linux-kernel - Re: [PATCH 7/7] kvm x86: report 1GB page support to userspace

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Message-ID: <20090329125447.GJ31080@8bytes.org>
Date:	Sun, 29 Mar 2009 14:54:47 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	Avi Kivity <avi@...hat.com>
Cc:	Joerg Roedel <joerg.roedel@....com>,
	Marcelo Tosatti <mtosatti@...hat.com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/7] kvm x86: report 1GB page support to userspace

On Sun, Mar 29, 2009 at 03:49:11PM +0300, Avi Kivity wrote:
> Joerg Roedel wrote:
>>>>  	int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
>>>>  	int (*get_tdp_level)(void);
>>>>  	int (*get_mt_mask_shift)(void);
>>>> +
>>>> +	bool (*gb_page_enable)(void);
>>>>  };
>>>>         
>>> Should enable unconditionally.  Of course we need to find the shadow 
>>> bug  first, may be the has_wrprotected thingy.
>>>     
>>
>> This was the original plan. But how about VMX with EPT enabled? I am not
>> sure but I think this configuration will not support gbpages?
>>
>> 	
>
> You're right.  Let's have a ->max_host_page_level() to handle that.   
> It's 0.5T pages ready, too.

Ok I will change that together with the page_size -> page_level
chhanges. But I doubt that there will ever be 0.5T pages ;)

	Joerg
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