Re: [PATCH] spapr: Add "memop" hypercall

Avi Kivity
2012-05-21T09:47:15Z

On 05/21/2012 10:24 AM, Benjamin Herrenschmidt wrote:
> This adds a kvm-specific hypervisor call to the pseries machine
> which allows to do what amounts to memmove, memcpy and xor over
> regions of physical memory such as the framebuffer.
>
> This is the simplest way to get usable framebuffer speed from
> SLOF since the framebuffer isn't mapped in the VRMA and so would
> otherwise require an hcall per 8 bytes access.
>
> The performance is still not great but usable, and can be improved
> with a more complex implementation of the hcall itself if needed.
>
> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> ---
> hw/spapr.h | 3 ++-
> hw/spapr_hcall.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 51 insertions(+), 1 deletion(-)
>

Shouldn't these be documented somewhere?

--
error compiling committee.c: too many arguments to function