From: Vladimir Murzin <vladimir.murzin@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: catalin.marinas@arm.com, keescook@chromium.org
Subject: [PATCH 0/2] arm64: Support Enhanced PAN
Date: Thu, 19 Nov 2020 13:39:51 +0000 [thread overview]
Message-ID: <20201119133953.15585-1-vladimir.murzin@arm.com> (raw)
Hi
ARM architecture gains support of Enhanced Privileged Access Never
(EPAN) which allows Privileged Access Never to be used with
Execute-only mappings.
As a consequence 24cecc377463 ("arm64: Revert support for execute-only
user mappings") can be revisited and re-enabled.
Changelog:
RFC -> v1
- removed cap check in pte_valid_not_user (per Catalin)
- local_flush_tlb_all() in cpu_enable_epan() (per Catalin)
- reordered with CnP (per Catalin)
- s/HWCAP2_EPAN/HWCAP2_EXECONLY/ (per Catalin)
Thanks!
Vladimir Murzin (2):
arm64: Support execute-only permissions with Enhanced PAN
arm64: Introduce HWCAPS2_EXECONLY
arch/arm64/Kconfig | 17 +++++++++++++++++
arch/arm64/include/asm/cpucaps.h | 5 +++--
arch/arm64/include/asm/hwcap.h | 1 +
arch/arm64/include/asm/pgtable-prot.h | 5 +++--
arch/arm64/include/asm/pgtable.h | 14 +++++++++++++-
arch/arm64/include/asm/sysreg.h | 2 ++
arch/arm64/include/uapi/asm/hwcap.h | 1 +
arch/arm64/kernel/cpufeature.c | 24 ++++++++++++++++++++++++
arch/arm64/kernel/cpuinfo.c | 1 +
arch/arm64/mm/fault.c | 3 +++
10 files changed, 68 insertions(+), 5 deletions(-)
--
2.7.4
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next reply other threads:[~2020-11-19 13:40 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-19 13:39 Vladimir Murzin [this message]
2020-11-19 13:39 ` [PATCH 1/2] arm64: Support execute-only permissions with Enhanced PAN Vladimir Murzin
2020-11-19 18:22 ` Catalin Marinas
2020-11-19 18:52 ` Dave Martin
2020-11-27 18:31 ` Catalin Marinas
2020-12-02 18:23 ` Catalin Marinas
2020-12-08 11:41 ` Vladimir Murzin
2020-11-19 13:39 ` [PATCH 2/2] arm64: Introduce HWCAPS2_EXECONLY Vladimir Murzin
2020-12-08 16:36 ` Dave Martin
2020-12-08 17:34 ` Catalin Marinas
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