On 2021/5/31 17:37, Joerg Roedel wrote:
On Thu, May 27, 2021 at 11:08:32PM +0800, Pu Wen wrote:
Reading MSR_AMD64_SEV which is not implemented on Hygon Dhyana CPU will cause the kernel reboot, and native_read_msr_safe() has no help.
The reason for the reboot is that there is no #GP or #DF handler set up when this MSR is read, so its propagated to a shutdown event. But there is an IDT already, so you can set up early and #GP handler to fix the reboot.
Thanks for your suggestion, I'll try to set up early #GP handler to fix the problem.