On Tue, Nov 23, 2021 at 10:34 AM Randy Dunlap <rdunlap@xxxxxxxxxxxxx> wrote: > > On 11/22/21 5:57 PM, guoren@xxxxxxxxxx wrote: > > From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> > > > > The firmware of riscv (such as opensbi) occupy 2MB(64bit) / > > 4MB(32bit) in Linux. It's very wasteful to small memory footprint > > soc chip such as Allwinner D1s/F133. The kernel parameter gives a > > chance to users to set the proper size of the firmware and get > > more than 1.5MB of memory. > > > > Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> > > Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx> > > Cc: Anup Patel <anup.patel@xxxxxxx> > > Cc: Atish Patra <atishp@xxxxxxxxxxxx> > > --- > > Documentation/admin-guide/kernel-parameters.txt | 3 +++ > > 1 file changed, 3 insertions(+) > > > > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > > index 9725c546a0d4..ee505743c8f4 100644 > > --- a/Documentation/admin-guide/kernel-parameters.txt > > +++ b/Documentation/admin-guide/kernel-parameters.txt > > @@ -4964,6 +4964,9 @@ > > [KNL] Disable ring 3 MONITOR/MWAIT feature on supported > > CPUs. > > > > + riscv.fwsz=nn[KMG] > > + [RISC-V] Determine firmware size to save memory > > Is "Determine" like "Set"? The user is setting (telling the software) > the firmware size? I mean "Set" here, thx for pointing it out. > > "Determine" makes it sound to me like the Linux software is somehow > helping to determine the firmware size. > > > + > > ro [KNL] Mount root device read-only on boot > > > > rodata= [KNL] > > > > > -- > ~Randy -- Best Regards Guo Ren ML: https://lore.kernel.org/linux-csky/
