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membarrier/arm64: Provide core serializing command

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Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrea Parri <parri.andrea@gmail.com>
Cc: Andrew Hunter <ahh@google.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Avi Kivity <avi@scylladb.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Dave Watson <davejwatson@fb.com>
Cc: David Sehr <sehr@google.com>
Cc: Greg Hackmann <ghackmann@google.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Maged Michael <maged.michael@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-api@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Link: http://lkml.kernel.org/r/20180129202020.8515-11-mathieu.desnoyers@efficios.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Mathieu Desnoyers 2018-01-29 15:20:19 -05:00 committed by Ingo Molnar
parent 10bcc80e9d
commit f1e3a12b65
2 changed files with 5 additions and 0 deletions
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1
arch/arm64/Kconfig
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@ -16,6 +16,7 @@ config ARM64
select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
select ARCH_HAS_KCOV select ARCH_HAS_KCOV
select ARCH_HAS_MEMBARRIER_SYNC_CORE
select ARCH_HAS_SET_MEMORY select ARCH_HAS_SET_MEMORY
select ARCH_HAS_SG_CHAIN select ARCH_HAS_SG_CHAIN
select ARCH_HAS_STRICT_KERNEL_RWX select ARCH_HAS_STRICT_KERNEL_RWX

4
arch/arm64/kernel/entry.S
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@ -302,6 +302,10 @@ alternative_else_nop_endif
ldp x28, x29, [sp, #16 * 14] ldp x28, x29, [sp, #16 * 14]
ldr lr, [sp, #S_LR] ldr lr, [sp, #S_LR]
add sp, sp, #S_FRAME_SIZE // restore sp add sp, sp, #S_FRAME_SIZE // restore sp
/*
* ARCH_HAS_MEMBARRIER_SYNC_CORE rely on eret context synchronization
* when returning from IPI handler, and when returning to user-space.
*/
eret // return to kernel eret // return to kernel
.endm .endm