mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
1e953d846a
Commit af1b1a9b36 ("sparc64 mm: Fix base TSB sizing when hugetlb
pages are used") addressed the difference between hugetlb and THP
pages when computing TSB sizes. The following additional issues
were also discovered while working with the code.
In order to save memory, THP makes use of a huge zero page. This huge
zero page does not count against a task's RSS, but it does consume TSB
entries. This is similar to hugetlb pages. Therefore, count huge
zero page entries in hugetlb_pte_count.
Accounting of THP pages is done in the routine set_pmd_at().
Unfortunately, this does not catch the case where a THP page is split.
To handle this case, decrement the count in pmdp_invalidate().
pmdp_invalidate is only called when splitting a THP. However, 'sanity
checks' are added in case it is ever called for other purposes.
A more general issue exists with HPAGE_SIZE accounting.
hugetlb_pte_count tracks the number of HPAGE_SIZE (8M) pages. This
value is used to size the TSB for HPAGE_SIZE pages. However,
each HPAGE_SIZE page consists of two REAL_HPAGE_SIZE (4M) pages.
The TSB contains an entry for each REAL_HPAGE_SIZE page. Therefore,
the number of REAL_HPAGE_SIZE pages should be used to size the huge
page TSB. A new compile time constant REAL_HPAGE_PER_HPAGE is used
to multiply hugetlb_pte_count before sizing the TSB.
Changes from V1
- Fixed build issue if hugetlb or THP not configured
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
156 lines
4.3 KiB
C
156 lines
4.3 KiB
C
#ifndef _SPARC64_PAGE_H
|
|
#define _SPARC64_PAGE_H
|
|
|
|
#include <linux/const.h>
|
|
|
|
#define PAGE_SHIFT 13
|
|
|
|
#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
|
|
#define PAGE_MASK (~(PAGE_SIZE-1))
|
|
|
|
/* Flushing for D-cache alias handling is only needed if
|
|
* the page size is smaller than 16K.
|
|
*/
|
|
#if PAGE_SHIFT < 14
|
|
#define DCACHE_ALIASING_POSSIBLE
|
|
#endif
|
|
|
|
#define HPAGE_SHIFT 23
|
|
#define REAL_HPAGE_SHIFT 22
|
|
|
|
#define REAL_HPAGE_SIZE (_AC(1,UL) << REAL_HPAGE_SHIFT)
|
|
|
|
#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
|
|
#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
|
|
#define HPAGE_MASK (~(HPAGE_SIZE - 1UL))
|
|
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
|
|
#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
|
|
#define REAL_HPAGE_PER_HPAGE (_AC(1,UL) << (HPAGE_SHIFT - REAL_HPAGE_SHIFT))
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
|
|
struct pt_regs;
|
|
void hugetlb_setup(struct pt_regs *regs);
|
|
#endif
|
|
|
|
#define WANT_PAGE_VIRTUAL
|
|
|
|
void _clear_page(void *page);
|
|
#define clear_page(X) _clear_page((void *)(X))
|
|
struct page;
|
|
void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
|
|
#define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
|
|
void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
|
|
|
|
/* Unlike sparc32, sparc64's parameter passing API is more
|
|
* sane in that structures which as small enough are passed
|
|
* in registers instead of on the stack. Thus, setting
|
|
* STRICT_MM_TYPECHECKS does not generate worse code so
|
|
* let's enable it to get the type checking.
|
|
*/
|
|
|
|
#define STRICT_MM_TYPECHECKS
|
|
|
|
#ifdef STRICT_MM_TYPECHECKS
|
|
/* These are used to make use of C type-checking.. */
|
|
typedef struct { unsigned long pte; } pte_t;
|
|
typedef struct { unsigned long iopte; } iopte_t;
|
|
typedef struct { unsigned long pmd; } pmd_t;
|
|
typedef struct { unsigned long pud; } pud_t;
|
|
typedef struct { unsigned long pgd; } pgd_t;
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
|
|
|
#define pte_val(x) ((x).pte)
|
|
#define iopte_val(x) ((x).iopte)
|
|
#define pmd_val(x) ((x).pmd)
|
|
#define pud_val(x) ((x).pud)
|
|
#define pgd_val(x) ((x).pgd)
|
|
#define pgprot_val(x) ((x).pgprot)
|
|
|
|
#define __pte(x) ((pte_t) { (x) } )
|
|
#define __iopte(x) ((iopte_t) { (x) } )
|
|
#define __pmd(x) ((pmd_t) { (x) } )
|
|
#define __pud(x) ((pud_t) { (x) } )
|
|
#define __pgd(x) ((pgd_t) { (x) } )
|
|
#define __pgprot(x) ((pgprot_t) { (x) } )
|
|
|
|
#else
|
|
/* .. while these make it easier on the compiler */
|
|
typedef unsigned long pte_t;
|
|
typedef unsigned long iopte_t;
|
|
typedef unsigned long pmd_t;
|
|
typedef unsigned long pud_t;
|
|
typedef unsigned long pgd_t;
|
|
typedef unsigned long pgprot_t;
|
|
|
|
#define pte_val(x) (x)
|
|
#define iopte_val(x) (x)
|
|
#define pmd_val(x) (x)
|
|
#define pud_val(x) (x)
|
|
#define pgd_val(x) (x)
|
|
#define pgprot_val(x) (x)
|
|
|
|
#define __pte(x) (x)
|
|
#define __iopte(x) (x)
|
|
#define __pmd(x) (x)
|
|
#define __pud(x) (x)
|
|
#define __pgd(x) (x)
|
|
#define __pgprot(x) (x)
|
|
|
|
#endif /* (STRICT_MM_TYPECHECKS) */
|
|
|
|
typedef pte_t *pgtable_t;
|
|
|
|
extern unsigned long sparc64_va_hole_top;
|
|
extern unsigned long sparc64_va_hole_bottom;
|
|
|
|
/* The next two defines specify the actual exclusion region we
|
|
* enforce, wherein we use a 4GB red zone on each side of the VA hole.
|
|
*/
|
|
#define VA_EXCLUDE_START (sparc64_va_hole_bottom - (1UL << 32UL))
|
|
#define VA_EXCLUDE_END (sparc64_va_hole_top + (1UL << 32UL))
|
|
|
|
#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
|
|
_AC(0x0000000070000000,UL) : \
|
|
VA_EXCLUDE_END)
|
|
|
|
#include <asm-generic/memory_model.h>
|
|
|
|
extern unsigned long PAGE_OFFSET;
|
|
|
|
#endif /* !(__ASSEMBLY__) */
|
|
|
|
/* The maximum number of physical memory address bits we support. The
|
|
* largest value we can support is whatever "KPGD_SHIFT + KPTE_BITS"
|
|
* evaluates to.
|
|
*/
|
|
#define MAX_PHYS_ADDRESS_BITS 53
|
|
|
|
#define ILOG2_4MB 22
|
|
#define ILOG2_256MB 28
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
|
|
#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
|
|
|
|
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
|
|
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
|
|
|
|
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
|
|
|
|
#define virt_to_phys __pa
|
|
#define phys_to_virt __va
|
|
|
|
#endif /* !(__ASSEMBLY__) */
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#include <asm-generic/getorder.h>
|
|
|
|
#endif /* _SPARC64_PAGE_H */
|