[PATCH 08/26] KVM: PPC: Add PV guest critical sections

[Alexander Graf]

Am 27.06.2010 um 12:59 schrieb Avi Kivity <avi at redhat.com>:

> On 06/27/2010 01:33 PM, Alexander Graf wrote:
>>> Or inc/dec...
>>
>>
>> Uh - huh? How would that help?
>
> inc shared->critical   # disable interrupts

There is no opcode in the ppc isa that acts on momery without  
involving a register.

An inc would be:

ld rX, A(0)
addi rX, rX, 1
std rX, A(0)

Alex
>