From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
commit 9def3b1a07c41e21c68a0eb353e3e569fdd1d2b1 upstream.
Since commit c40aaaac1018 ("iommu/vt-d: Gracefully handle DMAR units
with no supported address widths") dmar.c needs struct iommu_device to
be selected. We can drop this dependency by not dereferencing struct
iommu_device if IOMMU_API is not selected and by reusing the information
stored in iommu->drhd->ignored instead.
This fixes the following build error when IOMMU_API is not selected:
drivers/iommu/dmar.c: In function ‘free_iommu’:
drivers/iommu/dmar.c:1139:41: error: ‘struct iommu_device’ has no member named ‘ops’
1139 | if (intel_iommu_enabled && iommu->iommu.ops) {
^
Fixes: c40aaaac1018 ("iommu/vt-d: Gracefully handle DMAR units with no supported address widths")
Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
Acked-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
Acked-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20201013073055.11262-1-brgl@xxxxxxxx
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
[ - context change due to moving drivers/iommu/dmar.c to
drivers/iommu/intel/dmar.c
- set the drhr in the iommu like in upstream commit b1012ca8dc4f
("iommu/vt-d: Skip TE disabling on quirky gfx dedicated iommu") ]
Signed-off-by: Filippo Sironi <sironi@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iommu/dmar.c | 3 ++-
include/linux/intel-iommu.h | 2 ++
2 files changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -1110,6 +1110,7 @@ static int alloc_iommu(struct dmar_drhd_
}
drhd->iommu = iommu;
+ iommu->drhd = drhd;
return 0;
@@ -1124,7 +1125,7 @@ error:
static void free_iommu(struct intel_iommu *iommu)
{
- if (intel_iommu_enabled && iommu->iommu_dev)
+ if (intel_iommu_enabled && !iommu->drhd->ignored)
iommu_device_destroy(iommu->iommu_dev);
if (iommu->irq) {
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -447,6 +447,8 @@ struct intel_iommu {
struct device *iommu_dev; /* IOMMU-sysfs device */
int node;
u32 flags; /* Software defined flags */
+
+ struct dmar_drhd_unit *drhd;
};
static inline void __iommu_flush_cache(
