On 03/08/2010 04:14 PM, Alexander Graf wrote:
We're looking at two different ifs here. 1) GPR Inside the PACA or not (volatile vs non-volatile) This is constant. Volatile registers go to the PACA; non-volatiles go to the vcpu struct.
Okay - so no if ().
2) GPR actually loaded in the PACA When we're in vcpu_load context the registers in the PACA, when not they're in the vcpu struct If you have a really easy and fast way to assure that we're always inside a vcpu_load context, all is great. I could probably even just put in a BUG_ON(not in vcpu_load context) and make the callers safe. But some check needs to be done.
x86 assumes in vcpu_load() context (without even a BUG_ON()). KVM_GET_REGS and friends are responsible for this.
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