From: Mingwei Zhang <mizhang@google.com>
To: Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, Mingwei Zhang <mizhang@google.com>,
Kai Huang <kai.huang@intel.com>,
Jim Mattson <jmattson@google.com>,
David Matlack <dmatlack@google.com>,
Ben Gardon <bgardon@google.com>, Xu Yilun <yilun.xu@intel.com>,
Zhi Wang <zhi.wang.linux@gmail.com>
Subject: [PATCH v2 3/6] KVM: Documentation: Add the missing description for ptep in kvm_mmu_page
Date: Mon, 26 Jun 2023 18:20:13 +0000 [thread overview]
Message-ID: <20230626182016.4127366-4-mizhang@google.com> (raw)
In-Reply-To: <20230626182016.4127366-1-mizhang@google.com>
Add the missing description for ptep in kvm_mmu_page description. ptep is
used when TDP MMU is enabled and it shares the storage with parent_ptes.
Update the doc to help readers to get up-to-date info.
Signed-off-by: Mingwei Zhang <mizhang@google.com>
---
Documentation/virt/kvm/x86/mmu.rst | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Documentation/virt/kvm/x86/mmu.rst b/Documentation/virt/kvm/x86/mmu.rst
index 4c9044b4dc6c..5cd6cd5e8926 100644
--- a/Documentation/virt/kvm/x86/mmu.rst
+++ b/Documentation/virt/kvm/x86/mmu.rst
@@ -237,6 +237,11 @@ Shadow pages contain the following information:
parent_ptes points at this single spte, otherwise, there exists multiple
sptes pointing at this page and (parent_ptes & ~0x1) points at a data
structure with a list of parent sptes.
+ ptep:
+ The reverse mapping for the pte pointing at this page's spt. This field is
+ used in replace of parent_ptes when TDP MMU is used. In TDP MMU, each
+ non-root shadow page will have one parent, while each root shadow page has
+ no parent. Note that this field is a union with parent_ptes.
unsync:
If true, then the translations in this page may not match the guest's
translation. This is equivalent to the state of the tlb when a pte is
--
2.41.0.162.gfafddb0af9-goog
next prev parent reply other threads:[~2023-06-26 18:20 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-26 18:20 [PATCH v2 0/6] Update document description for kvm_mmu_page and kvm_mmu_page_role Mingwei Zhang
2023-06-26 18:20 ` [PATCH v2 1/6] KVM: Documentation: Add the missing description for guest_mode in kvm_mmu_page_role Mingwei Zhang
2023-06-26 18:20 ` [PATCH v2 2/6] KVM: Documentation: Update the field name gfns and its description in kvm_mmu_page Mingwei Zhang
2023-06-26 21:49 ` Randy Dunlap
2023-07-31 17:54 ` Mingwei Zhang
2023-07-31 18:24 ` Sean Christopherson
2023-07-31 18:59 ` Mingwei Zhang
2023-06-26 18:20 ` Mingwei Zhang [this message]
2023-06-26 21:44 ` [PATCH v2 3/6] KVM: Documentation: Add the missing description for ptep " Randy Dunlap
2023-06-26 22:20 ` Huang, Kai
2023-06-27 15:27 ` Sean Christopherson
2023-07-31 18:09 ` Mingwei Zhang
2023-06-26 18:20 ` [PATCH v2 4/6] KVM: Documentation: Add the missing description for tdp_mmu_root_count into kvm_mmu_page Mingwei Zhang
2023-06-26 22:21 ` Huang, Kai
2023-06-27 15:50 ` Sean Christopherson
2023-07-31 18:41 ` Mingwei Zhang
2023-06-26 18:20 ` [PATCH v2 5/6] KVM: Documentation: Add the missing description for mmu_valid_gen " Mingwei Zhang
2023-06-27 16:13 ` Sean Christopherson
2023-07-31 22:02 ` Mingwei Zhang
2023-06-26 18:20 ` [PATCH v2 6/6] KVM: Documentation: Add the missing description for tdp_mmu_page " Mingwei Zhang
2023-06-26 22:23 ` Huang, Kai
2023-06-27 16:16 ` Sean Christopherson
2023-07-31 22:28 ` Mingwei Zhang
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