From: Amit Daniel Kachhap <amit.kachhap@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: Mark Rutland <mark.rutland@arm.com>,
Kees Cook <keescook@chromium.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Kristina Martsenko <kristina.martsenko@arm.com>,
Mark Brown <broonie@kernel.org>,
James Morse <james.morse@arm.com>,
Amit Daniel Kachhap <amit.kachhap@arm.com>,
Vincenzo Frascino <Vincenzo.Frascino@arm.com>,
Will Deacon <will@kernel.org>, Dave Martin <Dave.Martin@arm.com>
Subject: [PATCH v3 0/3] arm64: add Armv8.6 pointer authentication
Date: Thu, 18 Jun 2020 10:40:26 +0530 [thread overview]
Message-ID: <1592457029-18547-1-git-send-email-amit.kachhap@arm.com> (raw)
These patch series adds support for Armv8.6 pointer authentication
enhanced mandatory features. These features are,
* Enhanced PAC generation algorithm.
* Generate fault when authenticate instruction fails.
For the first feature no code change is done and for the second feature
a ptrauth fault handler is added.
More details can be found here [1].
Changes since v2 [2]:
* Dropped the patch "arm64: cpufeature: Fix the handler for address authentication"
* Added new matching function for address authentication as generic
matching function has_cpuid_feature is specific for LOWER_SAFE
features. This was suggested by Suzuki [3].
* Disabled probe of Authenticate ptrauth instructions as per Mark
Brown's merged changes of whitelisting of hint instructions.
This series is based on kernel version v5.8-rc1.
Regards,
Amit
[1]: https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/arm-architecture-developments-armv8-6-a
[2]: http://lists.infradead.org/pipermail/linux-arm-kernel/2020-April/723751.html
[3]: http://lists.infradead.org/pipermail/linux-arm-kernel/2020-May/733839.html
Amit Daniel Kachhap (3):arm64: ptrauth: add pointer authentication Armv8.6 enhanced feature
arm64: cpufeature: Modify address authentication cpufeature to exact
arm64: kprobe: disable probe of fault prone ptrauth instruction
arch/arm64/include/asm/esr.h | 4 +-
arch/arm64/include/asm/exception.h | 1 +
arch/arm64/include/asm/sysreg.h | 24 +++++++----
arch/arm64/kernel/cpufeature.c | 56 +++++++++++++++++++++-----
arch/arm64/kernel/entry-common.c | 24 +++++++++++
arch/arm64/kernel/insn.c | 6 ---
arch/arm64/kernel/probes/decode-insn.c | 2 +-
arch/arm64/kernel/traps.c | 9 +++++
8 files changed, 101 insertions(+), 25 deletions(-)
--
2.17.1
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next reply other threads:[~2020-06-18 5:11 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-18 5:10 Amit Daniel Kachhap [this message]
2020-06-18 5:10 ` [PATCH v3 1/3] arm64: ptrauth: add pointer authentication Armv8.6 enhanced feature Amit Daniel Kachhap
[not found] ` <20200622142255.GS25945@arm.com>
[not found] ` <d1d3b25d-12d8-15d6-086a-d23b36440dd5@arm.com>
2020-06-23 14:45 ` Dave Martin
2020-06-24 7:07 ` Amit Daniel Kachhap
2020-06-18 5:10 ` [PATCH v3 2/3] arm64: cpufeature: Modify address authentication cpufeature to exact Amit Daniel Kachhap
[not found] ` <20200622143503.GT25945@arm.com>
[not found] ` <d4e29203-7a6b-c6e5-643c-6b0abc670feb@arm.com>
2020-06-23 14:47 ` Dave Martin
2020-06-24 7:13 ` Amit Daniel Kachhap
2020-06-24 7:49 ` Will Deacon
2020-06-24 11:55 ` Amit Daniel Kachhap
2020-06-18 5:10 ` [PATCH v3 3/3] arm64: kprobe: disable probe of fault prone ptrauth instruction Amit Daniel Kachhap
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