From: Baolu Lu <baolu.lu@linux.intel.com>
To: Jason Gunthorpe <jgg@ziepe.ca>
Cc: baolu.lu@linux.intel.com, Joerg Roedel <joro@8bytes.org>,
Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Kevin Tian <kevin.tian@intel.com>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
Nicolin Chen <nicolinc@nvidia.com>, Yi Liu <yi.l.liu@intel.com>,
Jacob Pan <jacob.jun.pan@linux.intel.com>,
Longfang Liu <liulongfang@huawei.com>,
Yan Zhao <yan.y.zhao@intel.com>,
iommu@lists.linux.dev, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v8 12/12] iommu: Use refcount for fault data access
Date: Wed, 13 Dec 2023 10:14:00 +0800 [thread overview]
Message-ID: <6334aaf3-ed7c-4ded-827d-423b861a0b28@linux.intel.com> (raw)
In-Reply-To: <20231212151447.GC3013885@ziepe.ca>
On 12/12/23 11:14 PM, Jason Gunthorpe wrote:
> On Tue, Dec 12, 2023 at 01:17:47PM +0800, Baolu Lu wrote:
>> On 12/11/23 11:24 PM, Jason Gunthorpe wrote:
>>> Also iopf_queue_remove_device() is messed up - it returns an error
>>> code but nothing ever does anything with it 🙁 Remove functions like
>>> this should never fail.
>> Yes, agreed.
>>
>>> Removal should be like I explained earlier:
>>> - Disable new PRI reception
>> This could be done by
>>
>> rcu_assign_pointer(param->fault_param, NULL);
>>
>> ?
> Not without a synchronize_rcu
>
> disable new PRI reception should be done by the driver - it should
> turn off PRI generation in the IOMMU HW and flush any HW PRI queues.
Yeah! Get you now.
Best regards,
baolu
next prev parent reply other threads:[~2023-12-13 2:18 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-07 6:42 [PATCH v8 00/12] iommu: Prepare to deliver page faults to user space Lu Baolu
2023-12-07 6:42 ` [PATCH v8 01/12] iommu: Move iommu fault data to linux/iommu.h Lu Baolu
2023-12-07 6:42 ` [PATCH v8 02/12] iommu/arm-smmu-v3: Remove unrecoverable faults reporting Lu Baolu
2023-12-07 6:42 ` [PATCH v8 03/12] iommu: Remove unrecoverable fault data Lu Baolu
2023-12-07 6:43 ` [PATCH v8 04/12] iommu: Cleanup iopf data structure definitions Lu Baolu
2023-12-07 6:43 ` [PATCH v8 05/12] iommu: Merge iopf_device_param into iommu_fault_param Lu Baolu
2023-12-07 6:43 ` [PATCH v8 06/12] iommu: Remove iommu_[un]register_device_fault_handler() Lu Baolu
2023-12-07 6:43 ` [PATCH v8 07/12] iommu: Merge iommu_fault_event and iopf_fault Lu Baolu
2023-12-07 6:43 ` [PATCH v8 08/12] iommu: Prepare for separating SVA and IOPF Lu Baolu
2023-12-07 6:43 ` [PATCH v8 09/12] iommu: Make iommu_queue_iopf() more generic Lu Baolu
2023-12-07 6:43 ` [PATCH v8 10/12] iommu: Separate SVA and IOPF Lu Baolu
2023-12-07 6:43 ` [PATCH v8 11/12] iommu: Refine locking for per-device fault data management Lu Baolu
2023-12-11 14:50 ` Jason Gunthorpe
2023-12-07 6:43 ` [PATCH v8 12/12] iommu: Use refcount for fault data access Lu Baolu
2023-12-11 15:12 ` Jason Gunthorpe
2023-12-12 3:44 ` Baolu Lu
2023-12-12 15:18 ` Jason Gunthorpe
2023-12-11 15:24 ` Jason Gunthorpe
2023-12-12 5:07 ` Baolu Lu
2023-12-12 15:18 ` Jason Gunthorpe
2023-12-13 2:19 ` Baolu Lu
2023-12-12 5:17 ` Baolu Lu
2023-12-12 15:14 ` Jason Gunthorpe
2023-12-13 2:14 ` Baolu Lu [this message]
2023-12-12 5:23 ` Baolu Lu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=6334aaf3-ed7c-4ded-827d-423b861a0b28@linux.intel.com \
--to=baolu.lu@linux.intel.com \
--cc=iommu@lists.linux.dev \
--cc=jacob.jun.pan@linux.intel.com \
--cc=jean-philippe@linaro.org \
--cc=jgg@ziepe.ca \
--cc=joro@8bytes.org \
--cc=kevin.tian@intel.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=liulongfang@huawei.com \
--cc=nicolinc@nvidia.com \
--cc=robin.murphy@arm.com \
--cc=will@kernel.org \
--cc=yan.y.zhao@intel.com \
--cc=yi.l.liu@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.