From: "H. Peter Anvin" <hpa@zytor.com>
To: Mark McLoughlin <markmc@redhat.com>
Cc: akataria@vmware.com, Ingo Molnar <mingo@elte.hu>,
Andi Kleen <andi@firstfloor.org>,
LKML <linux-kernel@vger.kernel.org>,
the arch/x86 maintainers <x86@kernel.org>,
Daniel Hecht <dhecht@vmware.com>
Subject: Re: [PATCH 2/4] Hypervisor detection and get tsc_freq from hypervisor
Date: Mon, 10 Nov 2008 07:32:06 -0800 [thread overview]
Message-ID: <491853F6.7030803@zytor.com> (raw)
In-Reply-To: <1226320720.4068.54.camel@blaa>
Mark McLoughlin wrote:
>>
>> diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
>> index f73e95d..78478f2 100644
>> --- a/arch/x86/include/asm/cpufeature.h
>> +++ b/arch/x86/include/asm/cpufeature.h
>> @@ -117,6 +117,7 @@
>> #define X86_FEATURE_XSAVE (4*32+26) /* XSAVE/XRSTOR/XSETBV/XGETBV */
>> #define X86_FEATURE_OSXSAVE (4*32+27) /* "" XSAVE enabled in the OS */
>> #define X86_FEATURE_AVX (4*32+28) /* Advanced Vector Extensions */
>> +#define X86_FEATURE_HYPERVISOR (4*32+31) /* Running on a hypervisor */
>
> I don't see you set this anywhere.
>
This bit is set by the hypervisor in the pattern returned by the CPUID
instruction.
-hpa
prev parent reply other threads:[~2008-11-10 15:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-25 0:21 [PATCH 2/4] Hypervisor detection and get tsc_freq from hypervisor Alok Kataria
2008-10-27 11:01 ` Ingo Molnar
2008-10-27 17:41 ` Alok Kataria
2008-11-03 19:31 ` Alok Kataria
2008-11-10 12:38 ` Mark McLoughlin
2008-11-10 15:32 ` H. Peter Anvin [this message]
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