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-rw-r--r--arch/arm/include/asm/xen/page.h23
-rw-r--r--arch/arm/xen/mm.c4
-rw-r--r--arch/x86/include/asm/xen/page.h8
-rw-r--r--drivers/xen/biomerge.c6
-rw-r--r--drivers/xen/swiotlb-xen.c16
5 files changed, 40 insertions, 17 deletions
diff --git a/arch/arm/include/asm/xen/page.h b/arch/arm/include/asm/xen/page.h
index 98b1084f8282..5f76a9e7ef1b 100644
--- a/arch/arm/include/asm/xen/page.h
+++ b/arch/arm/include/asm/xen/page.h
@@ -52,7 +52,26 @@ static inline unsigned long mfn_to_pfn(unsigned long mfn)
return mfn;
}
-#define mfn_to_local_pfn(mfn) mfn_to_pfn(mfn)
+/* Pseudo-physical <-> BUS conversion */
+static inline unsigned long pfn_to_bfn(unsigned long pfn)
+{
+ unsigned long mfn;
+
+ if (phys_to_mach.rb_node != NULL) {
+ mfn = __pfn_to_mfn(pfn);
+ if (mfn != INVALID_P2M_ENTRY)
+ return mfn;
+ }
+
+ return pfn;
+}
+
+static inline unsigned long bfn_to_pfn(unsigned long bfn)
+{
+ return bfn;
+}
+
+#define bfn_to_local_pfn(bfn) bfn_to_pfn(bfn)
/* VIRT <-> MACHINE conversion */
#define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v)))
@@ -96,7 +115,7 @@ static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
bool xen_arch_need_swiotlb(struct device *dev,
unsigned long pfn,
- unsigned long mfn);
+ unsigned long bfn);
unsigned long xen_get_swiotlb_free_pages(unsigned int order);
#endif /* _ASM_ARM_XEN_PAGE_H */
diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c
index 03e75fef15b8..6dd911d1f0ac 100644
--- a/arch/arm/xen/mm.c
+++ b/arch/arm/xen/mm.c
@@ -139,9 +139,9 @@ void __xen_dma_sync_single_for_device(struct device *hwdev,
bool xen_arch_need_swiotlb(struct device *dev,
unsigned long pfn,
- unsigned long mfn)
+ unsigned long bfn)
{
- return (!hypercall_cflush && (pfn != mfn) && !is_device_dma_coherent(dev));
+ return (!hypercall_cflush && (pfn != bfn) && !is_device_dma_coherent(dev));
}
int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
diff --git a/arch/x86/include/asm/xen/page.h b/arch/x86/include/asm/xen/page.h
index a3804fbe1f36..724bffbde54d 100644
--- a/arch/x86/include/asm/xen/page.h
+++ b/arch/x86/include/asm/xen/page.h
@@ -176,6 +176,10 @@ static inline xpaddr_t machine_to_phys(xmaddr_t machine)
return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine.maddr))) | offset);
}
+/* Pseudo-physical <-> Bus conversion */
+#define pfn_to_bfn(pfn) pfn_to_mfn(pfn)
+#define bfn_to_pfn(bfn) mfn_to_pfn(bfn)
+
/*
* We detect special mappings in one of two ways:
* 1. If the MFN is an I/O page then Xen will set the m2p entry
@@ -196,7 +200,7 @@ static inline xpaddr_t machine_to_phys(xmaddr_t machine)
* require. In all the cases we care about, the FOREIGN_FRAME bit is
* masked (e.g., pfn_to_mfn()) so behaviour there is correct.
*/
-static inline unsigned long mfn_to_local_pfn(unsigned long mfn)
+static inline unsigned long bfn_to_local_pfn(unsigned long mfn)
{
unsigned long pfn;
@@ -262,7 +266,7 @@ void make_lowmem_page_readwrite(void *vaddr);
static inline bool xen_arch_need_swiotlb(struct device *dev,
unsigned long pfn,
- unsigned long mfn)
+ unsigned long bfn)
{
return false;
}
diff --git a/drivers/xen/biomerge.c b/drivers/xen/biomerge.c
index 0edb91c0de6b..8ae2fc90e1ea 100644
--- a/drivers/xen/biomerge.c
+++ b/drivers/xen/biomerge.c
@@ -6,10 +6,10 @@
bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
const struct bio_vec *vec2)
{
- unsigned long mfn1 = pfn_to_mfn(page_to_pfn(vec1->bv_page));
- unsigned long mfn2 = pfn_to_mfn(page_to_pfn(vec2->bv_page));
+ unsigned long bfn1 = pfn_to_bfn(page_to_pfn(vec1->bv_page));
+ unsigned long bfn2 = pfn_to_bfn(page_to_pfn(vec2->bv_page));
return __BIOVEC_PHYS_MERGEABLE(vec1, vec2) &&
- ((mfn1 == mfn2) || ((mfn1+1) == mfn2));
+ ((bfn1 == bfn2) || ((bfn1+1) == bfn2));
}
EXPORT_SYMBOL(xen_biovec_phys_mergeable);
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 4c549323c605..d757a3e610c6 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -82,8 +82,8 @@ static u64 start_dma_addr;
*/
static inline dma_addr_t xen_phys_to_bus(phys_addr_t paddr)
{
- unsigned long mfn = pfn_to_mfn(PFN_DOWN(paddr));
- dma_addr_t dma = (dma_addr_t)mfn << PAGE_SHIFT;
+ unsigned long bfn = pfn_to_bfn(PFN_DOWN(paddr));
+ dma_addr_t dma = (dma_addr_t)bfn << PAGE_SHIFT;
dma |= paddr & ~PAGE_MASK;
@@ -92,7 +92,7 @@ static inline dma_addr_t xen_phys_to_bus(phys_addr_t paddr)
static inline phys_addr_t xen_bus_to_phys(dma_addr_t baddr)
{
- unsigned long pfn = mfn_to_pfn(PFN_DOWN(baddr));
+ unsigned long pfn = bfn_to_pfn(PFN_DOWN(baddr));
dma_addr_t dma = (dma_addr_t)pfn << PAGE_SHIFT;
phys_addr_t paddr = dma;
@@ -110,15 +110,15 @@ static int check_pages_physically_contiguous(unsigned long pfn,
unsigned int offset,
size_t length)
{
- unsigned long next_mfn;
+ unsigned long next_bfn;
int i;
int nr_pages;
- next_mfn = pfn_to_mfn(pfn);
+ next_bfn = pfn_to_bfn(pfn);
nr_pages = (offset + length + PAGE_SIZE-1) >> PAGE_SHIFT;
for (i = 1; i < nr_pages; i++) {
- if (pfn_to_mfn(++pfn) != ++next_mfn)
+ if (pfn_to_bfn(++pfn) != ++next_bfn)
return 0;
}
return 1;
@@ -138,8 +138,8 @@ static inline int range_straddles_page_boundary(phys_addr_t p, size_t size)
static int is_xen_swiotlb_buffer(dma_addr_t dma_addr)
{
- unsigned long mfn = PFN_DOWN(dma_addr);
- unsigned long pfn = mfn_to_local_pfn(mfn);
+ unsigned long bfn = PFN_DOWN(dma_addr);
+ unsigned long pfn = bfn_to_local_pfn(bfn);
phys_addr_t paddr;
/* If the address is outside our domain, it CAN