Hollis Blanchard wrote: > On Thu, 2007-11-08 at 14:49 +0100, Carsten Otte wrote: >> Zhang, Xiantao wrote: >>> +void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); >>> +void kvm_arch_vcpu_decache(struct kvm_vcpu *vcpu); >>> +void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); >>> +void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); >>> +struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int >>> id); >>> + >>> +int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu); >>> +void kvm_arch_hardware_enable(void *garbage); >>> +void kvm_arch_hardware_disable(void *garbage); >>> +int kvm_arch_hardware_setup(void); >>> +void kvm_arch_hardware_unsetup(void); >>> +void kvm_arch_check_processor_compat(void *rtn); >> I don't like the generic introduction of all x86_ops wrappers into the >> arch callbacks. I would rather prefer to work out a different split >> between common and arch specifics - at least in the following cases: >> - unloading the mmu needs to be moved out of kvm_free_vcpus into the >> arch part, because we don't have a shaddow mmu on s390 >> - decache_vcpus_on_cpu should be arch-dependent alltogether, rather >> than having a per cpu callback. We've got nothing to decache, so the >> entire thing is a nop for us. >> - vcpu_reset works very different for our architecture, we'd need an >> initial processor status word. I'd prefer to keep the existence of >> this callback arch dependent. >> - hardware enable/disable/setup/unsetup/check_processor_compat does not >> make any sense for us: all CPUs that have been sold since the 1970s have >> proper hardware virtualization, and there's nothing to enable - it just >> works. > > Sounds fine to me: you're just proposing to move the abstraction one > level higher in some places. That's right, I'd like to drag the bar a little where the common code does something just to call a callback that is nop for us.
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