linux-kernel - [PATCH v2 13/30] microblaze: Implement the new page table range API

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Message-Id: <20230227175741.71216-14-willy@infradead.org>
Date:   Mon, 27 Feb 2023 17:57:24 +0000
From:   "Matthew Wilcox (Oracle)" <willy@...radead.org>
To:     linux-mm@...ck.org, linux-arch@...r.kernel.org
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        linux-kernel@...r.kernel.org, Michal Simek <monstr@...str.eu>
Subject: [PATCH v2 13/30] microblaze: Implement the new page table range API

Add set_ptes(), update_mmu_cache_range(), flush_icache_pages() and
flush_dcache_folio().  Also change the calling convention for set_pte()
to be the same as other architectures.

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Cc: Michal Simek <monstr@...str.eu>
---
 arch/microblaze/include/asm/cacheflush.h |  8 ++++++++
 arch/microblaze/include/asm/pgtable.h    | 17 ++++++++++++-----
 arch/microblaze/include/asm/tlbflush.h   |  4 +++-
 3 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/arch/microblaze/include/asm/cacheflush.h b/arch/microblaze/include/asm/cacheflush.h
index 39f8fb6768d8..e6641ff98cb3 100644
--- a/arch/microblaze/include/asm/cacheflush.h
+++ b/arch/microblaze/include/asm/cacheflush.h
@@ -74,6 +74,14 @@ do { \
 	flush_dcache_range((unsigned) (addr), (unsigned) (addr) + PAGE_SIZE); \
 } while (0);
 
+static void flush_dcache_folio(struct folio *folio)
+{
+	unsigned long addr = folio_pfn(folio) << PAGE_SHIFT;
+
+	flush_dcache_range(addr, addr + folio_size(folio));
+}
+#define flush_dcache_folio flush_dcache_folio
+
 #define flush_cache_page(vma, vmaddr, pfn) \
 	flush_dcache_range(pfn << PAGE_SHIFT, (pfn << PAGE_SHIFT) + PAGE_SIZE);
 
diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h
index d1b8272abcd9..a01e1369b486 100644
--- a/arch/microblaze/include/asm/pgtable.h
+++ b/arch/microblaze/include/asm/pgtable.h
@@ -330,18 +330,25 @@ static inline unsigned long pte_update(pte_t *p, unsigned long clr,
 /*
  * set_pte stores a linux PTE into the linux page table.
  */
-static inline void set_pte(struct mm_struct *mm, unsigned long addr,
-		pte_t *ptep, pte_t pte)
+static inline void set_pte(pte_t *ptep, pte_t pte)
 {
 	*ptep = pte;
 }
 
-static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
-		pte_t *ptep, pte_t pte)
+static inline void set_ptes(struct mm_struct *mm, unsigned long addr,
+		pte_t *ptep, pte_t pte, unsigned int nr)
 {
-	*ptep = pte;
+	for (;;) {
+		set_pte(ptep, pte);
+		if (--nr == 0)
+			break;
+		ptep++;
+		pte_val(pte) += 1 << PFN_SHIFT_OFFSET;
+	}
 }
 
+#define set_pte_at(mm, addr, ptep, pte) set_ptes(mm, addr, ptep, pte, 1)
+
 #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
 static inline int ptep_test_and_clear_young(struct vm_area_struct *vma,
 		unsigned long address, pte_t *ptep)
diff --git a/arch/microblaze/include/asm/tlbflush.h b/arch/microblaze/include/asm/tlbflush.h
index 2038168ed128..1b179e5e9062 100644
--- a/arch/microblaze/include/asm/tlbflush.h
+++ b/arch/microblaze/include/asm/tlbflush.h
@@ -33,7 +33,9 @@ static inline void local_flush_tlb_range(struct vm_area_struct *vma,
 
 #define flush_tlb_kernel_range(start, end)	do { } while (0)
 
-#define update_mmu_cache(vma, addr, ptep)	do { } while (0)
+#define update_mmu_cache_range(vma, addr, ptep, nr)	do { } while (0)
+#define update_mmu_cache(vma, addr, pte) \
+	update_mmu_cache_range(vma, addr, ptep, 1)
 
 #define flush_tlb_all local_flush_tlb_all
 #define flush_tlb_mm local_flush_tlb_mm
-- 
2.39.1