Re: [Xen-devel] [PATCH v2 08/14] x86/hvm: Collect information of TSC scaling ratio

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Zhang, Haozhong
> Sent: Monday, December 07, 2015 4:59 AM
ratio
> 
> Both VMX TSC scaling and SVM TSC ratio use the 64-bit TSC scaling ratio,
> but the number of fractional bits of the ratio is different between VMX
> and SVM. This patch adds the architecture code to collect the number of
> fractional bits and other related information into fields of struct
> hvm_function_table so that they can be used in the common code.
> 
> Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>, with one comment


> diff --git a/xen/include/asm-x86/hvm/hvm.h b/xen/include/asm-x86/hvm/hvm.h
> index aba63ab..8b10a67 100644
> --- a/xen/include/asm-x86/hvm/hvm.h
> +++ b/xen/include/asm-x86/hvm/hvm.h
> @@ -100,6 +100,18 @@ struct hvm_function_table {
>      unsigned int hap_capabilities;
> 
>      /*
> +     * Parameters of hardware-assisted TSC scaling.
> +     */
> +    /* is TSC scaling supported? */
> +    bool_t   tsc_scaling_supported;
> +    /* number of bits of the fractional part of TSC scaling ratio */
> +    uint8_t  tsc_scaling_ratio_frac_bits;
> +    /* default TSC scaling ratio (no scaling) */
> +    uint64_t default_tsc_scaling_ratio;
> +    /* maxmimum-allowed TSC scaling ratio */

maxmimum -> maximum

> +    uint64_t max_tsc_scaling_ratio;
> +
> +    /*
>       * Initialise/destroy HVM domain/vcpu resources
>       */
>      int  (*domain_initialise)(struct domain *d);
> --
> 2.6.3


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel