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From:   Max Filippov <jcmvbkbc@gmail.com>
To:     linux-xtensa@linux-xtensa.org
Cc:     Chris Zankel <chris@zankel.net>, linux-kernel@vger.kernel.org,
        Max Filippov <jcmvbkbc@gmail.com>
Subject: [PATCH 5/6] xtensa: add xtensa_xsr macro
Date:   Fri, 15 Apr 2022 21:25:58 -0700
Message-Id: <20220416042559.2035015-6-jcmvbkbc@gmail.com>
In-Reply-To: <20220416042559.2035015-1-jcmvbkbc@gmail.com>
References: <20220416042559.2035015-1-jcmvbkbc@gmail.com>
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xtensa_xsr does the XSR instruction for the specified special register.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
---
 arch/xtensa/include/asm/processor.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h
index 4489a27d527a..76bc63127c66 100644
--- a/arch/xtensa/include/asm/processor.h
+++ b/arch/xtensa/include/asm/processor.h
@@ -246,6 +246,13 @@ extern unsigned long __get_wchan(struct task_struct *p);
 	 v; \
 	 })
 
+#define xtensa_xsr(x, sr) \
+	({ \
+	 unsigned int __v__ = (unsigned int)(x); \
+	 __asm__ __volatile__ ("xsr %0, " __stringify(sr) : "+a"(__v__)); \
+	 __v__; \
+	 })
+
 #if XCHAL_HAVE_EXTERN_REGS
 
 static inline void set_er(unsigned long value, unsigned long addr)
-- 
2.30.2