From 0d6b3448491be36ed4b9199c9966ed93e5a5afbc Mon Sep 17 00:00:00 2001 From: Thanos Makatos Date: Tue, 12 Nov 2019 08:55:03 -0500 Subject: explain improperly patched kernel error Signed-off-by: Thanos Makatos --- README.md | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'README.md') diff --git a/README.md b/README.md index cf22b3a..f7bcb5b 100644 --- a/README.md +++ b/README.md @@ -168,3 +168,12 @@ Making libmuser Multi-threaded libmuser can be made multi-threaded in order to improve performance. To implement this we'll have to maintain a private context in struct file. + +Troubleshooting +--------------- + +If you get the following error when starting QEMU: + + qemu-system-x86_64: -device vfio-pci,sysfsdev=/sys/bus/mdev/devices/00000000-0000-0000-0000-000000000000: vfio 00000000-0000-0000-0000-000000000000: failed to read device config space: Bad address + +it might mean that you haven't properly patched your kernel. -- cgit v1.1