mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 09:06:34 +07:00
fd8cfd3000
I've just discovered that the useful-sounding has_transparent_hugepage() is actually an architecture-dependent minefield: on some arches it only builds if CONFIG_TRANSPARENT_HUGEPAGE=y, on others it's also there when not, but on some of those (arm and arm64) it then gives the wrong answer; and on mips alone it's marked __init, which would crash if called later (but so far it has not been called later). Straighten this out: make it available to all configs, with a sensible default in asm-generic/pgtable.h, removing its definitions from those arches (arc, arm, arm64, sparc, tile) which are served by the default, adding #define has_transparent_hugepage has_transparent_hugepage to those (mips, powerpc, s390, x86) which need to override the default at runtime, and removing the __init from mips (but maybe that kind of code should be avoided after init: set a static variable the first time it's called). Signed-off-by: Hugh Dickins <hughd@google.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Andres Lagar-Cavilla <andreslc@google.com> Cc: Yang Shi <yang.shi@linaro.org> Cc: Ning Qu <quning@gmail.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Vineet Gupta <vgupta@synopsys.com> [arch/arc] Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> [arch/s390] Acked-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
#ifndef _ASM_POWERPC_PGTABLE_H
|
|
#define _ASM_POWERPC_PGTABLE_H
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <linux/mmdebug.h>
|
|
#include <linux/mmzone.h>
|
|
#include <asm/processor.h> /* For TASK_SIZE */
|
|
#include <asm/mmu.h>
|
|
#include <asm/page.h>
|
|
|
|
struct mm_struct;
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#ifdef CONFIG_PPC_BOOK3S
|
|
#include <asm/book3s/pgtable.h>
|
|
#else
|
|
#include <asm/nohash/pgtable.h>
|
|
#endif /* !CONFIG_PPC_BOOK3S */
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <asm/tlbflush.h>
|
|
|
|
/* Keep these as a macros to avoid include dependency mess */
|
|
#define pte_page(x) pfn_to_page(pte_pfn(x))
|
|
#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
|
|
|
|
/*
|
|
* ZERO_PAGE is a global shared page that is always zero: used
|
|
* for zero-mapped memory areas etc..
|
|
*/
|
|
extern unsigned long empty_zero_page[];
|
|
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
|
|
|
|
extern pgd_t swapper_pg_dir[];
|
|
|
|
void limit_zone_pfn(enum zone_type zone, unsigned long max_pfn);
|
|
int dma_pfn_limit_to_zone(u64 pfn_limit);
|
|
extern void paging_init(void);
|
|
|
|
/*
|
|
* kern_addr_valid is intended to indicate whether an address is a valid
|
|
* kernel address. Most 32-bit archs define it as always true (like this)
|
|
* but most 64-bit archs actually perform a test. What should we do here?
|
|
*/
|
|
#define kern_addr_valid(addr) (1)
|
|
|
|
#include <asm-generic/pgtable.h>
|
|
|
|
|
|
/*
|
|
* This gets called at the end of handling a page fault, when
|
|
* the kernel has put a new PTE into the page table for the process.
|
|
* We use it to ensure coherency between the i-cache and d-cache
|
|
* for the page which has just been mapped in.
|
|
* On machines which use an MMU hash table, we use this to put a
|
|
* corresponding HPTE into the hash table ahead of time, instead of
|
|
* waiting for the inevitable extra hash-table miss exception.
|
|
*/
|
|
extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
|
|
|
|
extern int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
|
|
unsigned long end, int write,
|
|
struct page **pages, int *nr);
|
|
#ifndef CONFIG_TRANSPARENT_HUGEPAGE
|
|
#define pmd_large(pmd) 0
|
|
#endif
|
|
pte_t *__find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea,
|
|
bool *is_thp, unsigned *shift);
|
|
static inline pte_t *find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea,
|
|
bool *is_thp, unsigned *shift)
|
|
{
|
|
if (!arch_irqs_disabled()) {
|
|
pr_info("%s called with irq enabled\n", __func__);
|
|
dump_stack();
|
|
}
|
|
return __find_linux_pte_or_hugepte(pgdir, ea, is_thp, shift);
|
|
}
|
|
|
|
unsigned long vmalloc_to_phys(void *vmalloc_addr);
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_POWERPC_PGTABLE_H */
|