[PATCH bpf-next 0/8] Allocate bpf trampoline on bpf_prog_pack

Song Liu
2023-09-20T05:32:19Z

This set enables allocating bpf trampoline from bpf_prog_pack on x86. The
majority of this work, however, is the refactoring of trampoline code.
This is needed because we need to handle 4 archs and 2 users (trampoline
and struct_ops).

1/8 is a dependency that is already applied to bpf tree.
2/8 through 7/8 refactors trampoline code. A few helpers are added.
8/8 finally let bpf trampoline on x86 use bpf_prog_pack.

Song Liu (8):
s390/bpf: Let arch_prepare_bpf_trampoline return program size
bpf: Let bpf_prog_pack_free handle any pointer
bpf: Adjust argument names of arch_prepare_bpf_trampoline()
bpf: Add helpers for trampoline image management
bpf, x86: Adjust arch_prepare_bpf_trampoline return value
bpf: Add arch_bpf_trampoline_size()
bpf: Use arch_bpf_trampoline_size for trampoline
x86, bpf: Use bpf_prog_pack for bpf trampoline

arch/arm64/net/bpf_jit_comp.c | 62 +++++++++++-----
arch/riscv/net/bpf_jit_comp64.c | 24 ++++--
arch/s390/net/bpf_jit_comp.c | 52 +++++++------
arch/x86/net/bpf_jit_comp.c | 127 +++++++++++++++++++++++++-------
include/linux/bpf.h | 12 ++-
include/linux/filter.h | 2 +-
kernel/bpf/bpf_struct_ops.c | 12 ++-
kernel/bpf/core.c | 21 +++---
kernel/bpf/dispatcher.c | 5 +-
kernel/bpf/trampoline.c | 89 ++++++++++++++++------
10 files changed, 285 insertions(+), 121 deletions(-)

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2.34.1