Re: [Xen-devel] [PATCH v2 2/4] x86/dom0: prevent PVH Dom0 from mapping read-only the IO APIC area

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Roger Pau Monne
> Sent: Saturday, August 12, 2017 12:43 AM
> 
> This is emulated by Xen and must not be mapped into PVH Dom0 p2m.

same comment as previous one. please send it separately.

> 
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> ---
> Cc: Jan Beulich <jbeulich@xxxxxxxx>
> Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> ---
>  xen/arch/x86/dom0_build.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/xen/arch/x86/dom0_build.c b/xen/arch/x86/dom0_build.c
> index 3e0910d779..804efee1a9 100644
> --- a/xen/arch/x86/dom0_build.c
> +++ b/xen/arch/x86/dom0_build.c
> @@ -402,7 +402,7 @@ int __init dom0_setup_permissions(struct domain
> *d)
>      for ( i = 0; i < nr_ioapics; i++ )
>      {
>          mfn = paddr_to_pfn(mp_ioapics[i].mpc_apicaddr);
> -        if ( !rangeset_contains_singleton(mmio_ro_ranges, mfn) )
> +        if ( dom0_pvh || !rangeset_contains_singleton(mmio_ro_ranges,
> mfn) )
>              rc |= iomem_deny_access(d, mfn, mfn);
>      }
>      /* MSI range. */
> --
> 2.11.0 (Apple Git-81)
> 
> 
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