@@ -921,8 +921,29 @@ static inline pud_t pte_pud(pte_t pte)
{
return __pud_raw(pte_raw(pte));
}
+
+static inline pte_t *pudp_ptep(pud_t *pud)
+{
+ return (pte_t *)pud;
+}
+
+#define pud_pfn(pud) pte_pfn(pud_pte(pud))
+#define pud_dirty(pud) pte_dirty(pud_pte(pud))
+#define pud_young(pud) pte_young(pud_pte(pud))
+#define pud_mkold(pud) pte_pud(pte_mkold(pud_pte(pud)))
+#define pud_wrprotect(pud) pte_pud(pte_wrprotect(pud_pte(pud)))
+#define pud_mkdirty(pud) pte_pud(pte_mkdirty(pud_pte(pud)))
+#define pud_mkclean(pud) pte_pud(pte_mkclean(pud_pte(pud)))
+#define pud_mkyoung(pud) pte_pud(pte_mkyoung(pud_pte(pud)))
+#define pud_mkwrite(pud) pte_pud(pte_mkwrite(pud_pte(pud)))
#define pud_write(pud) pte_write(pud_pte(pud))
+#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
+#define pud_soft_dirty(pmd) pte_soft_dirty(pud_pte(pud))
+#define pud_mksoft_dirty(pmd) pte_pud(pte_mksoft_dirty(pud_pte(pud)))
+#define pud_clear_soft_dirty(pmd) pte_pud(pte_clear_soft_dirty(pud_pte(pud)))
+#endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */
+
static inline int pud_bad(pud_t pud)
{
if (radix_enabled())
@@ -1115,15 +1136,24 @@ static inline bool pmd_access_permitted(pmd_t pmd, bool write)
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
extern pmd_t pfn_pmd(unsigned long pfn, pgprot_t pgprot);
+extern pud_t pfn_pud(unsigned long pfn, pgprot_t pgprot);
extern pmd_t mk_pmd(struct page *page, pgprot_t pgprot);
extern pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot);
extern void set_pmd_at(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, pmd_t pmd);
+extern void set_pud_at(struct mm_struct *mm, unsigned long addr,
+ pud_t *pudp, pud_t pud);
+
static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
unsigned long addr, pmd_t *pmd)
{
}
+static inline void update_mmu_cache_pud(struct vm_area_struct *vma,
+ unsigned long addr, pud_t *pud)
+{
+}
+
extern int hash__has_transparent_hugepage(void);
static inline int has_transparent_hugepage(void)
{
@@ -1133,6 +1163,14 @@ static inline int has_transparent_hugepage(void)
}
#define has_transparent_hugepage has_transparent_hugepage
+static inline int has_transparent_pud_hugepage(void)
+{
+ if (radix_enabled())
+ return radix__has_transparent_pud_hugepage();
+ return 0;
+}
+#define has_transparent_pud_hugepage has_transparent_pud_hugepage
+
static inline unsigned long
pmd_hugepage_update(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp,
unsigned long clr, unsigned long set)
@@ -1142,6 +1180,16 @@ pmd_hugepage_update(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp,
return hash__pmd_hugepage_update(mm, addr, pmdp, clr, set);
}
+static inline unsigned long
+pud_hugepage_update(struct mm_struct *mm, unsigned long addr, pud_t *pudp,
+ unsigned long clr, unsigned long set)
+{
+ if (radix_enabled())
+ return radix__pud_hugepage_update(mm, addr, pudp, clr, set);
+ BUG();
+ return pud_val(*pudp);
+}
+
/*
* returns true for pmd migration entries, THP, devmap, hugetlb
* But compile time dependent on THP config
@@ -1151,6 +1199,11 @@ static inline int pmd_large(pmd_t pmd)
return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
}
+static inline int pud_large(pud_t pud)
+{
+ return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
+}
+
/*
* For radix we should always find H_PAGE_HASHPTE zero. Hence
* the below will work for radix too
@@ -1166,6 +1219,17 @@ static inline int __pmdp_test_and_clear_young(struct mm_struct *mm,
return ((old & _PAGE_ACCESSED) != 0);
}
+static inline int __pudp_test_and_clear_young(struct mm_struct *mm,
+ unsigned long addr, pud_t *pudp)
+{
+ unsigned long old;
+
+ if ((pud_raw(*pudp) & cpu_to_be64(_PAGE_ACCESSED | H_PAGE_HASHPTE)) == 0)
+ return 0;
+ old = pud_hugepage_update(mm, addr, pudp, _PAGE_ACCESSED, 0);
+ return ((old & _PAGE_ACCESSED) != 0);
+}
+
#define __HAVE_ARCH_PMDP_SET_WRPROTECT
static inline void pmdp_set_wrprotect(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp)
@@ -1174,6 +1238,14 @@ static inline void pmdp_set_wrprotect(struct mm_struct *mm, unsigned long addr,
pmd_hugepage_update(mm, addr, pmdp, _PAGE_WRITE, 0);
}
+#define __HAVE_ARCH_PUDP_SET_WRPROTECT
+static inline void pudp_set_wrprotect(struct mm_struct *mm, unsigned long addr,
+ pud_t *pudp)
+{
+ if (pud_write(*pudp))
+ pud_hugepage_update(mm, addr, pudp, _PAGE_WRITE, 0);
+}
+
/*
* Only returns true for a THP. False for pmd migration entry.
* We also need to return true when we come across a pte that
@@ -1195,6 +1267,17 @@ static inline int pmd_trans_huge(pmd_t pmd)
return hash__pmd_trans_huge(pmd);
}
+static inline int pud_trans_huge(pud_t pud)
+{
+ if (!pud_present(pud))
+ return false;
+
+ if (radix_enabled())
+ return radix__pud_trans_huge(pud);
+ return 0;
+}
+
+
#define __HAVE_ARCH_PMD_SAME
static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b)
{
@@ -1203,6 +1286,16 @@ static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b)
return hash__pmd_same(pmd_a, pmd_b);
}
+#define __HAVE_ARCH_PUD_SAME
+static inline int pud_same(pud_t pud_a, pud_t pud_b)
+{
+ if (radix_enabled())
+ return radix__pud_same(pud_a, pud_b);
+ BUG();
+ return 0;
+}
+
+
static inline pmd_t __pmd_mkhuge(pmd_t pmd)
{
if (radix_enabled())
@@ -1210,6 +1303,14 @@ static inline pmd_t __pmd_mkhuge(pmd_t pmd)
return hash__pmd_mkhuge(pmd);
}
+static inline pud_t __pud_mkhuge(pud_t pud)
+{
+ if (radix_enabled())
+ return radix__pud_mkhuge(pud);
+ BUG();
+ return pud;
+}
+
/*
* pfn_pmd return a pmd_t that can be used as pmd pte entry.
*/
@@ -1225,14 +1326,34 @@ static inline pmd_t pmd_mkhuge(pmd_t pmd)
return pmd;
}
+static inline pud_t pud_mkhuge(pud_t pud)
+{
+#ifdef CONFIG_DEBUG_VM
+ if (radix_enabled())
+ WARN_ON((pud_raw(pud) & cpu_to_be64(_PAGE_PTE)) == 0);
+ else
+ WARN_ON(1);
+#endif
+ return pud;
+}
+
+
#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
extern int pmdp_set_access_flags(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp,
pmd_t entry, int dirty);
+#define __HAVE_ARCH_PUDP_SET_ACCESS_FLAGS
+extern int pudp_set_access_flags(struct vm_area_struct *vma,
+ unsigned long address, pud_t *pudp,
+ pud_t entry, int dirty);
#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
extern int pmdp_test_and_clear_young(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp);
+#define __HAVE_ARCH_PUDP_TEST_AND_CLEAR_YOUNG
+extern int pudp_test_and_clear_young(struct vm_area_struct *vma,
+ unsigned long address, pud_t *pudp);
+
#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
@@ -1243,6 +1364,16 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
return hash__pmdp_huge_get_and_clear(mm, addr, pmdp);
}
+#define __HAVE_ARCH_PUDP_HUGE_GET_AND_CLEAR
+static inline pud_t pudp_huge_get_and_clear(struct mm_struct *mm,
+ unsigned long addr, pud_t *pudp)
+{
+ if (radix_enabled())
+ return radix__pudp_huge_get_and_clear(mm, addr, pudp);
+ BUG();
+ return *pudp;
+}
+
static inline pmd_t pmdp_collapse_flush(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp)
{
@@ -1257,6 +1388,11 @@ pmd_t pmdp_huge_get_and_clear_full(struct vm_area_struct *vma,
unsigned long addr,
pmd_t *pmdp, int full);
+#define __HAVE_ARCH_PUDP_HUGE_GET_AND_CLEAR_FULL
+pud_t pudp_huge_get_and_clear_full(struct vm_area_struct *vma,
+ unsigned long addr,
+ pud_t *pudp, int full);
+
#define __HAVE_ARCH_PGTABLE_DEPOSIT
static inline void pgtable_trans_huge_deposit(struct mm_struct *mm,
pmd_t *pmdp, pgtable_t pgtable)
@@ -1305,6 +1441,14 @@ static inline pmd_t pmd_mkdevmap(pmd_t pmd)
return hash__pmd_mkdevmap(pmd);
}
+static inline pud_t pud_mkdevmap(pud_t pud)
+{
+ if (radix_enabled())
+ return radix__pud_mkdevmap(pud);
+ BUG();
+ return pud;
+}
+
static inline int pmd_devmap(pmd_t pmd)
{
return pte_devmap(pmd_pte(pmd));
@@ -1312,7 +1456,7 @@ static inline int pmd_devmap(pmd_t pmd)
static inline int pud_devmap(pud_t pud)
{
- return 0;
+ return pte_devmap(pud_pte(pud));
}
static inline int pgd_devmap(pgd_t pgd)
@@ -1321,16 +1465,6 @@ static inline int pgd_devmap(pgd_t pgd)
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
-static inline int pud_pfn(pud_t pud)
-{
- /*
- * Currently all calls to pud_pfn() are gated around a pud_devmap()
- * check so this should never be used. If it grows another user we
- * want to know about it.
- */
- BUILD_BUG();
- return 0;
-}
#define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION
pte_t ptep_modify_prot_start(struct vm_area_struct *, unsigned long, pte_t *);
void ptep_modify_prot_commit(struct vm_area_struct *, unsigned long,
@@ -250,6 +250,10 @@ static inline int radix__pud_bad(pud_t pud)
return !!(pud_val(pud) & RADIX_PUD_BAD_BITS);
}
+static inline int radix__pud_same(pud_t pud_a, pud_t pud_b)
+{
+ return ((pud_raw(pud_a) ^ pud_raw(pud_b)) == 0);
+}
static inline int radix__p4d_bad(p4d_t p4d)
{
@@ -268,9 +272,22 @@ static inline pmd_t radix__pmd_mkhuge(pmd_t pmd)
return __pmd(pmd_val(pmd) | _PAGE_PTE);
}
+static inline int radix__pud_trans_huge(pud_t pud)
+{
+ return (pud_val(pud) & (_PAGE_PTE | _PAGE_DEVMAP)) == _PAGE_PTE;
+}
+
+static inline pud_t radix__pud_mkhuge(pud_t pud)
+{
+ return __pud(pud_val(pud) | _PAGE_PTE);
+}
+
extern unsigned long radix__pmd_hugepage_update(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, unsigned long clr,
unsigned long set);
+extern unsigned long radix__pud_hugepage_update(struct mm_struct *mm, unsigned long addr,
+ pud_t *pudp, unsigned long clr,
+ unsigned long set);
extern pmd_t radix__pmdp_collapse_flush(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp);
extern void radix__pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
@@ -278,6 +295,9 @@ extern void radix__pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
extern pgtable_t radix__pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
extern pmd_t radix__pmdp_huge_get_and_clear(struct mm_struct *mm,
unsigned long addr, pmd_t *pmdp);
+pud_t radix__pudp_huge_get_and_clear(struct mm_struct *mm,
+ unsigned long addr, pud_t *pudp);
+
static inline int radix__has_transparent_hugepage(void)
{
/* For radix 2M at PMD level means thp */
@@ -285,6 +305,14 @@ static inline int radix__has_transparent_hugepage(void)
return 1;
return 0;
}
+
+static inline int radix__has_transparent_pud_hugepage(void)
+{
+ /* For radix 1G at PUD level means pud hugepage support */
+ if (mmu_psize_defs[MMU_PAGE_1G].shift == PUD_SHIFT)
+ return 1;
+ return 0;
+}
#endif
static inline pmd_t radix__pmd_mkdevmap(pmd_t pmd)
@@ -292,9 +320,17 @@ static inline pmd_t radix__pmd_mkdevmap(pmd_t pmd)
return __pmd(pmd_val(pmd) | (_PAGE_PTE | _PAGE_DEVMAP));
}
+static inline pud_t radix__pud_mkdevmap(pud_t pud)
+{
+ return __pud(pud_val(pud) | (_PAGE_PTE | _PAGE_DEVMAP));
+}
+
+struct vmem_altmap;
extern int __meminit radix__vmemmap_create_mapping(unsigned long start,
unsigned long page_size,
unsigned long phys);
+int __meminit radix__vmemmap_populate(unsigned long start, unsigned long end,
+ int node, struct vmem_altmap *altmap);
extern void radix__vmemmap_remove_mapping(unsigned long start,
unsigned long page_size);
@@ -68,6 +68,8 @@ void radix__flush_tlb_pwc_range_psize(struct mm_struct *mm, unsigned long start,
unsigned long end, int psize);
extern void radix__flush_pmd_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end);
+extern void radix__flush_pud_tlb_range(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end);
extern void radix__flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end);
extern void radix__flush_tlb_kernel_range(unsigned long start, unsigned long end);
@@ -50,6 +50,14 @@ static inline void flush_pmd_tlb_range(struct vm_area_struct *vma,
radix__flush_pmd_tlb_range(vma, start, end);
}
+#define __HAVE_ARCH_FLUSH_PUD_TLB_RANGE
+static inline void flush_pud_tlb_range(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end)
+{
+ if (radix_enabled())
+ radix__flush_pud_tlb_range(vma, start, end);
+}
+
#define __HAVE_ARCH_FLUSH_HUGETLB_TLB_RANGE
static inline void flush_hugetlb_tlb_range(struct vm_area_struct *vma,
unsigned long start,
@@ -64,11 +64,39 @@ int pmdp_set_access_flags(struct vm_area_struct *vma, unsigned long address,
return changed;
}
+int pudp_set_access_flags(struct vm_area_struct *vma, unsigned long address,
+ pud_t *pudp, pud_t entry, int dirty)
+{
+ int changed;
+#ifdef CONFIG_DEBUG_VM
+ WARN_ON(!pud_devmap(*pudp));
+ assert_spin_locked(pud_lockptr(vma->vm_mm, pudp));
+#endif
+ changed = !pud_same(*(pudp), entry);
+ if (changed) {
+ /*
+ * We can use MMU_PAGE_1G here, because only radix
+ * path look at the psize.
+ */
+ __ptep_set_access_flags(vma, pudp_ptep(pudp),
+ pud_pte(entry), address, MMU_PAGE_1G);
+ }
+ return changed;
+}
+
+
int pmdp_test_and_clear_young(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp)
{
return __pmdp_test_and_clear_young(vma->vm_mm, address, pmdp);
}
+
+int pudp_test_and_clear_young(struct vm_area_struct *vma,
+ unsigned long address, pud_t *pudp)
+{
+ return __pudp_test_and_clear_young(vma->vm_mm, address, pudp);
+}
+
/*
* set a new huge pmd. We should not be called for updating
* an existing pmd entry. That should go via pmd_hugepage_update.
@@ -90,6 +118,23 @@ void set_pmd_at(struct mm_struct *mm, unsigned long addr,
return set_pte_at(mm, addr, pmdp_ptep(pmdp), pmd_pte(pmd));
}
+void set_pud_at(struct mm_struct *mm, unsigned long addr,
+ pud_t *pudp, pud_t pud)
+{
+#ifdef CONFIG_DEBUG_VM
+ /*
+ * Make sure hardware valid bit is not set. We don't do
+ * tlb flush for this update.
+ */
+
+ WARN_ON(pte_hw_valid(pud_pte(*pudp)));
+ assert_spin_locked(pud_lockptr(mm, pudp));
+ WARN_ON(!(pud_large(pud)));
+#endif
+ trace_hugepage_set_pud(addr, pud_val(pud));
+ return set_pte_at(mm, addr, pudp_ptep(pudp), pud_pte(pud));
+}
+
static void do_serialize(void *arg)
{
/* We've taken the IPI, so try to trim the mask while here */
@@ -147,11 +192,35 @@ pmd_t pmdp_huge_get_and_clear_full(struct vm_area_struct *vma,
return pmd;
}
+pud_t pudp_huge_get_and_clear_full(struct vm_area_struct *vma,
+ unsigned long addr, pud_t *pudp, int full)
+{
+ pud_t pud;
+
+ VM_BUG_ON(addr & ~HPAGE_PMD_MASK);
+ VM_BUG_ON((pud_present(*pudp) && !pud_devmap(*pudp)) ||
+ !pud_present(*pudp));
+ pud = pudp_huge_get_and_clear(vma->vm_mm, addr, pudp);
+ /*
+ * if it not a fullmm flush, then we can possibly end up converting
+ * this PMD pte entry to a regular level 0 PTE by a parallel page fault.
+ * Make sure we flush the tlb in this case.
+ */
+ if (!full)
+ flush_pud_tlb_range(vma, addr, addr + HPAGE_PUD_SIZE);
+ return pud;
+}
+
static pmd_t pmd_set_protbits(pmd_t pmd, pgprot_t pgprot)
{
return __pmd(pmd_val(pmd) | pgprot_val(pgprot));
}
+static pud_t pud_set_protbits(pud_t pud, pgprot_t pgprot)
+{
+ return __pud(pud_val(pud) | pgprot_val(pgprot));
+}
+
/*
* At some point we should be able to get rid of
* pmd_mkhuge() and mk_huge_pmd() when we update all the
@@ -166,6 +235,15 @@ pmd_t pfn_pmd(unsigned long pfn, pgprot_t pgprot)
return __pmd_mkhuge(pmd_set_protbits(__pmd(pmdv), pgprot));
}
+pud_t pfn_pud(unsigned long pfn, pgprot_t pgprot)
+{
+ unsigned long pudv;
+
+ pudv = (pfn << PAGE_SHIFT) & PTE_RPN_MASK;
+
+ return __pud_mkhuge(pud_set_protbits(__pud(pudv), pgprot));
+}
+
pmd_t mk_pmd(struct page *page, pgprot_t pgprot)
{
return pfn_pmd(page_to_pfn(page), pgprot);
@@ -967,6 +967,23 @@ unsigned long radix__pmd_hugepage_update(struct mm_struct *mm, unsigned long add
return old;
}
+unsigned long radix__pud_hugepage_update(struct mm_struct *mm, unsigned long addr,
+ pud_t *pudp, unsigned long clr,
+ unsigned long set)
+{
+ unsigned long old;
+
+#ifdef CONFIG_DEBUG_VM
+ WARN_ON(!pud_devmap(*pudp));
+ assert_spin_locked(pud_lockptr(mm, pudp));
+#endif
+
+ old = radix__pte_update(mm, addr, pudp_ptep(pudp), clr, set, 1);
+ trace_hugepage_update_pud(addr, old, clr, set);
+
+ return old;
+}
+
pmd_t radix__pmdp_collapse_flush(struct vm_area_struct *vma, unsigned long address,
pmd_t *pmdp)
@@ -1043,6 +1060,17 @@ pmd_t radix__pmdp_huge_get_and_clear(struct mm_struct *mm,
return old_pmd;
}
+pud_t radix__pudp_huge_get_and_clear(struct mm_struct *mm,
+ unsigned long addr, pud_t *pudp)
+{
+ pud_t old_pud;
+ unsigned long old;
+
+ old = radix__pud_hugepage_update(mm, addr, pudp, ~0UL, 0);
+ old_pud = __pud(old);
+ return old_pud;
+}
+
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
void radix__ptep_set_access_flags(struct vm_area_struct *vma, pte_t *ptep,
@@ -1461,6 +1461,13 @@ void radix__flush_pmd_tlb_range(struct vm_area_struct *vma,
}
EXPORT_SYMBOL(radix__flush_pmd_tlb_range);
+void radix__flush_pud_tlb_range(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end)
+{
+ radix__flush_tlb_range_psize(vma->vm_mm, start, end, MMU_PAGE_1G);
+}
+EXPORT_SYMBOL(radix__flush_pud_tlb_range);
+
void radix__flush_tlb_all(void)
{
unsigned long rb,prs,r,rs;
@@ -94,6 +94,7 @@ config PPC_BOOK3S_64
select PPC_FPU
select PPC_HAVE_PMU_SUPPORT
select HAVE_ARCH_TRANSPARENT_HUGEPAGE
+ select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
select ARCH_ENABLE_SPLIT_PMD_PTLOCK
select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
@@ -30,6 +30,11 @@ DEFINE_EVENT(hugepage_set, hugepage_set_pmd,
TP_ARGS(addr, pmd)
);
+DEFINE_EVENT(hugepage_set, hugepage_set_pud,
+ TP_PROTO(unsigned long addr, unsigned long pud),
+ TP_ARGS(addr, pud)
+);
+
DECLARE_EVENT_CLASS(hugepage_update,
TP_PROTO(unsigned long addr, unsigned long pte, unsigned long clr, unsigned long set),
@@ -57,6 +62,11 @@ DEFINE_EVENT(hugepage_update, hugepage_update_pmd,
TP_ARGS(addr, pmd, clr, set)
);
+DEFINE_EVENT(hugepage_update, hugepage_update_pud,
+ TP_PROTO(unsigned long addr, unsigned long pud, unsigned long clr, unsigned long set),
+ TP_ARGS(addr, pud, clr, set)
+);
+
DECLARE_EVENT_CLASS(migration_pmd,
TP_PROTO(unsigned long addr, unsigned long pmd),
This is enabled only with radix translation and 1G hugepage size. This will be used with devdax device memory with a namespace alignment of 1G. Anon transparent hugepage is not supported even though we do have helpers checking pud_trans_huge(). We should never find that return true. The only expected pte bit combination is _PAGE_PTE | _PAGE_DEVMAP. Some of the helpers are never expected to get called on hash translation and hence is marked to call BUG() in such a case. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> --- arch/powerpc/include/asm/book3s/64/pgtable.h | 156 ++++++++++++++++-- arch/powerpc/include/asm/book3s/64/radix.h | 36 ++++ .../include/asm/book3s/64/tlbflush-radix.h | 2 + arch/powerpc/include/asm/book3s/64/tlbflush.h | 8 + arch/powerpc/mm/book3s64/pgtable.c | 78 +++++++++ arch/powerpc/mm/book3s64/radix_pgtable.c | 28 ++++ arch/powerpc/mm/book3s64/radix_tlb.c | 7 + arch/powerpc/platforms/Kconfig.cputype | 1 + include/trace/events/thp.h | 10 ++ 9 files changed, 315 insertions(+), 11 deletions(-)