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[XTF PATCH v1 09/15] x86: introduce cpu_relax()
- To: xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: dmukhin@xxxxxxxx
- Date: Wed, 4 Nov 2026 17:38:11 -0800
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- Cc: andrew.cooper3@xxxxxxxxxx, anthony.perard@xxxxxxxxxx, jbeulich@xxxxxxxx, julien@xxxxxxx, michal.orzel@xxxxxxx, roger@xxxxxxxxxxxxxx, sstabellini@xxxxxxxxxx, dmukhin@xxxxxxx, Denis Mukhin <dmukhin@xxxxxxxx>
- Delivery-date: Thu, 05 Nov 2026 01:38:56 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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From: Denis Mukhin <dmukhin@xxxxxxxx>
Signed-off-by: Denis Mukhin <dmukhin@xxxxxxxx>
---
arch/x86/include/arch/processor.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/include/arch/processor.h
b/arch/x86/include/arch/processor.h
index 9cf2fe08669f..9db352f18c7c 100644
--- a/arch/x86/include/arch/processor.h
+++ b/arch/x86/include/arch/processor.h
@@ -190,6 +190,9 @@
#define X86_SEL_GDT 0
#define X86_SEL_LDT X86_SEL_TI
+/* Pause for busy-wait loops. */
+#define cpu_relax() asm volatile ( "pause" ::: "memory" )
+
#endif /* XTF_X86_PROCESSOR_H */
/*
--
2.55.0
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