linux-kernel - Re: [PATCH] kvm: update eax documentation in signature cpuid

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Message-Id: <20120501222421.d35390564b5fd4d7fbcba76f@gmail.com>
Date:	Tue, 1 May 2012 22:24:21 +0900
From:	Takuya Yoshikawa <takuya.yoshikawa@...il.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org, davej@...hat.com
Subject: Re: [PATCH] kvm: update eax documentation in signature cpuid

On Tue, 1 May 2012 16:06:11 +0300
"Michael S. Tsirkin" <mst@...hat.com> wrote:

>  Note that this value in ebx, ecx and edx corresponds to the string "KVMKVMKVM".
> +The value in eax corresponds to the maximim cpuid function present in this leaf,

maximum?

	Takuya

> +and will be updated if more functions are added in the future.
> +Note also that old hosts set eax value to 0x0. This should
> +be interpreted as if the value was 0x40000001.
>  This function queries the presence of KVM cpuid leafs.
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