Commit d4b21733 authored by Julien Thierry's avatar Julien Thierry Committed by Will Deacon
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arm64: insn: Add barrier encodings 



Create necessary functions to encode/decode aarch64 barrier
instructions.

DSB needs special case handling as it has multiple encodings.

Signed-off-by: default avatarJulien Thierry <jthierry@redhat.com>
Link: https://lore.kernel.org/r/20210303170536.1838032-7-jthierry@redhat.com


[will: Don't reject DSB #4]
Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 427bfc59

arch/arm64/include/asm/insn.h

+21 −0
Original line number Diff line number Diff line
@@ -370,6 +370,14 @@ __AARCH64_INSN_FUNCS(eret_auth, 0xFFFFFBFF, 0xD69F0BFF) 
__AARCH64_INSN_FUNCS(mrs,	0xFFF00000, 0xD5300000)

__AARCH64_INSN_FUNCS(msr_imm,	0xFFF8F01F, 0xD500401F)

__AARCH64_INSN_FUNCS(msr_reg,	0xFFF00000, 0xD5100000)

__AARCH64_INSN_FUNCS(dmb,	0xFFFFF0FF, 0xD50330BF)

__AARCH64_INSN_FUNCS(dsb_base,	0xFFFFF0FF, 0xD503309F)

__AARCH64_INSN_FUNCS(dsb_nxs,	0xFFFFF3FF, 0xD503323F)

__AARCH64_INSN_FUNCS(isb,	0xFFFFF0FF, 0xD50330DF)

__AARCH64_INSN_FUNCS(sb,	0xFFFFFFFF, 0xD50330FF)

__AARCH64_INSN_FUNCS(clrex,	0xFFFFF0FF, 0xD503305F)

__AARCH64_INSN_FUNCS(ssbb,	0xFFFFFFFF, 0xD503309F)

__AARCH64_INSN_FUNCS(pssbb,	0xFFFFFFFF, 0xD503349F)



#undef	__AARCH64_INSN_FUNCS
@@ -381,6 +389,19 @@ static inline bool aarch64_insn_is_adr_adrp(u32 insn) 
	return aarch64_insn_is_adr(insn) || aarch64_insn_is_adrp(insn);

}



static inline bool aarch64_insn_is_dsb(u32 insn)

{

	return aarch64_insn_is_dsb_base(insn) || aarch64_insn_is_dsb_nxs(insn);

}



static inline bool aarch64_insn_is_barrier(u32 insn)

{

	return aarch64_insn_is_dmb(insn) || aarch64_insn_is_dsb(insn) ||

	       aarch64_insn_is_isb(insn) || aarch64_insn_is_sb(insn) ||

	       aarch64_insn_is_clrex(insn) || aarch64_insn_is_ssbb(insn) ||

	       aarch64_insn_is_pssbb(insn);

}



enum aarch64_insn_encoding_class aarch64_get_insn_class(u32 insn);

bool aarch64_insn_uses_literal(u32 insn);

bool aarch64_insn_is_branch(u32 insn);