Paul Mackerras <paulus@xxxxxxxxx> writes: > Currently PR-style KVM keeps the volatile guest register values > (R0 - R13, CR, LR, CTR, XER, PC) in a shadow_vcpu struct rather than > the main kvm_vcpu struct. For 64-bit, the shadow_vcpu exists in two > places, a kmalloc'd struct and in the PACA, and it gets copied back > and forth in kvmppc_core_vcpu_load/put(), because the real-mode code > can't rely on being able to access the kmalloc'd struct. > > This changes the code to copy the volatile values into the shadow_vcpu > as one of the last things done before entering the guest. Similarly > the values are copied back out of the shadow_vcpu to the kvm_vcpu > immediately after exiting the guest. We arrange for interrupts to be > still disabled at this point so that we can't get preempted on 64-bit > and end up copying values from the wrong PACA. Can we remove kvmppc_vcpu_book3s.shadow_vcpu in this patch ? Do we still use the kmalloc'd shadow_vcpu ? -aneesh -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
