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Subject[PATCH v2 30/37] kasan: define KASAN_GRANULE_SIZE for HW_TAGS
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Hardware tag-based KASAN has granules of MTE_GRANULE_SIZE. Define
KASAN_GRANULE_SIZE to MTE_GRANULE_SIZE for CONFIG_KASAN_HW_TAGS.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
---
Change-Id: I5d1117e6a991cbca00d2cfb4ba66e8ae2d8f513a
---
mm/kasan/kasan.h | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index 8b43fc163ed1..ba63d8a62968 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h
@@ -5,7 +5,13 @@
#include <linux/kasan.h>
#include <linux/stackdepot.h>

+#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
#define KASAN_GRANULE_SIZE (1UL << KASAN_SHADOW_SCALE_SHIFT)
+#else
+#include <asm/mte-helpers.h>
+#define KASAN_GRANULE_SIZE (MTE_GRANULE_SIZE)
+#endif
+
#define KASAN_GRANULE_MASK (KASAN_GRANULE_SIZE - 1)

#define KASAN_TAG_KERNEL 0xFF /* native kernel pointers tag */
--
2.28.0.618.gf4bc123cb7-goog
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