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authorRusty Russell <rusty@rustcorp.com.au>2015-02-13 06:43:43 (GMT)
committerRusty Russell <rusty@rustcorp.com.au>2015-02-13 06:45:51 (GMT)
commit55c2d7884e9a97c2f2d46d5818f783bf3dcc5314 (patch)
tree6291c81f9c5456dff1a1c284f8aa14a851f7e5b1 /tools
parentd761b0329108c73020a7c95b6fa0d7e82e35fe8b (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 <rusty@rustcorp.com.au>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions

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