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Message-ID: <20231224103225.GA31197@wunner.de> Date: Sun, 24 Dec 2023 11:32:25 +0100 From: Lukas Wunner <lukas@...ner.de> To: Ethan Zhao <haifeng.zhao@...ux.intel.com> Cc: bhelgaas@...gle.com, baolu.lu@...ux.intel.com, dwmw2@...radead.org, will@...nel.org, robin.murphy@....com, linux-pci@...r.kernel.org, iommu@...ts.linux.dev, linux-kernel@...r.kernel.org Subject: Re: [RFC PATCH v6 2/4] iommu/vt-d: don's issue devTLB flush request when device is disconnected On Sun, Dec 24, 2023 at 12:06:55AM -0500, Ethan Zhao wrote: > --- a/drivers/iommu/intel/pasid.c > +++ b/drivers/iommu/intel/pasid.c > @@ -481,6 +481,9 @@ devtlb_invalidation_with_pasid(struct intel_iommu *iommu, > if (!info || !info->ats_enabled) > return; > > + if (pci_dev_is_disconnected(to_pci_dev(dev))) > + return; > + > sid = info->bus << 8 | info->devfn; > qdep = info->ats_qdep; > pfsid = info->pfsid; Do you even need this or is patch [4/4] sufficient? Is there a benefit to the hunk above on top of patch [4/4]? Thanks, Lukas
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