linux-kernel - Re: [PATCH v3 0/4] Fix RCU warnings in TDP MMU

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <1b03ae88-2b5c-5806-1cac-0e44a2395d0c@redhat.com>
Date:   Tue, 16 Mar 2021 19:16:46 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Ben Gardon <bgardon@...gle.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Peter Shier <pshier@...gle.com>,
        Jim Mattson <jmattson@...gle.com>
Subject: Re: [PATCH v3 0/4] Fix RCU warnings in TDP MMU

On 16/03/21 00:37, Ben Gardon wrote:
> 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 (3):
>    KVM: x86/mmu: Fix RCU usage in handle_removed_tdp_mmu_page
>    KVM: x86/mmu: Fix RCU usage when atomically zapping SPTEs
>    KVM: x86/mmu: Factor out tdp_iter_return_to_root
> 
> Sean Christopherson (1):
>    KVM: x86/mmu: Store the address space ID in the TDP iterator
> 
>   arch/x86/kvm/mmu/mmu_internal.h |  5 +++++
>   arch/x86/kvm/mmu/tdp_iter.c     | 30 +++++++++++++++----------
>   arch/x86/kvm/mmu/tdp_iter.h     |  4 +++-
>   arch/x86/kvm/mmu/tdp_mmu.c      | 40 +++++++++++++--------------------
>   4 files changed, 41 insertions(+), 38 deletions(-)
> 

Queued, thanks.

Paolo