powerpc64/bpf: Use r12 for constant blinding

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In preparation for preserving kernel toc in r2, switch BPF_REG_AX from
r2 to r12. r12 is not used by bpf JIT except during external helper/bpf
calls, or with BPF_NOSPEC. These sequences aren't emitted when
BPF_REG_AX is used for constant blinding and other purposes.

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/e109f98617eacb4512c17a48525e94eda42889e6.1644834730.git.naveen.n.rao@linux.vnet.ibm.com

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Naveen N. Rao 2022-02-14 16:11:39 +05:30 • committed by Michael Ellerman

parent c2067f7f88

commit 1d4866d565

1 changed files with 1 additions and 1 deletions

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arch/powerpc/net/bpf_jit64.h

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