Re: [Qemu-devel] [PATCH RFC v3 12/14] intel_iommu: do replay when context invalidate

[Jason Wang <jasowang@redhat.com>]

On 2017年01月13日 11:06, Peter Xu wrote:
> Before this one we only invalidate context cache when we receive context
> entry invalidations. However it's possible that the invalidation also
> contains a domain switch (only if cache-mode is enabled for vIOMMU).

So let's check for CM before replaying?

>   In
> that case we need to notify all the registered components about the new
> mapping.
>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>   hw/i386/intel_iommu.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
> index 59bf683..fd75112 100644
> --- a/hw/i386/intel_iommu.c
> +++ b/hw/i386/intel_iommu.c
> @@ -1162,6 +1162,7 @@ static void vtd_context_device_invalidate(IntelIOMMUState *s,
>                   trace_vtd_inv_desc_cc_device(bus_n, (devfn_it >> 3) & 0x1f,
>                                                devfn_it & 3);
>                   vtd_as->context_cache_entry.context_cache_gen = 0;
> +                memory_region_iommu_replay_all(&vtd_as->iommu);
>               }
>           }
>       }