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Message-ID: <20241028192945.2f1433fc@canb.auug.org.au>
Date: Mon, 28 Oct 2024 19:29:45 +1100
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: Sean Christopherson <seanjc@...gle.com>, KVM <kvm@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Linux Next
Mailing List <linux-next@...r.kernel.org>
Subject: linux-next: build warning after merge of the kvm tree
Hi all,
After merging the kvm tree, today's linux-next build (htmldocs) produced
this warning:
Documentation/virt/kvm/locking.rst:157: ERROR: Malformed table.
+-------------------------------------------------------------------------+
| At the beginning:: |
| |
| spte.W = 0 |
| spte.Accessed = 1 |
+-------------------------------------+-----------------------------------+
| CPU 0: | CPU 1: |
+-------------------------------------+-----------------------------------+
| In mmu_spte_update():: | |
| | |
| old_spte = *spte; | |
| | |
| | |
| /* 'if' condition is satisfied. */ | |
| if (old_spte.Accessed == 1 && | |
| old_spte.W == 0) | |
| spte = new_spte; | |
+-------------------------------------+-----------------------------------+
| | on fast page fault path:: |
| | |
| | spte.W = 1 |
| | |
| | memory write on the spte:: |
| | |
| | spte.Dirty = 1 |
+-------------------------------------+-----------------------------------+
| :: | |
| | |
| else | |
| old_spte = xchg(spte, new_spte);| |
| if (old_spte.Accessed && | |
| !new_spte.Accessed) | |
| flush = true; | |
| if (old_spte.Dirty && | |
| !new_spte.Dirty) | |
| flush = true; | |
| OOPS!!! | |
+-------------------------------------+-----------------------------------+
Introduced by commit
5f6a3badbb74 ("KVM: x86/mmu: Mark page/folio accessed only when zapping leaf SPTEs")
--
Cheers,
Stephen Rothwell
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