On Fri, Jul 14, 2023 at 6:56 PM Charlie Jenkins <charlie@xxxxxxxxxxxx> wrote: > > sv57 is supported in the kernel so pgtable.h should reflect that. > > Signed-off-by: Charlie Jenkins <charlie@xxxxxxxxxxxx> > --- > arch/riscv/include/asm/pgtable.h | 8 +++++--- > 1 file changed, 5 insertions(+), 3 deletions(-) > > diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h > index e13f5872bfe9..28660bab754c 100644 > --- a/arch/riscv/include/asm/pgtable.h > +++ b/arch/riscv/include/asm/pgtable.h > @@ -840,14 +840,16 @@ static inline pte_t pte_swp_clear_exclusive(pte_t pte) > * Task size is 0x4000000000 for RV64 or 0x9fc00000 for RV32. > * Note that PGDIR_SIZE must evenly divide TASK_SIZE. > * Task size is: > - * - 0x9fc00000 (~2.5GB) for RV32. > - * - 0x4000000000 ( 256GB) for RV64 using SV39 mmu > - * - 0x800000000000 ( 128TB) for RV64 using SV48 mmu > + * - 0x9fc00000 (~2.5GB) for RV32. > + * - 0x4000000000 ( 256GB) for RV64 using SV39 mmu > + * - 0x800000000000 ( 128TB) for RV64 using SV48 mmu > + * - 0x100000000000000 ( 64PB) for RV64 using SV57 mmu > * > * Note that PGDIR_SIZE must evenly divide TASK_SIZE since "RISC-V > * Instruction Set Manual Volume II: Privileged Architecture" states that > * "load and store effective addresses, which are 64bits, must have bits > * 63–48 all equal to bit 47, or else a page-fault exception will occur." > + * Similarly for SV57, bits 63–57 must be equal to bit 56. > */ > #ifdef CONFIG_64BIT > #define TASK_SIZE_64 (PGDIR_SIZE * PTRS_PER_PGD / 2) > -- > 2.41.0 > You can add: Reviewed-by: Alexandre Ghiti <alexghiti@xxxxxxxxxxxx> Thanks, Alex
