Re: [Qemu-devel] [QEMU-PPC] [PATCH 06/13] target/ppc: Enforce that the root page directory size must be at least 5

[David Gibson <david@gibson.dropbear.id.au>]

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On Fri, May 03, 2019 at 03:53:09PM +1000, Suraj Jitindar Singh wrote:
> According to the ISA the root page directory size of a radix tree for
> either process or partition scoped translation must be >= 5.
> 
> Thus add this to the list of conditions checked when validating the
> partition table entry in validate_pate();
> 
> Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

> ---
>  target/ppc/mmu-radix64.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/target/ppc/mmu-radix64.c b/target/ppc/mmu-radix64.c
> index a6ab290323..afa5ba506a 100644
> --- a/target/ppc/mmu-radix64.c
> +++ b/target/ppc/mmu-radix64.c
> @@ -249,6 +249,8 @@ static bool validate_pate(PowerPCCPU *cpu, uint64_t lpid, ppc_v3_pate_t *pate)
>      if (lpid == 0 && !msr_hv) {
>          return false;
>      }
> +    if ((pate->dw0 & PATE1_R_PRTS) < 5)
> +        return false;
>      /* More checks ... */
>      return true;
>  }

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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