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path: root/drivers/vfio/pci/vfio_pci_rdwr.c
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Diffstat (limited to 'drivers/vfio/pci/vfio_pci_rdwr.c')
-rw-r--r--drivers/vfio/pci/vfio_pci_rdwr.c34
1 files changed, 26 insertions, 8 deletions
diff --git a/drivers/vfio/pci/vfio_pci_rdwr.c b/drivers/vfio/pci/vfio_pci_rdwr.c
index 5f2b376dcebd..925419e0f459 100644
--- a/drivers/vfio/pci/vfio_pci_rdwr.c
+++ b/drivers/vfio/pci/vfio_pci_rdwr.c
@@ -21,6 +21,24 @@
#include "vfio_pci_private.h"
+#ifdef __LITTLE_ENDIAN
+#define vfio_ioread64 ioread64
+#define vfio_iowrite64 iowrite64
+#define vfio_ioread32 ioread32
+#define vfio_iowrite32 iowrite32
+#define vfio_ioread16 ioread16
+#define vfio_iowrite16 iowrite16
+#else
+#define vfio_ioread64 ioread64be
+#define vfio_iowrite64 iowrite64be
+#define vfio_ioread32 ioread32be
+#define vfio_iowrite32 iowrite32be
+#define vfio_ioread16 ioread16be
+#define vfio_iowrite16 iowrite16be
+#endif
+#define vfio_ioread8 ioread8
+#define vfio_iowrite8 iowrite8
+
/*
* Read or write from an __iomem region (MMIO or I/O port) with an excluded
* range which is inaccessible. The excluded range drops writes and fills
@@ -44,15 +62,15 @@ static ssize_t do_io_rw(void __iomem *io, char __user *buf,
fillable = 0;
if (fillable >= 4 && !(off % 4)) {
- __le32 val;
+ u32 val;
if (iswrite) {
if (copy_from_user(&val, buf, 4))
return -EFAULT;
- iowrite32(le32_to_cpu(val), io + off);
+ vfio_iowrite32(val, io + off);
} else {
- val = cpu_to_le32(ioread32(io + off));
+ val = vfio_ioread32(io + off);
if (copy_to_user(buf, &val, 4))
return -EFAULT;
@@ -60,15 +78,15 @@ static ssize_t do_io_rw(void __iomem *io, char __user *buf,
filled = 4;
} else if (fillable >= 2 && !(off % 2)) {
- __le16 val;
+ u16 val;
if (iswrite) {
if (copy_from_user(&val, buf, 2))
return -EFAULT;
- iowrite16(le16_to_cpu(val), io + off);
+ vfio_iowrite16(val, io + off);
} else {
- val = cpu_to_le16(ioread16(io + off));
+ val = vfio_ioread16(io + off);
if (copy_to_user(buf, &val, 2))
return -EFAULT;
@@ -82,9 +100,9 @@ static ssize_t do_io_rw(void __iomem *io, char __user *buf,
if (copy_from_user(&val, buf, 1))
return -EFAULT;
- iowrite8(val, io + off);
+ vfio_iowrite8(val, io + off);
} else {
- val = ioread8(io + off);
+ val = vfio_ioread8(io + off);
if (copy_to_user(buf, &val, 1))
return -EFAULT;