On 12/07/2018 11:18, Robert Hoo wrote: >>> And you'd like to set IA32_ARCH_CAPABILITIES.RSBA by default in qemu or >>> kvm layer? >> Probably we need to make this decision in QEMU. If KVM set RSBA >> automatically on .get_msr_feature(), QEMU won't be able to >> differentiate a host with RSBA set from a host with RSBA unset. >> > What's the default value for MSR IA32_ARCH_CAPABILITIES? is it clear > now? >
It's the host value. However, QEMU never sets the CPUID bit so it doesn't matter if you are using QEMU. Paolo
