Re: [PATCH v3 5/5] RFC: fw_cfg: add DMA write operation in sysfs

2017-10-31 Thread Michael S. Tsirkin
9 AM > > To: Hatayama, Daisuke > > Cc: 'marcandre.lur...@redhat.com' ; > > 'so...@cmu.edu' ; linux-kernel@vger.kernel.org; > > 'qemu-de...@nongnu.org' > > Subject: Re: [PATCH v3 5/5] RFC: fw_cfg: add DMA write operation in sysfs >

RE: [PATCH v3 5/5] RFC: fw_cfg: add DMA write operation in sysfs

2017-10-31 Thread Hatayama, Daisuke
'so...@cmu.edu' ; linux-kernel@vger.kernel.org; > 'qemu-de...@nongnu.org' > Subject: Re: [PATCH v3 5/5] RFC: fw_cfg: add DMA write operation in sysfs > > On Mon, Oct 30, 2017 at 11:07:20AM +, Hatayama, Daisuke wrote: > > > From: Marc-André Lureau > > &g

Re: [PATCH v3 5/5] RFC: fw_cfg: add DMA write operation in sysfs

2017-10-30 Thread Michael S. Tsirkin
On Mon, Oct 30, 2017 at 11:07:20AM +, Hatayama, Daisuke wrote: > > From: Marc-André Lureau > > > > Since qemu 2.9, DMA write operations are allowed. However, usage of this > > interface from kernel or user-space is strongly discouraged by the > > maintainers. This patch is meant for experiment

RE: [PATCH v3 5/5] RFC: fw_cfg: add DMA write operation in sysfs

2017-10-30 Thread Hatayama, Daisuke
> From: Marc-André Lureau > > Since qemu 2.9, DMA write operations are allowed. However, usage of this > interface from kernel or user-space is strongly discouraged by the > maintainers. This patch is meant for experimentations for now. > Could you (or maintainers?) tell me how experimental the D