Re: [RFC PATCH v5 053/104] KVM: x86/mmu: steal software usable bit for EPT to represent shared page

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Subject: Re: [RFC PATCH v5 053/104] KVM: x86/mmu: steal software usable bit for EPT to represent shared page
From: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Date: Fri, 15 Apr 2022 17:21:03 +0200
Cc: isaku.yamahata@xxxxxxxxx, Jim Mattson <jmattson@xxxxxxxxxx>, erdemaktas@xxxxxxxxxx, Connor Kuehl <ckuehl@xxxxxxxxxx>, Sean Christopherson <seanjc@xxxxxxxxxx>
In-reply-to: <028675e255cb2a23186ebc7a94c06a47375c6883.1646422845.git.isaku.yamahata@intel.com>
References: <cover.1646422845.git.isaku.yamahata@intel.com> <028675e255cb2a23186ebc7a94c06a47375c6883.1646422845.git.isaku.yamahata@intel.com>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0

On 3/4/22 20:49, isaku.yamahata@xxxxxxxxx wrote:

+/* Masks that used to track for shared GPA **/
+#define SPTE_PRIVATE_PROHIBIT	BIT_ULL(62)
+

Please rename this to SPTE_SHARED_MAPPING_MASK, or even justSPTE_SHARED_MASK.


Paolo

References:
- [RFC PATCH v5 000/104] KVM TDX basic feature support
  - From: isaku . yamahata
- [RFC PATCH v5 053/104] KVM: x86/mmu: steal software usable bit for EPT to represent shared page
  - From: isaku . yamahata

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