From: Sean Christopherson <seanjc@google.com>
To: Maxim Levitsky <mlevitsk@redhat.com>
Cc: kvm@vger.kernel.org, Jim Mattson <jmattson@google.com>,
"H. Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Joerg Roedel <joro@8bytes.org>,
Thomas Gleixner <tglx@linutronix.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
Wanpeng Li <wanpengli@tencent.com>,
Borislav Petkov <bp@alien8.de>,
x86@kernel.org
Subject: Re: [PATCH 1/4] KVM: x86: mark synthetic SMM vmexit as SVM_EXIT_SW
Date: Tue, 1 Mar 2022 16:31:10 +0000 [thread overview]
Message-ID: <Yh5KTtLhRyfmx/ZF@google.com> (raw)
In-Reply-To: <20220301135526.136554-2-mlevitsk@redhat.com>
On Tue, Mar 01, 2022, Maxim Levitsky wrote:
> Use a dummy unused vmexit reason to mark the 'VM exit' that is happening
> when kvm exits to handle SMM, which is not a real VM exit.
Why not use "62h VMEXIT_SMI"?
> This makes it a bit easier to read the KVM trace, and avoids
> other potential problems.
What other potential problems?
> Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
> ---
> arch/x86/kvm/svm/svm.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
> index 7038c76fa8410..c08fd7f4f3414 100644
> --- a/arch/x86/kvm/svm/svm.c
> +++ b/arch/x86/kvm/svm/svm.c
> @@ -4218,7 +4218,7 @@ static int svm_enter_smm(struct kvm_vcpu *vcpu, char *smstate)
> svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
> svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP];
>
> - ret = nested_svm_vmexit(svm);
> + ret = nested_svm_simple_vmexit(svm, SVM_EXIT_SW);
> if (ret)
> return ret;
>
> --
> 2.26.3
>
next prev parent reply other threads:[~2022-03-01 16:31 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-01 13:55 [PATCH 0/4] SVM fixes + apic fix Maxim Levitsky
2022-03-01 13:55 ` [PATCH 1/4] KVM: x86: mark synthetic SMM vmexit as SVM_EXIT_SW Maxim Levitsky
2022-03-01 16:31 ` Sean Christopherson [this message]
2022-03-01 17:13 ` Maxim Levitsky
2022-03-09 15:46 ` Paolo Bonzini
2022-03-01 13:55 ` [PATCH 2/4] KVM: x86: SVM: disable preemption in avic_refresh_apicv_exec_ctrl Maxim Levitsky
2022-03-01 17:15 ` Sean Christopherson
2022-03-01 17:20 ` Maxim Levitsky
2022-03-01 17:23 ` Paolo Bonzini
2022-03-01 13:55 ` [PATCH 3/4] KVM: x86: SVM: use vmcb01 in avic_init_vmcb Maxim Levitsky
2022-03-01 16:21 ` Sean Christopherson
2022-03-01 17:25 ` Maxim Levitsky
2022-03-01 17:35 ` Sean Christopherson
2022-03-09 15:48 ` Paolo Bonzini
2022-03-15 12:27 ` Maxim Levitsky
2022-03-01 13:55 ` [PATCH 4/4] KVM: x86: lapic: don't allow to set non default apic id when not using x2apic api Maxim Levitsky
2022-03-01 16:56 ` Sean Christopherson
2022-03-01 17:09 ` Maxim Levitsky
2022-03-01 17:46 ` Sean Christopherson
2022-03-01 17:56 ` Maxim Levitsky
2022-03-02 11:50 ` Maxim Levitsky
2022-03-03 16:51 ` Sean Christopherson
2022-03-03 18:15 ` Maxim Levitsky
2022-03-03 19:38 ` Sean Christopherson
2022-03-03 19:49 ` Sean Christopherson
2022-03-04 10:54 ` Maxim Levitsky
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