On Sat, 12 Jun 2021 17:04:16 +0100, Anup Patel <anup.patel@xxxxxxx> wrote: > > If IPI calls are injected using SBI IPI calls then remote TLB flush > using SBI RFENCE calls is much faster because using IPIs for remote > TLB flush would still endup as SBI IPI calls with extra processing > on kernel side. > > It is now possible to have specialized hardware (such as RISC-V AIA) > which allows S-mode software to directly inject IPIs without any > assistance from M-mode runtime firmware. > > This patch extends remote TLB flush functions to use IPIs whenever > underlying IPI operations are suitable for remote FENCEs. > > Signed-off-by: Anup Patel <anup.patel@xxxxxxx> > --- > arch/riscv/mm/tlbflush.c | 62 +++++++++++++++++++++++++++++++--------- > 1 file changed, 48 insertions(+), 14 deletions(-) > > diff --git a/arch/riscv/mm/tlbflush.c b/arch/riscv/mm/tlbflush.c > index 720b443c4528..009c56fa102d 100644 > --- a/arch/riscv/mm/tlbflush.c > +++ b/arch/riscv/mm/tlbflush.c > @@ -1,39 +1,73 @@ > // SPDX-License-Identifier: GPL-2.0 > +/* > + * TLB flush implementation. > + * > + * Copyright (c) 2021 Western Digital Corporation or its affiliates. > + */ I find this a bit odd. You don't mention this addition in the commit message, and a quick look at the commits touching tlbflush.[ch] doesn't make the copyright assignment obvious (most commits originate from either SiFive or Christoph). In any way, please keep this kind of changes out of this series if possible, and have a separate discussion on who gets to brag about this code. Thanks, M. -- Without deviation from the norm, progress is not possible.
