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

[Avi Kivity <avi@xxxxxxxxxx>]

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@xxxxxxxxxxxxxxxxxxx>
> ---
>  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

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