在 2023年02月14日 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?
Generally, using KVM_GET_ONE_GET ioctl to get one reg, but we want a
more convenient interface to get serial regs at one time, so we add this
ioctl.
And in x86 platform, using KVM_GET_MSRS to access multiple registers. and
our functions reference this.
Thanks,
Tianrui Zhao
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
