From: Jernej Skrabec jernej.skrabec@gmail.com
[ Upstream commit cef20703e2b2276aaa402ec5a65ec9a09963b83e ]
We have to reset masters for all faults - permissions, L1 fault or L2 fault. Currently it's done only for permissions. If other type of fault happens, master is in locked up state. Fix that by really considering all fault sources.
Fixes: 4100b8c229b3 ("iommu: Add Allwinner H6 IOMMU driver") Signed-off-by: Jernej Skrabec jernej.skrabec@gmail.com Link: https://lore.kernel.org/r/20221025165415.307591-3-jernej.skrabec@gmail.com Signed-off-by: Joerg Roedel jroedel@suse.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iommu/sun50i-iommu.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/sun50i-iommu.c b/drivers/iommu/sun50i-iommu.c index c777882d0ec2..38d1069cf383 100644 --- a/drivers/iommu/sun50i-iommu.c +++ b/drivers/iommu/sun50i-iommu.c @@ -869,8 +869,8 @@ static phys_addr_t sun50i_iommu_handle_perm_irq(struct sun50i_iommu *iommu)
static irqreturn_t sun50i_iommu_irq(int irq, void *dev_id) { + u32 status, l1_status, l2_status, resets; struct sun50i_iommu *iommu = dev_id; - u32 status;
spin_lock(&iommu->iommu_lock);
@@ -880,6 +880,9 @@ static irqreturn_t sun50i_iommu_irq(int irq, void *dev_id) return IRQ_NONE; }
+ l1_status = iommu_read(iommu, IOMMU_L1PG_INT_REG); + l2_status = iommu_read(iommu, IOMMU_L2PG_INT_REG); + if (status & IOMMU_INT_INVALID_L2PG) sun50i_iommu_handle_pt_irq(iommu, IOMMU_INT_ERR_ADDR_L2_REG, @@ -893,7 +896,8 @@ static irqreturn_t sun50i_iommu_irq(int irq, void *dev_id)
iommu_write(iommu, IOMMU_INT_CLR_REG, status);
- iommu_write(iommu, IOMMU_RESET_REG, ~status); + resets = (status | l1_status | l2_status) & IOMMU_INT_MASTER_MASK; + iommu_write(iommu, IOMMU_RESET_REG, ~resets); iommu_write(iommu, IOMMU_RESET_REG, IOMMU_RESET_RELEASE_ALL);
spin_unlock(&iommu->iommu_lock);