Christophe Leroy 5b5fab270f powerpc/bpf/32: Only set a stack frame when necessary ... [ Upstream commit d084dcf256 ] Until now a stack frame was set at all time due to the need to keep tail call counter in the stack. But since commit 89d21e259a ("powerpc/bpf/32: Fix Oops on tail call tests") the tail call counter is passed via register r4. It is therefore not necessary anymore to have a stack frame for that. Just like PPC64, implement bpf_has_stack_frame() and only sets the frame when needed. The difference with PPC64 is that PPC32 doesn't have a redzone, so the stack is required as soon as non volatile registers are used or when tail call count is set up. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> [mpe: Fix commit reference in change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/62d7b654a3cfe73d998697cb29bbc5ffd89bfdb1.1675245773.git.christophe.leroy@csgroup.eu Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-03-17 08:50:30 +01:00
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Makefile	…
bpf_jit.h	…
bpf_jit_comp.c	…
bpf_jit_comp32.c	powerpc/bpf/32: Only set a stack frame when necessary	2023-03-17 08:50:30 +01:00
bpf_jit_comp64.c	…