On 02.08.2012, at 09:08, Raghavendra K T [off-list ref] wrote:

On 08/01/2012 11:55 PM, Marcelo Tosatti wrote:

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On Wed, Aug 01, 2012 at 04:19:01PM +0530, Raghavendra K T wrote:

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On 08/01/2012 08:37 AM, Marcelo Tosatti wrote:

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On Tue, Jul 24, 2012 at 02:23:59PM +0530, Raghavendra K T wrote:

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From: Raghavendra K T<redacted>

Thanks Alex for KVM_HC_FEATURES inputs and Jan for VAPIC_POLL_IRQ,
and Peter (HPA) for suggesting hypercall ABI addition.

Signed-off-by: Raghavendra K T<redacted>
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+
+ Up to four arguments may be passed in rbx, rcx, rdx, and rsi respectively.
+ The hypercall number should be placed in rax and the return value will be
+ placed in rax.  No other registers will be clobbered unless explicitly stated
+ by the particular hypercall.

It depends on the hypercall. It happens that current hypercalls use
the four registers, but its not an ABI (hyper-v hypercalls uses r8, for example).

Okay, agree. I did not know about hyper-v. Above one is for X86 and
KVM  (and not X86 / hyper-v). So I should remove ABI and probably say,

Just say "Linux x86 Hypercall", yeah.

Ok, Thanks Marcelo.will respin patches with the changes you suggested.

Also I would  like add Alex's description on ppc hypercalls
into Documentation/virtual/kvm/ppc-pv.txt with Alex from/sob or
suggested-by in a separate patch unless I see any objection to that.

Yeah, don't stall this on me :)

Alex