thp: add pmd paravirt ops
Paravirt ops pmd_update/pmd_update_defer/pmd_set_at. Not all might be
necessary (vmware needs pmd_update, Xen needs set_pmd_at, nobody needs
pmd_update_defer), but this is to keep full simmetry with pte paravirt
ops, which looks cleaner and simpler from a common code POV.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 7709c12..2071a8b 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -435,6 +435,11 @@
{
PVOP_VCALL3(pv_mmu_ops.pte_update, mm, addr, ptep);
}
+static inline void pmd_update(struct mm_struct *mm, unsigned long addr,
+ pmd_t *pmdp)
+{
+ PVOP_VCALL3(pv_mmu_ops.pmd_update, mm, addr, pmdp);
+}
static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
pte_t *ptep)
@@ -442,6 +447,12 @@
PVOP_VCALL3(pv_mmu_ops.pte_update_defer, mm, addr, ptep);
}
+static inline void pmd_update_defer(struct mm_struct *mm, unsigned long addr,
+ pmd_t *pmdp)
+{
+ PVOP_VCALL3(pv_mmu_ops.pmd_update_defer, mm, addr, pmdp);
+}
+
static inline pte_t __pte(pteval_t val)
{
pteval_t ret;
@@ -543,6 +554,20 @@
PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pte.pte);
}
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
+ pmd_t *pmdp, pmd_t pmd)
+{
+#if PAGETABLE_LEVELS >= 3
+ if (sizeof(pmdval_t) > sizeof(long))
+ /* 5 arg words */
+ pv_mmu_ops.set_pmd_at(mm, addr, pmdp, pmd);
+ else
+ PVOP_VCALL4(pv_mmu_ops.set_pmd_at, mm, addr, pmdp, pmd.pmd);
+#endif
+}
+#endif
+
static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
{
pmdval_t val = native_pmd_val(pmd);