Re: [PATCH v4 01/15] x86/msr: Add missing includes of <asm/msr.h>

[Xin Li <xin@xxxxxxxxx>]

On 4/29/2025 9:20 PM, Michael Kelley wrote:
> > Also under hyperv/ not all files are covered but I'm a bit hesitant to
> > suggest a change there since I'm not sure if they (hypervisors) do
> > something special w.r.t. msr.
> I've worked on the Hyper-V code in Linux for 8 years or so, first as
> a Microsoft employee, and more recently as a retiree. 🙂 I'm not
> aware of anything special w.r.t. MSR access for Hyper-V guests.
> All the normal Linux code for accessing MSRs just works. Hyper-V
> *does* provide a set of synthetic MSRs that are unique to
> Hyper-V, but they are also accessed using normal Linux code. Of
> course, at runtime the access to these synthetic MSRs always
> traps to the hypervisor.
>
> I'm planning to apply Xin Li's patch set and make sure nothing
> breaks for Hyper-V guests, and particularly when running as an
> SEV-SNP or TDX guest. Hopefully I can do that by early next week
> at the latest.
Hi Michael, I appreciate it!