[v2,30/37] kasan: define KASAN_GRANULE_SIZE for HW_TAGS

Message ID	3a3002e1d70f8faf2dfc07176c3ece22450b68a3.1600204505.git.andreyknvl@google.com (mailing list archive)
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Headers	show Return-Path: <SRS0=2pn3=CY=kvack.org=owner-linux-mm@kernel.org> DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B733D20795 Date: Tue, 15 Sep 2020 23:16:12 +0200 In-Reply-To: <cover.1600204505.git.andreyknvl@google.com> Message-Id: <3a3002e1d70f8faf2dfc07176c3ece22450b68a3.1600204505.git.andreyknvl@google.com> Mime-Version: 1.0 References: <cover.1600204505.git.andreyknvl@google.com> Subject: [PATCH v2 30/37] kasan: define KASAN_GRANULE_SIZE for HW_TAGS From: Andrey Konovalov <andreyknvl@google.com> To: Dmitry Vyukov <dvyukov@google.com>, Vincenzo Frascino <vincenzo.frascino@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, kasan-dev@googlegroups.com Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>, Alexander Potapenko <glider@google.com>, Marco Elver <elver@google.com>, Evgenii Stepanov <eugenis@google.com>, Elena Petrova <lenaptr@google.com>, Branislav Rankov <Branislav.Rankov@arm.com>, Kevin Brodsky <kevin.brodsky@arm.com>, Will Deacon <will.deacon@arm.com>, Andrew Morton <akpm@linux-foundation.org>, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Konovalov <andreyknvl@google.com> Content-Type: text/plain; charset="UTF-8" Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	kasan: add hardware tag-based mode for arm64 \| expand [v2,00/37] kasan: add hardware tag-based mode for arm64 [v2,01/37] kasan: KASAN_VMALLOC depends on KASAN_GENERIC [v2,02/37] kasan: group vmalloc code [v2,03/37] kasan: shadow declarations only for software modes [v2,04/37] kasan: rename (un)poison_shadow to (un)poison_memory [v2,05/37] kasan: rename KASAN_SHADOW_* to KASAN_GRANULE_* [v2,06/37] kasan: only build init.c for software modes [v2,07/37] kasan: split out shadow.c from common.c [v2,08/37] kasan: rename generic/tags_report.c files [v2,09/37] kasan: don't duplicate config dependencies [v2,10/37] kasan: hide invalid free check implementation [v2,11/37] kasan: decode stack frame only with KASAN_STACK_ENABLE [v2,12/37] kasan, arm64: only init shadow for software modes [v2,13/37] kasan, arm64: only use kasan_depth for software modes [v2,14/37] kasan: rename addr_has_shadow to addr_has_metadata [v2,15/37] kasan: rename print_shadow_for_address to print_memory_metadata [v2,16/37] kasan: kasan_non_canonical_hook only for software modes [v2,17/37] kasan: rename SHADOW layout macros to META [v2,18/37] kasan: separate metadata_fetch_row for each mode [v2,19/37] kasan: don't allow SW_TAGS with ARM64_MTE [v2,20/37] kasan: rename tags.c to tags_sw.c [v2,21/37] kasan: introduce CONFIG_KASAN_HW_TAGS [v2,22/37] arm64: mte: Add in-kernel MTE helpers [v2,23/37] arm64: kasan: Add arch layer for memory tagging helpers [v2,24/37] arm64: mte: Add in-kernel tag fault handler [v2,25/37] arm64: kasan: Enable in-kernel MTE [v2,26/37] arm64: mte: Convert gcr_user into an exclude mask [v2,27/37] arm64: mte: Switch GCR_EL1 in kernel entry and exit [v2,28/37] arm64: kasan: Enable TBI EL1 [v2,29/37] arm64: kasan: Align allocations for HW_TAGS [v2,30/37] kasan: define KASAN_GRANULE_SIZE for HW_TAGS [v2,31/37] kasan, x86, s390: update undef CONFIG_KASAN [v2,32/37] kasan, arm64: expand CONFIG_KASAN checks [v2,33/37] kasan, arm64: implement HW_TAGS runtime [v2,34/37] kasan, arm64: print report from tag fault handler [v2,35/37] kasan, slub: reset tags when accessing metadata [v2,36/37] kasan, arm64: enable CONFIG_KASAN_HW_TAGS [v2,37/37] kasan: add documentation for hardware tag-based mode

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3a3002e1d70f8faf2dfc07176c3ece22450b68a3.1600204505.git.andreyknvl@google.com (mailing list archive)

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DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B733D20795
Date: Tue, 15 Sep 2020 23:16:12 +0200
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Subject: [PATCH v2 30/37] kasan: define KASAN_GRANULE_SIZE for HW_TAGS
From: Andrey Konovalov <andreyknvl@google.com>
To: Dmitry Vyukov <dvyukov@google.com>,
 Vincenzo Frascino <vincenzo.frascino@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>, kasan-dev@googlegroups.com
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>,
 Alexander Potapenko <glider@google.com>,
	Marco Elver <elver@google.com>, Evgenii Stepanov <eugenis@google.com>,
	Elena Petrova <lenaptr@google.com>,
 Branislav Rankov <Branislav.Rankov@arm.com>,
	Kevin Brodsky <kevin.brodsky@arm.com>, Will Deacon <will.deacon@arm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
 linux-arm-kernel@lists.infradead.org,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Andrey Konovalov <andreyknvl@google.com>
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Series

kasan: add hardware tag-based mode for arm64 | expand

Commit Message

Andrey Konovalov Sept. 15, 2020, 9:16 p.m. UTC

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 */

[v2,30/37] kasan: define KASAN_GRANULE_SIZE for HW_TAGS

Commit Message

Patch