On Tue, Oct 24, 2017 at 11:58:29AM +0530, Aneesh Kumar K.V wrote:
> Ram Pai writes:
> +
> > +#define mm_set_pkey_is_allocated(mm, pkey) \
> > + (mm_pkey_allocation_map(mm) & pkey_alloc_mask(pkey))
> > +
>
> > static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey)
> > {
> > -
Ram Pai writes:
+
> +#define mm_set_pkey_is_allocated(mm, pkey) \
> + (mm_pkey_allocation_map(mm) & pkey_alloc_mask(pkey))
> +
> static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey)
> {
> - return (pkey == 0);
> + /* a reserved key is never considered as 'expli
On Mon, Oct 23, 2017 at 03:11:28PM +0530, Aneesh Kumar K.V wrote:
> Ram Pai writes:
>
> > Total 32 keys are available on power7 and above. However
> > pkey 0,1 are reserved. So effectively we have 30 pkeys.
>
> When you say reserved, reserved by whom? Is that part of ISA or PAPR ?
> Also do yo
Ram Pai writes:
> Total 32 keys are available on power7 and above. However
> pkey 0,1 are reserved. So effectively we have 30 pkeys.
When you say reserved, reserved by whom? Is that part of ISA or PAPR ?
Also do you expect that to change. If not why all these indirection?
Can we have the mask
On Fri, 8 Sep 2017 15:44:51 -0700
Ram Pai wrote:
> Total 32 keys are available on power7 and above. However
> pkey 0,1 are reserved. So effectively we have 30 pkeys.
>
> On 4K kernels, we do not have 5 bits in the PTE to
> represent all the keys; we only have 3bits.Two of those
> keys
On Sat, Oct 07, 2017 at 09:02:55PM +1100, Michael Ellerman wrote:
> Ram Pai writes:
>
> > Total 32 keys are available on power7 and above. However
> > pkey 0,1 are reserved. So effectively we have 30 pkeys.
> >
> > On 4K kernels, we do not have 5 bits in the PTE to
> > represent all the
Ram Pai writes:
> Total 32 keys are available on power7 and above. However
> pkey 0,1 are reserved. So effectively we have 30 pkeys.
>
> On 4K kernels, we do not have 5 bits in the PTE to
> represent all the keys; we only have 3bits.Two of those
> keys are reserved; pkey 0 and pkey 1. So
Total 32 keys are available on power7 and above. However
pkey 0,1 are reserved. So effectively we have 30 pkeys.
On 4K kernels, we do not have 5 bits in the PTE to
represent all the keys; we only have 3bits.Two of those
keys are reserved; pkey 0 and pkey 1. So effectively we
have 6 pkeys
