linux-kernel - Re: [PATCH] KVM: SVM: WARN, but continue, if misc_cg_set

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Date:   Tue, 13 Jun 2023 16:22:52 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Alexander Mikhalitsyn <alexander@...alicyn.com>
Subject: Re: [PATCH] KVM: SVM: WARN, but continue, if misc_cg_set_capacity() fails

On Tue, 06 Jun 2023 17:44:49 -0700, Sean Christopherson wrote:
> WARN and continue if misc_cg_set_capacity() fails, as the only scenario
> in which it can fail is if the specified resource is invalid, which should
> never happen when CONFIG_KVM_AMD_SEV=y.  Deliberately not bailing "fixes"
> a theoretical bug where KVM would leak the ASID bitmaps on failure, which
> again can't happen.
> 
> If the impossible should happen, the end result is effectively the same
> with respect to SEV and SEV-ES (they are unusable), while continuing on
> has the advantage of letting KVM load, i.e. userspace can still run
> non-SEV guests.
> 
> [...]

Applied to kvm-x86 svm, thanks!

[1/1] KVM: SVM: WARN, but continue, if misc_cg_set_capacity() fails
      https://github.com/kvm-x86/linux/commit/106ed2cad9f7

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