KVM: PPC: Book3S PR: Add emulation for trechkpt.
This patch adds host emulation when guest PR KVM executes "trechkpt.", which is a privileged instruction and will trap into host. We firstly copy vcpu ongoing content into vcpu tm checkpoint content, then perform kvmppc_restore_tm_pr() to do trechkpt. with updated vcpu tm checkpoint values. Signed-off-by: NSimon Guo <wei.guo.simon@gmail.com> Signed-off-by: NPaul Mackerras <paulus@ozlabs.org>
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