From: akpm@linux-foundation.org
To: andreyknvl@google.com, aryabinin@virtuozzo.com,
Branislav.Rankov@arm.com, catalin.marinas@arm.com,
dvyukov@google.com, elver@google.com, eugenis@google.com,
glider@google.com, gor@linux.ibm.com, kevin.brodsky@arm.com,
mm-commits@vger.kernel.org, vincenzo.frascino@arm.com,
will.deacon@arm.com
Subject: [merged] arm64-enable-armv85-a-asm-arch-option.patch removed from -mm tree
Date: Wed, 23 Dec 2020 10:28:59 -0800 [thread overview]
Message-ID: <20201223182859.5uSR5GE8Y%akpm@linux-foundation.org> (raw)
The patch titled
Subject: arm64: enable armv8.5-a asm-arch option
has been removed from the -mm tree. Its filename was
arm64-enable-armv85-a-asm-arch-option.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Vincenzo Frascino <vincenzo.frascino@arm.com>
Subject: arm64: enable armv8.5-a asm-arch option
Hardware tag-based KASAN relies on Memory Tagging Extension (MTE) which is
an armv8.5-a architecture extension.
Enable the correct asm option when the compiler supports it in order to
allow the usage of ALTERNATIVE()s with MTE instructions.
Link: https://lkml.kernel.org/r/d03d1157124ea3532eaeb77507988733f5734986.1606161801.git.andreyknvl@google.com
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Branislav Rankov <Branislav.Rankov@arm.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Marco Elver <elver@google.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
arch/arm64/Kconfig | 4 ++++
arch/arm64/Makefile | 5 +++++
2 files changed, 9 insertions(+)
--- a/arch/arm64/Kconfig~arm64-enable-armv85-a-asm-arch-option
+++ a/arch/arm64/Kconfig
@@ -1571,6 +1571,9 @@ endmenu
menu "ARMv8.5 architectural features"
+config AS_HAS_ARMV8_5
+ def_bool $(cc-option,-Wa$(comma)-march=armv8.5-a)
+
config ARM64_BTI
bool "Branch Target Identification support"
default y
@@ -1645,6 +1648,7 @@ config ARM64_MTE
bool "Memory Tagging Extension support"
default y
depends on ARM64_AS_HAS_MTE && ARM64_TAGGED_ADDR_ABI
+ depends on AS_HAS_ARMV8_5
select ARCH_USES_HIGH_VMA_FLAGS
help
Memory Tagging (part of the ARMv8.5 Extensions) provides
--- a/arch/arm64/Makefile~arm64-enable-armv85-a-asm-arch-option
+++ a/arch/arm64/Makefile
@@ -96,6 +96,11 @@ ifeq ($(CONFIG_AS_HAS_ARMV8_4), y)
asm-arch := armv8.4-a
endif
+ifeq ($(CONFIG_AS_HAS_ARMV8_5), y)
+# make sure to pass the newest target architecture to -march.
+asm-arch := armv8.5-a
+endif
+
ifdef asm-arch
KBUILD_CFLAGS += -Wa,-march=$(asm-arch) \
-DARM64_ASM_ARCH='"$(asm-arch)"'
_
Patches currently in -mm which might be from vincenzo.frascino@arm.com are
reply other threads:[~2020-12-23 18:29 UTC|newest]
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