From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Paolo Bonzini <pbonzini@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,
Xiaoyao Li <xiaoyao.li@intel.com>
Subject: Re: [PATCH 04/10] KVM: VMX: Convert local exit_reason to u16 in nested_vmx_exit_reflected()
Date: Fri, 13 Mar 2020 13:47:01 +0100 [thread overview]
Message-ID: <87a74kpgl6.fsf@vitty.brq.redhat.com> (raw)
In-Reply-To: <20200312184521.24579-5-sean.j.christopherson@intel.com>
Sean Christopherson <sean.j.christopherson@intel.com> writes:
> Store only the basic exit reason in the local "exit_reason" variable in
> nested_vmx_exit_reflected(). Except for tracing, all references to
> exit_reason are expecting to encounter only the basic exit reason.
>
> Opportunistically align the params to nested_vmx_exit_handled_msr().
>
> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
> ---
> arch/x86/kvm/vmx/nested.c | 8 +++++---
> 1 file changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
> index cb05bcbbfc4e..1848ca0116c0 100644
> --- a/arch/x86/kvm/vmx/nested.c
> +++ b/arch/x86/kvm/vmx/nested.c
> @@ -5374,7 +5374,7 @@ static bool nested_vmx_exit_handled_io(struct kvm_vcpu *vcpu,
> * MSR bitmap. This may be the case even when L0 doesn't use MSR bitmaps.
> */
> static bool nested_vmx_exit_handled_msr(struct kvm_vcpu *vcpu,
> - struct vmcs12 *vmcs12, u32 exit_reason)
> + struct vmcs12 *vmcs12, u16 exit_reason)
> {
> u32 msr_index = kvm_rcx_read(vcpu);
> gpa_t bitmap;
> @@ -5523,7 +5523,7 @@ bool nested_vmx_exit_reflected(struct kvm_vcpu *vcpu)
> u32 intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
> struct vcpu_vmx *vmx = to_vmx(vcpu);
> struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
> - u32 exit_reason = vmx->exit_reason;
> + u16 exit_reason;
>
> if (vmx->nested.nested_run_pending)
> return false;
> @@ -5548,13 +5548,15 @@ bool nested_vmx_exit_reflected(struct kvm_vcpu *vcpu)
> */
> nested_mark_vmcs12_pages_dirty(vcpu);
>
> - trace_kvm_nested_vmexit(kvm_rip_read(vcpu), exit_reason,
> + trace_kvm_nested_vmexit(kvm_rip_read(vcpu), vmx->exit_reason,
> vmcs_readl(EXIT_QUALIFICATION),
> vmx->idt_vectoring_info,
> intr_info,
> vmcs_read32(VM_EXIT_INTR_ERROR_CODE),
> KVM_ISA_VMX);
>
> + exit_reason = vmx->exit_reason;
> +
> switch (exit_reason) {
> case EXIT_REASON_EXCEPTION_NMI:
> if (is_nmi(intr_info))
If the patch is looked at by itself (and not as part of the series) one
may ask to add a comment explaining that we do the trunctation
deliberately but with all patches of the series it is superfluous.
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
--
Vitaly
next prev parent reply other threads:[~2020-03-13 12:47 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-12 18:45 [PATCH 00/10] KVM: VMX: Unionize vcpu_vmx.exit_reason Sean Christopherson
2020-03-12 18:45 ` [PATCH 01/10] KVM: nVMX: Move reflection check into nested_vmx_reflect_vmexit() Sean Christopherson
2020-03-13 12:12 ` Vitaly Kuznetsov
2020-03-17 5:33 ` Sean Christopherson
2020-03-17 16:16 ` Sean Christopherson
2020-03-17 17:00 ` Vitaly Kuznetsov
2020-03-17 17:38 ` Paolo Bonzini
2020-03-17 18:01 ` Sean Christopherson
2020-03-12 18:45 ` [PATCH 02/10] KVM: nVMX: Drop a superfluous WARN on reflecting EXTERNAL_INTERRUPT Sean Christopherson
2020-03-13 12:14 ` Vitaly Kuznetsov
2020-03-12 18:45 ` [PATCH 03/10] KVM: nVMX: Pull exit_reason from vcpu_vmx in nested_vmx_exit_reflected() Sean Christopherson
2020-03-13 12:38 ` Vitaly Kuznetsov
2020-03-12 18:45 ` [PATCH 04/10] KVM: VMX: Convert local exit_reason to u16 " Sean Christopherson
2020-03-13 12:47 ` Vitaly Kuznetsov [this message]
2020-03-12 18:45 ` [PATCH 05/10] KVM: VMX: Convert local exit_reason to u16 in vmx_handle_exit() Sean Christopherson
2020-03-13 13:48 ` Vitaly Kuznetsov
2020-03-12 18:45 ` [PATCH 06/10] KVM: nVMX: Convert local exit_reason to u16 in ...enter_non_root_mode() Sean Christopherson
2020-03-13 13:55 ` Vitaly Kuznetsov
2020-03-13 14:00 ` David Laight
2020-03-17 5:29 ` Sean Christopherson
2020-03-17 17:40 ` Paolo Bonzini
2020-03-12 18:45 ` [PATCH 07/10] KVM: nVMX: Cast exit_reason to u16 to check for nested EXTERNAL_INTERRUPT Sean Christopherson
2020-03-13 13:56 ` Vitaly Kuznetsov
2020-03-12 18:45 ` [PATCH 08/10] KVM: nVMX: Rename exit_reason to vm_exit_reason for nested VM-Exit Sean Christopherson
2020-03-13 14:01 ` Vitaly Kuznetsov
2020-03-13 16:17 ` Sean Christopherson
2020-03-12 18:45 ` [PATCH 09/10] KVM: VMX: Cache vmx->exit_reason in local u16 in vmx_handle_exit_irqoff() Sean Christopherson
2020-03-13 14:09 ` Vitaly Kuznetsov
2020-03-17 17:50 ` Paolo Bonzini
2020-03-12 18:45 ` [PATCH 10/10] KVM: VMX: Convert vcpu_vmx.exit_reason to a union Sean Christopherson
2020-03-13 14:18 ` Vitaly Kuznetsov
2020-03-17 5:28 ` Sean Christopherson
2020-03-17 17:51 ` Paolo Bonzini
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