From: Bartosz Golaszewski bgolaszewski@baylibre.com
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@baylibre.com Acked-by: Lu Baolu baolu.lu@linux.intel.com Acked-by: David Woodhouse dwmw@amazon.co.uk Link: https://lore.kernel.org/r/20201013073055.11262-1-brgl@bgdev.pl Signed-off-by: Joerg Roedel jroedel@suse.de [ - 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@amazon.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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(