Re: [Xen-devel] [PATCH v2 4/9] x86/vmx: Support remote access to the MSR lists

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Andrew Cooper [mailto:andrew.cooper3@xxxxxxxxxx]
> Sent: Saturday, June 9, 2018 2:49 AM
> 
> At the moment, all modifications of the MSR lists are in current context.
> However, future changes may need to put MSR_EFER into the lists from
> domctl
> hypercall context.
> 
> Plumb a struct vcpu parameter down through the infrastructure, and use
> vmx_vmcs_{enter,exit}() for safe access to the VMCS in vmx_add_msr().
> Use
> assertions to ensure that access is either in current context, or while the
> vcpu is paused.
> 
> Note these expectations beside the fields in arch_vmx_struct, and reorder
> the
> fields to avoid unnecessary padding.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>
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