[RFCv2 6/9] pseries: Add hypercall wrappers for hash page table resizing

[David Gibson]

On Mon, Feb 01, 2016 at 12:41:31PM +0530, Anshuman Khandual wrote:
> On 01/29/2016 10:54 AM, David Gibson wrote:
> > This adds the hypercall numbers and wrapper functions for the hash page
> > table resizing hypercalls.
> > 
> > These are experimental "platform specific" values for now, until we have a
> > formal PAPR update.
> > 
> > It also adds a new firmware feature flat to track the presence of the
> > HPT resizing calls.
> 
> Its a flag   ....................... ^^^^^^^ here.

Oops, thanks.

> 
> > 
> > Signed-off-by: David Gibson <david at gibson.dropbear.id.au>
> > ---
> >  arch/powerpc/include/asm/firmware.h       |  5 +++--
> >  arch/powerpc/include/asm/hvcall.h         |  2 ++
> >  arch/powerpc/include/asm/plpar_wrappers.h | 12 ++++++++++++
> >  arch/powerpc/platforms/pseries/firmware.c |  1 +
> >  4 files changed, 18 insertions(+), 2 deletions(-)
> > 
> > diff --git a/arch/powerpc/include/asm/firmware.h b/arch/powerpc/include/asm/firmware.h
> > index b062924..32435d2 100644
> > --- a/arch/powerpc/include/asm/firmware.h
> > +++ b/arch/powerpc/include/asm/firmware.h
> > @@ -42,7 +42,7 @@
> >  #define FW_FEATURE_SPLPAR	ASM_CONST(0x0000000000100000)
> >  #define FW_FEATURE_LPAR		ASM_CONST(0x0000000000400000)
> >  #define FW_FEATURE_PS3_LV1	ASM_CONST(0x0000000000800000)
> > -/* Free				ASM_CONST(0x0000000001000000) */
> > +#define FW_FEATURE_HPT_RESIZE	ASM_CONST(0x0000000001000000)
> >  #define FW_FEATURE_CMO		ASM_CONST(0x0000000002000000)
> >  #define FW_FEATURE_VPHN		ASM_CONST(0x0000000004000000)
> >  #define FW_FEATURE_XCMO		ASM_CONST(0x0000000008000000)
> > @@ -66,7 +66,8 @@ enum {
> >  		FW_FEATURE_MULTITCE | FW_FEATURE_SPLPAR | FW_FEATURE_LPAR |
> >  		FW_FEATURE_CMO | FW_FEATURE_VPHN | FW_FEATURE_XCMO |
> >  		FW_FEATURE_SET_MODE | FW_FEATURE_BEST_ENERGY |
> > -		FW_FEATURE_TYPE1_AFFINITY | FW_FEATURE_PRRN,
> > +		FW_FEATURE_TYPE1_AFFINITY | FW_FEATURE_PRRN |
> > +		FW_FEATURE_HPT_RESIZE,
> >  	FW_FEATURE_PSERIES_ALWAYS = 0,
> >  	FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL,
> >  	FW_FEATURE_POWERNV_ALWAYS = 0,
> > diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h
> > index e3b54dd..195e080 100644
> > --- a/arch/powerpc/include/asm/hvcall.h
> > +++ b/arch/powerpc/include/asm/hvcall.h
> > @@ -293,6 +293,8 @@
> >  
> >  /* Platform specific hcalls, used by KVM */
> >  #define H_RTAS			0xf000
> > +#define H_RESIZE_HPT_PREPARE	0xf003
> > +#define H_RESIZE_HPT_COMMIT	0xf004
> 
> This sound better and matches FW_FEATURE_HPT_RESIZE ?

I'm not quite sure what you're suggesting here.

> #define H_HPT_RESIZE_PREPARE	0xf003
> #define H_HPT_RESIZE_COMMIT	0xf004
> 
> 

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson
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