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KVM: PPC: Book3S HV: Outline of KVM-HV HPT resizing implementation

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This adds a not yet working outline of the HPT resizing PAPR
extension.  Specifically it adds the necessary ioctl() functions,
their basic steps, the work function which will handle preparation for
the resize, and synchronization between these, the guest page fault
path and guest HPT update path.

The actual guts of the implementation isn't here yet, so for now the
calls will always fail.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
David Gibson
2016-12-20 16:49:05 +11:00
committed by Paul Mackerras
parent 639e459768
commit 5e9859699a
4 changed files with 223 additions and 0 deletions
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4
arch/powerpc/include/asm/kvm_ppc.h
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@@ -215,6 +215,10 @@ extern void kvmppc_bookehv_exit(void);
extern int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu);
extern int kvm_vm_ioctl_get_htab_fd(struct kvm *kvm, struct kvm_get_htab_fd *);
extern long kvm_vm_ioctl_resize_hpt_prepare(struct kvm *kvm,
struct kvm_ppc_resize_hpt *rhpt);
extern long kvm_vm_ioctl_resize_hpt_commit(struct kvm *kvm,
struct kvm_ppc_resize_hpt *rhpt);
int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq);