From: Bagas Sanjaya <bagasdotme@gmail.com>
To: linux-doc@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Jonathan Corbet <corbet@lwn.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Isaku Yamahata <isaku.yamahata@intel.com>,
Kai Huang <kai.huang@intel.com>,
x86@kernel.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org,
Bagas Sanjaya <bagasdotme@gmail.com>
Subject: [PATCH 09/12] Documentation: kvm: tdx-tdp-mmu: Add blank line padding to lists in concurrent sections
Date: Sat, 9 Jul 2022 11:20:35 +0700 [thread overview]
Message-ID: <20220709042037.21903-10-bagasdotme@gmail.com> (raw)
In-Reply-To: <20220709042037.21903-1-bagasdotme@gmail.com>
The last warnings on tdx-tdp-mmu.rst are caused by missing blank line
padding at lists on "concurrent" sections. Add the padding.
Fixes: 7af4efe3263854 ("KVM: x86: design documentation on TDX support of x86 KVM TDP MMU")
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
---
Documentation/virt/kvm/tdx-tdp-mmu.rst | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/Documentation/virt/kvm/tdx-tdp-mmu.rst b/Documentation/virt/kvm/tdx-tdp-mmu.rst
index c403e14fb223aa..f2170c154e18c3 100644
--- a/Documentation/virt/kvm/tdx-tdp-mmu.rst
+++ b/Documentation/virt/kvm/tdx-tdp-mmu.rst
@@ -418,8 +418,10 @@ Concurrent zapping
2. freeze the EPT entry (atomically set the value to REMOVED_SPTE)
If other vcpu froze the entry, restart page fault.
3. TLB shootdown
+
* send IPI to remote vcpus
* TLB flush (local and remote)
+
For each entry update, TLB shootdown is needed because of the
concurrency.
4. atomically set the EPT entry to the final value
@@ -429,6 +431,7 @@ Concurrent populating
---------------------
In the case of populating the non-present EPT entry, atomically update the EPT
entry.
+
1. read lock
2. atomically update the EPT entry
If other vcpu frozen the entry or updated the entry, restart page fault.
@@ -436,6 +439,7 @@ entry.
In the case of updating the present EPT entry (e.g. page migration), the
operation is split into two. Zapping the entry and populating the entry.
+
1. read lock
2. zap the EPT entry. follow the concurrent zapping case.
3. populate the non-present EPT entry.
@@ -451,7 +455,6 @@ In this case, the TLB shootdown is batched into one.
3. TLB shootdown
4. write unlock
-
For Secure EPT, TDX SEAMCALLs are needed in addition to updating the mirrored
EPT entry.
@@ -462,9 +465,11 @@ Add a hook for TDX SEAMCALLs at the step of the TLB shootdown.
1. read lock
2. freeze the EPT entry(set the value to REMOVED_SPTE)
3. TLB shootdown via a hook
+
* TLB.MEM.RANGE.BLOCK()
* TLB.MEM.TRACK()
* send IPI to remote vcpus
+
4. set the EPT entry to the final value
5. read unlock
@@ -477,7 +482,9 @@ condition. A hook can be added.
1. read lock
2. freeze the EPT entry
3. hook
+
* TDH_MEM_SEPT_ADD() for non-leaf or TDH_MEM_PAGE_AUG() for leaf.
+
4. set the EPT entry to the final value
5. read unlock
--
An old man doll... just what I always wanted! - Clara
next prev parent reply other threads:[~2022-07-09 4:21 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-09 4:20 [PATCH 00/12] Documentation: tdx: documentation fixes Bagas Sanjaya
2022-07-09 4:20 ` [PATCH 01/12] Documentation: kvm: Pad bullet lists with blank line Bagas Sanjaya
2022-07-09 4:20 ` [PATCH 02/12] Documentation: kvm: tdx: Use appropriate subbullet marker Bagas Sanjaya
2022-07-09 4:20 ` [PATCH 03/12] Documentation: kvm: tdx: Add footnote markers Bagas Sanjaya
2022-07-09 4:20 ` [PATCH 04/12] Documentation: kvm: tdx: Use bullet list for public kvm trees Bagas Sanjaya
2022-07-09 4:20 ` [PATCH 05/12] Documentation: kvm: tdx: title typofix Bagas Sanjaya
2022-07-09 4:20 ` [PATCH 06/12] Documentation: kvm: tdx-tdp-mmu: Add blank line padding for lists Bagas Sanjaya
2022-07-09 4:20 ` [PATCH 07/12] Documentation: kvm: tdx-tdp-mmu: Use literal code block for EPT violation diagrams Bagas Sanjaya
2022-07-09 4:20 ` [PATCH 08/12] Documentation: kvm: tdx-tdp-mmu: Properly format nested list for EPT state machine Bagas Sanjaya
2022-07-09 4:26 ` Bagas Sanjaya
2022-07-12 19:34 ` Isaku Yamahata
2022-07-09 4:20 ` Bagas Sanjaya [this message]
2022-07-09 4:20 ` [PATCH 10/12] Documentation: x86: Enclose TDX initialization code inside code block Bagas Sanjaya
2022-07-12 4:12 ` Kai Huang
2022-07-09 4:20 ` [PATCH 11/12] Documentation: x86: Use literal code block for TDX dmesg output Bagas Sanjaya
2022-07-12 4:11 ` Kai Huang
2022-07-09 4:20 ` [PATCH 12/12] Documentation: kvm: Add TDX documentation to KVM table of contents Bagas Sanjaya
2022-07-12 19:35 ` [PATCH 00/12] Documentation: tdx: documentation fixes Isaku Yamahata
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