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From: Mark Rutland <mark.rutland@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: catalin.marinas@arm.com, lenb@kernel.org,
	linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
	mark.rutland@arm.com, mhiramat@kernel.org,
	ndesaulniers@google.com, ojeda@kernel.org, peterz@infradead.org,
	rafael.j.wysocki@intel.com, revest@chromium.org,
	robert.moore@intel.com, rostedt@goodmis.org, will@kernel.org
Subject: [PATCH 5/8] arm64: insn: Add helpers for BTI
Date: Mon,  9 Jan 2023 13:58:25 +0000	[thread overview]
Message-ID: <20230109135828.879136-6-mark.rutland@arm.com> (raw)
In-Reply-To: <20230109135828.879136-1-mark.rutland@arm.com>

In subsequent patches we'd like to check whether an instruction is a
BTI. In preparation for this, add basic instruction helpers for BTI
instructions.

Per ARM DDI 0487H.a section C6.2.41, BTI is encoded in binary as
follows, MSB to LSB:

  1101 0101 000 0011 0010 0100 xx01 1111

Where the `xx` bits encode J/C/JC:

  00 : (omitted)
  01 : C
  10 : J
  11 : JC

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Florent Revest <revest@chromium.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Will Deacon <will@kernel.org>
---
 arch/arm64/include/asm/insn.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h
index aaf1f52fbf3e0..139a88e4e8522 100644
--- a/arch/arm64/include/asm/insn.h
+++ b/arch/arm64/include/asm/insn.h
@@ -420,6 +420,7 @@ __AARCH64_INSN_FUNCS(sb,	0xFFFFFFFF, 0xD50330FF)
 __AARCH64_INSN_FUNCS(clrex,	0xFFFFF0FF, 0xD503305F)
 __AARCH64_INSN_FUNCS(ssbb,	0xFFFFFFFF, 0xD503309F)
 __AARCH64_INSN_FUNCS(pssbb,	0xFFFFFFFF, 0xD503349F)
+__AARCH64_INSN_FUNCS(bti,	0xFFFFFF3F, 0xD503241f)
 
 #undef	__AARCH64_INSN_FUNCS
 
-- 
2.30.2


WARNING: multiple messages have this Message-ID (diff)
From: Mark Rutland <mark.rutland@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: catalin.marinas@arm.com, lenb@kernel.org,
	linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
	mark.rutland@arm.com, mhiramat@kernel.org,
	ndesaulniers@google.com, ojeda@kernel.org, peterz@infradead.org,
	rafael.j.wysocki@intel.com, revest@chromium.org,
	robert.moore@intel.com, rostedt@goodmis.org, will@kernel.org
Subject: [PATCH 5/8] arm64: insn: Add helpers for BTI
Date: Mon,  9 Jan 2023 13:58:25 +0000	[thread overview]
Message-ID: <20230109135828.879136-6-mark.rutland@arm.com> (raw)
In-Reply-To: <20230109135828.879136-1-mark.rutland@arm.com>

In subsequent patches we'd like to check whether an instruction is a
BTI. In preparation for this, add basic instruction helpers for BTI
instructions.

Per ARM DDI 0487H.a section C6.2.41, BTI is encoded in binary as
follows, MSB to LSB:

  1101 0101 000 0011 0010 0100 xx01 1111

Where the `xx` bits encode J/C/JC:

  00 : (omitted)
  01 : C
  10 : J
  11 : JC

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Florent Revest <revest@chromium.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Will Deacon <will@kernel.org>
---
 arch/arm64/include/asm/insn.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h
index aaf1f52fbf3e0..139a88e4e8522 100644
--- a/arch/arm64/include/asm/insn.h
+++ b/arch/arm64/include/asm/insn.h
@@ -420,6 +420,7 @@ __AARCH64_INSN_FUNCS(sb,	0xFFFFFFFF, 0xD50330FF)
 __AARCH64_INSN_FUNCS(clrex,	0xFFFFF0FF, 0xD503305F)
 __AARCH64_INSN_FUNCS(ssbb,	0xFFFFFFFF, 0xD503309F)
 __AARCH64_INSN_FUNCS(pssbb,	0xFFFFFFFF, 0xD503349F)
+__AARCH64_INSN_FUNCS(bti,	0xFFFFFF3F, 0xD503241f)
 
 #undef	__AARCH64_INSN_FUNCS
 
-- 
2.30.2


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  parent reply	other threads:[~2023-01-09 14:00 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-09 13:58 [PATCH 0/8] arm64/ftrace: Add support for DYNAMIC_FTRACE_WITH_CALL_OPS Mark Rutland
2023-01-09 13:58 ` Mark Rutland
2023-01-09 13:58 ` [PATCH 1/8] Compiler attributes: GCC function alignment workarounds Mark Rutland
2023-01-09 13:58   ` Mark Rutland
2023-01-09 14:43   ` Miguel Ojeda
2023-01-09 14:43     ` Miguel Ojeda
2023-01-09 17:06     ` Mark Rutland
2023-01-09 17:06       ` Mark Rutland
2023-01-09 22:35       ` Miguel Ojeda
2023-01-09 22:35         ` Miguel Ojeda
2023-01-11 18:27     ` Mark Rutland
2023-01-11 18:27       ` Mark Rutland
2023-01-12 11:38       ` Mark Rutland
2023-01-12 11:38         ` Mark Rutland
2023-01-13 12:49         ` Mark Rutland
2023-01-13 12:49           ` Mark Rutland
2023-01-15 21:32           ` Miguel Ojeda
2023-01-15 21:32             ` Miguel Ojeda
2023-01-09 13:58 ` [PATCH 2/8] ACPI: Don't build ACPICA with '-Os' Mark Rutland
2023-01-09 13:58   ` Mark Rutland
2023-01-09 18:30   ` kernel test robot
2023-01-10 15:40     ` Mark Rutland
2023-01-10 13:45   ` Rafael J. Wysocki
2023-01-10 13:45     ` Rafael J. Wysocki
2023-01-09 13:58 ` [PATCH 3/8] arm64: Extend support for CONFIG_FUNCTION_ALIGNMENT Mark Rutland
2023-01-09 13:58   ` Mark Rutland
2023-01-10 20:35   ` Peter Zijlstra
2023-01-10 20:35     ` Peter Zijlstra
2023-01-10 20:43     ` Will Deacon
2023-01-10 20:43       ` Will Deacon
2023-01-11 11:39       ` Mark Rutland
2023-01-11 11:39         ` Mark Rutland
2023-01-11 11:36     ` Mark Rutland
2023-01-11 11:36       ` Mark Rutland
2023-01-09 13:58 ` [PATCH 4/8] ftrace: Add DYNAMIC_FTRACE_WITH_CALL_OPS Mark Rutland
2023-01-09 13:58   ` Mark Rutland
2023-01-09 17:39   ` kernel test robot
2023-01-09 19:10   ` kernel test robot
2023-01-12  6:48   ` Li Huafei
2023-01-12  6:48     ` Li Huafei
2023-01-12 11:00     ` Mark Rutland
2023-01-12 11:00       ` Mark Rutland
2023-01-13  1:15       ` Li Huafei
2023-01-13  1:15         ` Li Huafei
2023-01-09 13:58 ` Mark Rutland [this message]
2023-01-09 13:58   ` [PATCH 5/8] arm64: insn: Add helpers for BTI Mark Rutland
2023-01-09 13:58 ` [PATCH 6/8] arm64: patching: Add aarch64_insn_write_literal_u64() Mark Rutland
2023-01-09 13:58   ` Mark Rutland
2023-01-09 13:58 ` [PATCH 7/8] arm64: ftrace: Update stale comment Mark Rutland
2023-01-09 13:58   ` Mark Rutland
2023-01-09 13:58 ` [PATCH 8/8] arm64: Implement HAVE_DYNAMIC_FTRACE_WITH_CALL_OPS Mark Rutland
2023-01-09 13:58   ` Mark Rutland
2023-01-10  8:55 ` [PATCH 0/8] arm64/ftrace: Add support for DYNAMIC_FTRACE_WITH_CALL_OPS David Laight
2023-01-10  8:55   ` David Laight
2023-01-10 10:31   ` Mark Rutland
2023-01-10 10:31     ` Mark Rutland

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