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Re: [PATCH 2/7] powerpc: introduce ePAPR embedded hypervisor hcall interface



On May 19, 2011, at 8:54 AM, Timur Tabi wrote:

> ePAPR hypervisors provide operating system services via a "hypercall"
> interface.  The following steps need to be performed to make an hcall:
> 
> 1. Load r11 with the hcall number
> 2. Load specific other registers with parameters
> 3. Issue instrucion "sc 1"
> 4. The return code is in r3
> 5. Other returned parameters are in other registers.
> 
> To provide this service to the kernel, these steps are wrapped in inline
> assembly functions.  Standard ePAPR hcalls are in epapr_hcalls.h, and Freescale
> extensions are in fsl_hcalls.h.
> 
> Signed-off-by: Timur Tabi <timur@xxxxxxxxxxxxx>
> ---
> arch/powerpc/include/asm/epapr_hcalls.h |  502 +++++++++++++++++++++++
> arch/powerpc/include/asm/fsl_hcalls.h   |  655 +++++++++++++++++++++++++++++++
> 2 files changed, 1157 insertions(+), 0 deletions(-)
> create mode 100644 arch/powerpc/include/asm/epapr_hcalls.h
> create mode 100644 arch/powerpc/include/asm/fsl_hcalls.h

applied to next

- k
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