linux-kernel - Re: [RFC PATCH v1 0/5] x86/boot, KVM: Move VMXON/VMXOFF handling from KVM to CPU lifecycle

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Message-ID: <eacc2a0a-2215-4582-bf08-9c199cf23018@intel.com>
Date: Thu, 11 Sep 2025 08:20:38 -0700
From: Dave Hansen <dave.hansen@...el.com>
To: Sean Christopherson <seanjc@...gle.com>, "Xin Li (Intel)" <xin@...or.com>
Cc: linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
 linux-pm@...r.kernel.org, pbonzini@...hat.com, tglx@...utronix.de,
 mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com, x86@...nel.org,
 hpa@...or.com, rafael@...nel.org, pavel@...nel.org, brgerst@...il.com,
 david.kaplan@....com, peterz@...radead.org, andrew.cooper3@...rix.com,
 kprateek.nayak@....com, arjan@...ux.intel.com, chao.gao@...el.com,
 rick.p.edgecombe@...el.com, dan.j.williams@...el.com
Subject: Re: [RFC PATCH v1 0/5] x86/boot, KVM: Move VMXON/VMXOFF handling from
 KVM to CPU lifecycle

On 9/11/25 07:20, Sean Christopherson wrote:
> VPID and ASID allocation need to be managed system-wide, otherwise
> running KVM alongside another hypervisor-like entity will result in
> data corruption due to shared TLB state.
What other hypervisor-like entities are out there?

The TDX module needs (or will need) VMXON for some things that aren't
strictly for virtualization. But what other entities are out there?