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Message-Id: <20240126105341.78086-1-baolu.lu@linux.intel.com>
Date: Fri, 26 Jan 2024 18:53:39 +0800
From: Lu Baolu <baolu.lu@...ux.intel.com>
To: Jason Gunthorpe <jgg@...pe.ca>,
Kevin Tian <kevin.tian@...el.com>,
Joerg Roedel <joro@...tes.org>,
Will Deacon <will@...nel.org>,
Robin Murphy <robin.murphy@....com>
Cc: iommu@...ts.linux.dev,
linux-kernel@...r.kernel.org,
Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH v2 0/2] Use right iommu_ops for mock device
In the iommu probe device path, __iommu_probe_device() gets the iommu_ops
for the device from dev->iommu->fwspec if this field has been initialized
before probing. Otherwise, it will lookup the global iommu device list
and use the iommu_ops of the first iommu device which has no
dev->iommu->fwspec. This causes the wrong iommu_ops to be used for the mock
device on x86 platforms where dev->iommu->fwspec is not used.
Probe the right iommu_ops for device by iterating over all the global
drivers and calling their probe function to find a match.
Change log:
v2:
- Iterate over all the global iommu drivers and calling their probe
function to find a match.
v1: https://lore.kernel.org/linux-iommu/20240111073213.180020-1-baolu.lu@linux.intel.com/
Lu Baolu (2):
iommu: Use mutex instead of spinlock for iommu_device_list
iommu: Probe right iommu_ops for device
drivers/iommu/iommu.c | 98 ++++++++++++++++++++++++++-----------------
1 file changed, 59 insertions(+), 39 deletions(-)
--
2.34.1
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