From: Anup Patel <anup@brainfault.org>
To: Atish Patra <atish.patra@wdc.com>
Cc: Damien Le Moal <Damien.LeMoal@wdc.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Anup Patel <anup.patel@wdc.com>,
"linux-kernel@vger.kernel.org List"
<linux-kernel@vger.kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>, Zong Li <zong.li@sifive.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Alistair Francis <Alistair.Francis@wdc.com>,
linux-riscv <linux-riscv@lists.infradead.org>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH] RISC-V: Make sure memblock reserves the memory containing DT
Date: Fri, 2 Oct 2020 15:41:57 +0530 [thread overview]
Message-ID: <CAAhSdy11LqKFGA37cz8jYw9UtT+Niu7qKFm38jHP=49OYs0PFw@mail.gmail.com> (raw)
In-Reply-To: <20201001190456.2860155-1-atish.patra@wdc.com>
On Fri, Oct 2, 2020 at 12:35 AM Atish Patra <atish.patra@wdc.com> wrote:
>
> Currently, the memory containing DT is not reserved. Thus, that region
> of memory can be reallocated or reused for other purposes. This may result
> in corrupted DT for nommu virt board in Qemu. We may not face any issue
> in kendryte as DT is embedded in the kernel image for that.
>
> Fixes: 6bd33e1ece52 ("riscv: add nommu support")
> Signed-off-by: Atish Patra <atish.patra@wdc.com>
>
> ---
> @Palmer This patch is applicable for v5.9 & before. This fix is already
> part of the "RISC-V: Move DT mapping outof fixmap" patch from UEFI support
> series. That's why, this patch doesn't need to go into for-next.
> ---
> arch/riscv/mm/init.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
> index 564e0be677b7..cabf1697e748 100644
> --- a/arch/riscv/mm/init.c
> +++ b/arch/riscv/mm/init.c
> @@ -510,6 +510,7 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa)
> #else
> dtb_early_va = (void *)dtb_pa;
> #endif
> + dtb_early_pa = dtb_pa;
> }
>
> static inline void setup_vm_final(void)
> --
> 2.25.1
>
Looks good to me.
Reviewed-by: Anup Patel <anup@brainfault.org>
Regards,
Anup
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next prev parent reply other threads:[~2020-10-02 10:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-01 19:04 [PATCH] RISC-V: Make sure memblock reserves the memory containing DT Atish Patra
2020-10-02 10:11 ` Anup Patel [this message]
2020-10-04 23:20 ` Palmer Dabbelt
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