nfp: bpf: eliminate zero extension code-gen

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This patch eliminate zero extension code-gen for instructions including
both alu and load/store. The only exception is for ctx load, because
offload target doesn't go through host ctx convert logic so we do
customized load and ignores zext flag set by verifier.

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

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Jiong Wang 2019-05-24 23:25:28 +01:00 • committed by Alexei Starovoitov

parent 66d0d5a854

commit 0b4de1ff19

3 changed files with 81 additions and 48 deletions

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115

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

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2

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

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12

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

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