From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49009) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gX1Ue-0000u2-Na for qemu-devel@nongnu.org; Wed, 12 Dec 2018 05:11:53 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gX1Uc-0003NA-J0 for qemu-devel@nongnu.org; Wed, 12 Dec 2018 05:11:52 -0500 Received: from mx1.redhat.com ([209.132.183.28]:33200) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gX1Uc-0003Lz-Aw for qemu-devel@nongnu.org; Wed, 12 Dec 2018 05:11:50 -0500 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id AB0C430024EF for ; Wed, 12 Dec 2018 10:11:49 +0000 (UTC) From: Markus Armbruster Date: Wed, 12 Dec 2018 11:11:38 +0100 Message-Id: <20181212101145.3496-5-armbru@redhat.com> In-Reply-To: <20181212101145.3496-1-armbru@redhat.com> References: <20181212101145.3496-1-armbru@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PULL 04/11] monitor: check if chardev can switch gcontext for OOB List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= From: Marc-Andr=C3=A9 Lureau Not all backends are able to switch gcontext. Those backends cannot drive a OOB monitor (the monitor would then be blocking on main thread). For example, ringbuf, spice, or more esoteric input chardevs like braille or MUX. We already forbid MUX because not all frontends are ready to run outside main loop. Replace that by a context-switching feature check. Signed-off-by: Marc-Andr=C3=A9 Lureau Message-Id: <20181205203737.9011-5-marcandre.lureau@redhat.com> [Error condition simplified, commit message adjusted accordingly] Signed-off-by: Markus Armbruster --- monitor.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/monitor.c b/monitor.c index 79afe99079..a1329d8a86 100644 --- a/monitor.c +++ b/monitor.c @@ -4562,9 +4562,10 @@ void monitor_init(Chardev *chr, int flags) bool use_oob =3D flags & MONITOR_USE_OOB; =20 if (use_oob) { - if (CHARDEV_IS_MUX(chr)) { + if (!qemu_chr_has_feature(chr, QEMU_CHAR_FEATURE_GCONTEXT)) { error_report("Monitor out-of-band is not supported with " - "MUX typed chardev backend"); + "%s typed chardev backend", + object_get_typename(OBJECT(chr))); exit(1); } if (use_readline) { --=20 2.17.2