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Re: [PATCH 1/7] target/ppc: Enforce that the root page directory size mu


From: Greg Kurz
Subject: Re: [PATCH 1/7] target/ppc: Enforce that the root page directory size must be at least 5
Date: Mon, 30 Mar 2020 12:45:33 +0200

On Mon, 30 Mar 2020 11:49:40 +0200
Cédric Le Goater <address@hidden> wrote:

> From: Suraj Jitindar Singh <address@hidden>
> 
> 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 <address@hidden>
> Reviewed-by: David Gibson <address@hidden>
> Signed-off-by: Cédric Le Goater <address@hidden>
> ---

Reviewed-by: Greg Kurz <address@hidden>

>  target/ppc/mmu-radix64.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/target/ppc/mmu-radix64.c b/target/ppc/mmu-radix64.c
> index 224e646c5094..99678570581b 100644
> --- a/target/ppc/mmu-radix64.c
> +++ b/target/ppc/mmu-radix64.c
> @@ -212,6 +212,9 @@ 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;
>  }




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