On 7/23/20 3:50 PM, Ravi Bangoria wrote:
Patch #1, #2 and #3 enables p10 2nd DAWR feature for Book3S kvm guest. DAWR is a hypervisor resource and thus H_SET_MODE hcall is used to set/unset it. A new case H_SET_MODE_RESOURCE_SET_DAWR1 is introduced in H_SET_MODE hcall for setting/unsetting 2nd DAWR. Also, new capability KVM_CAP_PPC_DAWR1 has been added to query 2nd DAWR support via kvm ioctl.
This feature also needs to be enabled in Qemu to really use it. I'll reply link to qemu patches once I post them in qemu-devel mailing list.