mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-18 12:59:36 +07:00
b27873702b
With new refcounting we don't need to mark PMDs splitting. Let's drop code to handle this. pmdp_splitting_flush() is not needed too: on splitting PMD we will do pmdp_clear_flush() + set_pte_at(). pmdp_clear_flush() will do IPI as needed for fast_gup. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Jerome Marchand <jmarchan@redhat.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Steve Capper <steve.capper@linaro.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
98 lines
1.9 KiB
C
98 lines
1.9 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1999, 2000 by Silicon Graphics
|
|
* Copyright (C) 2003 by Ralf Baechle
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/mm.h>
|
|
#include <asm/fixmap.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/pgalloc.h>
|
|
#include <asm/tlbflush.h>
|
|
|
|
void pgd_init(unsigned long page)
|
|
{
|
|
unsigned long *p, *end;
|
|
unsigned long entry;
|
|
|
|
#ifdef __PAGETABLE_PMD_FOLDED
|
|
entry = (unsigned long)invalid_pte_table;
|
|
#else
|
|
entry = (unsigned long)invalid_pmd_table;
|
|
#endif
|
|
|
|
p = (unsigned long *) page;
|
|
end = p + PTRS_PER_PGD;
|
|
|
|
do {
|
|
p[0] = entry;
|
|
p[1] = entry;
|
|
p[2] = entry;
|
|
p[3] = entry;
|
|
p[4] = entry;
|
|
p += 8;
|
|
p[-3] = entry;
|
|
p[-2] = entry;
|
|
p[-1] = entry;
|
|
} while (p != end);
|
|
}
|
|
|
|
#ifndef __PAGETABLE_PMD_FOLDED
|
|
void pmd_init(unsigned long addr, unsigned long pagetable)
|
|
{
|
|
unsigned long *p, *end;
|
|
|
|
p = (unsigned long *) addr;
|
|
end = p + PTRS_PER_PMD;
|
|
|
|
do {
|
|
p[0] = pagetable;
|
|
p[1] = pagetable;
|
|
p[2] = pagetable;
|
|
p[3] = pagetable;
|
|
p[4] = pagetable;
|
|
p += 8;
|
|
p[-3] = pagetable;
|
|
p[-2] = pagetable;
|
|
p[-1] = pagetable;
|
|
} while (p != end);
|
|
}
|
|
#endif
|
|
|
|
pmd_t mk_pmd(struct page *page, pgprot_t prot)
|
|
{
|
|
pmd_t pmd;
|
|
|
|
pmd_val(pmd) = (page_to_pfn(page) << _PFN_SHIFT) | pgprot_val(prot);
|
|
|
|
return pmd;
|
|
}
|
|
|
|
void set_pmd_at(struct mm_struct *mm, unsigned long addr,
|
|
pmd_t *pmdp, pmd_t pmd)
|
|
{
|
|
*pmdp = pmd;
|
|
flush_tlb_all();
|
|
}
|
|
|
|
void __init pagetable_init(void)
|
|
{
|
|
unsigned long vaddr;
|
|
pgd_t *pgd_base;
|
|
|
|
/* Initialize the entire pgd. */
|
|
pgd_init((unsigned long)swapper_pg_dir);
|
|
#ifndef __PAGETABLE_PMD_FOLDED
|
|
pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_table);
|
|
#endif
|
|
pgd_base = swapper_pg_dir;
|
|
/*
|
|
* Fixed mappings:
|
|
*/
|
|
vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
|
|
fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base);
|
|
}
|