mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 00:48:50 +00:00
d27865279f
Support for Branch Target Identification (BTI) in user and kernel (Mark Brown and others) * for-next/bti: (39 commits) arm64: vdso: Fix CFI directives in sigreturn trampoline arm64: vdso: Don't prefix sigreturn trampoline with a BTI C instruction arm64: bti: Fix support for userspace only BTI arm64: kconfig: Update and comment GCC version check for kernel BTI arm64: vdso: Map the vDSO text with guarded pages when built for BTI arm64: vdso: Force the vDSO to be linked as BTI when built for BTI arm64: vdso: Annotate for BTI arm64: asm: Provide a mechanism for generating ELF note for BTI arm64: bti: Provide Kconfig for kernel mode BTI arm64: mm: Mark executable text as guarded pages arm64: bpf: Annotate JITed code for BTI arm64: Set GP bit in kernel page tables to enable BTI for the kernel arm64: asm: Override SYM_FUNC_START when building the kernel with BTI arm64: bti: Support building kernel C code using BTI arm64: Document why we enable PAC support for leaf functions arm64: insn: Report PAC and BTI instructions as skippable arm64: insn: Don't assume unrecognized HINTs are skippable arm64: insn: Provide a better name for aarch64_insn_is_nop() arm64: insn: Add constants for new HINT instruction decode arm64: Disable old style assembly annotations ...
222 lines
9.2 KiB
C
222 lines
9.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* BPF JIT compiler for ARM64
|
|
*
|
|
* Copyright (C) 2014-2016 Zi Shen Lim <zlim.lnx@gmail.com>
|
|
*/
|
|
#ifndef _BPF_JIT_H
|
|
#define _BPF_JIT_H
|
|
|
|
#include <asm/insn.h>
|
|
|
|
/* 5-bit Register Operand */
|
|
#define A64_R(x) AARCH64_INSN_REG_##x
|
|
#define A64_FP AARCH64_INSN_REG_FP
|
|
#define A64_LR AARCH64_INSN_REG_LR
|
|
#define A64_ZR AARCH64_INSN_REG_ZR
|
|
#define A64_SP AARCH64_INSN_REG_SP
|
|
|
|
#define A64_VARIANT(sf) \
|
|
((sf) ? AARCH64_INSN_VARIANT_64BIT : AARCH64_INSN_VARIANT_32BIT)
|
|
|
|
/* Compare & branch (immediate) */
|
|
#define A64_COMP_BRANCH(sf, Rt, offset, type) \
|
|
aarch64_insn_gen_comp_branch_imm(0, offset, Rt, A64_VARIANT(sf), \
|
|
AARCH64_INSN_BRANCH_COMP_##type)
|
|
#define A64_CBZ(sf, Rt, imm19) A64_COMP_BRANCH(sf, Rt, (imm19) << 2, ZERO)
|
|
#define A64_CBNZ(sf, Rt, imm19) A64_COMP_BRANCH(sf, Rt, (imm19) << 2, NONZERO)
|
|
|
|
/* Conditional branch (immediate) */
|
|
#define A64_COND_BRANCH(cond, offset) \
|
|
aarch64_insn_gen_cond_branch_imm(0, offset, cond)
|
|
#define A64_COND_EQ AARCH64_INSN_COND_EQ /* == */
|
|
#define A64_COND_NE AARCH64_INSN_COND_NE /* != */
|
|
#define A64_COND_CS AARCH64_INSN_COND_CS /* unsigned >= */
|
|
#define A64_COND_HI AARCH64_INSN_COND_HI /* unsigned > */
|
|
#define A64_COND_LS AARCH64_INSN_COND_LS /* unsigned <= */
|
|
#define A64_COND_CC AARCH64_INSN_COND_CC /* unsigned < */
|
|
#define A64_COND_GE AARCH64_INSN_COND_GE /* signed >= */
|
|
#define A64_COND_GT AARCH64_INSN_COND_GT /* signed > */
|
|
#define A64_COND_LE AARCH64_INSN_COND_LE /* signed <= */
|
|
#define A64_COND_LT AARCH64_INSN_COND_LT /* signed < */
|
|
#define A64_B_(cond, imm19) A64_COND_BRANCH(cond, (imm19) << 2)
|
|
|
|
/* Unconditional branch (immediate) */
|
|
#define A64_BRANCH(offset, type) aarch64_insn_gen_branch_imm(0, offset, \
|
|
AARCH64_INSN_BRANCH_##type)
|
|
#define A64_B(imm26) A64_BRANCH((imm26) << 2, NOLINK)
|
|
#define A64_BL(imm26) A64_BRANCH((imm26) << 2, LINK)
|
|
|
|
/* Unconditional branch (register) */
|
|
#define A64_BR(Rn) aarch64_insn_gen_branch_reg(Rn, AARCH64_INSN_BRANCH_NOLINK)
|
|
#define A64_BLR(Rn) aarch64_insn_gen_branch_reg(Rn, AARCH64_INSN_BRANCH_LINK)
|
|
#define A64_RET(Rn) aarch64_insn_gen_branch_reg(Rn, AARCH64_INSN_BRANCH_RETURN)
|
|
|
|
/* Load/store register (register offset) */
|
|
#define A64_LS_REG(Rt, Rn, Rm, size, type) \
|
|
aarch64_insn_gen_load_store_reg(Rt, Rn, Rm, \
|
|
AARCH64_INSN_SIZE_##size, \
|
|
AARCH64_INSN_LDST_##type##_REG_OFFSET)
|
|
#define A64_STRB(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 8, STORE)
|
|
#define A64_LDRB(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 8, LOAD)
|
|
#define A64_STRH(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 16, STORE)
|
|
#define A64_LDRH(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 16, LOAD)
|
|
#define A64_STR32(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 32, STORE)
|
|
#define A64_LDR32(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 32, LOAD)
|
|
#define A64_STR64(Xt, Xn, Xm) A64_LS_REG(Xt, Xn, Xm, 64, STORE)
|
|
#define A64_LDR64(Xt, Xn, Xm) A64_LS_REG(Xt, Xn, Xm, 64, LOAD)
|
|
|
|
/* Load/store register pair */
|
|
#define A64_LS_PAIR(Rt, Rt2, Rn, offset, ls, type) \
|
|
aarch64_insn_gen_load_store_pair(Rt, Rt2, Rn, offset, \
|
|
AARCH64_INSN_VARIANT_64BIT, \
|
|
AARCH64_INSN_LDST_##ls##_PAIR_##type)
|
|
/* Rn -= 16; Rn[0] = Rt; Rn[8] = Rt2; */
|
|
#define A64_PUSH(Rt, Rt2, Rn) A64_LS_PAIR(Rt, Rt2, Rn, -16, STORE, PRE_INDEX)
|
|
/* Rt = Rn[0]; Rt2 = Rn[8]; Rn += 16; */
|
|
#define A64_POP(Rt, Rt2, Rn) A64_LS_PAIR(Rt, Rt2, Rn, 16, LOAD, POST_INDEX)
|
|
|
|
/* Load/store exclusive */
|
|
#define A64_SIZE(sf) \
|
|
((sf) ? AARCH64_INSN_SIZE_64 : AARCH64_INSN_SIZE_32)
|
|
#define A64_LSX(sf, Rt, Rn, Rs, type) \
|
|
aarch64_insn_gen_load_store_ex(Rt, Rn, Rs, A64_SIZE(sf), \
|
|
AARCH64_INSN_LDST_##type)
|
|
/* Rt = [Rn]; (atomic) */
|
|
#define A64_LDXR(sf, Rt, Rn) \
|
|
A64_LSX(sf, Rt, Rn, A64_ZR, LOAD_EX)
|
|
/* [Rn] = Rt; (atomic) Rs = [state] */
|
|
#define A64_STXR(sf, Rt, Rn, Rs) \
|
|
A64_LSX(sf, Rt, Rn, Rs, STORE_EX)
|
|
|
|
/* LSE atomics */
|
|
#define A64_STADD(sf, Rn, Rs) \
|
|
aarch64_insn_gen_stadd(Rn, Rs, A64_SIZE(sf))
|
|
|
|
/* Add/subtract (immediate) */
|
|
#define A64_ADDSUB_IMM(sf, Rd, Rn, imm12, type) \
|
|
aarch64_insn_gen_add_sub_imm(Rd, Rn, imm12, \
|
|
A64_VARIANT(sf), AARCH64_INSN_ADSB_##type)
|
|
/* Rd = Rn OP imm12 */
|
|
#define A64_ADD_I(sf, Rd, Rn, imm12) A64_ADDSUB_IMM(sf, Rd, Rn, imm12, ADD)
|
|
#define A64_SUB_I(sf, Rd, Rn, imm12) A64_ADDSUB_IMM(sf, Rd, Rn, imm12, SUB)
|
|
#define A64_ADDS_I(sf, Rd, Rn, imm12) \
|
|
A64_ADDSUB_IMM(sf, Rd, Rn, imm12, ADD_SETFLAGS)
|
|
#define A64_SUBS_I(sf, Rd, Rn, imm12) \
|
|
A64_ADDSUB_IMM(sf, Rd, Rn, imm12, SUB_SETFLAGS)
|
|
/* Rn + imm12; set condition flags */
|
|
#define A64_CMN_I(sf, Rn, imm12) A64_ADDS_I(sf, A64_ZR, Rn, imm12)
|
|
/* Rn - imm12; set condition flags */
|
|
#define A64_CMP_I(sf, Rn, imm12) A64_SUBS_I(sf, A64_ZR, Rn, imm12)
|
|
/* Rd = Rn */
|
|
#define A64_MOV(sf, Rd, Rn) A64_ADD_I(sf, Rd, Rn, 0)
|
|
|
|
/* Bitfield move */
|
|
#define A64_BITFIELD(sf, Rd, Rn, immr, imms, type) \
|
|
aarch64_insn_gen_bitfield(Rd, Rn, immr, imms, \
|
|
A64_VARIANT(sf), AARCH64_INSN_BITFIELD_MOVE_##type)
|
|
/* Signed, with sign replication to left and zeros to right */
|
|
#define A64_SBFM(sf, Rd, Rn, ir, is) A64_BITFIELD(sf, Rd, Rn, ir, is, SIGNED)
|
|
/* Unsigned, with zeros to left and right */
|
|
#define A64_UBFM(sf, Rd, Rn, ir, is) A64_BITFIELD(sf, Rd, Rn, ir, is, UNSIGNED)
|
|
|
|
/* Rd = Rn << shift */
|
|
#define A64_LSL(sf, Rd, Rn, shift) ({ \
|
|
int sz = (sf) ? 64 : 32; \
|
|
A64_UBFM(sf, Rd, Rn, (unsigned)-(shift) % sz, sz - 1 - (shift)); \
|
|
})
|
|
/* Rd = Rn >> shift */
|
|
#define A64_LSR(sf, Rd, Rn, shift) A64_UBFM(sf, Rd, Rn, shift, (sf) ? 63 : 31)
|
|
/* Rd = Rn >> shift; signed */
|
|
#define A64_ASR(sf, Rd, Rn, shift) A64_SBFM(sf, Rd, Rn, shift, (sf) ? 63 : 31)
|
|
|
|
/* Zero extend */
|
|
#define A64_UXTH(sf, Rd, Rn) A64_UBFM(sf, Rd, Rn, 0, 15)
|
|
#define A64_UXTW(sf, Rd, Rn) A64_UBFM(sf, Rd, Rn, 0, 31)
|
|
|
|
/* Move wide (immediate) */
|
|
#define A64_MOVEW(sf, Rd, imm16, shift, type) \
|
|
aarch64_insn_gen_movewide(Rd, imm16, shift, \
|
|
A64_VARIANT(sf), AARCH64_INSN_MOVEWIDE_##type)
|
|
/* Rd = Zeros (for MOVZ);
|
|
* Rd |= imm16 << shift (where shift is {0, 16, 32, 48});
|
|
* Rd = ~Rd; (for MOVN); */
|
|
#define A64_MOVN(sf, Rd, imm16, shift) A64_MOVEW(sf, Rd, imm16, shift, INVERSE)
|
|
#define A64_MOVZ(sf, Rd, imm16, shift) A64_MOVEW(sf, Rd, imm16, shift, ZERO)
|
|
#define A64_MOVK(sf, Rd, imm16, shift) A64_MOVEW(sf, Rd, imm16, shift, KEEP)
|
|
|
|
/* Add/subtract (shifted register) */
|
|
#define A64_ADDSUB_SREG(sf, Rd, Rn, Rm, type) \
|
|
aarch64_insn_gen_add_sub_shifted_reg(Rd, Rn, Rm, 0, \
|
|
A64_VARIANT(sf), AARCH64_INSN_ADSB_##type)
|
|
/* Rd = Rn OP Rm */
|
|
#define A64_ADD(sf, Rd, Rn, Rm) A64_ADDSUB_SREG(sf, Rd, Rn, Rm, ADD)
|
|
#define A64_SUB(sf, Rd, Rn, Rm) A64_ADDSUB_SREG(sf, Rd, Rn, Rm, SUB)
|
|
#define A64_SUBS(sf, Rd, Rn, Rm) A64_ADDSUB_SREG(sf, Rd, Rn, Rm, SUB_SETFLAGS)
|
|
/* Rd = -Rm */
|
|
#define A64_NEG(sf, Rd, Rm) A64_SUB(sf, Rd, A64_ZR, Rm)
|
|
/* Rn - Rm; set condition flags */
|
|
#define A64_CMP(sf, Rn, Rm) A64_SUBS(sf, A64_ZR, Rn, Rm)
|
|
|
|
/* Data-processing (1 source) */
|
|
#define A64_DATA1(sf, Rd, Rn, type) aarch64_insn_gen_data1(Rd, Rn, \
|
|
A64_VARIANT(sf), AARCH64_INSN_DATA1_##type)
|
|
/* Rd = BSWAPx(Rn) */
|
|
#define A64_REV16(sf, Rd, Rn) A64_DATA1(sf, Rd, Rn, REVERSE_16)
|
|
#define A64_REV32(sf, Rd, Rn) A64_DATA1(sf, Rd, Rn, REVERSE_32)
|
|
#define A64_REV64(Rd, Rn) A64_DATA1(1, Rd, Rn, REVERSE_64)
|
|
|
|
/* Data-processing (2 source) */
|
|
/* Rd = Rn OP Rm */
|
|
#define A64_DATA2(sf, Rd, Rn, Rm, type) aarch64_insn_gen_data2(Rd, Rn, Rm, \
|
|
A64_VARIANT(sf), AARCH64_INSN_DATA2_##type)
|
|
#define A64_UDIV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, UDIV)
|
|
#define A64_LSLV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, LSLV)
|
|
#define A64_LSRV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, LSRV)
|
|
#define A64_ASRV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, ASRV)
|
|
|
|
/* Data-processing (3 source) */
|
|
/* Rd = Ra + Rn * Rm */
|
|
#define A64_MADD(sf, Rd, Ra, Rn, Rm) aarch64_insn_gen_data3(Rd, Ra, Rn, Rm, \
|
|
A64_VARIANT(sf), AARCH64_INSN_DATA3_MADD)
|
|
/* Rd = Ra - Rn * Rm */
|
|
#define A64_MSUB(sf, Rd, Ra, Rn, Rm) aarch64_insn_gen_data3(Rd, Ra, Rn, Rm, \
|
|
A64_VARIANT(sf), AARCH64_INSN_DATA3_MSUB)
|
|
/* Rd = Rn * Rm */
|
|
#define A64_MUL(sf, Rd, Rn, Rm) A64_MADD(sf, Rd, A64_ZR, Rn, Rm)
|
|
|
|
/* Logical (shifted register) */
|
|
#define A64_LOGIC_SREG(sf, Rd, Rn, Rm, type) \
|
|
aarch64_insn_gen_logical_shifted_reg(Rd, Rn, Rm, 0, \
|
|
A64_VARIANT(sf), AARCH64_INSN_LOGIC_##type)
|
|
/* Rd = Rn OP Rm */
|
|
#define A64_AND(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, AND)
|
|
#define A64_ORR(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, ORR)
|
|
#define A64_EOR(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, EOR)
|
|
#define A64_ANDS(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, AND_SETFLAGS)
|
|
/* Rn & Rm; set condition flags */
|
|
#define A64_TST(sf, Rn, Rm) A64_ANDS(sf, A64_ZR, Rn, Rm)
|
|
|
|
/* Logical (immediate) */
|
|
#define A64_LOGIC_IMM(sf, Rd, Rn, imm, type) ({ \
|
|
u64 imm64 = (sf) ? (u64)imm : (u64)(u32)imm; \
|
|
aarch64_insn_gen_logical_immediate(AARCH64_INSN_LOGIC_##type, \
|
|
A64_VARIANT(sf), Rn, Rd, imm64); \
|
|
})
|
|
/* Rd = Rn OP imm */
|
|
#define A64_AND_I(sf, Rd, Rn, imm) A64_LOGIC_IMM(sf, Rd, Rn, imm, AND)
|
|
#define A64_ORR_I(sf, Rd, Rn, imm) A64_LOGIC_IMM(sf, Rd, Rn, imm, ORR)
|
|
#define A64_EOR_I(sf, Rd, Rn, imm) A64_LOGIC_IMM(sf, Rd, Rn, imm, EOR)
|
|
#define A64_ANDS_I(sf, Rd, Rn, imm) A64_LOGIC_IMM(sf, Rd, Rn, imm, AND_SETFLAGS)
|
|
/* Rn & imm; set condition flags */
|
|
#define A64_TST_I(sf, Rn, imm) A64_ANDS_I(sf, A64_ZR, Rn, imm)
|
|
|
|
/* HINTs */
|
|
#define A64_HINT(x) aarch64_insn_gen_hint(x)
|
|
|
|
/* BTI */
|
|
#define A64_BTI_C A64_HINT(AARCH64_INSN_HINT_BTIC)
|
|
#define A64_BTI_J A64_HINT(AARCH64_INSN_HINT_BTIJ)
|
|
#define A64_BTI_JC A64_HINT(AARCH64_INSN_HINT_BTIJC)
|
|
|
|
#endif /* _BPF_JIT_H */
|