[SPARC64]: Add sun4v_cpu_yield().

Signed-off-by: N David S. Miller <davem@davemloft.net>

[SPARC64]: Add sun4v_cpu_yield().
Signed-off-by: N David S. Miller <davem@davemloft.net>
6f5374c9 · David S. Miller · 1bd0cd74 · 6f5374c9 · 6f5374c9
隐藏空白更改
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arch/sparc64/kernel/entry.S arch/sparc64/kernel/entry.S +9 -0

include/asm-sparc64/hypervisor.h include/asm-sparc64/hypervisor.h +3 -0

未找到文件。
--- a/arch/sparc64/kernel/entry.S
+++ b/arch/sparc64/kernel/entry.S
@@ -1786,3 +1786,12 @@ sun4v_cpu_qconf:
 	ta	HV_FAST_TRAP
 	retl
 	 nop
+
+	/* returns %o0:	status
+	 */
+	.globl	sun4v_cpu_yield
+sun4v_cpu_yield:
+	mov	HV_FAST_CPU_YIELD, %o5
+	ta	HV_FAST_TRAP
+	retl
+	 nop
--- a/include/asm-sparc64/hypervisor.h
+++ b/include/asm-sparc64/hypervisor.h
@@ -258,6 +258,9 @@
 */
 #define HV_FAST_CPU_YIELD		0x12

+#ifndef __ASSEMBLY__
+extern unsigned long sun4v_cpu_yield(void);
+#endif

 /* cpu_qconf()
 * TRAP:	HV_FAST_TRAP