Re: [libvirt] [PATCH 00/12] qemu: support chardev for all machvirt config

Drew pointed out that we can use -chardev with machvirt platform serial devices like:      -chardev pty,id=foo    -serial chardev:foo   And indeed it looks like qemu has supported this for as long as -chardev has been around. Wiring this up will enable all the modern -chardev features for every machvirt config (and some other arch/machine types).   However just enabling that change is going to cause a lot of unneeded test suite churn, due to the fact that some code is still checking for qemu -chardev support, even though our minimum qemu version always has chardev nowadays. So take the opportunity to exorcise QEMU_CAPS_CHARDEV   * Patch 1 reverts Christopher's recent patch, to unbreak existing configs * Patch 2-3 make pci-serial work for machvirt and demonstrate it with a    test suite change. * Patch 4-10 slowly strip out QEMU_CAPS_DEVICE * Patch 11 adds -chardev support for platform serial devices * Patch 12 is a cleanup