linux-kernel - Re: [kvm-devel] [PATCH 4/8] X86: export information about NPT to generic x86 code

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Message-ID: <479C4379.8090005@qumranet.com>
Date:	Sun, 27 Jan 2008 10:40:25 +0200
From:	Avi Kivity <avi@...ranet.com>
To:	Joerg Roedel <joerg.roedel@....com>
CC:	kvm-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [kvm-devel] [PATCH 4/8] X86: export information about NPT to
 generic x86 code

Joerg Roedel wrote:
> The generic x86 code has to know if the specific implementation uses Nested
> Paging. In the generic code Nested Paging is called Hardware Assisted Paging
> (HAP) to avoid confusion with (future) HAP implementations of other vendors.
> This patch exports the availability of HAP to the generic x86 code.
>
>  	int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
> +
> +	bool (*hap_enabled)(void);
>  };
>  
>   

Since the value doesn't change during the lifetime of the VM, it can be 
a data field instead of a function.  Or, if we find that npt/ept is 
always a win, a static field in mmu.c.

-- 
error compiling committee.c: too many arguments to function

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