nfp: bpf: add map updates from the datapath

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Support calling map_update_elem() from the datapath programs
by calling into FW-provided helper.  Value pointer is passed
in LM pointer #2.  Keeping track of old state for arg3 is not
necessary, since LM pointer #2 will be always loaded in this
case, the trivial optimization for value at the bottom of the
stack can't be done here.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

...

This commit is contained in:

Jakub Kicinski 2018-03-28 17:48:31 -07:00 • committed by Alexei Starovoitov

parent 289c5b7630

commit 44d65a47ae

4 changed files with 21 additions and 0 deletions

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6

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

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3

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

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2

drivers/net/ethernet/netronome/nfp/bpf/main.h

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10

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

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