linux-kernel - Re: [PATCH v5 4/7] kvm, mem-hotplug: Reload L1' apic access page on migration in vcpu_enter

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Date:	Thu, 11 Sep 2014 12:39:15 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	tangchen <tangchen@...fujitsu.com>, gleb@...nel.org,
	mtosatti@...hat.com, nadav.amit@...il.com, jan.kiszka@....de
CC:	kvm@...r.kernel.org, laijs@...fujitsu.com,
	isimatu.yasuaki@...fujitsu.com, guz.fnst@...fujitsu.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 4/7] kvm, mem-hotplug: Reload L1' apic access page
 on migration in vcpu_enter_guest().

Il 11/09/2014 12:20, tangchen ha scritto:
>>>
>>> +    vmcs_write64(APIC_ACCESS_ADDR, hpa);
>> This has to be guarded by "if (!is_guest_mode(vcpu))".
> 
> Since we cannot get vcpu through kvm, I'd like to move this check to
> vcpu_reload_apic_access_page() when
> kvm_x86_ops->set_apic_access_page_addr()
> is called.

Good idea!  Though passing the vcpu to vmx_set_apic_access_page_addr
would also work.

Paolo
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