Re: [Xen-devel] [PATCH v7 1/3] x86: Support enable CDP by boot parameter and add get CDP status

[Chao Peng <chao.p.peng@xxxxxxxxxxxxxxx>]

On Tue, Oct 13, 2015 at 04:53:44PM +0800, He Chen wrote:
> Add boot parameter `psr=cdp` to enable CDP at boot time.
> Intel Code/Data Prioritization (CDP) feature is based on CAT. Note that
> cos_max would be half when CDP is on. struct psr_cat_cbm is extended to
> support CDP operation. Extend psr_get_cat_l3_info sysctl to get CDP
> status.
> 
> Signed-off-by: He Chen <he.chen@xxxxxxxxxxxxxxx>
> Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> ---
> Changes in v7:
> * write CDP data mask (mask1) before turning CDP on
> * check CDP status before clear enabled bit in function cat_cpu_fini

Reviewed-by: Chao Peng <chao.p.peng@xxxxxxxxxxxxxxx>

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