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Re: [Qemu-devel] [PATCH v3] spapr_vio/spapr_iommu: Move VIO bypass where
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From: |
Alexander Graf |
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Subject: |
Re: [Qemu-devel] [PATCH v3] spapr_vio/spapr_iommu: Move VIO bypass where it belongs |
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Date: |
Thu, 29 Jan 2015 14:08:06 +0100 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 |
On 29.01.15 06:04, Alexey Kardashevskiy wrote:
> Instead of tweaking a TCE table device by adding there a bypass flag,
> let's add an alias to RAM and IOMMU memory region, and enable/disable
> those according to the selected bypass mode.
> This way IOMMU memory region can have size of the actual window rather
> than ram_size which is essential for upcoming DDW support.
>
> This moves bypass logic to VIO layer and keeps @bypass flag in TCE table
> for migration compatibility only. This replaces spapr_tce_set_bypass()
> calls with explicit assignment to avoid confusion as the function could
> do something more that just syncing the @bypass flag.
>
> This adds a pointer to VIO device into the sPAPRTCETable struct to provide
> the sPAPRTCETable device a way to update bypass mode for the VIO device.
>
> Signed-off-by: Alexey Kardashevskiy <address@hidden>
Thanks, applied to ppc-next.
Alex