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authorGuido Günther <agx@sigxcpu.org>2017-05-26 11:19:22 +0200
committerGuido Günther <agx@sigxcpu.org>2017-05-26 11:19:22 +0200
commit0793675e892ccbf2e8b7f8b1cb58e59bc7cc391e (patch)
tree00c5a4c856f1fc667689a1bc6fee320d89d1471c
parent8289eb49c602b7fe005aed902fbc41feaa3a9945 (diff)
More qemu debugging
-rw-r--r--development/qemu-debugging.mdwn19
1 files changed, 16 insertions, 3 deletions
diff --git a/development/qemu-debugging.mdwn b/development/qemu-debugging.mdwn
index 44a8a7c..ed30a17 100644
--- a/development/qemu-debugging.mdwn
+++ b/development/qemu-debugging.mdwn
@@ -14,14 +14,20 @@ output goes to /var/log/libvirt/qemu/<vm>.log by default
<target dir='ltstest'/>
</filesystem>
-*mapped* is important. It uses extended attributes so it needs user_xattr on the host filesystem.
+*mapped* is important. It uses extended attributes so the filesystem that
+needs to be mounted with *user_xattr* on the host filesystem and the folder
+needs to be writeable by qemu:
-Guests fstab:
+ mount -o remount,user_xattr /cache/ltstest
+ chown libvirt-qemu /cache/ltstest
+
+The Guests fstab then uses:
ltstest /ltstest 9p trans=virtio,version=9p2000.L,rw 0 0
-Do
+After mounting you can write from the guest to the hosts fileystem:
+ mount /ltstest
cd /ltstest && touch a
results on the host as extended attributes
@@ -61,3 +67,10 @@ via QMP monitor:
* List all devices:
qemu-system-x86_64 -device ?
+
+* Enabling the monitor on raw qemu
+
+ $ qemu-system-i386 -qmp tcp:localhost:4444,server,nowait
+ $ telnet localhost 4444
+ { "execute": "qmp_capabilities" }
+ {"execute": "commands"}