Commit 2de1be1d authored Oct 08, 2017 by Jakub Kicinski Committed by David S. Miller Oct 09, 2017

nfp: bpf: pass dst register to ld_field instruction



ld_field instruction is a bit special because the encoding uses
two source registers and one of them becomes the output.  We do
need to pass the dst register to our encoding helpers though,
otherwise the "write both banks" flag will not be observed.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 2e85d388

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

+2 −1

Original line number	Diff line number	Diff line
		@@ -408,7 +408,8 @@ emit_ld_field_any(struct nfp_prog *nfp_prog, enum shf_sc sc, u8 shift,
		struct nfp_insn_re_regs reg;
		int err;

		err = swreg_to_restricted(reg_none(), dst, src, &reg, true);
		/* Note: ld_field is special as it uses one of the src regs as dst */
		err = swreg_to_restricted(dst, dst, src, &reg, true);
		if (err) {
		nfp_prog->error = err;
		return;