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From: Julien Thierry <jthierry@redhat.com>
To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: catalin.marinas@arm.com, will@kernel.org, mark.rutland@arm.com,
	broonie@kernel.org, ycote@redhat.com,
	Julien Thierry <jthierry@redhat.com>
Subject: [RFC PATCH v2 6/8] arm64: insn: Add barrier encodings
Date: Wed,  3 Mar 2021 18:05:34 +0100	[thread overview]
Message-ID: <20210303170536.1838032-7-jthierry@redhat.com> (raw)
In-Reply-To: <20210303170536.1838032-1-jthierry@redhat.com>

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>
---
 arch/arm64/include/asm/insn.h | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h
index b55b629c5eab..185f52ef0228 100644
--- a/arch/arm64/include/asm/insn.h
+++ b/arch/arm64/include/asm/insn.h
@@ -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 +389,20 @@ 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) && (insn & 0xb00)) ||
+		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);
-- 
2.25.4


WARNING: multiple messages have this Message-ID (diff)
From: Julien Thierry <jthierry@redhat.com>
To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: catalin.marinas@arm.com, will@kernel.org, mark.rutland@arm.com,
	broonie@kernel.org, ycote@redhat.com,
	Julien Thierry <jthierry@redhat.com>
Subject: [RFC PATCH v2 6/8] arm64: insn: Add barrier encodings
Date: Wed,  3 Mar 2021 18:05:34 +0100	[thread overview]
Message-ID: <20210303170536.1838032-7-jthierry@redhat.com> (raw)
In-Reply-To: <20210303170536.1838032-1-jthierry@redhat.com>

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>
---
 arch/arm64/include/asm/insn.h | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h
index b55b629c5eab..185f52ef0228 100644
--- a/arch/arm64/include/asm/insn.h
+++ b/arch/arm64/include/asm/insn.h
@@ -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 +389,20 @@ 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) && (insn & 0xb00)) ||
+		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);
-- 
2.25.4


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  parent reply	other threads:[~2021-03-03 19:28 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-03 17:05 [RFC PATCH v2 0/8] arm64: Prepare instruction decoder for objtool Julien Thierry
2021-03-03 17:05 ` Julien Thierry
2021-03-03 17:05 ` [RFC PATCH v2 1/8] arm64: Move patching utilities out of instruction encoding/decoding Julien Thierry
2021-03-03 17:05   ` Julien Thierry
2021-03-03 17:05 ` [RFC PATCH v2 2/8] arm64: Move aarch32 condition check functions Julien Thierry
2021-03-03 17:05   ` Julien Thierry
2021-03-03 17:05 ` [RFC PATCH v2 3/8] arm64: insn: Reduce header dependencies of instruction decoder Julien Thierry
2021-03-03 17:05   ` Julien Thierry
2021-03-03 17:05 ` [RFC PATCH v2 4/8] arm64: Move instruction encoder/decoder under lib/ Julien Thierry
2021-03-03 17:05   ` Julien Thierry
2021-03-03 17:05 ` [RFC PATCH v2 5/8] arm64: insn: Add SVE instruction class Julien Thierry
2021-03-03 17:05   ` Julien Thierry
2021-03-03 17:05 ` Julien Thierry [this message]
2021-03-03 17:05   ` [RFC PATCH v2 6/8] arm64: insn: Add barrier encodings Julien Thierry
2021-03-03 17:05 ` [RFC PATCH v2 7/8] arm64: insn: Add some opcodes to instruction decoder Julien Thierry
2021-03-03 17:05   ` Julien Thierry
2021-03-03 17:05 ` [RFC PATCH v2 8/8] arm64: insn: Add load/store decoding helpers Julien Thierry
2021-03-03 17:05   ` Julien Thierry

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