drives)
+  * `0` -- All emulated IDE and SCSI disks (not including CD drives).
+  * `1` -- All emulated NICs.
+  * `2` -- All IDE disks except for the primary master (not including CD
+          drives). This is overridden by bit 0.
+  * `3` -- All emulated NVMe disks.
 
    The relevant emulated devices then disappear from the relevant
    buses.  For most guest operating systems, you want to do this
-- 
2.1.4


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel