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sparc64: Add support for 2G hugepages 

Signed-off-by: Nitin Gupta <nitin.m.gupta@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Nitin Gupta 2017-03-09 14:22:23 -08:00 committed by David S. Miller
parent 59f1183dd3
commit 85b1da7c47
3 changed files with 13 additions and 1 deletions
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3
arch/sparc/include/asm/page_64.h
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@ -17,6 +17,7 @@
#define HPAGE_SHIFT 23
#define REAL_HPAGE_SHIFT 22
#define HPAGE_2GB_SHIFT 31
#define HPAGE_256MB_SHIFT 28
#define HPAGE_64K_SHIFT 16
#define REAL_HPAGE_SIZE (_AC(1,UL) << REAL_HPAGE_SHIFT)
@ -27,7 +28,7 @@
#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))
#define HUGE_MAX_HSTATE 3
#define HUGE_MAX_HSTATE 4
#endif
#ifndef __ASSEMBLY__

7
arch/sparc/mm/hugetlbpage.c
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@ -143,6 +143,10 @@ static pte_t sun4v_hugepage_shift_to_tte(pte_t entry, unsigned int shift)
pte_val(entry) = pte_val(entry) & ~_PAGE_SZALL_4V;
switch (shift) {
case HPAGE_2GB_SHIFT:
hugepage_size = _PAGE_SZ2GB_4V;
pte_val(entry) |= _PAGE_PMD_HUGE;
break;
case HPAGE_256MB_SHIFT:
hugepage_size = _PAGE_SZ256MB_4V;
pte_val(entry) |= _PAGE_PMD_HUGE;
@ -183,6 +187,9 @@ static unsigned int sun4v_huge_tte_to_shift(pte_t entry)
unsigned int shift;
switch (tte_szbits) {
case _PAGE_SZ2GB_4V:
shift = HPAGE_2GB_SHIFT;
break;
case _PAGE_SZ256MB_4V:
shift = HPAGE_256MB_SHIFT;
break;

4
arch/sparc/mm/init_64.c
View File

@ -337,6 +337,10 @@ static int __init setup_hugepagesz(char *string)
hugepage_shift = ilog2(hugepage_size);
switch (hugepage_shift) {
case HPAGE_2GB_SHIFT:
hv_pgsz_mask = HV_PGSZ_MASK_2GB;
hv_pgsz_idx = HV_PGSZ_IDX_2GB;
break;
case HPAGE_256MB_SHIFT:
hv_pgsz_mask = HV_PGSZ_MASK_256MB;
hv_pgsz_idx = HV_PGSZ_IDX_256MB;