linux-kernel - Re: [PATCH 1/4] KVM: VMX: rename {vmx,nested_vmx}_vcpu

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Message-ID: <b5e42cff-146d-d802-ce9b-e9b3299b9da9@intel.com>
Date:   Thu, 17 Oct 2019 09:25:56 +0800
From:   Xiaoyao Li <xiaoyao.li@...el.com>
To:     Krish Sadhukhan <krish.sadhukhan@...cle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] KVM: VMX: rename {vmx,nested_vmx}_vcpu_setup
 functions

On 10/17/2019 2:09 AM, Krish Sadhukhan wrote:
> 
> On 10/15/19 6:27 PM, Xiaoyao Li wrote:
>> On 10/16/2019 6:05 AM, Krish Sadhukhan wrote:
>>>
>>>
>>> On 10/15/2019 09:40 AM, Xiaoyao Li wrote:
>>>> Rename {vmx,nested_vmx}_vcpu_setup to {vmx,nested_vmx}_vmcs_setup,
>>>> to match what they really do.
>>>>
>>>> No functional change.
>>>>
>>>> Signed-off-by: Xiaoyao Li <xiaoyao.li@...el.com>
>>>> ---
>>>>   arch/x86/kvm/vmx/nested.c | 2 +-
>>>>   arch/x86/kvm/vmx/nested.h | 2 +-
>>>>   arch/x86/kvm/vmx/vmx.c    | 9 +++------
>>>>   3 files changed, 5 insertions(+), 8 deletions(-)
>>>>
>>>> diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
>>>> index 5e231da00310..7935422d311f 100644
>>>> --- a/arch/x86/kvm/vmx/nested.c
>>>> +++ b/arch/x86/kvm/vmx/nested.c
>>>> @@ -5768,7 +5768,7 @@ static int vmx_set_nested_state(struct 
>>>> kvm_vcpu *vcpu,
>>>>       return ret;
>>>>   }
>>>> -void nested_vmx_vcpu_setup(void)
>>>> +void nested_vmx_vmcs_setup(void)
>>>>   {
>>>>       if (enable_shadow_vmcs) {
>>>>           vmcs_write64(VMREAD_BITMAP, __pa(vmx_vmread_bitmap));
>>>> diff --git a/arch/x86/kvm/vmx/nested.h b/arch/x86/kvm/vmx/nested.h
>>>> index 187d39bf0bf1..2be1ba7482c9 100644
>>>> --- a/arch/x86/kvm/vmx/nested.h
>>>> +++ b/arch/x86/kvm/vmx/nested.h
>>>> @@ -11,7 +11,7 @@ void nested_vmx_setup_ctls_msrs(struct 
>>>> nested_vmx_msrs *msrs, u32 ept_caps,
>>>>                   bool apicv);
>>>>   void nested_vmx_hardware_unsetup(void);
>>>>   __init int nested_vmx_hardware_setup(int (*exit_handlers[])(struct 
>>>> kvm_vcpu *));
>>>> -void nested_vmx_vcpu_setup(void);
>>>> +void nested_vmx_vmcs_setup(void);
>>>>   void nested_vmx_free_vcpu(struct kvm_vcpu *vcpu);
>>>>   int nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu, bool 
>>>> from_vmentry);
>>>>   bool nested_vmx_exit_reflected(struct kvm_vcpu *vcpu, u32 
>>>> exit_reason);
>>>> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
>>>> index e660e28e9ae0..58b77a882426 100644
>>>> --- a/arch/x86/kvm/vmx/vmx.c
>>>> +++ b/arch/x86/kvm/vmx/vmx.c
>>>> @@ -4161,15 +4161,12 @@ static void ept_set_mmio_spte_mask(void)
>>>>   #define VMX_XSS_EXIT_BITMAP 0
>>>> -/*
>>>> - * Sets up the vmcs for emulated real mode.
>>>> - */
>>>> -static void vmx_vcpu_setup(struct vcpu_vmx *vmx)
>>>> +static void vmx_vmcs_setup(struct vcpu_vmx *vmx)
>>>>   {
>>>>       int i;
>>>>       if (nested)
>>>> -        nested_vmx_vcpu_setup();
>>>> +        nested_vmx_vmcs_setup();
>>>>       if (cpu_has_vmx_msr_bitmap())
>>>>           vmcs_write64(MSR_BITMAP, __pa(vmx->vmcs01.msr_bitmap));
>>>> @@ -6777,7 +6774,7 @@ static struct kvm_vcpu *vmx_create_vcpu(struct 
>>>> kvm *kvm, unsigned int id)
>>>>       cpu = get_cpu();
>>>>       vmx_vcpu_load(&vmx->vcpu, cpu);
>>>>       vmx->vcpu.cpu = cpu;
>>>> -    vmx_vcpu_setup(vmx);
>>>> +    vmx_vmcs_setup(vmx);
>>>>       vmx_vcpu_put(&vmx->vcpu);
>>>>       put_cpu();
>>>>       if (cpu_need_virtualize_apic_accesses(&vmx->vcpu)) {
>>>
>>> May be we should rename vmx_vcpu_reset() to vmx_vmcs_reset()  as well  ?
>>
>> Not really. vmx_vcpu_reset() not only resets vmcs but also the 
>> emulated field of vmx vcpu.
> 
> It would be a better organization of the code if the resetting of the 
> VMCS fields were placed in a separate function.
> 

OK, will do it in next version.

> Reviewed-by: Krish Sadhukhan <krish.sadhukhan@...cle.com>
>