nfp: bpf: add stack read support

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Add simple stack read support, similar to write in every aspect,
but data flowing the other way.  Note that unlike write which can
be done in smaller than word quantities, if registers are loaded
with less-than-word of stack contents - the values have to be
zero extended.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Jakub Kicinski 2017-10-23 11:58:09 -07:00 • committed by David S. Miller

parent ee9133a845

commit a82b23fb38

1 changed files with 76 additions and 5 deletions

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drivers/net/ethernet/netronome/nfp/bpf/jit.c

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