linux-kernel - Re: [PATCH -fixes 0/3] Fixes regarding CONFIG_PHYS_RAM

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Date:   Thu, 22 Jul 2021 23:29:23 +0800
From:   Jisheng Zhang <jszhang3@...l.ustc.edu.cn>
To:     Alexandre Ghiti <alex@...ti.fr>
Cc:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -fixes 0/3] Fixes regarding CONFIG_PHYS_RAM_BASE

On Wed, 21 Jul 2021 09:59:34 +0200
Alexandre Ghiti <alex@...ti.fr> wrote:

> The following commits: 
> 
> 7094e6acaf7a ("riscv: Simplify xip and !xip kernel address conversion macros")
> 9b79878ced8f ("riscv: Remove CONFIG_PHYS_RAM_BASE_FIXED")
> 
> expose CONFIG_PHYS_RAM_BASE for all kernel types whereas this value is
> implementation-specific, so that breaks the kernel genericity.
> 
> The first patch in this patchset removes the usage of CONFIG_PHYS_RAM_BASE
> by introducing a new global variable that holds this value.
> 
> The second patch reverts 9b79878ced8f ("riscv: Remove 
> CONFIG_PHYS_RAM_BASE_FIXED").
> 
> The last patch is an optimization 'symmetrical' to the one introduced in
> the first patch: this is not a fix, then it is not necessary to pull
> this into -fixes.
> 

Reviewed-by: Jisheng Zhang <jszhang@...nel.org>

> Alexandre Ghiti (3):
>   riscv: Get rid of CONFIG_PHYS_RAM_BASE in kernel physical address
>     conversion
>   Revert "riscv: Remove CONFIG_PHYS_RAM_BASE_FIXED"
>   riscv: Optimize kernel virtual address conversion macro
> 
>  arch/riscv/Kconfig            |  6 ++++++
>  arch/riscv/include/asm/page.h |  9 +++++----
>  arch/riscv/mm/init.c          | 17 ++++++++++++-----
>  3 files changed, 23 insertions(+), 9 deletions(-)
>