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

2017-10-31 Thread Michael S. Tsirkin
On Tue, Oct 31, 2017 at 09:55:39AM +, Hatayama, Daisuke wrote: > > > > -Original Message- > > From: linux-kernel-ow...@vger.kernel.org > > [mailto:linux-kernel-ow...@vger.kernel.org] On Behalf Of Michael S. Tsirkin > > Sent: Tuesday, October 31, 2017 1:19 AM > > To: Hatayama, Daisuke

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

2017-10-31 Thread Hatayama, Daisuke
> -Original Message- > From: linux-kernel-ow...@vger.kernel.org > [mailto:linux-kernel-ow...@vger.kernel.org] On Behalf Of Michael S. Tsirkin > Sent: Tuesday, October 31, 2017 1:19 AM > To: Hatayama, Daisuke > Cc: 'marcandre.lur...@redhat.com'

Re: [Qemu-devel] [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

Re: [Qemu-devel] [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?)

[Qemu-devel] [PATCH v3 5/5] RFC: fw_cfg: add DMA write operation in sysfs

2017-09-22 Thread marcandre . lureau
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. Signed-off-by: Marc-André Lureau