On 08/01/2012 11:55 PM, Marcelo Tosatti wrote:
On Wed, Aug 01, 2012 at 04:19:01PM +0530, Raghavendra K T wrote:
On 08/01/2012 08:37 AM, Marcelo Tosatti wrote:
On Tue, Jul 24, 2012 at 02:23:59PM +0530, Raghavendra K T wrote:
From: Raghavendra K T<raghavendra.kt@xxxxxxxxxxxxxxxxxx>
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<raghavendra.kt@xxxxxxxxxxxxxxxxxx>
---
[...]
+
+ 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.
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