Re: [Xen-devel] [PATCH 8/8] viridian: introduce struct viridian_page

2018-10-30 Thread Paul Durrant
> -Original Message-
> From: Roger Pau Monne
> Sent: 30 October 2018 17:18
> To: Paul Durrant 
> Cc: xen-devel@lists.xenproject.org; Wei Liu ; Ian
> Jackson ; Jan Beulich ; Andrew
> Cooper 
> Subject: Re: [Xen-devel] [PATCH 8/8] viridian: introduce struct
> viridian_page
> 
> On Mon, Oct 29, 2018 at 06:02:11PM +, Paul Durrant wrote:
> > The 'vp_assist' page is currently an example of a guest page which needs
> to
> > be kept mapped throughout the life-time of a guest, but there are other
> > such examples in the specifiction [1]. This patch therefore introduces a
> > generic 'viridian_page' type and converts the current
> vp_assist/apic_assist
> > related code to use it. Subsequent patches implementing other
> enlightments
> > can then also make use of it.
> >
> > This patch also renames the 'vp_assist_pending' field in struct
> > hvm_viridian_vcpu_context to 'apic_assist_pending' to more accurately
> > reflect its meaning. The term 'vp_assist' applies to the whole page
> rather
> > than just the EOI-avoidance enlightenment. New versons of the
> specification
> > have defined data structures for other enlightenments within the same
> page.
> >
> > No functional change.
> >
> > [1] https://github.com/MicrosoftDocs/Virtualization-
> Documentation/raw/live/tlfs/Hypervisor%20Top%20Level%20Functional%20Specif
> ication%20v5.0C.pdf
> >
> > Signed-off-by: Paul Durrant 
> 
> Reviewed-by: Roger Pau Monné 
> 

Thanks.

> > ---
> > Cc: Ian Jackson 
> > Cc: Wei Liu 
> > Cc: Jan Beulich 
> > Cc: Andrew Cooper 
> > ---
> >  tools/misc/xen-hvmctx.c|  4 +--
> >  xen/arch/x86/hvm/viridian/synic.c  | 47 ---
> ---
> >  xen/include/asm-x86/hvm/viridian.h | 13 ++
> >  xen/include/public/arch-x86/hvm/save.h |  2 +-
> >  4 files changed, 33 insertions(+), 33 deletions(-)
> >
> > diff --git a/tools/misc/xen-hvmctx.c b/tools/misc/xen-hvmctx.c
> > index 40e77851be..a4efadf307 100644
> > --- a/tools/misc/xen-hvmctx.c
> > +++ b/tools/misc/xen-hvmctx.c
> > @@ -370,9 +370,9 @@ static void dump_viridian_vcpu(void)
> >  {
> >  HVM_SAVE_TYPE(VIRIDIAN_VCPU) p;
> >  READ(p);
> > -printf("VIRIDIAN_VCPU: vp_assist_msr 0x%llx, vp_assist_pending
> %s\n",
> > +printf("VIRIDIAN_VCPU: vp_assist_msr 0x%llx,
> apic_assist_pending %s\n",
> >(unsigned long long) p.vp_assist_msr,
> > -  p.vp_assist_pending ? "true" : "false");
> > +  p.apic_assist_pending ? "true" : "false");
> 
> There's some hardcoded tabs in the above line, would you mind fixing
> them since you are already touching this code?

Sure, I'll take a look at the whitespace.

  Paul

> 
> Thanks, Roger.

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Re: [Xen-devel] [PATCH 8/8] viridian: introduce struct viridian_page

2018-10-30 Thread Roger Pau Monné
On Mon, Oct 29, 2018 at 06:02:11PM +, Paul Durrant wrote:
> The 'vp_assist' page is currently an example of a guest page which needs to
> be kept mapped throughout the life-time of a guest, but there are other
> such examples in the specifiction [1]. This patch therefore introduces a
> generic 'viridian_page' type and converts the current vp_assist/apic_assist
> related code to use it. Subsequent patches implementing other enlightments
> can then also make use of it.
> 
> This patch also renames the 'vp_assist_pending' field in struct
> hvm_viridian_vcpu_context to 'apic_assist_pending' to more accurately
> reflect its meaning. The term 'vp_assist' applies to the whole page rather
> than just the EOI-avoidance enlightenment. New versons of the specification
> have defined data structures for other enlightenments within the same page.
> 
> No functional change.
> 
> [1] 
> https://github.com/MicrosoftDocs/Virtualization-Documentation/raw/live/tlfs/Hypervisor%20Top%20Level%20Functional%20Specification%20v5.0C.pdf
> 
> Signed-off-by: Paul Durrant 

Reviewed-by: Roger Pau Monné 

> ---
> Cc: Ian Jackson 
> Cc: Wei Liu 
> Cc: Jan Beulich 
> Cc: Andrew Cooper 
> ---
>  tools/misc/xen-hvmctx.c|  4 +--
>  xen/arch/x86/hvm/viridian/synic.c  | 47 
> --
>  xen/include/asm-x86/hvm/viridian.h | 13 ++
>  xen/include/public/arch-x86/hvm/save.h |  2 +-
>  4 files changed, 33 insertions(+), 33 deletions(-)
> 
> diff --git a/tools/misc/xen-hvmctx.c b/tools/misc/xen-hvmctx.c
> index 40e77851be..a4efadf307 100644
> --- a/tools/misc/xen-hvmctx.c
> +++ b/tools/misc/xen-hvmctx.c
> @@ -370,9 +370,9 @@ static void dump_viridian_vcpu(void)
>  {
>  HVM_SAVE_TYPE(VIRIDIAN_VCPU) p;
>  READ(p);
> -printf("VIRIDIAN_VCPU: vp_assist_msr 0x%llx, vp_assist_pending %s\n",
> +printf("VIRIDIAN_VCPU: vp_assist_msr 0x%llx, apic_assist_pending 
> %s\n",
>  (unsigned long long) p.vp_assist_msr,
> -p.vp_assist_pending ? "true" : "false");
> +p.apic_assist_pending ? "true" : "false");

There's some hardcoded tabs in the above line, would you mind fixing
them since you are already touching this code?

Thanks, Roger.

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