Required for UART drivers.
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
inmates/lib/arm/include/inmate.h | 5 +++++
inmates/lib/arm64/include/inmate.h | 5 +++++
2 files changed, 10 insertions(+)
diff --git a/inmates/lib/arm/include/inmate.h b/inmates/lib/arm/include/inmate.h
index f6f62a4..e6df64e 100644
--- a/inmates/lib/arm/include/inmate.h
+++ b/inmates/lib/arm/include/inmate.h
@@ -36,6 +36,11 @@ static inline void mmio_write32(void *address, u32 value)
*(volatile u32 *)address = value;
}
+static inline void cpu_relax(void)
+{
+ asm volatile("" : : : "memory");
+}
+
/*
* To ease the debugging, we can send a spurious hypercall, which should return
* -ENOSYS, but appear in the hypervisor stats for this cell.
diff --git a/inmates/lib/arm64/include/inmate.h
b/inmates/lib/arm64/include/inmate.h
index f869833..91f1729 100644
--- a/inmates/lib/arm64/include/inmate.h
+++ b/inmates/lib/arm64/include/inmate.h
@@ -36,6 +36,11 @@ static inline void mmio_write32(void *address, u32 value)
*(volatile u32 *)address = value;
}
+static inline void cpu_relax(void)
+{
+ asm volatile("" : : : "memory");
+}
+
/*
* To ease the debugging, we can send a spurious hypercall, which should return
* -ENOSYS, but appear in the hypervisor stats for this cell.
--
2.1.4
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