From mboxrd@z Thu Jan  1 00:00:00 1970
From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Subject: Re: [PATCH 5/9] x86/pvh: Set PVH guest's mode in
	XEN_DOMCTL_set_address_size
Date: Tue, 23 Jun 2015 22:53:21 -0400
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To: Jan Beulich <JBeulich@suse.com>
Cc: elena.ufimtseva@oracle.com, tim@xen.org, Kevin Tian <kevin.tian@intel.com>, Keir Fraser <keir@xen.org>, Andrew Cooper <andrew.cooper3@citrix.com>, Eddie Dong <eddie.dong@intel.com>, xen-devel@lists.xen.org, Jun Nakajima <jun.nakajima@intel.com>, roger.pau@citrix.com
List-Id: xen-devel@lists.xenproject.org

On 06/23/2015 09:22 AM, Jan Beulich wrote:
>
>> --- a/xen/arch/x86/hvm/hvm.c
>> +++ b/xen/arch/x86/hvm/hvm.c
>> @@ -2320,12 +2320,7 @@ int hvm_vcpu_initialise(struct vcpu *v)
>>       v->arch.hvm_vcpu.inject_trap.vector = -1;
>>   
>>       if ( is_pvh_domain(d) )
>> -    {
>> -        v->arch.hvm_vcpu.hcall_64bit = 1;    /* PVH 32bitfixme. */
>> -        /* This is for hvm_long_mode_enabled(v). */
>> -        v->arch.hvm_vcpu.guest_efer = EFER_LMA | EFER_LME;
>>           return 0;
>> -    }
> With this removed, is there any guarantee that hvm_set_mode()
> will be called for each vCPU?

IIUIC, toolstack is required to call XEN_DOMCTL_set_address_size which 
results in a call to switch_compat/native(), which loop over all VCPUs, 
calling set_mode.


-boris

>
> Anyway, while I'll apply the previous patch as a cleanup one, I'll
> defer this and later ones until a decision between pursuing PVH
> vs going the "HVMlite" route was made.
>
> Jan
>