linux-kernel - [PATCH] arm64: ptrace: Use ARM64_SME to guard the SME register enumerations

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Date:   Wed, 14 Dec 2022 21:59:43 +0800
From:   Zenghui Yu <yuzenghui@...wei.com>
To:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <oleg@...hat.com>, <catalin.marinas@....com>, <will@...nel.org>,
        <broonie@...nel.org>, <wanghaibin.wang@...wei.com>,
        <zhouquan65@...wei.com>, <sundongxu3@...wei.com>,
        Zenghui Yu <yuzenghui@...wei.com>
Subject: [PATCH] arm64: ptrace: Use ARM64_SME to guard the SME register enumerations

We currently guard REGSET_{SSVE, ZA} using ARM64_SVE for no good reason.
Both enumerations would be pointless without ARM64_SME and create two empty
entries in aarch64_regsets[] which would then become part of a process's
native regset view (they should be ignored though).

Switch to use ARM64_SME instead.

Fixes: e12310a0d30f ("arm64/sme: Implement ptrace support for streaming mode SVE registers")
Signed-off-by: Zenghui Yu <yuzenghui@...wei.com>
---
 arch/arm64/kernel/ptrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index 2686ab157601..0c321ad23cd3 100644
--- a/arch/arm64/kernel/ptrace.c
+++ b/arch/arm64/kernel/ptrace.c
@@ -1357,7 +1357,7 @@ enum aarch64_regset {
 #ifdef CONFIG_ARM64_SVE
 	REGSET_SVE,
 #endif
-#ifdef CONFIG_ARM64_SVE
+#ifdef CONFIG_ARM64_SME
 	REGSET_SSVE,
 	REGSET_ZA,
 #endif
-- 
2.33.0