ARM: earlier initialization of vectors page
Initialize the contents of the vectors page immediately after we
allocate the page, but before we map it. This avoids any possible
aliases with other mappings which may need to be flushed after the
page has been mapped irrespective of the cache type.
We follow this later with a flush_cache_all() after all static memory
mappings have been initialized, which ensures that this is safe from
any cache effects.
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 99a5727..be15daf 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -781,18 +781,16 @@
memcpy((void *)vectors + 0xfe0, (void *)vectors + 0xfe8, 4);
}
-void __init early_trap_init(void)
+void __init early_trap_init(void *vectors_base)
{
-#if defined(CONFIG_CPU_USE_DOMAINS)
- unsigned long vectors = CONFIG_VECTORS_BASE;
-#else
- unsigned long vectors = (unsigned long)vectors_page;
-#endif
+ unsigned long vectors = (unsigned long)vectors_base;
extern char __stubs_start[], __stubs_end[];
extern char __vectors_start[], __vectors_end[];
extern char __kuser_helper_start[], __kuser_helper_end[];
int kuser_sz = __kuser_helper_end - __kuser_helper_start;
+ vectors_page = vectors_base;
+
/*
* Copy the vectors, stubs and kuser helpers (in entry-armv.S)
* into the vector page, mapped at 0xffff0000, and ensure these