Re: [Xen-devel] [PATCH v8 17/24] x86: L2 CAT: implement CPU init and free flow.

[Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx>]

On 17-02-28 15:15:36, Roger Pau Monn� wrote:
> On Wed, Feb 15, 2017 at 04:49:32PM +0800, Yi Sun wrote:
> > This patch implements the CPU init and free flow for L2 CAT including
> > L2 CAT initialization callback function.
> > 
> > Signed-off-by: Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx>
> > ---
> >  xen/arch/x86/psr.c        | 72 
> > +++++++++++++++++++++++++++++++++++++++++++++++
> >  xen/include/asm-x86/psr.h |  1 +
> >  2 files changed, 73 insertions(+)
> > 
> > diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c
> > index 0a0bab9..4489637 100644
> > --- a/xen/arch/x86/psr.c
> > +++ b/xen/arch/x86/psr.c
> > @@ -98,6 +98,7 @@ struct feat_hw_info {
> >      union {
> >          struct psr_cat_hw_info l3_cat_info;
> >          struct psr_cat_hw_info l3_cdp_info;
> > +        struct psr_cat_hw_info l2_cat_info;
> >      };
> >  };
> >  
> > @@ -235,6 +236,7 @@ static DEFINE_PER_CPU(struct psr_assoc, psr_assoc);
> >   */
> >  static struct feat_node *feat_l3_cat;
> >  static struct feat_node *feat_l3_cdp;
> > +static struct feat_node *feat_l2_cat;
> >  
> >  /* Common functions. */
> >  static void free_feature(struct psr_socket_info *info)
> > @@ -684,6 +686,53 @@ struct feat_ops l3_cdp_ops = {
> >      .write_msr = l3_cdp_write_msr,
> >  };
> >  
> > +/* L2 CAT callback functions implementation. */
> > +static void l2_cat_init_feature(struct cpuid_leaf regs,
> > +                                struct feat_node *feat,
> > +                                struct psr_socket_info *info)
> 
> This is exactly the same code as l3_cat_init_feature with s/l3/l2/. I think
> those two functions can somehow be merged, and I'm sure there's room for other
> merges, IMHO L2/L3 CAT implementations should share a bunch of code, there's
> too much duplication.
> 
Thanks! Will consider to split common functions out.

> Roger.

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