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[76.210.143.223]) by smtp.gmail.com with ESMTPSA id h9sm9460508pfc.28.2020.10.04.16.20.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 04 Oct 2020 16:20:40 -0700 (PDT) Date: Sun, 04 Oct 2020 16:20:40 -0700 (PDT) X-Google-Original-Date: Sun, 04 Oct 2020 16:20:36 PDT (-0700) Subject: Re: [PATCH] RISC-V: Make sure memblock reserves the memory containing DT In-Reply-To: <20201001190456.2860155-1-atish.patra@wdc.com> CC: linux-kernel@vger.kernel.org, Atish Patra , aou@eecs.berkeley.edu, Anup Patel , linux-riscv@lists.infradead.org, Paul Walmsley , zong.li@sifive.com, Alistair Francis , Damien Le Moal , Christoph Hellwig From: Palmer Dabbelt To: Atish Patra Message-ID: Mime-Version: 1.0 (MHng) Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 01 Oct 2020 12:04:56 PDT (-0700), Atish Patra 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 > > --- > @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) Thanks, this is on fixes.