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iommu/riscv: Empty iommu queue before enabling it
authorXu Lu <luxu.kernel@bytedance.com>
Fri, 3 Jan 2025 09:32:19 +0000 (17:32 +0800)
committerJoerg Roedel <jroedel@suse.de>
Mon, 6 Jan 2025 11:37:19 +0000 (12:37 +0100)
commit8d8d3752c0a4f7fb072352837cbdbf57c02df239
treeaeb2f10f1b12dc6ff9782713ab906f55da9e4975tree
parentd5f88acdd6ff84607043a6845b81e4be148f9fd9commit | diff
iommu/riscv: Empty iommu queue before enabling it

Changing cqen/fqen/pqen from 0 to 1 sets the cqh/fqt/pqt registers to 0.
But the cqt/fqh/pqh registers are left unmodified. This commit resets
cqt/fqh/pqh registers to ensure corresponding queues are empty before
being enabled during initialization.

Signed-off-by: Xu Lu <luxu.kernel@bytedance.com>
Link: https://lore.kernel.org/r/20250103093220.38106-2-luxu.kernel@bytedance.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
drivers/iommu/riscv/iommu.c diff | blob | history
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