iommu/vt-d: Access iomem correctly
This fixes wrong accesses to iomem introduced by the kdump
fixing code.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 93f16aa..a85077d 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2799,15 +2799,18 @@
}
static int copy_context_table(struct intel_iommu *iommu,
- struct root_entry *old_re,
+ struct root_entry __iomem *old_re,
struct context_entry **tbl,
int bus, bool ext)
{
- struct context_entry *old_ce = NULL, *new_ce = NULL, ce;
int tbl_idx, pos = 0, idx, devfn, ret = 0, did;
+ struct context_entry __iomem *old_ce = NULL;
+ struct context_entry *new_ce = NULL, ce;
+ struct root_entry re;
phys_addr_t old_ce_phys;
tbl_idx = ext ? bus * 2 : bus;
+ memcpy_fromio(&re, old_re, sizeof(re));
for (devfn = 0; devfn < 256; devfn++) {
/* First calculate the correct index */
@@ -2827,9 +2830,9 @@
ret = 0;
if (devfn < 0x80)
- old_ce_phys = root_entry_lctp(old_re);
+ old_ce_phys = root_entry_lctp(&re);
else
- old_ce_phys = root_entry_uctp(old_re);
+ old_ce_phys = root_entry_uctp(&re);
if (!old_ce_phys) {
if (ext && devfn == 0) {
@@ -2854,7 +2857,7 @@
}
/* Now copy the context entry */
- ce = old_ce[idx];
+ memcpy_fromio(&ce, old_ce + idx, sizeof(ce));
if (!__context_present(&ce))
continue;
@@ -2898,8 +2901,8 @@
static int copy_translation_tables(struct intel_iommu *iommu)
{
+ struct root_entry __iomem *old_rt;
struct context_entry **ctxt_tbls;
- struct root_entry *old_rt;
phys_addr_t old_rt_phys;
int ctxt_table_entries;
unsigned long flags;