OrgACRN
/
acrn-kernel
mirror of https://github.com/projectacrn/acrn-kernel.git
1
0
Fork 0
Code Issues Releases Wiki Activity

nios2/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE 

Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by using the yet-unused bit
31.

Link: https://lkml.kernel.org/r/20230113171026.582290-15-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
David Hildenbrand 2023-01-13 18:10:14 +01:00 committed by Andrew Morton
parent 0a9ad8273f
commit 4d1d955f7c
2 changed files with 24 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/nios2/include/asm/pgtable-bits.h
View File

@ -31,4 +31,7 @@
#define _PAGE_ACCESSED (1<<26) /* page referenced */
#define _PAGE_DIRTY (1<<27) /* dirty page */
/* We borrow bit 31 to store the exclusive marker in swap PTEs. */
#define _PAGE_SWP_EXCLUSIVE (1<<31)
#endif /* _ASM_NIOS2_PGTABLE_BITS_H */

22
arch/nios2/include/asm/pgtable.h
View File

@ -239,7 +239,9 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd)
*
* 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
* 0 < type -> 0 0 0 0 0 0 <-------------- offset --------------->
* E < type -> 0 0 0 0 0 0 <-------------- offset --------------->
*
* E is the exclusive marker that is not stored in swap entries.
*
* Note that the offset field is always non-zero if the swap type is 0, thus
* !pte_none() is always true.
@ -251,6 +253,24 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd)
#define __swp_entry_to_pte(swp) ((pte_t) { (swp).val })
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
}
static inline pte_t pte_swp_mkexclusive(pte_t pte)
{
pte_val(pte) |= _PAGE_SWP_EXCLUSIVE;
return pte;
}
static inline pte_t pte_swp_clear_exclusive(pte_t pte)
{
pte_val(pte) &= ~_PAGE_SWP_EXCLUSIVE;
return pte;
}
extern void __init paging_init(void);
extern void __init mmu_init(void);