From: Reiji Watanabe <reijiw@google.com>
To: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Peter Collingbourne <pcc@google.com>,
Evgenii Stepanov <eugenis@google.com>,
guanghuifeng@linux.alibaba.com,
linux-arm-kernel@lists.infradead.org,
Peter Shier <pshier@google.com>,
Ricardo Koller <ricarkol@google.com>,
Oliver Upton <oupton@google.com>,
Jing Zhang <jingzhangos@google.com>,
Raghavendra Rao Anata <rananta@google.com>,
Reiji Watanabe <reijiw@google.com>
Subject: [PATCH v4 0/2] arm64: DC {ZVA,GVA,GZVA} shouldn't be used when DCZID_EL0.DZP == 1
Date: Sun, 5 Dec 2021 16:47:34 -0800 [thread overview]
Message-ID: <20211206004736.1520989-1-reijiw@google.com> (raw)
DCZID_EL0.DZP indicates whether or not use of DC {ZVA,GVA,GZVA} is
prohibited. However, clear_page(), mte_set_mem_tag_range(), and
mte_zero_clear_page_tags() use those instructions without checking it.
Fix those functions not to use DC {ZVA,GVA,GZVA} when DCZID_EL0.DZP == 1.
v4:
- Fix mte_zero_clear_page_tags to use stz2g instead of stzg. [Catalin]
- Fix mte_zero_clear_page_tags to use MTE_GRANULE_SIZE instead
of 16. [Catalin]
v3: https://lore.kernel.org/all/20211119060927.3185381-1-reijiw@google.com/
- Use stnp instead of stp in clear_page().
v2: https://lore.kernel.org/all/20211108071149.823570-1-reijiw@google.com/
- Fix mte_set_mem_tag_range() and mte_zero_clear_page_tags() not to use
DC {GVA,GZVA} when DCZID_EL0.DZP == 1. [Mark]
- Fix a typo of the comment in clear_page(). [Mark]
- Fix a loop of for stp in clear_page() for more consistency with
the existing loop. [Mark]
v1: https://lore.kernel.org/all/20211026034844.1393437-1-reijiw@google.com/
Reiji Watanabe (2):
arm64: clear_page() shouldn't use DC ZVA when DCZID_EL0.DZP == 1
arm64: mte: DC {GVA,GZVA} shouldn't be used when DCZID_EL0.DZP == 1
arch/arm64/include/asm/mte-kasan.h | 8 +++++---
arch/arm64/lib/clear_page.S | 10 ++++++++++
arch/arm64/lib/mte.S | 8 +++++++-
3 files changed, 22 insertions(+), 4 deletions(-)
base-commit: 0fcfb00b28c0b7884635dacf38e46d60bf3d4eb1
--
2.34.1.400.ga245620fadb-goog
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next reply other threads:[~2021-12-06 0:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-06 0:47 Reiji Watanabe [this message]
2021-12-06 0:47 ` [PATCH v4 1/2] arm64: clear_page() shouldn't use DC ZVA when DCZID_EL0.DZP == 1 Reiji Watanabe
2021-12-06 0:47 ` [PATCH v4 2/2] arm64: mte: DC {GVA,GZVA} shouldn't be used " Reiji Watanabe
2021-12-06 17:27 ` [PATCH v4 0/2] arm64: DC {ZVA, GVA, GZVA} " Catalin Marinas
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