linux_dsm_epyc7002/barriers.h at 0240d562d0b11e369e3e4af6fe8e6c607bc35d4c - linux_dsm_epyc7002 - Cephas TEA

AuxXxilium/linux_dsm_epyc7002

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Catalin Marinas a904f5f9eb ARM: 6870/1: The mandatory barrier rmb() must be a dsb() in for device accesses

Since mandatory barriers may be used (explicitly or implicitly via readl
etc.) to ensure the ordering between Device and Normal memory accesses,
a DMB is not enough. This patch converts it to a DSB.

Cc: Colin Cross <ccross@android.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2011-05-12 10:52:00 +01:00

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 /*
  * Barriers redefined for RealView ARM11MPCore platforms with L220 cache
  * controller to work around hardware errata causing the outer_sync()
  * operation to deadlock the system.
  */
 #define mb()		dsb()
 #define rmb()		dsb()
 #define wmb()		mb()