Re: [Xen-devel] [PATCH 4/6] x86/domain: remove the 'oos_off' flag

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: Tim Deegan <tim@xxxxxxx>
> Sent: 24 July 2019 18:45
> To: Paul Durrant <Paul.Durrant@xxxxxxxxxx>
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx; George Dunlap <George.Dunlap@xxxxxxxxxx>; 
> Jan Beulich
> <jbeulich@xxxxxxxx>; Andrew Cooper <Andrew.Cooper3@xxxxxxxxxx>; Wei Liu 
> <wl@xxxxxxx>; Roger Pau Monne
> <roger.pau@xxxxxxxxxx>
> Subject: Re: [PATCH 4/6] x86/domain: remove the 'oos_off' flag
> 
> At 17:06 +0100 on 23 Jul (1563901567), Paul Durrant wrote:
> > The flag is not needed since the domain 'createflags' can now be tested
> > directly.
> >
> > Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
> 
> Acked-by: Tim Deegan <tim@xxxxxxx>
> 
> though some of this change seems to have got into patch 3, maybe they
> were reordered at some point?
>

Oh, yes, they were actually combined when I originally made the change. The 
removal of domcr_flags for shadow_domain_init() would indeed be more logically 
placed in this patch. It's a pretty trivial change so I'll move it in v2 and 
assume your A-b still stands.

  Paul
 

> Cheers,
> 
> Tim.
> 
> 
> > ---
> > Cc: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
> > Cc: Jan Beulich <jbeulich@xxxxxxxx>
> > Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> > Cc: Wei Liu <wl@xxxxxxx>
> > Cc: "Roger Pau Monné" <roger.pau@xxxxxxxxxx>
> > ---
> >  xen/arch/x86/mm/shadow/common.c | 3 +--
> >  xen/include/asm-x86/domain.h    | 1 -
> >  2 files changed, 1 insertion(+), 3 deletions(-)
> >
> > diff --git a/xen/arch/x86/mm/shadow/common.c 
> > b/xen/arch/x86/mm/shadow/common.c
> > index 320ea0db21..2c7fafa4fb 100644
> > --- a/xen/arch/x86/mm/shadow/common.c
> > +++ b/xen/arch/x86/mm/shadow/common.c
> > @@ -62,7 +62,6 @@ int shadow_domain_init(struct domain *d)
> >
> >  #if (SHADOW_OPTIMIZATIONS & SHOPT_OUT_OF_SYNC)
> >      d->arch.paging.shadow.oos_active = 0;
> > -    d->arch.paging.shadow.oos_off = d->createflags & 
> > XEN_DOMCTL_CDF_oos_off;
> >  #endif
> >      d->arch.paging.shadow.pagetable_dying_op = 0;
> >
> > @@ -2523,7 +2522,7 @@ static void sh_update_paging_modes(struct vcpu *v)
> >  #if (SHADOW_OPTIMIZATIONS & SHOPT_OUT_OF_SYNC)
> >      /* We need to check that all the vcpus have paging enabled to
> >       * unsync PTs. */
> > -    if ( is_hvm_domain(d) && !d->arch.paging.shadow.oos_off )
> > +    if ( is_hvm_domain(d) && !(d->createflags & XEN_DOMCTL_CDF_oos_off) )
> >      {
> >          int pe = 1;
> >          struct vcpu *vptr;
> > diff --git a/xen/include/asm-x86/domain.h b/xen/include/asm-x86/domain.h
> > index 933b85901f..5f9899469c 100644
> > --- a/xen/include/asm-x86/domain.h
> > +++ b/xen/include/asm-x86/domain.h
> > @@ -115,7 +115,6 @@ struct shadow_domain {
> >
> >      /* OOS */
> >      bool_t oos_active;
> > -    bool_t oos_off;
> >
> >      /* Has this domain ever used HVMOP_pagetable_dying? */
> >      bool_t pagetable_dying_op;
> > --
> > 2.20.1.2.gb21ebb671
> >

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