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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 16/24] xen/arm: mm: Use typesafe mfn for xenheap_mfn_*
Add more safety when using xenheap_mfn_*.
Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
---
xen/arch/arm/mm.c | 16 ++++++++--------
xen/arch/arm/setup.c | 18 +++++++++---------
xen/include/asm-arm/mm.h | 11 ++++++-----
3 files changed, 23 insertions(+), 22 deletions(-)
diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c
index 0014c24ecc..fb01f01879 100644
--- a/xen/arch/arm/mm.c
+++ b/xen/arch/arm/mm.c
@@ -138,8 +138,8 @@ uint64_t init_ttbr;
static paddr_t phys_offset;
/* Limits of the Xen heap */
-unsigned long xenheap_mfn_start __read_mostly = ~0UL;
-unsigned long xenheap_mfn_end __read_mostly;
+mfn_t xenheap_mfn_start __read_mostly = INVALID_MFN;
+mfn_t xenheap_mfn_end __read_mostly;
vaddr_t xenheap_virt_end __read_mostly;
#ifdef CONFIG_ARM_64
vaddr_t xenheap_virt_start __read_mostly;
@@ -801,8 +801,8 @@ void __init setup_xenheap_mappings(unsigned long base_mfn,
/* Record where the xenheap is, for translation routines. */
xenheap_virt_end = XENHEAP_VIRT_START + nr_mfns * PAGE_SIZE;
- xenheap_mfn_start = base_mfn;
- xenheap_mfn_end = base_mfn + nr_mfns;
+ xenheap_mfn_start = _mfn(base_mfn);
+ xenheap_mfn_end = _mfn(base_mfn + nr_mfns);
}
#else /* CONFIG_ARM_64 */
void __init setup_xenheap_mappings(unsigned long base_mfn,
@@ -816,16 +816,16 @@ void __init setup_xenheap_mappings(unsigned long base_mfn,
mfn = base_mfn & ~((FIRST_SIZE>>PAGE_SHIFT)-1);
/* First call sets the xenheap physical and virtual offset. */
- if ( xenheap_mfn_start == ~0UL )
+ if ( mfn_eq(xenheap_mfn_start, INVALID_MFN) )
{
- xenheap_mfn_start = base_mfn;
+ xenheap_mfn_start = _mfn(base_mfn);
xenheap_virt_start = DIRECTMAP_VIRT_START +
(base_mfn - mfn) * PAGE_SIZE;
}
- if ( base_mfn < xenheap_mfn_start )
+ if ( base_mfn < mfn_x(xenheap_mfn_start) )
panic("cannot add xenheap mapping at %lx below heap start %lx",
- base_mfn, xenheap_mfn_start);
+ base_mfn, mfn_x(xenheap_mfn_start));
end_mfn = base_mfn + nr_mfns;
diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index ab4d8e4218..3b34855668 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -555,8 +555,8 @@ static void __init setup_mm(unsigned long dtb_paddr, size_t
dtb_size)
* and enough mapped pages for copying the DTB.
*/
dtb_pages = (dtb_size + PAGE_SIZE-1) >> PAGE_SHIFT;
- boot_mfn_start = xenheap_mfn_end - dtb_pages - 1;
- boot_mfn_end = xenheap_mfn_end;
+ boot_mfn_start = mfn_x(xenheap_mfn_end) - dtb_pages - 1;
+ boot_mfn_end = mfn_x(xenheap_mfn_end);
init_boot_pages(pfn_to_paddr(boot_mfn_start), pfn_to_paddr(boot_mfn_end));
@@ -591,11 +591,11 @@ static void __init setup_mm(unsigned long dtb_paddr,
size_t dtb_size)
e = bank_end;
/* Avoid the xenheap */
- if ( s < pfn_to_paddr(xenheap_mfn_start+xenheap_pages)
- && pfn_to_paddr(xenheap_mfn_start) < e )
+ if ( s < mfn_to_maddr(mfn_add(xenheap_mfn_start, xenheap_pages))
+ && mfn_to_maddr(xenheap_mfn_start) < e )
{
- e = pfn_to_paddr(xenheap_mfn_start);
- n = pfn_to_paddr(xenheap_mfn_start+xenheap_pages);
+ e = mfn_to_maddr(xenheap_mfn_start);
+ n = mfn_to_maddr(mfn_add(xenheap_mfn_start, xenheap_pages));
}
dt_unreserved_regions(s, e, init_boot_pages, 0);
@@ -610,7 +610,7 @@ static void __init setup_mm(unsigned long dtb_paddr, size_t
dtb_size)
/* Add xenheap memory that was not already added to the boot
allocator. */
- init_xenheap_pages(pfn_to_paddr(xenheap_mfn_start),
+ init_xenheap_pages(mfn_to_maddr(xenheap_mfn_start),
pfn_to_paddr(boot_mfn_start));
}
#else /* CONFIG_ARM_64 */
@@ -662,8 +662,8 @@ static void __init setup_mm(unsigned long dtb_paddr, size_t
dtb_size)
total_pages += ram_size >> PAGE_SHIFT;
xenheap_virt_end = XENHEAP_VIRT_START + ram_end - ram_start;
- xenheap_mfn_start = ram_start >> PAGE_SHIFT;
- xenheap_mfn_end = ram_end >> PAGE_SHIFT;
+ xenheap_mfn_start = maddr_to_mfn(ram_start);
+ xenheap_mfn_end = maddr_to_mfn(ram_end);
/*
* Need enough mapped pages for copying the DTB.
diff --git a/xen/include/asm-arm/mm.h b/xen/include/asm-arm/mm.h
index a42da20f0a..3dab6dc9a1 100644
--- a/xen/include/asm-arm/mm.h
+++ b/xen/include/asm-arm/mm.h
@@ -115,7 +115,7 @@ struct page_info
#define PGC_count_width PG_shift(9)
#define PGC_count_mask ((1UL<<PGC_count_width)-1)
-extern unsigned long xenheap_mfn_start, xenheap_mfn_end;
+extern mfn_t xenheap_mfn_start, xenheap_mfn_end;
extern vaddr_t xenheap_virt_end;
#ifdef CONFIG_ARM_64
extern vaddr_t xenheap_virt_start;
@@ -125,7 +125,8 @@ extern vaddr_t xenheap_virt_start;
#define is_xen_heap_page(page) is_xen_heap_mfn(page_to_mfn(page))
#define is_xen_heap_mfn(mfn) ({ \
unsigned long _mfn = (mfn); \
- (_mfn >= xenheap_mfn_start && _mfn < xenheap_mfn_end); \
+ (_mfn >= mfn_x(xenheap_mfn_start) && \
+ _mfn < mfn_x(xenheap_mfn_end)); \
})
#else
#define is_xen_heap_page(page) ((page)->count_info & PGC_xen_heap)
@@ -235,7 +236,7 @@ static inline paddr_t __virt_to_maddr(vaddr_t va)
static inline void *maddr_to_virt(paddr_t ma)
{
ASSERT(is_xen_heap_mfn(ma >> PAGE_SHIFT));
- ma -= pfn_to_paddr(xenheap_mfn_start);
+ ma -= mfn_to_maddr(xenheap_mfn_start);
return (void *)(unsigned long) ma + XENHEAP_VIRT_START;
}
#else
@@ -243,7 +244,7 @@ static inline void *maddr_to_virt(paddr_t ma)
{
ASSERT(pfn_to_pdx(ma >> PAGE_SHIFT) < (DIRECTMAP_SIZE >> PAGE_SHIFT));
return (void *)(XENHEAP_VIRT_START -
- pfn_to_paddr(xenheap_mfn_start) +
+ mfn_to_maddr(xenheap_mfn_start) +
((ma & ma_va_bottom_mask) |
((ma & ma_top_mask) >> pfn_pdx_hole_shift)));
}
@@ -284,7 +285,7 @@ static inline struct page_info *virt_to_page(const void *v)
ASSERT(va < xenheap_virt_end);
pdx = (va - XENHEAP_VIRT_START) >> PAGE_SHIFT;
- pdx += pfn_to_pdx(xenheap_mfn_start);
+ pdx += pfn_to_pdx(mfn_x(xenheap_mfn_start));
return frame_table + pdx - frametable_base_pdx;
}
--
2.11.0
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