On Wed, Nov 11, 2020 at 4:58 PM Alexander Potapenko [off-list ref] wrote:

On Tue, Nov 10, 2020 at 11:12 PM Andrey Konovalov [off-list ref] wrote:

quoted

This patch adds a configuration option for a new KASAN mode called
hardware tag-based KASAN. This mode uses the memory tagging approach
like the software tag-based mode, but relies on arm64 Memory Tagging
Extension feature for tag management and access checking.

Signed-off-by: Andrey Konovalov <redacted>
Co-developed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Marco Elver <elver@google.com>
---
Change-Id: I246c2def9fffa6563278db1bddfbe742ca7bdefe
---
 lib/Kconfig.kasan | 58 +++++++++++++++++++++++++++++++++--------------
 1 file changed, 41 insertions(+), 17 deletions(-)

diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan
index ec59a0e26d09..e5f27ec8b254 100644
--- a/lib/Kconfig.kasan
+++ b/lib/Kconfig.kasan

@@ -6,7 +6,10 @@ config HAVE_ARCH_KASAN
 config HAVE_ARCH_KASAN_SW_TAGS
        bool

-config HAVE_ARCH_KASAN_VMALLOC
+config HAVE_ARCH_KASAN_HW_TAGS
+       bool
+
+config HAVE_ARCH_KASAN_VMALLOC
        bool

 config CC_HAS_KASAN_GENERIC

@@ -20,11 +23,11 @@ config CC_HAS_WORKING_NOSANITIZE_ADDRESS

It might make sense to add a comment to
CC_HAS_WORKING_NOSANITIZE_ADDRESS describing which modes need it (and
why).

OK, will do in v10, thanks!

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