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Message-Id: <20230109135828.879136-6-mark.rutland@arm.com>
Date: Mon, 9 Jan 2023 13:58:25 +0000
From: Mark Rutland <mark.rutland@....com>
To: linux-arm-kernel@...ts.infradead.org
Cc: catalin.marinas@....com, lenb@...nel.org,
linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
mark.rutland@....com, mhiramat@...nel.org, ndesaulniers@...gle.com,
ojeda@...nel.org, peterz@...radead.org, rafael.j.wysocki@...el.com,
revest@...omium.org, robert.moore@...el.com, rostedt@...dmis.org,
will@...nel.org
Subject: [PATCH 5/8] arm64: insn: Add helpers for BTI
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@....com>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Florent Revest <revest@...omium.org>
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Will Deacon <will@...nel.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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