; Options for the eBPF compiler port.

; Copyright (C) 2019-2021 Free Software Foundation, Inc.
;
; This file is part of GCC.
;
; GCC is free software; you can redistribute it and/or modify it under
; the terms of the GNU General Public License as published by the Free
; Software Foundation; either version 3, or (at your option) any later
; version.
;
; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
; WARRANTY; without even the implied warranty of MERCHANTABILITY or
; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
; for more details.
;
; You should have received a copy of the GNU General Public License
; along with GCC; see the file COPYING3.  If not see
; <http://www.gnu.org/licenses/>.

HeaderInclude
config/bpf/bpf-opts.h

; Selecting the kind of kernel the eBPF will be running on.

mkernel=
Target RejectNegative Joined Var(bpf_kernel) Enum(bpf_kernel) Init(LINUX_LATEST)
Generate eBPF for the given Linux kernel version.

Enum
Name(bpf_kernel) Type(enum bpf_kernel_version)

EnumValue
Enum(bpf_kernel) String(native) Value(LINUX_NATIVE) DriverOnly

EnumValue
Enum(bpf_kernel) String(latest) Value(LINUX_LATEST) DriverOnly

EnumValue
Enum(bpf_kernel) String(4.0) Value(LINUX_V4_0)

EnumValue
Enum(bpf_kernel) String(4.1) Value(LINUX_V4_1)

EnumValue
Enum(bpf_kernel) String(4.2) Value(LINUX_V4_2)

EnumValue
Enum(bpf_kernel) String(4.3) Value(LINUX_V4_3)

EnumValue
Enum(bpf_kernel) String(4.4) Value(LINUX_V4_4)

EnumValue
Enum(bpf_kernel) String(4.5) Value(LINUX_V4_5)

EnumValue
Enum(bpf_kernel) String(4.6) Value(LINUX_V4_6)

EnumValue
Enum(bpf_kernel) String(4.7) Value(LINUX_V4_7)

EnumValue
Enum(bpf_kernel) String(4.8) Value(LINUX_V4_8)

EnumValue
Enum(bpf_kernel) String(4.9) Value(LINUX_V4_9)

EnumValue
Enum(bpf_kernel) String(4.10) Value(LINUX_V4_10)

EnumValue
Enum(bpf_kernel) String(4.11) Value(LINUX_V4_11)

EnumValue
Enum(bpf_kernel) String(4.12) Value(LINUX_V4_12)

EnumValue
Enum(bpf_kernel) String(4.13) Value(LINUX_V4_13)

EnumValue
Enum(bpf_kernel) String(4.14) Value(LINUX_V4_14)

EnumValue
Enum(bpf_kernel) String(4.15) Value(LINUX_V4_15)

EnumValue
Enum(bpf_kernel) String(4.16) Value(LINUX_V4_16)

EnumValue
Enum(bpf_kernel) String(4.17) Value(LINUX_V4_17)

EnumValue
Enum(bpf_kernel) String(4.18) Value(LINUX_V4_18)

EnumValue
Enum(bpf_kernel) String(4.19) Value(LINUX_V4_19)

EnumValue
Enum(bpf_kernel) String(4.20) Value(LINUX_V4_20)

EnumValue
Enum(bpf_kernel) String(5.0) Value(LINUX_V5_0)

EnumValue
Enum(bpf_kernel) String(5.1) Value(LINUX_V5_1)

EnumValue
Enum(bpf_kernel) String(5.2) Value(LINUX_V5_2)

; Use xBPF extensions.

mxbpf
Target Mask(XBPF)
Generate xBPF.

; Selecting big endian or little endian targets.

mbig-endian
Target RejectNegative Mask(BIG_ENDIAN)
Generate big-endian eBPF.

mlittle-endian
Target RejectNegative InverseMask(BIG_ENDIAN)
Generate little-endian eBPF.

mframe-limit=
Target Joined RejectNegative UInteger IntegerRange(0, 32767) Var(bpf_frame_limit) Init(512)
Set a hard limit for the size of each stack frame, in bytes.

mco-re
Target Mask(BPF_CORE)
Generate all necessary information for BPF Compile Once - Run Everywhere.

; Selecting BPF ISA features and versions

mjmpext
Target Var(bpf_has_jmpext) Init(-1)
Enable extra conditional-branch instructions j(s)lt and j(s)le.

malu32
Target Var(bpf_has_alu32) Init(-1)
Enable 32-bit ALU instructions.

mjmp32
Target Var(bpf_has_jmp32) Init(-1)
Enable 32-bit jump instructions.

mcpu=
Target RejectNegative Joined Var(bpf_isa) Enum(bpf_isa) Init(ISA_V3)

Enum
Name(bpf_isa) Type(enum bpf_isa_version)

EnumValue
Enum(bpf_isa) String(v1) Value(ISA_V1)

EnumValue
Enum(bpf_isa) String(v2) Value(ISA_V2)

EnumValue
Enum(bpf_isa) String(v3) Value(ISA_V3)