diff options
| author | Lu Baolu <baolu.lu@linux.intel.com> | 2017-11-03 10:51:33 -0600 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2017-11-03 10:51:33 -0600 |
| commit | 973b546451fdf11e518cc96d1b137af893a38db5 (patch) | |
| tree | cf60bbbf85f1a4dd632669c60119ea382a8decdc | |
| parent | 2e2e35d512798193b4165ed884a5d1d9b181e231 (diff) | |
iommu/vt-d: Clear Page Request Overflow fault bit
Currently Page Request Overflow bit in IOMMU Fault Status register
is not cleared. Not clearing this bit would mean that any future
page-request is going to be automatically dropped by IOMMU.
Suggested-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
| -rw-r--r-- | drivers/iommu/dmar.c | 3 | ||||
| -rw-r--r-- | include/linux/intel-iommu.h | 1 |
2 files changed, 3 insertions, 1 deletions
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 1ea7cd537873..9a7ffd13c7f0 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -1679,7 +1679,8 @@ irqreturn_t dmar_fault(int irq, void *dev_id) raw_spin_lock_irqsave(&iommu->register_lock, flag); } - writel(DMA_FSTS_PFO | DMA_FSTS_PPF, iommu->reg + DMAR_FSTS_REG); + writel(DMA_FSTS_PFO | DMA_FSTS_PPF | DMA_FSTS_PRO, + iommu->reg + DMAR_FSTS_REG); unlock_exit: raw_spin_unlock_irqrestore(&iommu->register_lock, flag); diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 485a5b48f038..f3274d9f46a2 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -212,6 +212,7 @@ #define DMA_FSTS_IQE (1 << 4) #define DMA_FSTS_ICE (1 << 5) #define DMA_FSTS_ITE (1 << 6) +#define DMA_FSTS_PRO (1 << 7) #define dma_fsts_fault_record_index(s) (((s) >> 8) & 0xff) /* FRCD_REG, 32 bits access */ |