From 7d278e2115d084a5f78a512ae01ce946c10cff7d Mon Sep 17 00:00:00 2001 From: Ian Jackson Date: Fri, 6 Oct 2017 15:30:25 +0100 Subject: [PATCH] xl: Document VGA problems arising from lack of physmap dmop Ross reports that stdvga guests do not work, and cirrus guests are slow, because qemu tries to do xc_domain_add_to_physmap. We will need another dmop to fix this properly. For now, document the problem. (In the cirrus case, the vram remains mapped at the old guest-physical addresses, while the guest runs. We are not sure whether this is a correctness or security problem and we should advise against it.) Signed-off-by: Ian Jackson Reported-by: Ross Lagerwall CC: Ross Lagerwall CC: Wei Liu CC: Paul Durrant Signed-off-by: Ian Jackson Acked-by: Wei Liu --- docs/man/xl.cfg.pod.5.in | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/docs/man/xl.cfg.pod.5.in b/docs/man/xl.cfg.pod.5.in index cb32d0467c..cf3fa0e91d 100644 --- a/docs/man/xl.cfg.pod.5.in +++ b/docs/man/xl.cfg.pod.5.in @@ -2242,6 +2242,12 @@ For example, cdrom insert will fail. =item +You should say C. +Domains with stdvga graphics cards to not work. +Domains with cirrus vga may seem to work. + +=item + You must create user(s) for qemu to run as. Ideally, set aside a range of 32752 uids -- 2.30.2