| Message ID | 1443818865-19846-3-git-send-email-jeremy.linton@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Fri, Oct 02, 2015 at 03:47:40PM -0500, Jeremy Linton wrote: > Define the bit positions in the PTE and PMD for the > contiguous bit. > > Signed-off-by: Jeremy Linton <jeremy.linton@arm.com> > --- > arch/arm64/include/asm/pgtable-hwdef.h | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h > index 24154b0..361352d 100644 > --- a/arch/arm64/include/asm/pgtable-hwdef.h > +++ b/arch/arm64/include/asm/pgtable-hwdef.h > @@ -55,6 +55,13 @@ > #define SECTION_MASK (~(SECTION_SIZE-1)) > > /* > + * Contiguous page definitions. > + */ > +#define CONT_RANGE (_AC(1, UL) << CONT_SHIFT) > +#define CONT_RANGE_MASK ((CONT_RANGE-1) << PAGE_SHIFT) > +#define CONT_RANGE_OFFSET(addr) (((addr)>>PAGE_SHIFT)&(CONT_RANGE-1)) This still looks confusing to me: CONT_RANGE refers to the number of contiguous ptes while CONT_RANGE_MASK refers to actual addresses. I'd rather have CONT_PTES (since we only use this for ptes currently) and CONT_MASK used instead of CONT_RANGE_MASK. This is for consistency with SECTION_MASK which we already use.
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h index 24154b0..361352d 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -55,6 +55,13 @@ #define SECTION_MASK (~(SECTION_SIZE-1)) /* + * Contiguous page definitions. + */ +#define CONT_RANGE (_AC(1, UL) << CONT_SHIFT) +#define CONT_RANGE_MASK ((CONT_RANGE-1) << PAGE_SHIFT) +#define CONT_RANGE_OFFSET(addr) (((addr)>>PAGE_SHIFT)&(CONT_RANGE-1)) + +/* * Hardware page table definitions. * * Level 1 descriptor (PUD). @@ -83,6 +90,7 @@ #define PMD_SECT_S (_AT(pmdval_t, 3) << 8) #define PMD_SECT_AF (_AT(pmdval_t, 1) << 10) #define PMD_SECT_NG (_AT(pmdval_t, 1) << 11) +#define PMD_SECT_CONT (_AT(pmdval_t, 1) << 52) #define PMD_SECT_PXN (_AT(pmdval_t, 1) << 53) #define PMD_SECT_UXN (_AT(pmdval_t, 1) << 54) @@ -105,6 +113,7 @@ #define PTE_AF (_AT(pteval_t, 1) << 10) /* Access Flag */ #define PTE_NG (_AT(pteval_t, 1) << 11) /* nG */ #define PTE_DBM (_AT(pteval_t, 1) << 51) /* Dirty Bit Management */ +#define PTE_CONT (_AT(pteval_t, 1) << 52) /* Contiguous range */ #define PTE_PXN (_AT(pteval_t, 1) << 53) /* Privileged XN */ #define PTE_UXN (_AT(pteval_t, 1) << 54) /* User XN */
Define the bit positions in the PTE and PMD for the contiguous bit. Signed-off-by: Jeremy Linton <jeremy.linton@arm.com> --- arch/arm64/include/asm/pgtable-hwdef.h | 9 +++++++++ 1 file changed, 9 insertions(+)