Re: [PATCH 1/2] KVM: x86/mmu: Add RET_PF_RETRY_INVALID_SLOT for fault retry on invalid slot

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To: "seanjc@xxxxxxxxxx" <seanjc@xxxxxxxxxx>
Subject: Re: [PATCH 1/2] KVM: x86/mmu: Add RET_PF_RETRY_INVALID_SLOT for fault retry on invalid slot
From: "Edgecombe, Rick P" <rick.p.edgecombe@xxxxxxxxx>
Date: Mon, 19 May 2025 16:17:25 +0000
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Cc: "kvm@xxxxxxxxxxxxxxx" <kvm@xxxxxxxxxxxxxxx>, "Chatre, Reinette" <reinette.chatre@xxxxxxxxx>, "pbonzini@xxxxxxxxxx" <pbonzini@xxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "Zhao, Yan Y" <yan.y.zhao@xxxxxxxxx>
In-reply-to: <aCtT9zsGmPiH2S6L@google.com>
References: <20250519023613.30329-1-yan.y.zhao@intel.com> <20250519023737.30360-1-yan.y.zhao@intel.com> <aCsy-m_esVjy8Pey@google.com> <8f9df54a-ada6-4887-9537-de2a51eff841@intel.com> <34609df5b649ca9f53dfe6f5a134445f1c17279a.camel@intel.com> <aCtT9zsGmPiH2S6L@google.com>
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On Mon, 2025-05-19 at 08:53 -0700, Sean Christopherson wrote:
> Yeah, and I'd prefer not to bleed these details into userspace (or into KVM in
> general)
> 

Makes sense. 

> , hence my question about whether or not a "real" VMM hit this.

None that I know of.

References:
- [PATCH 0/2] Introduce RET_PF_RETRY_INVALID_SLOT
  - From: Yan Zhao
- [PATCH 1/2] KVM: x86/mmu: Add RET_PF_RETRY_INVALID_SLOT for fault retry on invalid slot
  - From: Yan Zhao
- Re: [PATCH 1/2] KVM: x86/mmu: Add RET_PF_RETRY_INVALID_SLOT for fault retry on invalid slot
  - From: Sean Christopherson
- Re: [PATCH 1/2] KVM: x86/mmu: Add RET_PF_RETRY_INVALID_SLOT for fault retry on invalid slot
  - From: Reinette Chatre
- Re: [PATCH 1/2] KVM: x86/mmu: Add RET_PF_RETRY_INVALID_SLOT for fault retry on invalid slot
  - From: Edgecombe, Rick P
- Re: [PATCH 1/2] KVM: x86/mmu: Add RET_PF_RETRY_INVALID_SLOT for fault retry on invalid slot
  - From: Sean Christopherson

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