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From: Jerin Jacob <jerin.jacob@caviumnetworks.com>
To: Chao Zhu <chaozhu@linux.vnet.ibm.com>
Cc: dev@dpdk.org, thomas@monjalon.net, gowrishankar.m@linux.vnet.ibm.com,
ola.liljedahl@arm.com, Jerin Jacob <jerin.jacob@caviumnetworks.com>
Date: Sun, 7 Oct 2018 11:48:57 +0530
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Subject: [dpdk-dev] [PATCH] eal/ppc64: add support for rte pause
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Add support for rte_pause() implementation for ppc64.
Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
---
The reference implementation for Linux's cpu_relax() for ppc64 is at
https://elixir.bootlin.com/linux/latest/source/arch/powerpc/include/asm/processor.h#L440
---
lib/librte_eal/common/include/arch/ppc_64/rte_pause.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/lib/librte_eal/common/include/arch/ppc_64/rte_pause.h b/lib/librte_eal/common/include/arch/ppc_64/rte_pause.h
index 8bd835764..16e47ce22 100644
--- a/lib/librte_eal/common/include/arch/ppc_64/rte_pause.h
+++ b/lib/librte_eal/common/include/arch/ppc_64/rte_pause.h
@@ -9,10 +9,17 @@
extern "C" {
#endif
+#include "rte_atomic.h"
+
#include "generic/rte_pause.h"
static inline void rte_pause(void)
{
+ /* Set hardware multi-threading low priority */
+ asm volatile("or 1,1,1");
+ /* Set hardware multi-threading medium priority */
+ asm volatile("or 2,2,2");
+ rte_compiler_barrier();
}
#ifdef __cplusplus
--
2.19.0