linux-kernel - Re: [RFC PATCH v10 1/5] iommu/vt-d: add pci_dev parameter to qi_submit

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Date: Wed, 10 Jan 2024 12:59:16 +0800
From: Baolu Lu <baolu.lu@...ux.intel.com>
To: Ethan Zhao <haifeng.zhao@...ux.intel.com>, kevin.tian@...el.com,
 bhelgaas@...gle.com, dwmw2@...radead.org, will@...nel.org,
 robin.murphy@....com, lukas@...ner.de
Cc: baolu.lu@...ux.intel.com, linux-pci@...r.kernel.org,
 iommu@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v10 1/5] iommu/vt-d: add pci_dev parameter to
 qi_submit_sync and refactor callers

On 12/29/23 1:02 AM, Ethan Zhao wrote:
> Signed-off-by: Ethan Zhao<haifeng.zhao@...ux.intel.com>

Please don't leave the message body empty. You should describe why do
you want to add the change in this patch.

> ---
>   drivers/iommu/intel/dmar.c          | 45 +++++++++++++++++++++--------
>   drivers/iommu/intel/iommu.c         | 26 +++++------------
>   drivers/iommu/intel/iommu.h         | 17 +++++------
>   drivers/iommu/intel/irq_remapping.c |  2 +-
>   drivers/iommu/intel/pasid.c         | 11 ++-----
>   drivers/iommu/intel/svm.c           | 13 ++++-----
>   6 files changed, 58 insertions(+), 56 deletions(-)
> 
> diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c
> index 23cb80d62a9a..3d661f2b7946 100644
> --- a/drivers/iommu/intel/dmar.c
> +++ b/drivers/iommu/intel/dmar.c
> @@ -1344,7 +1344,7 @@ static int qi_check_fault(struct intel_iommu *iommu, int index, int wait_index)
>    * can be part of the submission but it will not be polled for completion.
>    */
>   int qi_submit_sync(struct intel_iommu *iommu, struct qi_desc *desc,
> -		   unsigned int count, unsigned long options)
> +		   unsigned int count, unsigned long options, struct pci_dev *pdev)

How about adding a bit in options parameter to tell whether the @pdev is
valid?

Best regards,
baolu