linux-kernel - [PATCH v6 16/38] microblaze: Implement the new page table range API

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Message-Id: <20230802151406.3735276-17-willy@infradead.org>
Date:   Wed,  2 Aug 2023 16:13:44 +0100
From:   "Matthew Wilcox (Oracle)" <willy@...radead.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        linux-arch@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Mike Rapoport <rppt@...nel.org>,
        Michal Simek <monstr@...str.eu>
Subject: [PATCH v6 16/38] microblaze: Implement the new page table range API

Rename PFN_SHIFT_OFFSET to PTE_PFN_SHIFT.  Change the calling
convention for set_pte() to be the same as other architectures.  Add
update_mmu_cache_range(), flush_icache_pages() and flush_dcache_folio().

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Acked-by: Mike Rapoport (IBM) <rppt@...nel.org>
Cc: Michal Simek <monstr@...str.eu>
---
 arch/microblaze/include/asm/cacheflush.h |  8 ++++++++
 arch/microblaze/include/asm/pgtable.h    | 15 ++++-----------
 arch/microblaze/include/asm/tlbflush.h   |  4 +++-
 3 files changed, 15 insertions(+), 12 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..6f9b99082518 100644
--- a/arch/microblaze/include/asm/pgtable.h
+++ b/arch/microblaze/include/asm/pgtable.h
@@ -230,12 +230,12 @@ extern unsigned long empty_zero_page[1024];
 
 #define pte_page(x)		(mem_map + (unsigned long) \
 				((pte_val(x) - memory_start) >> PAGE_SHIFT))
-#define PFN_SHIFT_OFFSET	(PAGE_SHIFT)
+#define PFN_PTE_SHIFT		PAGE_SHIFT
 
-#define pte_pfn(x)		(pte_val(x) >> PFN_SHIFT_OFFSET)
+#define pte_pfn(x)		(pte_val(x) >> PFN_PTE_SHIFT)
 
 #define pfn_pte(pfn, prot) \
-	__pte(((pte_basic_t)(pfn) << PFN_SHIFT_OFFSET) | pgprot_val(prot))
+	__pte(((pte_basic_t)(pfn) << PFN_PTE_SHIFT) | pgprot_val(prot))
 
 #ifndef __ASSEMBLY__
 /*
@@ -330,14 +330,7 @@ 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)
-{
-	*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_pte(pte_t *ptep, pte_t pte)
 {
 	*ptep = pte;
 }
diff --git a/arch/microblaze/include/asm/tlbflush.h b/arch/microblaze/include/asm/tlbflush.h
index 2038168ed128..a31ae9d44083 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(vmf, vma, addr, ptep, nr) do { } while (0)
+#define update_mmu_cache(vma, addr, pte) \
+	update_mmu_cache_range(NULL, vma, addr, ptep, 1)
 
 #define flush_tlb_all local_flush_tlb_all
 #define flush_tlb_mm local_flush_tlb_mm
-- 
2.40.1