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-rw-r--r--arch/arm64/include/asm/memory.h2
-rw-r--r--arch/arm64/include/asm/page.h3
-rw-r--r--arch/arm64/kvm/mmu.c2
-rw-r--r--arch/arm64/mm/init.c12
-rw-r--r--arch/arm64/mm/ioremap.c4
-rw-r--r--arch/arm64/mm/mmu.c2
6 files changed, 19 insertions, 6 deletions
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index 87b90dc27a43..9027b7e16c4c 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -369,7 +369,7 @@ static inline void *phys_to_virt(phys_addr_t x)
#define virt_addr_valid(addr) ({ \
__typeof__(addr) __addr = __tag_reset(addr); \
- __is_lm_address(__addr) && pfn_valid(virt_to_pfn(__addr)); \
+ __is_lm_address(__addr) && pfn_is_map_memory(virt_to_pfn(__addr)); \
})
void dump_mem_limit(void);
diff --git a/arch/arm64/include/asm/page.h b/arch/arm64/include/asm/page.h
index 012cffc574e8..75ddfe671393 100644
--- a/arch/arm64/include/asm/page.h
+++ b/arch/arm64/include/asm/page.h
@@ -37,7 +37,8 @@ void copy_highpage(struct page *to, struct page *from);
typedef struct page *pgtable_t;
-extern int pfn_valid(unsigned long);
+int pfn_valid(unsigned long pfn);
+int pfn_is_map_memory(unsigned long pfn);
#include <asm/memory.h>
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 74b3c1a3ff5a..5e0d40f9fb86 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -85,7 +85,7 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
static bool kvm_is_device_pfn(unsigned long pfn)
{
- return !pfn_valid(pfn);
+ return !pfn_is_map_memory(pfn);
}
static void *stage2_memcache_zalloc_page(void *arg)
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index e55409caaee3..148e752a70f7 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -256,6 +256,18 @@ int pfn_valid(unsigned long pfn)
}
EXPORT_SYMBOL(pfn_valid);
+int pfn_is_map_memory(unsigned long pfn)
+{
+ phys_addr_t addr = PFN_PHYS(pfn);
+
+ /* avoid false positives for bogus PFNs, see comment in pfn_valid() */
+ if (PHYS_PFN(addr) != pfn)
+ return 0;
+
+ return memblock_is_map_memory(addr);
+}
+EXPORT_SYMBOL(pfn_is_map_memory);
+
static phys_addr_t memory_limit = PHYS_ADDR_MAX;
/*
diff --git a/arch/arm64/mm/ioremap.c b/arch/arm64/mm/ioremap.c
index b5e83c46b23e..b7c81dacabf0 100644
--- a/arch/arm64/mm/ioremap.c
+++ b/arch/arm64/mm/ioremap.c
@@ -43,7 +43,7 @@ static void __iomem *__ioremap_caller(phys_addr_t phys_addr, size_t size,
/*
* Don't allow RAM to be mapped.
*/
- if (WARN_ON(pfn_valid(__phys_to_pfn(phys_addr))))
+ if (WARN_ON(pfn_is_map_memory(__phys_to_pfn(phys_addr))))
return NULL;
area = get_vm_area_caller(size, VM_IOREMAP, caller);
@@ -84,7 +84,7 @@ EXPORT_SYMBOL(iounmap);
void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size)
{
/* For normal memory we already have a cacheable mapping. */
- if (pfn_valid(__phys_to_pfn(phys_addr)))
+ if (pfn_is_map_memory(__phys_to_pfn(phys_addr)))
return (void __iomem *)__phys_to_virt(phys_addr);
return __ioremap_caller(phys_addr, size, __pgprot(PROT_NORMAL),
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index add67deb4910..7553a7eab3db 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -82,7 +82,7 @@ void set_swapper_pgd(pgd_t *pgdp, pgd_t pgd)
pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
unsigned long size, pgprot_t vma_prot)
{
- if (!pfn_valid(pfn))
+ if (!pfn_is_map_memory(pfn))
return pgprot_noncached(vma_prot);
else if (file->f_flags & O_SYNC)
return pgprot_writecombine(vma_prot);