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authorMarkus Armbruster <armbru@redhat.com>2017-02-15 13:18:55 +0100
committerMarkus Armbruster <armbru@redhat.com>2017-02-21 13:17:45 +0100
commita64aa5785d5d26878d0a80ce64625b61be8fde60 (patch)
treee321f5c6429caeceef212428fb6760cca171e1fd /vl.c
parentfb8b660e1718aaa77cccbda67af5727bb4a6250f (diff)
downloadfocaccia-qemu-a64aa5785d5d26878d0a80ce64625b61be8fde60.tar.gz
focaccia-qemu-a64aa5785d5d26878d0a80ce64625b61be8fde60.zip
hw: Deprecate -drive if=scsi with non-onboard HBAs
Block backends defined with "-drive if=T" with T other than "none" are
meant to be picked up by machine initialization code: a suitable
frontend gets created and wired up automatically.

Drives defined with if=scsi are also picked up by SCSI HBAs added with
-device, unlike other interface types.  Deprecate this usage, as follows.

Create the frontends for onboard HBAs in machine initialization code,
exactly like we do for if=ide and other interface types.  Change
scsi_legacy_handle_cmdline() to create a frontend only when it's still
missing, and warn that this usage is deprecated.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1487161136-9018-3-git-send-email-armbru@redhat.com>
Diffstat (limited to 'vl.c')
-rw-r--r--vl.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/vl.c b/vl.c
index ab40889ad6..b5d0a19811 100644
--- a/vl.c
+++ b/vl.c
@@ -4510,7 +4510,13 @@ int main(int argc, char **argv, char **envp)
 
     rom_reset_order_override();
 
-    /* Create frontends for -drive if=scsi */
+    /*
+     * Create frontends for -drive if=scsi leftovers.
+     * Normally, frontends for -drive get created by machine
+     * initialization for onboard SCSI HBAs.  However, we create a few
+     * more ever since SCSI qdevification, but this is pretty much an
+     * implementation accident, and deprecated.
+     */
     scsi_legacy_handle_cmdline();
 
     /* Did we create any drives that we failed to create a device for? */