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Re: [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-
From: |
Mihai Claudiu Caraman |
Subject: |
Re: [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-coherent |
Date: |
Fri, 3 Jun 2016 15:16:07 +0000 |
> -----Original Message-----
> From: Peter Maydell [mailto:address@hidden
> Sent: Friday, June 03, 2016 5:38 PM
> To: Mihai Claudiu Caraman <address@hidden>
> Cc: Bogdan Purcareata <address@hidden>; QEMU Developers <address@hidden>;
> Peter Crosthwaite <address@hidden>; Alexander Graf <address@hidden>; qemu-arm
> <address@hidden>; Eric Auger <address@hidden>
> Subject: Re: [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as
> dma-coherent
>
> On 3 June 2016 at 15:22, Mihai Claudiu Caraman <address@hidden> wrote:
> > In particular for virtual and emulated devices the host CPU behaves as
> > a DMA coherent 'device'. This should have been stated in patch
> > description.
>
> Wouldn't that imply that we should just always have the "dma-coherent"
> property set, and we don't need to do any of the messing around looking at
> the host sysfs ?
>
> thanks
> -- PMM
We can always set "dma-coherent" for virtual and emulated devices but not for
passthrough devices. So we can't have one PCIe controller for all devices
marked as "dma-coherent".
Regards,
Mike
- [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-coherent, (continued)
- [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-coherent, Bogdan Purcareata, 2016/06/02
- Re: [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-coherent, Peter Maydell, 2016/06/02
- Re: [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-coherent, Alexander Graf, 2016/06/02
- Re: [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-coherent, Auger Eric, 2016/06/07
- Re: [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-coherent, Ard Biesheuvel, 2016/06/16
- Re: [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-coherent, Peter Maydell, 2016/06/28
- Re: [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-coherent, Bogdan Purcareata, 2016/06/29
- Re: [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-coherent, Mihai Claudiu Caraman, 2016/06/03
- Re: [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-coherent, Peter Maydell, 2016/06/03
- Re: [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-coherent, agraf, 2016/06/03
- Re: [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-coherent,
Mihai Claudiu Caraman <=
- Re: [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-coherent, Alexander Graf, 2016/06/03
- Re: [Qemu-devel] [PATCH 2/2] arm/virt: Mark pcie controller node as dma-coherent, Mihai Claudiu Caraman, 2016/06/03
[Qemu-devel] [PATCH 1/2] device_tree: introduce qemu_fdt_node_path_prop, Bogdan Purcareata, 2016/06/02