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powerpc/bpf: Move bpf_jit64.h into bpf_jit_comp64.c

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There is no need for a separate header anymore. Move the contents of
bpf_jit64.h into bpf_jit_comp64.c

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/b873a8e6eff7d91bf2a2cabdd53082aadfe20761.1644834730.git.naveen.n.rao@linux.vnet.ibm.com
This commit is contained in:
Naveen N. Rao 2022-02-14 16:11:48 +05:30 committed by Michael Ellerman
parent 7b187dcdb5
commit 576a6c3a00
2 changed files with 53 additions and 70 deletions
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69
arch/powerpc/net/bpf_jit64.h
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@ -1,69 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* bpf_jit64.h: BPF JIT compiler for PPC64
*
* Copyright 2016 Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
* IBM Corporation
*/
#ifndef _BPF_JIT64_H
#define _BPF_JIT64_H
#include "bpf_jit.h"
/*
* Stack layout:
* Ensure the top half (upto local_tmp_var) stays consistent
* with our redzone usage.
*
* [ prev sp ] <-------------
* [ nv gpr save area ] 5*8 |
* [ tail_call_cnt ] 8 |
* [ local_tmp_var ] 16 |
* fp (r31) --> [ ebpf stack space ] upto 512 |
* [ frame header ] 32/112 |
* sp (r1) ---> [ stack pointer ] --------------
*/
/* for gpr non volatile registers BPG_REG_6 to 10 */
#define BPF_PPC_STACK_SAVE (5*8)
/* for bpf JIT code internal usage */
#define BPF_PPC_STACK_LOCALS 24
/* stack frame excluding BPF stack, ensure this is quadword aligned */
#define BPF_PPC_STACKFRAME (STACK_FRAME_MIN_SIZE + \
BPF_PPC_STACK_LOCALS + BPF_PPC_STACK_SAVE)
#ifndef __ASSEMBLY__
/* BPF register usage */
#define TMP_REG_1 (MAX_BPF_JIT_REG + 0)
#define TMP_REG_2 (MAX_BPF_JIT_REG + 1)
/* BPF to ppc register mappings */
const int b2p[MAX_BPF_JIT_REG + 2] = {
/* function return value */
[BPF_REG_0] = 8,
/* function arguments */
[BPF_REG_1] = 3,
[BPF_REG_2] = 4,
[BPF_REG_3] = 5,
[BPF_REG_4] = 6,
[BPF_REG_5] = 7,
/* non volatile registers */
[BPF_REG_6] = 27,
[BPF_REG_7] = 28,
[BPF_REG_8] = 29,
[BPF_REG_9] = 30,
/* frame pointer aka BPF_REG_10 */
[BPF_REG_FP] = 31,
/* eBPF jit internal registers */
[BPF_REG_AX] = 12,
[TMP_REG_1] = 9,
[TMP_REG_2] = 10
};
/* PPC NVR range -- update this if we ever use NVRs below r27 */
#define BPF_PPC_NVR_MIN 27
#endif /* !__ASSEMBLY__ */
#endif

54
arch/powerpc/net/bpf_jit_comp64.c
View file

@ -17,7 +17,59 @@
#include <linux/bpf.h>
#include <asm/security_features.h>
#include "bpf_jit64.h"
#include "bpf_jit.h"
/*
* Stack layout:
* Ensure the top half (upto local_tmp_var) stays consistent
* with our redzone usage.
*
* [ prev sp ] <-------------
* [ nv gpr save area ] 5*8 |
* [ tail_call_cnt ] 8 |
* [ local_tmp_var ] 16 |
* fp (r31) --> [ ebpf stack space ] upto 512 |
* [ frame header ] 32/112 |
* sp (r1) ---> [ stack pointer ] --------------
*/
/* for gpr non volatile registers BPG_REG_6 to 10 */
#define BPF_PPC_STACK_SAVE (5*8)
/* for bpf JIT code internal usage */
#define BPF_PPC_STACK_LOCALS 24
/* stack frame excluding BPF stack, ensure this is quadword aligned */
#define BPF_PPC_STACKFRAME (STACK_FRAME_MIN_SIZE + \
BPF_PPC_STACK_LOCALS + BPF_PPC_STACK_SAVE)
/* BPF register usage */
#define TMP_REG_1 (MAX_BPF_JIT_REG + 0)
#define TMP_REG_2 (MAX_BPF_JIT_REG + 1)
/* BPF to ppc register mappings */
const int b2p[MAX_BPF_JIT_REG + 2] = {
/* function return value */
[BPF_REG_0] = 8,
/* function arguments */
[BPF_REG_1] = 3,
[BPF_REG_2] = 4,
[BPF_REG_3] = 5,
[BPF_REG_4] = 6,
[BPF_REG_5] = 7,
/* non volatile registers */
[BPF_REG_6] = 27,
[BPF_REG_7] = 28,
[BPF_REG_8] = 29,
[BPF_REG_9] = 30,
/* frame pointer aka BPF_REG_10 */
[BPF_REG_FP] = 31,
/* eBPF jit internal registers */
[BPF_REG_AX] = 12,
[TMP_REG_1] = 9,
[TMP_REG_2] = 10
};
/* PPC NVR range -- update this if we ever use NVRs below r27 */
#define BPF_PPC_NVR_MIN 27
static inline bool bpf_has_stack_frame(struct codegen_context *ctx)
{