linux-kernel - Re: [PATCH] x86: Print AMD virtualization features in /proc/cpuinfo

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Message-ID: <20100205125059.GA16236@amd.com>
Date:	Fri, 5 Feb 2010 13:51:00 +0100
From:	Joerg Roedel <joerg.roedel@....com>
To:	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
CC:	x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: Print AMD virtualization features in /proc/cpuinfo

Are there any problems with this patch or was it just forgotten :-)
Please let me know.

	Joerg

On Mon, Dec 14, 2009 at 01:08:41PM +0100, Joerg Roedel wrote:
> This patch adds code to cpu initialization path to detect
> the extended virtualization features of AMD cpus to show
> them in /proc/cpuinfo.
> 
> Signed-off-by: Joerg Roedel <joerg.roedel@....com>
> ---
>  arch/x86/include/asm/cpufeature.h          |    4 ++++
>  arch/x86/kernel/cpu/addon_cpuid_features.c |    4 ++++
>  2 files changed, 8 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
> index 613700f..7dbc1c2 100644
> --- a/arch/x86/include/asm/cpufeature.h
> +++ b/arch/x86/include/asm/cpufeature.h
> @@ -167,6 +167,10 @@
>  #define X86_FEATURE_FLEXPRIORITY (8*32+ 2) /* Intel FlexPriority */
>  #define X86_FEATURE_EPT         (8*32+ 3) /* Intel Extended Page Table */
>  #define X86_FEATURE_VPID        (8*32+ 4) /* Intel Virtual Processor ID */
> +#define X86_FEATURE_NPT		(8*32+5)  /* AMD Nested Page Table support */
> +#define X86_FEATURE_LBRV	(8*32+6)  /* AMD LBR Virtualization support */
> +#define X86_FEATURE_SVML	(8*32+7)  /* "svm_lock" AMD SVM locking MSR */
> +#define X86_FEATURE_NRIPS	(8*32+8)  /* "nrip_save" AMD SVM next_rip save */
>  
>  #if defined(__KERNEL__) && !defined(__ASSEMBLY__)
>  
> diff --git a/arch/x86/kernel/cpu/addon_cpuid_features.c b/arch/x86/kernel/cpu/addon_cpuid_features.c
> index 468489b..97ad79c 100644
> --- a/arch/x86/kernel/cpu/addon_cpuid_features.c
> +++ b/arch/x86/kernel/cpu/addon_cpuid_features.c
> @@ -32,6 +32,10 @@ void __cpuinit init_scattered_cpuid_features(struct cpuinfo_x86 *c)
>  	static const struct cpuid_bit __cpuinitconst cpuid_bits[] = {
>  		{ X86_FEATURE_IDA, CR_EAX, 1, 0x00000006 },
>  		{ X86_FEATURE_ARAT, CR_EAX, 2, 0x00000006 },
> +		{ X86_FEATURE_NPT,   CR_EDX, 0, 0x8000000a },
> +		{ X86_FEATURE_LBRV,  CR_EDX, 1, 0x8000000a },
> +		{ X86_FEATURE_SVML,  CR_EDX, 2, 0x8000000a },
> +		{ X86_FEATURE_NRIPS, CR_EDX, 3, 0x8000000a },
>  		{ 0, 0, 0, 0 }
>  	};
>  
> -- 
> 1.6.5.4
> 

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