diff mbox series

[RFC,v2,09/11] powerpc/32: add helper to write into segment registers

Message ID 5b09cecccb64a577ee9c0cdef3b294ccd7f2ee70.1543356926.git.christophe.leroy@c-s.fr (mailing list archive)
State RFC
Headers show
Series [v2,01/11] powerpc/mm: Fix reporting of kernel execute faults on the 8xx | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success next/apply_patch Successfully applied
snowpatch_ozlabs/checkpatch warning total: 0 errors, 1 warnings, 0 checks, 11 lines checked

Commit Message

Christophe Leroy Nov. 28, 2018, 9:27 a.m. UTC 
This patch add an helper which wraps 'mtsrin' instruction
to write into segment registers.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/include/asm/reg.h | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index d9598e6790d8..6b5d2a61af5a 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -1424,6 +1424,11 @@  static inline void msr_check_and_clear(unsigned long bits)
 #define mfsrin(v)	({unsigned int rval; \
 			asm volatile("mfsrin %0,%1" : "=r" (rval) : "r" (v)); \
 					rval;})
+
+static inline void mtsrin(u32 val, u32 idx)
+{
+	asm volatile("mtsrin %0, %1" : : "r" (val), "r" (idx));
+}
 #endif
 
 #define proc_trap()	asm volatile("trap")