[mm,v11,07/42] kasan: only build init.c for software modes

Message ID	bae0a6a35b7a9b1a443803c1a55e6e3fecc311c9.1606161801.git.andreyknvl@google.com (mailing list archive)
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Headers	show Return-Path: <SRS0=45Hb=E5=lists.infradead.org=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@kernel.org> DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3A39120715 Date: Mon, 23 Nov 2020 21:07:31 +0100 In-Reply-To: <cover.1606161801.git.andreyknvl@google.com> Message-Id: <bae0a6a35b7a9b1a443803c1a55e6e3fecc311c9.1606161801.git.andreyknvl@google.com> Mime-Version: 1.0 References: <cover.1606161801.git.andreyknvl@google.com> Subject: [PATCH mm v11 07/42] kasan: only build init.c for software modes From: Andrey Konovalov <andreyknvl@google.com> To: Andrew Morton <akpm@linux-foundation.org> Precedence: list Cc: linux-arm-kernel@lists.infradead.org, Marco Elver <elver@google.com>, Catalin Marinas <catalin.marinas@arm.com>, Kevin Brodsky <kevin.brodsky@arm.com>, Will Deacon <will.deacon@arm.com>, Branislav Rankov <Branislav.Rankov@arm.com>, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Alexander Potapenko <glider@google.com>, Evgenii Stepanov <eugenis@google.com>, Andrey Konovalov <andreyknvl@google.com>, Andrey Ryabinin <aryabinin@virtuozzo.com>, Vincenzo Frascino <vincenzo.frascino@arm.com>, Dmitry Vyukov <dvyukov@google.com> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org
Series	kasan: add hardware tag-based mode for arm64 \| expand [mm,v11,00/42] kasan: add hardware tag-based mode for arm64 [mm,v11,01/42] kasan: drop unnecessary GPL text from comment headers [mm,v11,02/42] kasan: KASAN_VMALLOC depends on KASAN_GENERIC [mm,v11,03/42] kasan: group vmalloc code [mm,v11,04/42] kasan: shadow declarations only for software modes [mm,v11,05/42] kasan: rename (un)poison_shadow to (un)poison_range [mm,v11,06/42] kasan: rename KASAN_SHADOW_* to KASAN_GRANULE_* [mm,v11,07/42] kasan: only build init.c for software modes [mm,v11,08/42] kasan: split out shadow.c from common.c [mm,v11,09/42] kasan: define KASAN_MEMORY_PER_SHADOW_PAGE [mm,v11,10/42] kasan: rename report and tags files [mm,v11,11/42] kasan: don't duplicate config dependencies [mm,v11,12/42] kasan: hide invalid free check implementation [mm,v11,13/42] kasan: decode stack frame only with KASAN_STACK_ENABLE [mm,v11,14/42] kasan, arm64: only init shadow for software modes [mm,v11,15/42] kasan, arm64: only use kasan_depth for software modes [mm,v11,16/42] kasan, arm64: move initialization message [mm,v11,17/42] kasan, arm64: rename kasan_init_tags and mark as __init [mm,v11,18/42] kasan: rename addr_has_shadow to addr_has_metadata [mm,v11,19/42] kasan: rename print_shadow_for_address to print_memory_metadata [mm,v11,20/42] kasan: rename SHADOW layout macros to META [mm,v11,21/42] kasan: separate metadata_fetch_row for each mode [mm,v11,22/42] kasan, arm64: don't allow SW_TAGS with ARM64_MTE [mm,v11,23/42] kasan: introduce CONFIG_KASAN_HW_TAGS [mm,v11,24/42] arm64: Enable armv8.5-a asm-arch option [mm,v11,25/42] arm64: mte: Add in-kernel MTE helpers [mm,v11,26/42] arm64: mte: Reset the page tag in page->flags [mm,v11,27/42] arm64: mte: Add in-kernel tag fault handler [mm,v11,28/42] arm64: kasan: Allow enabling in-kernel MTE [mm,v11,29/42] arm64: mte: Convert gcr_user into an exclude mask [mm,v11,30/42] arm64: mte: Switch GCR_EL1 in kernel entry and exit [mm,v11,31/42] kasan, mm: untag page address in free_reserved_area [mm,v11,32/42] arm64: kasan: Align allocations for HW_TAGS [mm,v11,33/42] arm64: kasan: Add arch layer for memory tagging helpers [mm,v11,34/42] kasan: define KASAN_GRANULE_SIZE for HW_TAGS [mm,v11,35/42] kasan, x86, s390: update undef CONFIG_KASAN [mm,v11,36/42] kasan, arm64: expand CONFIG_KASAN checks [mm,v11,37/42] kasan, arm64: implement HW_TAGS runtime [mm,v11,38/42] kasan, arm64: print report from tag fault handler [mm,v11,39/42] kasan, mm: reset tags when accessing metadata [mm,v11,40/42] kasan, arm64: enable CONFIG_KASAN_HW_TAGS [mm,v11,41/42] kasan: add documentation for hardware tag-based mode [mm,v11,42/42] kselftest/arm64: Check GCR_EL1 after context switch

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Date: Mon, 23 Nov 2020 21:07:31 +0100
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Subject: [PATCH mm v11 07/42] kasan: only build init.c for software modes
From: Andrey Konovalov <andreyknvl@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Precedence: list
Cc: linux-arm-kernel@lists.infradead.org, Marco Elver <elver@google.com>,
 Catalin Marinas <catalin.marinas@arm.com>,
 Kevin Brodsky <kevin.brodsky@arm.com>, Will Deacon <will.deacon@arm.com>,
 Branislav Rankov <Branislav.Rankov@arm.com>, kasan-dev@googlegroups.com,
 linux-kernel@vger.kernel.org, linux-mm@kvack.org,
 Alexander Potapenko <glider@google.com>,
 Evgenii Stepanov <eugenis@google.com>,
 Andrey Konovalov <andreyknvl@google.com>,
 Andrey Ryabinin <aryabinin@virtuozzo.com>,
 Vincenzo Frascino <vincenzo.frascino@arm.com>,
 Dmitry Vyukov <dvyukov@google.com>
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Series

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

Commit Message

Andrey Konovalov Nov. 23, 2020, 8:07 p.m. UTC

This is a preparatory commit for the upcoming addition of a new hardware
tag-based (MTE-based) KASAN mode.

The new mode won't be using shadow memory, so only build init.c that
contains shadow initialization code for software modes.

No functional changes for software modes.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Marco Elver <elver@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
---
Change-Id: I8d68c47345afc1dbedadde738f34a874dcae5080
---
 mm/kasan/Makefile | 6 +++---
 mm/kasan/init.c   | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/kasan/Makefile b/mm/kasan/Makefile
index 370d970e5ab5..7cf685bb51bd 100644
--- a/mm/kasan/Makefile
+++ b/mm/kasan/Makefile
@@ -29,6 +29,6 @@  CFLAGS_report.o := $(CC_FLAGS_KASAN_RUNTIME)
 CFLAGS_tags.o := $(CC_FLAGS_KASAN_RUNTIME)
 CFLAGS_tags_report.o := $(CC_FLAGS_KASAN_RUNTIME)
 
-obj-$(CONFIG_KASAN) := common.o init.o report.o
-obj-$(CONFIG_KASAN_GENERIC) += generic.o generic_report.o quarantine.o
-obj-$(CONFIG_KASAN_SW_TAGS) += tags.o tags_report.o
+obj-$(CONFIG_KASAN) := common.o report.o
+obj-$(CONFIG_KASAN_GENERIC) += init.o generic.o generic_report.o quarantine.o
+obj-$(CONFIG_KASAN_SW_TAGS) += init.o tags.o tags_report.o
diff --git a/mm/kasan/init.c b/mm/kasan/init.c
index dfddd6c39fe6..1a71eaa8c5f9 100644
--- a/mm/kasan/init.c
+++ b/mm/kasan/init.c
@@ -1,6 +1,6 @@ 
 // SPDX-License-Identifier: GPL-2.0
 /*
- * This file contains some kasan initialization code.
+ * This file contains KASAN shadow initialization code.
  *
  * Copyright (c) 2015 Samsung Electronics Co., Ltd.
  * Author: Andrey Ryabinin <ryabinin.a.a@gmail.com>

[mm,v11,07/42] kasan: only build init.c for software modes

Commit Message

Patch