From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
ruscur@russell.cc
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [RFC PATCH v2 09/11] powerpc/32: add helper to write into segment registers
Date: Wed, 28 Nov 2018 09:27:20 +0000 (UTC) [thread overview]
Message-ID: <5b09cecccb64a577ee9c0cdef3b294ccd7f2ee70.1543356926.git.christophe.leroy@c-s.fr> (raw)
In-Reply-To: <76d777b36e54e7b8d4c196405decc712fc5eaf45.1543356926.git.christophe.leroy@c-s.fr>
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 --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")
--
2.13.3
next prev parent reply other threads:[~2018-11-28 9:27 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-28 9:27 [PATCH v2 01/11] powerpc/mm: Fix reporting of kernel execute faults on the 8xx Christophe Leroy
2018-11-28 9:27 ` [RFC PATCH v2 02/11] powerpc: Add framework for Kernel Userspace Protection Christophe Leroy
2018-11-28 9:27 ` [RFC PATCH v2 03/11] powerpc: Add skeleton for Kernel Userspace Execution Prevention Christophe Leroy
2018-11-28 9:27 ` [RFC PATCH v2 04/11] powerpc/mm: Add a framework for Kernel Userspace Access Protection Christophe Leroy
2018-12-21 5:07 ` Michael Ellerman
2018-12-21 6:48 ` Christophe Leroy
2018-11-28 9:27 ` [RFC PATCH v2 05/11] powerpc/8xx: Add Kernel Userspace Execution Prevention Christophe Leroy
2018-11-28 9:27 ` [RFC PATCH v2 06/11] powerpc/8xx: Add Kernel Userspace Access Protection Christophe Leroy
2018-11-28 9:27 ` [RFC PATCH v2 07/11] powerpc/mm/radix: Use KUEP API for Radix MMU Russell Currey
2018-11-28 9:43 ` Christophe Leroy
2018-11-28 9:46 ` Christophe LEROY
2018-11-28 9:27 ` [RFC PATCH v2 08/11] powerpc/64s: Implement KUAP " Russell Currey
2018-11-28 9:43 ` Christophe Leroy
2018-11-28 9:27 ` Christophe Leroy [this message]
2018-11-28 9:27 ` [RFC PATCH v2 10/11] powerpc/book3s32: Prepare Kernel Userspace Access Protection Christophe Leroy
2018-11-28 9:27 ` [RFC PATCH v2 11/11] powerpc/book3s32: Implement " Christophe Leroy
2018-12-11 5:25 ` Russell Currey
2018-12-11 20:46 ` Christophe Leroy
2018-12-23 13:27 ` [v2, 01/11] powerpc/mm: Fix reporting of kernel execute faults on the 8xx Michael Ellerman
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