Re: [Xen-devel] [PATCH v2 4/9] x86/vmx: Support remote access to the MSR lists
>>> On 08.06.18 at 20:48, wrote:
> 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
Reviewed-by: Jan Beulich
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Re: [Xen-devel] [PATCH v2 4/9] x86/vmx: Support remote access to the MSR lists
> From: Andrew Cooper [mailto:andrew.coop...@citrix.com]
> 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
Acked-by: Kevin Tian
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