mirror of
git://git.yoctoproject.org/linux-yocto.git
synced 2026-01-27 12:47:24 +01:00
53fbef56e0
Patch series "Add and use memdesc_flags_t". At some point struct page will be separated from struct slab and struct folio. This is a step towards that by introducing a type for the 'flags' word of all three structures. This gives us a certain amount of type safety by establishing that some of these unsigned longs are different from other unsigned longs in that they contain things like node ID, section number and zone number in the upper bits. That lets us have functions that can be easily called by anyone who has a slab, folio or page (but not easily by anyone else) to get the node or zone. There's going to be some unusual merge problems with this as some odd bits of the kernel decide they want to print out the flags value or something similar by writing page->flags and now they'll need to write page->flags.f instead. That's most of the churn here. Maybe we should be removing these things from the debug output? This patch (of 11): Wrap the unsigned long flags in a typedef. In upcoming patches, this will provide a strong hint that you can't just pass a random unsigned long to functions which take this as an argument. [willy@infradead.org: s/flags/flags.f/ in several architectures] Link: https://lkml.kernel.org/r/aKMgPRLD-WnkPxYm@casper.infradead.org [nicola.vetrini@gmail.com: mips: fix compilation error] Link: https://lore.kernel.org/lkml/CA+G9fYvkpmqGr6wjBNHY=dRp71PLCoi2341JxOudi60yqaeUdg@mail.gmail.com/ Link: https://lkml.kernel.org/r/20250825214245.1838158-1-nicola.vetrini@gmail.com Link: https://lkml.kernel.org/r/20250805172307.1302730-1-willy@infradead.org Link: https://lkml.kernel.org/r/20250805172307.1302730-2-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Zi Yan <ziy@nvidia.com> Cc: Shakeel Butt <shakeel.butt@linux.dev> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* IBM System z Huge TLB Page Support for Kernel.
|
|
*
|
|
* Copyright IBM Corp. 2008
|
|
* Author(s): Gerald Schaefer <gerald.schaefer@de.ibm.com>
|
|
*/
|
|
|
|
#ifndef _ASM_S390_HUGETLB_H
|
|
#define _ASM_S390_HUGETLB_H
|
|
|
|
#include <linux/cpufeature.h>
|
|
#include <linux/pgtable.h>
|
|
#include <linux/swap.h>
|
|
#include <linux/swapops.h>
|
|
#include <asm/page.h>
|
|
|
|
#define hugepages_supported() cpu_has_edat1()
|
|
|
|
#define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
|
|
void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
|
|
pte_t *ptep, pte_t pte, unsigned long sz);
|
|
void __set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
|
|
pte_t *ptep, pte_t pte);
|
|
|
|
#define __HAVE_ARCH_HUGE_PTEP_GET
|
|
pte_t huge_ptep_get(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
|
|
|
|
pte_t __huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
|
|
pte_t *ptep);
|
|
|
|
#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
|
|
static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
|
|
unsigned long addr, pte_t *ptep,
|
|
unsigned long sz)
|
|
{
|
|
return __huge_ptep_get_and_clear(mm, addr, ptep);
|
|
}
|
|
|
|
static inline void arch_clear_hugetlb_flags(struct folio *folio)
|
|
{
|
|
clear_bit(PG_arch_1, &folio->flags.f);
|
|
}
|
|
#define arch_clear_hugetlb_flags arch_clear_hugetlb_flags
|
|
|
|
#define __HAVE_ARCH_HUGE_PTE_CLEAR
|
|
static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
|
|
pte_t *ptep, unsigned long sz)
|
|
{
|
|
if ((pte_val(*ptep) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3)
|
|
set_pte(ptep, __pte(_REGION3_ENTRY_EMPTY));
|
|
else
|
|
set_pte(ptep, __pte(_SEGMENT_ENTRY_EMPTY));
|
|
}
|
|
|
|
#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
|
|
static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
|
|
unsigned long address, pte_t *ptep)
|
|
{
|
|
return __huge_ptep_get_and_clear(vma->vm_mm, address, ptep);
|
|
}
|
|
|
|
#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
|
|
static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
|
|
unsigned long addr, pte_t *ptep,
|
|
pte_t pte, int dirty)
|
|
{
|
|
int changed = !pte_same(huge_ptep_get(vma->vm_mm, addr, ptep), pte);
|
|
|
|
if (changed) {
|
|
__huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
|
|
__set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
|
|
static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
|
|
unsigned long addr, pte_t *ptep)
|
|
{
|
|
pte_t pte = __huge_ptep_get_and_clear(mm, addr, ptep);
|
|
|
|
__set_huge_pte_at(mm, addr, ptep, pte_wrprotect(pte));
|
|
}
|
|
|
|
#define __HAVE_ARCH_HUGE_PTE_MKUFFD_WP
|
|
static inline pte_t huge_pte_mkuffd_wp(pte_t pte)
|
|
{
|
|
return pte;
|
|
}
|
|
|
|
#define __HAVE_ARCH_HUGE_PTE_CLEAR_UFFD_WP
|
|
static inline pte_t huge_pte_clear_uffd_wp(pte_t pte)
|
|
{
|
|
return pte;
|
|
}
|
|
|
|
#define __HAVE_ARCH_HUGE_PTE_UFFD_WP
|
|
static inline int huge_pte_uffd_wp(pte_t pte)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#include <asm-generic/hugetlb.h>
|
|
|
|
#endif /* _ASM_S390_HUGETLB_H */
|