Commit f68c7f539b6e9 ("iommu/vt-d: Enable write protect for supervisor
SVM") added pasid_enable_wpe() which hit below compile error with !X86.
../drivers/iommu/intel/pasid.c: In function 'pasid_enable_wpe':
../drivers/iommu/intel/pasid.c:554:22: error: implicit declaration of function
'read_cr0' [-Werror=implicit-function-declaration]
554 | unsigned long cr0 = read_cr0();
| ^~~~~~~~
In file included from ../include/linux/build_bug.h:5,
from ../include/linux/bits.h:22,
from ../include/linux/bitops.h:6,
from ../drivers/iommu/intel/pasid.c:12:
../drivers/iommu/intel/pasid.c:557:23: error: 'X86_CR0_WP' undeclared (first
use in this function)
557 | if (unlikely(!(cr0 & X86_CR0_WP))) {
| ^~~~~~~~~~
../include/linux/compiler.h:78:42: note: in definition of macro 'unlikely'
78 | # define unlikely(x) __builtin_expect(!!(x), 0)
| ^
../drivers/iommu/intel/pasid.c:557:23: note: each undeclared identifier is
reported only once for each function it appears in
557 | if (unlikely(!(cr0 & X86_CR0_WP))) {
| ^~~~~~~~~~
../include/linux/compiler.h:78:42: note: in definition of macro 'unlikely'
78 | # define unlikely(x) __builtin_expect(!!(x), 0)
|
Add the missing dependency.
Cc: Sanjay Kumar <sanjay.k.ku...@intel.com>
Cc: Jacob Pan <jacob.jun....@linux.intel.com>
Cc: Randy Dunlap <rdun...@infradead.org>
Reported-by: kernel test robot <l...@intel.com>
Reported-by: Randy Dunlap <rdun...@infradead.org>
Fixes: f68c7f539b6e9 ("iommu/vt-d: Enable write protect for supervisor SVM")
Signed-off-by: Lu Baolu <baolu...@linux.intel.com>
---
drivers/iommu/intel/pasid.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c
index 477b2e1d303c..72646bafc52f 100644
--- a/drivers/iommu/intel/pasid.c
+++ b/drivers/iommu/intel/pasid.c
@@ -551,6 +551,7 @@ static void pasid_flush_caches(struct intel_iommu *iommu,
static inline int pasid_enable_wpe(struct pasid_entry *pte)
{
+#ifdef CONFIG_X86
unsigned long cr0 = read_cr0();
/* CR0.WP is normally set but just to be sure */
@@ -558,6 +559,7 @@ static inline int pasid_enable_wpe(struct pasid_entry *pte)
pr_err_ratelimited("No CPU write protect!\n");
return -EINVAL;
}
+#endif
pasid_set_wpe(pte);
return 0;
--
2.25.1
