The default generic barriers are not correct for ARM64. This results in
data corruption. The correct macros are lifted from the linux kernel.
Signed-off-by: Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>
---
I wonder why the linux kernel doesn't export these? Also, if the hw
platform is unknown, I don't think libibverbs should pick a default
implementation that might cause data corruption. Rather, I think it
should just fail a compile on that platform.
Thoughts?
---
include/infiniband/arch.h | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/include/infiniband/arch.h b/include/infiniband/arch.h
index bc1738a..71f02f8 100644
--- a/include/infiniband/arch.h
+++ b/include/infiniband/arch.h
@@ -122,6 +122,15 @@ static inline uint64_t ntohll(uint64_t x) { return x; }
#define wmb() mb() /* for s390x */
#define wc_wmb() wmb() /* for s390x */
+#elif defined(__aarch64__)
+
+#define dsb(opt) asm volatile("dsb " #opt : : : "memory")
+
+#define mb() dsb(sy)
+#define rmb() dsb(ld)
+#define wmb() dsb(st)
+#define wc_wmb() wmb()
+
#else
#warning No architecture specific defines found. Using generic implementation.
--
1.7.1
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