From: Paolo Bonzini <pbonzini@redhat.com>
To: Sean Christopherson <seanjc@google.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Chenyi Qiang <chenyi.qiang@intel.com>,
Lei Wang <lei4.wang@intel.com>
Subject: Re: [PATCH 2/2] KVM: VMX: Add knob to allow rejecting kvm_intel on inconsistent VMCS config
Date: Thu, 26 May 2022 12:39:51 +0200 [thread overview]
Message-ID: <8288b833-68f0-9fd2-d4d4-21cc9aff5ec2@redhat.com> (raw)
In-Reply-To: <20220525210447.2758436-3-seanjc@google.com>
On 5/25/22 23:04, Sean Christopherson wrote:
> Add an off-by-default module param, reject_inconsistent_vmcs_config, to
> allow rejecting the load of kvm_intel if an inconsistent VMCS config is
> detected. Continuing on with an inconsistent, degraded config is
> undesirable when the CPU is expected to support a given set of features,
> e.g. can result in a misconfigured VM if userspace doesn't cross-check
> KVM_GET_SUPPORTED_CPUID, and/or can result in poor performance due to
> lack of fast MSR switching.
>
> Signed-off-by: Sean Christopherson<seanjc@google.com>
> ---
> arch/x86/kvm/vmx/vmx.c | 20 +++++++++++++++++---
> 1 file changed, 17 insertions(+), 3 deletions(-)
Yeah let's do this by default.
Paolo
prev parent reply other threads:[~2022-05-26 10:40 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-25 21:04 [PATCH 0/2] KVM: VMX: Sanitize VM-Entry/VM-Exit pairs during setup Sean Christopherson
2022-05-25 21:04 ` [PATCH 1/2] KVM: VMX: Sanitize VM-Entry/VM-Exit control pairs at kvm_intel load time Sean Christopherson
2022-05-25 23:27 ` Yuan Yao
2022-05-26 0:42 ` Sean Christopherson
2022-05-26 1:04 ` Yuan Yao
2022-05-26 10:39 ` Paolo Bonzini
2022-05-26 21:35 ` Sean Christopherson
2022-05-27 9:44 ` Paolo Bonzini
2022-05-25 21:04 ` [PATCH 2/2] KVM: VMX: Add knob to allow rejecting kvm_intel on inconsistent VMCS config Sean Christopherson
2022-05-25 21:17 ` Jim Mattson
2022-05-26 0:45 ` Sean Christopherson
2022-05-26 1:00 ` Jim Mattson
2022-05-26 10:39 ` Paolo Bonzini [this message]
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