[PATCH v5 28/38] x86: Implement the new page table range API

From: Matthew Wilcox (Oracle)
Date: Mon Jul 10 2023 - 16:45:44 EST


Add PFN_PTE_SHIFT and a noop update_mmu_cache_range().

Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Acked-by: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: x86@xxxxxxxxxx
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
---
arch/x86/include/asm/pgtable.h | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index c6242bc58a71..9818f13bfa09 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -185,6 +185,8 @@ static inline int pte_special(pte_t pte)

static inline u64 protnone_mask(u64 val);

+#define PFN_PTE_SHIFT PAGE_SHIFT
+
static inline unsigned long pte_pfn(pte_t pte)
{
phys_addr_t pfn = pte_val(pte);
@@ -1020,13 +1022,6 @@ static inline pud_t native_local_pudp_get_and_clear(pud_t *pudp)
return res;
}

-static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep, pte_t pte)
-{
- page_table_check_ptes_set(mm, addr, ptep, pte, 1);
- set_pte(ptep, pte);
-}
-
static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, pmd_t pmd)
{
@@ -1292,6 +1287,11 @@ static inline void update_mmu_cache(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep)
{
}
+static inline void update_mmu_cache_range(struct vm_fault *vmf,
+ struct vm_area_struct *vma, unsigned long addr,
+ pte_t *ptep, unsigned int nr)
+{
+}
static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
unsigned long addr, pmd_t *pmd)
{
--
2.39.2