linux-kernel - Re: [PATCH 0/8] KVM: gmem: Adding hooks for SEV and TDX

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <169239820500.1761806.6161030396328593760.b4-ty@google.com>
Date:   Fri, 18 Aug 2023 16:14:18 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, isaku.yamahata@...el.com
Cc:     isaku.yamahata@...il.com, Michael Roth <michael.roth@....com>,
        Paolo Bonzini <pbonzini@...hat.com>, erdemaktas@...gle.com,
        Sagi Shahar <sagis@...gle.com>,
        David Matlack <dmatlack@...gle.com>,
        Kai Huang <kai.huang@...el.com>,
        Zhi Wang <zhi.wang.linux@...il.com>, chen.bo@...el.com,
        linux-coco@...ts.linux.dev,
        Chao Peng <chao.p.peng@...ux.intel.com>,
        Ackerley Tng <ackerleytng@...gle.com>,
        Vishal Annapurve <vannapurve@...gle.com>,
        Yuan Yao <yuan.yao@...ux.intel.com>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Xu Yilun <yilun.xu@...el.com>,
        Quentin Perret <qperret@...gle.com>, wei.w.wang@...el.com,
        Fuad Tabba <tabba@...gle.com>
Subject: Re: [PATCH 0/8] KVM: gmem: Adding hooks for SEV and TDX

On Tue, 15 Aug 2023 10:18:47 -0700, isaku.yamahata@...el.com wrote:
> From: Isaku Yamahata <isaku.yamahata@...el.com>
> 
> This patch series for KVM guest memfd is to have common code base for SEV and
> TDX.  Several minor fixes.  Based on this patch series, TDX KVM can defer page
> clearing without mmu lock.
> 
> Isaku Yamahata (6):
>   KVM: gmem: Make kvm_gmem_bind return EBADF on wrong fd
>   KVM: gmem: removed duplicated kvm_gmem_init()
>   KVM: gmem: Fix kvm_gmem_issue_arch_invalidate()
>   KVM: gmem: protect kvm_mmu_invalidate_end()
>   KVM: gmem: Avoid race with kvm_gmem_release and mmu notifier
>   RFC: KVM: gmem: Guarantee the order of destruction
> 
> [...]

Applied patches 1 and 2 to kvm-x86 guest_memfd.  I'll post the alternative
approach for fixing the unlocking bug next week (need to test, and I'm out of
time this week).

Regarding the initialize/invalidate hooks, I resurrected the discussion from
the previous version[*], I'd like to bottom out on a solution in that thread
before applying anything.

[*] https://lore.kernel.org/all/ZN%2FwY53TF2aOZtLu@google.com

[1/8] KVM: gmem: Make kvm_gmem_bind return EBADF on wrong fd
      https://github.com/kvm-x86/linux/commit/07ac04fbefce
[2/8] KVM: gmem: removed duplicated kvm_gmem_init()
      https://github.com/kvm-x86/linux/commit/9ab46d91d5ea

--
https://github.com/kvm-x86/linux/tree/next
https://github.com/kvm-x86/linux/tree/fixes