powerpc64/bpf elfv1: Do not load TOC before calling functions

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BPF helpers always reside in core kernel and all BPF programs use the
kernel TOC. As such, there is no need to load the TOC before calling
helpers or other BPF functions. Drop code to do the same.

Add a check to ensure we don't proceed if this assumption ever changes
in future.

Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/a3cd3da4d24d95d845cd10382b1af083600c9074.1644834730.git.naveen.n.rao@linux.vnet.ibm.com

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This commit is contained in:

Naveen N. Rao 2022-02-14 16:11:42 +05:30 • committed by Michael Ellerman

parent b10cb163c4

commit 43d636f8b4

4 changed files with 30 additions and 23 deletions

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2

arch/powerpc/net/bpf_jit.h

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4

arch/powerpc/net/bpf_jit_comp.c

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8

arch/powerpc/net/bpf_jit_comp32.c

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39

arch/powerpc/net/bpf_jit_comp64.c

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