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sparc64/mm: Implement pXX_leaf_size() support

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Sparc64 has non-pagetable aligned large page support; wire up the
pXX_leaf_size() functions to report the correct pagetable page size.

This enables PERF_SAMPLE_{DATA,CODE}_PAGE_SIZE to report accurate
pagetable leaf sizes.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20201126121121.301768209@infradead.org
This commit is contained in:
Peter Zijlstra 2020-11-13 11:46:23 +01:00
parent c5eecbb58f
commit e6e4f42eb7
2 changed files with 26 additions and 6 deletions
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13
arch/sparc/include/asm/pgtable_64.h
View File

@ -1121,6 +1121,19 @@ extern unsigned long cmdline_memory_size;
asmlinkage void do_sparc64_fault(struct pt_regs *regs);
#ifdef CONFIG_HUGETLB_PAGE
#define pud_leaf_size pud_leaf_size
extern unsigned long pud_leaf_size(pud_t pud);
#define pmd_leaf_size pmd_leaf_size
extern unsigned long pmd_leaf_size(pmd_t pmd);
#define pte_leaf_size pte_leaf_size
extern unsigned long pte_leaf_size(pte_t pte);
#endif /* CONFIG_HUGETLB_PAGE */
#endif /* !(__ASSEMBLY__) */
#endif /* !(_SPARC64_PGTABLE_H) */

19
arch/sparc/mm/hugetlbpage.c
View File

@ -247,14 +247,17 @@ static unsigned int sun4u_huge_tte_to_shift(pte_t entry)
return shift;
}
static unsigned long tte_to_shift(pte_t entry)
{
if (tlb_type == hypervisor)
return sun4v_huge_tte_to_shift(entry);
return sun4u_huge_tte_to_shift(entry);
}
static unsigned int huge_tte_to_shift(pte_t entry)
{
unsigned long shift;
if (tlb_type == hypervisor)
shift = sun4v_huge_tte_to_shift(entry);
else
shift = sun4u_huge_tte_to_shift(entry);
unsigned long shift = tte_to_shift(entry);
if (shift == PAGE_SHIFT)
WARN_ONCE(1, "tto_to_shift: invalid hugepage tte=0x%lx\n",
@ -272,6 +275,10 @@ static unsigned long huge_tte_to_size(pte_t pte)
return size;
}
unsigned long pud_leaf_size(pud_t pud) { return 1UL << tte_to_shift(*(pte_t *)&pud); }
unsigned long pmd_leaf_size(pmd_t pmd) { return 1UL << tte_to_shift(*(pte_t *)&pmd); }
unsigned long pte_leaf_size(pte_t pte) { return 1UL << tte_to_shift(pte); }
pte_t *huge_pte_alloc(struct mm_struct *mm,
unsigned long addr, unsigned long sz)
{