On Wed, 2017-06-07 at 23:13 +0200, Christoffer Dall wrote:
The function to check if -chardev is supported by QEMU was written a long time ago, where adding chardevs did not make sense on the fixed ARM platforms. Since then, we now have a general purpose virt platform, which should support plugging in any device over PCIe which is supported in a similar fashion on x86. Signed-off-by: Christoffer Dall <cdall@linaro.org> --- src/qemu/qemu_capabilities.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 7f22492..1348af7 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -5507,6 +5507,11 @@ virQEMUCapsSupportsChardev(const virDomainDef *def, if ((def->os.arch != VIR_ARCH_ARMV7L) && (def->os.arch != VIR_ARCH_AARCH64)) return true; + /* The virt machine has a PCIe bus and allows plugging in the same type of + * devices as x86 systems do on a PCIe bus. */ + if (qemuDomainIsVirt(def)) + return true; + /* This may not be true for all ARM machine types, but at least * the only supported non-virtio serial devices of vexpress and versatile * don't have the -chardev property wired up. */
We have two bugs tracking this issue: https://bugs.linaro.org/show_bug.cgi?id=2777 https://bugzilla.redhat.com/show_bug.cgi?id=1435681 You mention in [1] that applying this patch and using a recent QEMU fixes the problem for you, however I can't say the same: I still get -device isa-serial,chardev=charserial0,id=serial0: No 'ISA' bus found for device 'isa-serial' Would you mind sharing your guest XML and the resulting QEMU command line? [1] https://bugs.linaro.org/show_bug.cgi?id=2777#c36 -- Andrea Bolognani / Red Hat / Virtualization