Messages in this thread | | | Subject | Re: [PATCH] x86/sev: Check whether SEV or SME is supported first | From | Pu Wen <> | Date | Mon, 31 May 2021 22:56:50 +0800 |
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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.
-- Regards, Pu Wen
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