| Message ID | 20231213203001.179237-1-alexghiti@rivosinc.com |
|---|---|
| Headers | show |
| Series | riscv: Use READ_ONCE()/WRITE_ONCE() for pte accesses | expand |
Hello: This series was applied to riscv/linux.git (for-next) by Palmer Dabbelt <palmer@rivosinc.com>: On Wed, 13 Dec 2023 21:29:57 +0100 you wrote: > 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). > > [...] Here is the summary with links: - [v2,1/4] riscv: Use WRITE_ONCE() when setting page table entries https://git.kernel.org/riscv/c/c30fa83b4989 - [v2,2/4] mm: Introduce pudp/p4dp/pgdp_get() functions https://git.kernel.org/riscv/c/eba2591d99d1 - [v2,3/4] riscv: mm: Only compile pgtable.c if MMU https://git.kernel.org/riscv/c/d6508999d188 - [v2,4/4] riscv: Use accessors to page table entries instead of direct dereference https://git.kernel.org/riscv/c/edf955647269 You are awesome, thank you!
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/ Changes in v2: - Fix the kernel test report on arm32 - Remove the pte suffix patch - Fix pud_offset/p4d_offset which were missing the use of accessors - Rebase on top of 6.7-rc4 Alexandre Ghiti (4): 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: Use accessors to page table entries instead of direct dereference arch/arm/include/asm/pgtable.h | 2 ++ arch/riscv/include/asm/kfence.h | 4 +-- arch/riscv/include/asm/pgtable-64.h | 22 +++---------- arch/riscv/include/asm/pgtable.h | 33 +++++-------------- arch/riscv/kernel/efi.c | 2 +- arch/riscv/kvm/mmu.c | 22 ++++++------- arch/riscv/mm/Makefile | 3 +- arch/riscv/mm/fault.c | 16 ++++----- arch/riscv/mm/hugetlbpage.c | 12 +++---- arch/riscv/mm/kasan_init.c | 45 +++++++++++++------------ arch/riscv/mm/pageattr.c | 44 ++++++++++++------------- arch/riscv/mm/pgtable.c | 51 ++++++++++++++++++++++++++--- include/linux/pgtable.h | 21 ++++++++++++ 13 files changed, 157 insertions(+), 120 deletions(-)