iommu/riscv: Serialize command queue publishing

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Serialize command queue publishing so software producer state advances only
after a command is written and the hardware tail is updated. Wait for
hardware consumption outside the queue lock when the command queue is full
so other CPUs are not blocked behind a long poll.

Fixes: 856c0cfe5c ("iommu/riscv: Command and fault queue support")
Signed-off-by: Fangyu Yu <fangyu.yu@linux.alibaba.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

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Fangyu Yu 2026-09-01 21:39:19 +08:00 • committed by Joerg Roedel

parent d5bcf9ccaa

commit ca58afa409

1 changed files with 58 additions and 42 deletions

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drivers/iommu/riscv/iommu.c

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