From: Wei Liu <wei.liu2@citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: xen-devel <xen-devel@lists.xenproject.org>,
Wei Liu <wei.liu2@citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [PATCH] x86: correct remaining extended CPUID level checks
Date: Mon, 9 May 2016 14:34:05 +0100 [thread overview]
Message-ID: <20160509133405.GM12241@citrix.com> (raw)
In-Reply-To: <5730AA9C02000078000E98CF@prv-mh.provo.novell.com>
On Mon, May 09, 2016 at 07:19:56AM -0600, Jan Beulich wrote:
> We should consistently check the upper 16 bits to be equal 0x8000 and
> only then the full value to be >= the desired level.
>
> Signed-off-by: Jan Beulich <jbeulich@suse.com>
> ---
> As to inclusion in 4.7 - I think this would be desirable, but it's not
> a must: I'm unaware of real world environments where
> CPUID[0x80000000].EAX would yield a value not having the upper 16 bits
> set to 0x8000.
>
We're early in our RC so:
Release-acked-by: Wei Liu <wei.liu2@citrix.com>
Wei.
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prev parent reply other threads:[~2016-05-09 13:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-09 13:19 [PATCH] x86: correct remaining extended CPUID level checks Jan Beulich
2016-05-09 13:25 ` Andrew Cooper
2016-05-09 13:34 ` Wei Liu [this message]
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