Re: [Xen-devel] guest crash in wrmsr_hypervisor_regs if hypercall page is paged out

[Olaf Hering <olaf@xxxxxxxxx>]

On Thu, May 02, Jan Beulich wrote:

> We can't put a vCPU to sleep at arbitrary points yet, which means
> that right now the caller of the function is responsible for the
> wait-and-retry - normally that would be in hypercall handlers, but
> obviously you need this here too.

Yes, thats the issue.

vmx_msr_write_intercept and svm_msr_write_intercept could just return
X86EMUL_RETRY to their callers.

How should emulate_privileged_op handle the wrmsr_hypervisor_regs
failure due to a paged page?


Olaf

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