From: Catalin Marinas <catalin.marinas@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-mm@kvack.org, linux-arch@vger.kernel.org,
Will Deacon <will@kernel.org>,
Dave P Martin <Dave.Martin@arm.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Szabolcs Nagy <szabolcs.nagy@arm.com>,
Kevin Brodsky <kevin.brodsky@arm.com>,
Andrey Konovalov <andreyknvl@google.com>,
Peter Collingbourne <pcc@google.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH v5 24/25] arm64: mte: Kconfig entry
Date: Wed, 24 Jun 2020 18:52:43 +0100 [thread overview]
Message-ID: <20200624175244.25837-25-catalin.marinas@arm.com> (raw)
In-Reply-To: <20200624175244.25837-1-catalin.marinas@arm.com>
From: Vincenzo Frascino <vincenzo.frascino@arm.com>
Add Memory Tagging Extension support to the arm64 kbuild.
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Co-developed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
---
Notes:
v5:
- Remove duplicate ARMv8.5 menu entry.
v4:
- select ARCH_USES_PG_ARCH_2.
- remove ARCH_NO_SWAP.
- default y.
arch/arm64/Kconfig | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index a4a094bedcb2..66f9b0805403 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1664,6 +1664,35 @@ config ARCH_RANDOM
provides a high bandwidth, cryptographically secure
hardware random number generator.
+config ARM64_AS_HAS_MTE
+ def_bool $(as-instr,.arch armv8.5-a+memtag)
+
+config ARM64_MTE
+ bool "Memory Tagging Extension support"
+ default y
+ depends on ARM64_AS_HAS_MTE && ARM64_TAGGED_ADDR_ABI
+ select ARCH_USES_HIGH_VMA_FLAGS
+ select ARCH_USES_PG_ARCH_2
+ help
+ Memory Tagging (part of the ARMv8.5 Extensions) provides
+ architectural support for run-time, always-on detection of
+ various classes of memory error to aid with software debugging
+ to eliminate vulnerabilities arising from memory-unsafe
+ languages.
+
+ This option enables the support for the Memory Tagging
+ Extension at EL0 (i.e. for userspace).
+
+ Selecting this option allows the feature to be detected at
+ runtime. Any secondary CPU not implementing this feature will
+ not be allowed a late bring-up.
+
+ Userspace binaries that want to use this feature must
+ explicitly opt in. The mechanism for the userspace is
+ described in:
+
+ Documentation/arm64/memory-tagging-extension.rst.
+
endmenu
config ARM64_SVE
next prev parent reply other threads:[~2020-06-24 17:53 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-24 17:52 [PATCH v5 00/25] arm64: Memory Tagging Extension user-space support Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 01/25] arm64: mte: system register definitions Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 02/25] arm64: mte: CPU feature detection and initial sysreg configuration Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 03/25] arm64: mte: Use Normal Tagged attributes for the linear map Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 04/25] arm64: mte: Add specific SIGSEGV codes Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 05/25] arm64: mte: Handle synchronous and asynchronous tag check faults Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 06/25] mm: Add PG_ARCH_2 page flag Catalin Marinas
2020-06-24 18:33 ` Andrew Morton
2020-06-24 18:36 ` Matthew Wilcox
2020-06-24 18:36 ` Matthew Wilcox
2020-06-25 17:10 ` Catalin Marinas
2020-07-01 17:30 ` Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 07/25] arm64: mte: Clear the tags when a page is mapped in user-space with PROT_MTE Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 08/25] arm64: mte: Tags-aware copy_{user_,}highpage() implementations Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 09/25] arm64: Avoid unnecessary clear_user_page() indirection Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 10/25] arm64: mte: Tags-aware aware memcmp_pages() implementation Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 11/25] mm: Introduce arch_calc_vm_flag_bits() Catalin Marinas
2020-06-24 18:36 ` Andrew Morton
2020-06-24 18:36 ` Andrew Morton
2020-06-25 17:34 ` Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 12/25] arm64: mte: Add PROT_MTE support to mmap() and mprotect() Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 13/25] mm: Introduce arch_validate_flags() Catalin Marinas
2020-06-24 18:37 ` Andrew Morton
2020-06-24 17:52 ` [PATCH v5 14/25] arm64: mte: Validate the PROT_MTE request via arch_validate_flags() Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 15/25] mm: Allow arm64 mmap(PROT_MTE) on RAM-based files Catalin Marinas
2020-06-24 18:42 ` Andrew Morton
2020-06-24 17:52 ` [PATCH v5 16/25] arm64: mte: Allow user control of the tag check mode via prctl() Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 17/25] arm64: mte: Allow user control of the generated random tags " Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 18/25] arm64: mte: Restore the GCR_EL1 register after a suspend Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 19/25] arm64: mte: Add PTRACE_{PEEK,POKE}MTETAGS support Catalin Marinas
2020-06-25 17:10 ` Luis Machado
2020-07-01 17:16 ` Catalin Marinas
2020-07-01 17:32 ` Luis Machado
2020-07-03 13:18 ` Catalin Marinas
2020-07-03 10:50 ` Catalin Marinas
2020-07-03 10:50 ` Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 20/25] fs: Handle intra-page faults in copy_mount_options() Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 21/25] mm: Add arch hooks for saving/restoring tags Catalin Marinas
2020-06-24 18:45 ` Andrew Morton
2020-06-25 9:04 ` Steven Price
2020-06-25 12:09 ` Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 22/25] arm64: mte: Enable swap of tagged pages Catalin Marinas
2020-06-25 11:37 ` Steven Price
2020-06-25 11:59 ` Catalin Marinas
2020-06-24 17:52 ` [PATCH v5 23/25] arm64: mte: Save tags when hibernating Catalin Marinas
2020-06-24 17:52 ` Catalin Marinas [this message]
2020-06-24 17:52 ` [PATCH v5 25/25] arm64: mte: Add Memory Tagging Extension documentation Catalin Marinas
2020-06-25 12:22 ` Szabolcs Nagy
2020-06-25 12:22 ` Szabolcs Nagy
2020-06-26 14:54 ` Catalin Marinas
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