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-rw-r--r--arch/arm/include/asm/virt.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/include/asm/virt.h b/arch/arm/include/asm/virt.h
index 50af92bac73..4371f45c578 100644
--- a/arch/arm/include/asm/virt.h
+++ b/arch/arm/include/asm/virt.h
@@ -29,6 +29,7 @@
#define BOOT_CPU_MODE_MISMATCH PSR_N_BIT
#ifndef __ASSEMBLY__
+#include <asm/cacheflush.h>
#ifdef CONFIG_ARM_VIRT_EXT
/*
@@ -41,10 +42,21 @@
*/
extern int __boot_cpu_mode;
+static inline void sync_boot_mode(void)
+{
+ /*
+ * As secondaries write to __boot_cpu_mode with caches disabled, we
+ * must flush the corresponding cache entries to ensure the visibility
+ * of their writes.
+ */
+ sync_cache_r(&__boot_cpu_mode);
+}
+
void __hyp_set_vectors(unsigned long phys_vector_base);
unsigned long __hyp_get_vectors(void);
#else
#define __boot_cpu_mode (SVC_MODE)
+#define sync_boot_mode()
#endif
#ifndef ZIMAGE