From: Ben Gardon <bgardon@google.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Peter Shier <pshier@google.com>,
Jim Mattson <jmattson@google.com>,
Ben Gardon <bgardon@google.com>
Subject: [PATCH 0/4] Fix RCU warnings in TDP MMU
Date: Thu, 11 Mar 2021 15:16:54 -0800 [thread overview]
Message-ID: <20210311231658.1243953-1-bgardon@google.com> (raw)
The Linux Test Robot found a few RCU warnings in the TDP MMU:
https://www.spinics.net/lists/kernel/msg3845500.html
https://www.spinics.net/lists/kernel/msg3845521.html
Fix these warnings and cleanup a hack in tdp_mmu_iter_cond_resched.
Tested by compiling as suggested in the test robot report and confirmed that
the warnings go away with this series applied. Also ran kvm-unit-tests on an
Intel Skylake machine with the TDP MMU enabled and confirmed that the series
introduced no new failures.
Ben Gardon (4):
KVM: x86/mmu: Fix RCU usage in handle_removed_tdp_mmu_page
KVM: x86/mmu: Fix RCU usage for tdp_iter_root_pt
KVM: x86/mmu: Fix RCU usage when atomically zapping SPTEs
KVM: x86/mmu: Factor out tdp_iter_return_to_root
arch/x86/kvm/mmu/tdp_iter.c | 34 +++++++++++++++++++++++++---------
arch/x86/kvm/mmu/tdp_iter.h | 3 ++-
arch/x86/kvm/mmu/tdp_mmu.c | 19 +++++++++++--------
3 files changed, 38 insertions(+), 18 deletions(-)
--
2.31.0.rc2.261.g7f71774620-goog
next reply other threads:[~2021-03-11 23:18 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-11 23:16 Ben Gardon [this message]
2021-03-11 23:16 ` [PATCH 1/4] KVM: x86/mmu: Fix RCU usage in handle_removed_tdp_mmu_page Ben Gardon
2021-03-12 15:37 ` Sean Christopherson
2021-03-12 15:43 ` Paolo Bonzini
2021-03-15 17:08 ` Ben Gardon
2021-03-11 23:16 ` [PATCH 2/4] KVM: x86/mmu: Fix RCU usage for tdp_iter_root_pt Ben Gardon
2021-03-12 16:22 ` Sean Christopherson
2021-03-15 17:13 ` Ben Gardon
2021-03-11 23:16 ` [PATCH 3/4] KVM: x86/mmu: Fix RCU usage when atomically zapping SPTEs Ben Gardon
2021-03-12 16:24 ` Sean Christopherson
2021-03-11 23:16 ` [PATCH 4/4] KVM: x86/mmu: Factor out tdp_iter_return_to_root Ben Gardon
2021-03-12 16:35 ` Sean Christopherson
2021-03-12 17:00 ` Paolo Bonzini
2021-03-12 17:01 ` [PATCH 0/4] Fix RCU warnings in TDP MMU Paolo Bonzini
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