在 2023/2/14 17:58, Greg Kroah-Hartman 写道: > On Tue, Feb 14, 2023 at 05:00:56PM +0800, Tianrui Zhao wrote: >>>> +#define KVM_GET_CSRS _IOWR(KVMIO, 0xc5, struct kvm_csrs) >>>> +#define KVM_SET_CSRS _IOW(KVMIO, 0xc6, struct kvm_csrs) >>> Why does this arch need new ioctls? >> We want to use this ioctl to access multiple csrs at one time. If without >> this, we only access one csr. > > What is wrong with accessing only one csr at a time? Isn't this what > other architectures do? It is ok to access CSR register once at a time, the other platforms do this except x86 platform. Only that I think that batch method is better such as KVM_GET/SET_MSRS ioctl cmds in x86. Regards Bibo, Mao > >> There is another function, can we use the KVM_GET/SET_MSRS to access our >> csrs? > > I do not know, that's up to the KVM developers to answer. > > thanks, > > greg k-h
