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RISC-V: Make sure memblock reserves the memory containing DT

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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")
Cc: stable@vger.kernel.org
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
Atish Patra 2020-10-01 12:04:56 -07:00 committed by Palmer Dabbelt
parent 549738f15d
commit a78c6f5956
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arch/riscv/mm/init.c
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@ -515,6 +515,7 @@ 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)