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Diffstat (limited to 'mm/kasan/kasan.h')
-rw-r--r--mm/kasan/kasan.h32
1 files changed, 26 insertions, 6 deletions
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index 8bf568a80eb8..b495e17445ad 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h
@@ -13,16 +13,28 @@
#include "../slab.h"
DECLARE_STATIC_KEY_FALSE(kasan_flag_stacktrace);
-extern bool kasan_flag_async __ro_after_init;
+
+enum kasan_mode {
+ KASAN_MODE_SYNC,
+ KASAN_MODE_ASYNC,
+ KASAN_MODE_ASYMM,
+};
+
+extern enum kasan_mode kasan_mode __ro_after_init;
static inline bool kasan_stack_collection_enabled(void)
{
return static_branch_unlikely(&kasan_flag_stacktrace);
}
-static inline bool kasan_async_mode_enabled(void)
+static inline bool kasan_async_fault_possible(void)
+{
+ return kasan_mode == KASAN_MODE_ASYNC || kasan_mode == KASAN_MODE_ASYMM;
+}
+
+static inline bool kasan_sync_fault_possible(void)
{
- return kasan_flag_async;
+ return kasan_mode == KASAN_MODE_SYNC || kasan_mode == KASAN_MODE_ASYMM;
}
#else
@@ -31,14 +43,17 @@ static inline bool kasan_stack_collection_enabled(void)
return true;
}
-static inline bool kasan_async_mode_enabled(void)
+static inline bool kasan_async_fault_possible(void)
{
return false;
}
-#endif
+static inline bool kasan_sync_fault_possible(void)
+{
+ return true;
+}
-extern bool kasan_flag_async __ro_after_init;
+#endif
#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
#define KASAN_GRANULE_SIZE (1UL << KASAN_SHADOW_SCALE_SHIFT)
@@ -289,6 +304,9 @@ static inline const void *arch_kasan_set_tag(const void *addr, u8 tag)
#ifndef arch_enable_tagging_async
#define arch_enable_tagging_async()
#endif
+#ifndef arch_enable_tagging_asymm
+#define arch_enable_tagging_asymm()
+#endif
#ifndef arch_force_async_tag_fault
#define arch_force_async_tag_fault()
#endif
@@ -304,6 +322,7 @@ static inline const void *arch_kasan_set_tag(const void *addr, u8 tag)
#define hw_enable_tagging_sync() arch_enable_tagging_sync()
#define hw_enable_tagging_async() arch_enable_tagging_async()
+#define hw_enable_tagging_asymm() arch_enable_tagging_asymm()
#define hw_force_async_tag_fault() arch_force_async_tag_fault()
#define hw_get_random_tag() arch_get_random_tag()
#define hw_get_mem_tag(addr) arch_get_mem_tag(addr)
@@ -314,6 +333,7 @@ static inline const void *arch_kasan_set_tag(const void *addr, u8 tag)
#define hw_enable_tagging_sync()
#define hw_enable_tagging_async()
+#define hw_enable_tagging_asymm()
#endif /* CONFIG_KASAN_HW_TAGS */