linux-kernel - Re: [PATCH 0/6] KVM: x86: Unhost the *

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Message-ID: <c3705204-8803-8115-5c47-de73bd4523a7@redhat.com>
Date:   Mon, 27 Mar 2023 17:46:30 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>,
        Emanuele Giuseppe Esposito <eesposit@...hat.com>,
        Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
        Jim Mattson <jmattson@...gle.com>
Subject: Re: [PATCH 0/6] KVM: x86: Unhost the *_CMD MSR mess

On 3/27/23 17:28, Sean Christopherson wrote:
>> On 3/22/23 02:14, Sean Christopherson wrote:
>>> Revert the FLUSH_L1D enabling, which has multiple fatal bugs, clean up
>>> the existing PRED_CMD handling, and reintroduce FLUSH_L1D virtualization
>>> without inheriting the mistakes made by PRED_CMD.
>>>
>>> The last patch hardens SVM against one of the bugs introduced in the
>>> FLUSH_L1D enabling.
>>>
>>> I'll post KUT patches tomorrow.  I have the tests written (and they found
>>> bugs in my code, :shocked-pikachu:), just need to write the changelogs.
>>> Wanted to get this out sooner than later as I'm guessing I'm not the only
>>> one whose VMs won't boot on Intel CPUs...
>> Hi Sean,
>>
>> did you post them?
> No, I'll get that done today (I pinky swear this time).

Ok, you can also send me a pull request if you prefer (or I can apply 
the patches to kvm/next myself of course).

Paolo