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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: Julien 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: Will Deacon <will@kernel.org>
This commit is contained in:
Julien Thierry 2021-03-03 18:05:34 +01:00 committed by Will Deacon
parent 427bfc59e2
commit d4b217330d
1 changed files with 21 additions and 0 deletions
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21
arch/arm64/include/asm/insn.h
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@ -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);