The following commit has been merged into the perf/core branch of tip:
Commit-ID: e6e4f42eb773c1da869af4bad544c26c89cd01ab
Gitweb: https://git.kernel.org/tip/e6e4f42eb773c1da869af4bad544c26c89cd01ab
Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
AuthorDate: Fri, 13 Nov 2020 11:46:23 +01:00
Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Wed, 09 Dec 2020 17:08:56 +01:00
sparc64/mm: Implement pXX_leaf_size() support
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@xxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/20201126121121.301768209@xxxxxxxxxxxxx
---
arch/sparc/include/asm/pgtable_64.h | 13 +++++++++++++
arch/sparc/mm/hugetlbpage.c | 19 +++++++++++++------
2 files changed, 26 insertions(+), 6 deletions(-)
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index 7ef6aff..550d390 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -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) */
diff --git a/arch/sparc/mm/hugetlbpage.c b/arch/sparc/mm/hugetlbpage.c
index ec423b5..ad4b42f 100644
--- a/arch/sparc/mm/hugetlbpage.c
+++ b/arch/sparc/mm/hugetlbpage.c
@@ -247,14 +247,17 @@ static unsigned int sun4u_huge_tte_to_shift(pte_t entry)
return shift;
}
-static unsigned int huge_tte_to_shift(pte_t entry)
+static unsigned long 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);
+ 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 = 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)
{
|