|author||Rusty Russell <firstname.lastname@example.org>||2015-02-13 17:13:43 +1030|
|committer||Rusty Russell <email@example.com>||2015-02-13 17:15:51 +1030|
|parent||tools/lguest: don't start devices until DRIVER_OK status set. (diff)|
lguest: don't look in console features to find emerg_wr.
The 1.0 spec clearly states that you must set the ACKNOWLEDGE and DRIVER status bits before accessing the feature bits. This is a problem for the early console code, which doesn't really want to acknowledge the device (the spec specifically excepts writing to the console's emerg_wr from the usual ordering constrains). Instead, we check that the *size* of the device configuration is sufficient to hold emerg_wr: at worst (if the device doesn't support the VIRTIO_CONSOLE_F_EMERG_WRITE feature), it will ignore the writes. Signed-off-by: Rusty Russell <firstname.lastname@example.org>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions