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bpf, arm64: use BPF prog pack allocator in BPF JIT #5165

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bpf, arm64: use BPF prog pack allocator in BPF JIT #5165

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Pull request for series with
subject: bpf, arm64: use BPF prog pack allocator in BPF JIT
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=753950

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Upstream branch: d4ae3e5
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=753950
version: 1

@kernel-patches-daemon-bpf
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Upstream branch: 7793fc3
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=753950
version: 1

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Upstream branch: 4114866
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=753950
version: 1

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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=753950 expired. Closing PR.

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Upstream branch: aa7881f
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=754798
version: 2

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Upstream branch: 67faabb
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=754798
version: 2

@puranjaymohan
bpf: make bpf_prog_pack allocator portable
f2b36ef 
The bpf_prog_pack allocator currently uses module_alloc() and
module_memfree() to allocate and free memory. This is not portable
because different architectures use different methods for allocating
memory for BPF programs. Like ARM64 uses vmalloc()/vfree().

Use bpf_jit_alloc_exec() and bpf_jit_free_exec() for memory management
in bpf_prog_pack allocator. Other architectures can override these with
their implementation and will be able to use bpf_prog_pack directly.

Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Acked-by: Song Liu <song@kernel.org>
@puranjaymohan
arm64: patching: Add aarch64_insn_copy()
6c5dbda 
This will be used by BPF JIT compiler to dump JITed binary to a RX huge
page, and thus allow multiple BPF programs sharing the a huge (2MB)
page.

The bpf_prog_pack allocator that implements the above feature allocates
a RX/RW buffer pair. The JITed code is written to the RW buffer and then
this function will be used to copy the code from RW to RX buffer.

Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Acked-by: Song Liu <song@kernel.org>
@puranjaymohan
bpf, arm64: use bpf_jit_binary_pack_alloc
06573bf 
Use bpf_jit_binary_pack_alloc for memory management of JIT binaries in
ARM64 BPF JIT. The bpf_jit_binary_pack_alloc creates a pair of RW and RX
buffers. The JIT writes the program into the RW buffer. When the JIT is
done, the program is copied to the final RX buffer
with bpf_jit_binary_pack_finalize.

Implement bpf_arch_text_copy() and bpf_arch_text_invalidate() for ARM64
JIT as these functions are required by bpf_jit_binary_pack allocator.

Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=754798 expired. Closing PR.

@kernel-patches-daemon-bpf kernel-patches-daemon-bpf bot deleted the series/753950=>bpf-next branch June 14, 2023 21:59
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