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From: Lai Jiangshan <jiangshanlai@gmail.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>,
	LKML <linux-kernel@vger.kernel.org>,
	kvm@vger.kernel.org, Lai Jiangshan <jiangshan.ljs@antgroup.com>,
	Jonathan Corbet <corbet@lwn.net>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	X86 ML <x86@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
	linux-doc@vger.kernel.org
Subject: Re: [RFC PATCH V3 3/4] KVM: X86: Alloc role.pae_root shadow page
Date: Thu, 14 Apr 2022 21:35:45 +0800	[thread overview]
Message-ID: <CAJhGHyCO23JbqdiwRvdggSSxxe93vyKPNY6H5nk+=y6cJJaxvQ@mail.gmail.com> (raw)
In-Reply-To: <CAJhGHyCgo-FEgvuRfuLZikgJSyo7HGm1OfU3gme35-WBmqo7yQ@mail.gmail.com>

On Thu, Apr 14, 2022 at 5:32 PM Lai Jiangshan <jiangshanlai@gmail.com> wrote:

>
> All new kinds of sp added in this patchset are in the hash too.
>


I think role.guest_pae_root is needed to distinguish it from
a sp for a level-3 guest page in a 4-level pagetable.

Or just role.guest_root_level(or role.root_level) and it can replace
role.passthrough_depth and role.guest_pae_root and role.pae_root.

role.pae_root will be

(role.root_level == 3 || role.root_level == 2) && role.level == 3 &&
(host is 32bit || !tdp_enabled)

  parent reply	other threads:[~2022-04-14 14:30 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-30 13:21 [RFC PATCH V3 0/4] KVM: X86: Add and use shadow page with level expanded or acting as pae_root Lai Jiangshan
2022-03-30 13:21 ` [RFC PATCH V3 1/4] KVM: X86: Add arguement gfn and role to kvm_mmu_alloc_page() Lai Jiangshan
2022-03-30 13:21 ` [RFC PATCH V3 2/4] KVM: X86: Introduce role.glevel for level expanded pagetable Lai Jiangshan
2022-03-30 16:01   ` Lai Jiangshan
2022-04-12 21:31   ` Sean Christopherson
2022-04-13  4:13     ` Lai Jiangshan
2022-04-13  8:38     ` Paolo Bonzini
2022-04-13 14:42       ` Sean Christopherson
2022-04-13 14:46         ` Paolo Bonzini
2022-04-13 15:32           ` Sean Christopherson
2022-04-13 16:03             ` Paolo Bonzini
2022-04-14 15:51               ` Sean Christopherson
2022-04-14 16:32                 ` Lai Jiangshan
2022-03-30 13:21 ` [RFC PATCH V3 3/4] KVM: X86: Alloc role.pae_root shadow page Lai Jiangshan
2022-04-12 21:14   ` Sean Christopherson
2022-04-14  9:07     ` Lai Jiangshan
2022-04-14  9:08       ` Paolo Bonzini
2022-04-14  9:32         ` Lai Jiangshan
2022-04-14 10:04           ` Paolo Bonzini
2022-04-14 11:06             ` Lai Jiangshan
2022-04-14 14:12               ` Paolo Bonzini
2022-04-14 14:42                 ` Sean Christopherson
2022-04-14 13:35           ` Lai Jiangshan [this message]
2022-04-14 14:52       ` Sean Christopherson
2022-03-30 13:21 ` [RFC PATCH V3 4/4] KVM: X86: Use passthrough and pae_root shadow page for 32bit guests Lai Jiangshan
2022-04-12 21:34   ` Sean Christopherson
2022-04-12  9:35 ` [RFC PATCH V3 0/4] KVM: X86: Add and use shadow page with level expanded or acting as pae_root Lai Jiangshan

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