[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <20231002151031.110551-1-alexghiti@rivosinc.com>
Date: Mon, 2 Oct 2023 17:10:26 +0200
From: Alexandre Ghiti <alexghiti@...osinc.com>
To: Ryan Roberts <ryan.roberts@....com>,
Alexander Potapenko <glider@...gle.com>,
Marco Elver <elver@...gle.com>,
Dmitry Vyukov <dvyukov@...gle.com>,
Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>,
Anup Patel <anup@...infault.org>,
Atish Patra <atishp@...shpatra.org>,
Ard Biesheuvel <ardb@...nel.org>,
Andrey Ryabinin <ryabinin.a.a@...il.com>,
Andrey Konovalov <andreyknvl@...il.com>,
Vincenzo Frascino <vincenzo.frascino@....com>,
kasan-dev@...glegroups.com, linux-riscv@...ts.infradead.org,
linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
kvm-riscv@...ts.infradead.org, linux-efi@...r.kernel.org,
linux-mm@...ck.org
Cc: Alexandre Ghiti <alexghiti@...osinc.com>
Subject: [PATCH 0/5] riscv: Use READ_ONCE()/WRITE_ONCE() for pte accesses
This series is a follow-up for riscv of a recent series from Ryan [1] which
converts all direct dereferences of pte_t into a ptet_get() access.
The goal here for riscv is to use READ_ONCE()/WRITE_ONCE() for all page
table entries accesses to avoid any compiler transformation when the
hardware can concurrently modify the page tables entries (A/D bits for
example).
I went a bit further and added pud/p4d/pgd_get() helpers as such concurrent
modifications can happen too at those levels.
[1] https://lore.kernel.org/all/20230612151545.3317766-1-ryan.roberts@arm.com/
Alexandre Ghiti (5):
riscv: Use WRITE_ONCE() when setting page table entries
mm: Introduce pudp/p4dp/pgdp_get() functions
riscv: mm: Only compile pgtable.c if MMU
riscv: Suffix all page table entry pointers with 'p'
riscv: Use accessors to page table entries instead of direct
dereference
arch/riscv/include/asm/kfence.h | 6 +-
arch/riscv/include/asm/kvm_host.h | 2 +-
arch/riscv/include/asm/pgalloc.h | 86 ++++++++++----------
arch/riscv/include/asm/pgtable-64.h | 26 +++---
arch/riscv/include/asm/pgtable.h | 33 ++------
arch/riscv/kernel/efi.c | 2 +-
arch/riscv/kvm/mmu.c | 44 +++++-----
arch/riscv/mm/Makefile | 3 +-
arch/riscv/mm/fault.c | 38 ++++-----
arch/riscv/mm/hugetlbpage.c | 80 +++++++++----------
arch/riscv/mm/init.c | 30 +++----
arch/riscv/mm/kasan_init.c | 119 ++++++++++++++--------------
arch/riscv/mm/pageattr.c | 74 +++++++++--------
arch/riscv/mm/pgtable.c | 71 +++++++++++------
include/linux/pgtable.h | 21 +++++
15 files changed, 334 insertions(+), 301 deletions(-)
--
2.39.2
Powered by blists - more mailing lists