summaryrefslogtreecommitdiff
path: root/arch/csky
diff options
context:
space:
mode:
authorMatthew Wilcox (Oracle) <willy@infradead.org>2023-08-02 18:13:39 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-08-25 02:20:20 +0300
commite724e7aaf9ca794670a4d4931af7a7e24e37fec3 (patch)
tree5ca7a1d16815af39263ddb30a51ae70a4308110b /arch/csky
parent4a169d61c2ede9fdf27103e1f454d4a0401d9025 (diff)
downloadlinux-e724e7aaf9ca794670a4d4931af7a7e24e37fec3.tar.xz
csky: implement the new page table range API
Add PFN_PTE_SHIFT, update_mmu_cache_range() and flush_dcache_folio(). Change the PG_dcache_clean flag from being per-page to per-folio. Link: https://lkml.kernel.org/r/20230802151406.3735276-12-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Guo Ren <guoren@kernel.org> Acked-by: Mike Rapoport (IBM) <rppt@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/csky')
-rw-r--r--arch/csky/abiv1/cacheflush.c32
-rw-r--r--arch/csky/abiv1/inc/abi/cacheflush.h2
-rw-r--r--arch/csky/abiv2/cacheflush.c32
-rw-r--r--arch/csky/abiv2/inc/abi/cacheflush.h10
-rw-r--r--arch/csky/include/asm/pgtable.h8
5 files changed, 50 insertions, 34 deletions
diff --git a/arch/csky/abiv1/cacheflush.c b/arch/csky/abiv1/cacheflush.c
index 94fbc03cbe70..171e8fb32285 100644
--- a/arch/csky/abiv1/cacheflush.c
+++ b/arch/csky/abiv1/cacheflush.c
@@ -15,45 +15,51 @@
#define PG_dcache_clean PG_arch_1
-void flush_dcache_page(struct page *page)
+void flush_dcache_folio(struct folio *folio)
{
struct address_space *mapping;
- if (page == ZERO_PAGE(0))
+ if (is_zero_pfn(folio_pfn(folio)))
return;
- mapping = page_mapping_file(page);
+ mapping = folio_flush_mapping(folio);
- if (mapping && !page_mapcount(page))
- clear_bit(PG_dcache_clean, &page->flags);
+ if (mapping && !folio_mapped(folio))
+ clear_bit(PG_dcache_clean, &folio->flags);
else {
dcache_wbinv_all();
if (mapping)
icache_inv_all();
- set_bit(PG_dcache_clean, &page->flags);
+ set_bit(PG_dcache_clean, &folio->flags);
}
}
+EXPORT_SYMBOL(flush_dcache_folio);
+
+void flush_dcache_page(struct page *page)
+{
+ flush_dcache_folio(page_folio(page));
+}
EXPORT_SYMBOL(flush_dcache_page);
-void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
- pte_t *ptep)
+void update_mmu_cache_range(struct vm_fault *vmf, struct vm_area_struct *vma,
+ unsigned long addr, pte_t *ptep, unsigned int nr)
{
unsigned long pfn = pte_pfn(*ptep);
- struct page *page;
+ struct folio *folio;
flush_tlb_page(vma, addr);
if (!pfn_valid(pfn))
return;
- page = pfn_to_page(pfn);
- if (page == ZERO_PAGE(0))
+ if (is_zero_pfn(pfn))
return;
- if (!test_and_set_bit(PG_dcache_clean, &page->flags))
+ folio = page_folio(pfn_to_page(pfn));
+ if (!test_and_set_bit(PG_dcache_clean, &folio->flags))
dcache_wbinv_all();
- if (page_mapping_file(page)) {
+ if (folio_flush_mapping(folio)) {
if (vma->vm_flags & VM_EXEC)
icache_inv_all();
}
diff --git a/arch/csky/abiv1/inc/abi/cacheflush.h b/arch/csky/abiv1/inc/abi/cacheflush.h
index ed62e2066ba7..0d6cb65624c4 100644
--- a/arch/csky/abiv1/inc/abi/cacheflush.h
+++ b/arch/csky/abiv1/inc/abi/cacheflush.h
@@ -9,6 +9,8 @@
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
extern void flush_dcache_page(struct page *);
+void flush_dcache_folio(struct folio *);
+#define flush_dcache_folio flush_dcache_folio
#define flush_cache_mm(mm) dcache_wbinv_all()
#define flush_cache_page(vma, page, pfn) cache_wbinv_all()
diff --git a/arch/csky/abiv2/cacheflush.c b/arch/csky/abiv2/cacheflush.c
index 9923cd24db58..d05a551af5d5 100644
--- a/arch/csky/abiv2/cacheflush.c
+++ b/arch/csky/abiv2/cacheflush.c
@@ -7,32 +7,32 @@
#include <asm/cache.h>
#include <asm/tlbflush.h>
-void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
- pte_t *pte)
+void update_mmu_cache_range(struct vm_fault *vmf, struct vm_area_struct *vma,
+ unsigned long address, pte_t *pte, unsigned int nr)
{
- unsigned long addr;
- struct page *page;
+ unsigned long pfn = pte_pfn(*pte);
+ struct folio *folio;
+ unsigned int i;
flush_tlb_page(vma, address);
- if (!pfn_valid(pte_pfn(*pte)))
+ if (!pfn_valid(pfn))
return;
- page = pfn_to_page(pte_pfn(*pte));
- if (page == ZERO_PAGE(0))
- return;
+ folio = page_folio(pfn_to_page(pfn));
- if (test_and_set_bit(PG_dcache_clean, &page->flags))
+ if (test_and_set_bit(PG_dcache_clean, &folio->flags))
return;
- addr = (unsigned long) kmap_atomic(page);
-
- dcache_wb_range(addr, addr + PAGE_SIZE);
+ for (i = 0; i < folio_nr_pages(folio); i++) {
+ unsigned long addr = (unsigned long) kmap_local_folio(folio,
+ i * PAGE_SIZE);
- if (vma->vm_flags & VM_EXEC)
- icache_inv_range(addr, addr + PAGE_SIZE);
-
- kunmap_atomic((void *) addr);
+ dcache_wb_range(addr, addr + PAGE_SIZE);
+ if (vma->vm_flags & VM_EXEC)
+ icache_inv_range(addr, addr + PAGE_SIZE);
+ kunmap_local((void *) addr);
+ }
}
void flush_icache_deferred(struct mm_struct *mm)
diff --git a/arch/csky/abiv2/inc/abi/cacheflush.h b/arch/csky/abiv2/inc/abi/cacheflush.h
index a565e00c3f70..9c728933a776 100644
--- a/arch/csky/abiv2/inc/abi/cacheflush.h
+++ b/arch/csky/abiv2/inc/abi/cacheflush.h
@@ -18,11 +18,17 @@
#define PG_dcache_clean PG_arch_1
+static inline void flush_dcache_folio(struct folio *folio)
+{
+ if (test_bit(PG_dcache_clean, &folio->flags))
+ clear_bit(PG_dcache_clean, &folio->flags);
+}
+#define flush_dcache_folio flush_dcache_folio
+
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
static inline void flush_dcache_page(struct page *page)
{
- if (test_bit(PG_dcache_clean, &page->flags))
- clear_bit(PG_dcache_clean, &page->flags);
+ flush_dcache_folio(page_folio(page));
}
#define flush_dcache_mmap_lock(mapping) do { } while (0)
diff --git a/arch/csky/include/asm/pgtable.h b/arch/csky/include/asm/pgtable.h
index d4042495febc..42405037c871 100644
--- a/arch/csky/include/asm/pgtable.h
+++ b/arch/csky/include/asm/pgtable.h
@@ -28,6 +28,7 @@
#define pgd_ERROR(e) \
pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
+#define PFN_PTE_SHIFT PAGE_SHIFT
#define pmd_pfn(pmd) (pmd_phys(pmd) >> PAGE_SHIFT)
#define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
#define pte_clear(mm, addr, ptep) set_pte((ptep), \
@@ -90,7 +91,6 @@ static inline void set_pte(pte_t *p, pte_t pte)
/* prevent out of order excution */
smp_mb();
}
-#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
static inline pte_t *pmd_page_vaddr(pmd_t pmd)
{
@@ -263,8 +263,10 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
extern void paging_init(void);
-void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
- pte_t *pte);
+void update_mmu_cache_range(struct vm_fault *vmf, struct vm_area_struct *vma,
+ unsigned long address, pte_t *pte, unsigned int nr);
+#define update_mmu_cache(vma, addr, ptep) \
+ update_mmu_cache_range(NULL, vma, addr, ptep, 1)
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
remap_pfn_range(vma, vaddr, pfn, size, prot)