From: Joerg Roedel <joro@8bytes.org> To: Bjorn Helgaas <helgaas@kernel.org> Cc: Zhangfei Gao <zhangfei.gao@linaro.org>, Bjorn Helgaas <bhelgaas@google.com>, Arnd Bergmann <arnd@arndb.de>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Hanjun Guo <guohanjun@huawei.com>, Sudeep Holla <sudeep.holla@arm.com>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, Len Brown <lenb@kernel.org>, jean-philippe <jean-philippe@linaro.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Herbert Xu <herbert@gondor.apana.org.au>, kenneth-lee-2012@foxmail.com, Wangzhou <wangzhou1@hisilicon.com>, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, iommu@lists.linux-foundation.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org Subject: Re: [PATCH 0/2] Introduce PCI_FIXUP_IOMMU Date: Mon, 22 Jun 2020 13:53:48 +0200 [thread overview] Message-ID: <20200622115347.GG3701@8bytes.org> (raw) In-Reply-To: <20200601174104.GA734973@bjorn-Precision-5520> On Mon, Jun 01, 2020 at 12:41:04PM -0500, Bjorn Helgaas wrote: > I found this [1] from Paul Menzel, which was a slowdown caused by > quirk_usb_early_handoff(). I think the real problem is individual > quirks that take a long time. > > The PCI_FIXUP_IOMMU things we're talking about should be fast, and of > course, they're only run for matching devices anyway. So I'd rather > keep them as PCI_FIXUP_FINAL than add a whole new phase. Okay, so if it is not a performance problem, then I am fine with using PCI_FIXUP_FINAL. But I dislike calling the fixups from IOMMU code, there must be a better solution. Regards, Joerg > [1] https://lore.kernel.org/linux-pci/b1533fd5-1fae-7256-9597-36d3d5de9d2a@molgen.mpg.de/
WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org> To: Bjorn Helgaas <helgaas@kernel.org> Cc: jean-philippe <jean-philippe@linaro.org>, Herbert Xu <herbert@gondor.apana.org.au>, Arnd Bergmann <arnd@arndb.de>, linux-pci@vger.kernel.org, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Hanjun Guo <guohanjun@huawei.com>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, kenneth-lee-2012@foxmail.com, linux-acpi@vger.kernel.org, linux-crypto@vger.kernel.org, Sudeep Holla <sudeep.holla@arm.com>, Bjorn Helgaas <bhelgaas@google.com>, Zhangfei Gao <zhangfei.gao@linaro.org>, linux-arm-kernel@lists.infradead.org, Len Brown <lenb@kernel.org> Subject: Re: [PATCH 0/2] Introduce PCI_FIXUP_IOMMU Date: Mon, 22 Jun 2020 13:53:48 +0200 [thread overview] Message-ID: <20200622115347.GG3701@8bytes.org> (raw) In-Reply-To: <20200601174104.GA734973@bjorn-Precision-5520> On Mon, Jun 01, 2020 at 12:41:04PM -0500, Bjorn Helgaas wrote: > I found this [1] from Paul Menzel, which was a slowdown caused by > quirk_usb_early_handoff(). I think the real problem is individual > quirks that take a long time. > > The PCI_FIXUP_IOMMU things we're talking about should be fast, and of > course, they're only run for matching devices anyway. So I'd rather > keep them as PCI_FIXUP_FINAL than add a whole new phase. Okay, so if it is not a performance problem, then I am fine with using PCI_FIXUP_FINAL. But I dislike calling the fixups from IOMMU code, there must be a better solution. Regards, Joerg > [1] https://lore.kernel.org/linux-pci/b1533fd5-1fae-7256-9597-36d3d5de9d2a@molgen.mpg.de/ _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2020-06-22 11:53 UTC|newest] Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-05-26 11:49 [PATCH 0/2] Introduce PCI_FIXUP_IOMMU Zhangfei Gao 2020-05-26 11:49 ` Zhangfei Gao 2020-05-26 11:49 ` Zhangfei Gao 2020-05-26 11:49 ` [PATCH 1/2] PCI: " Zhangfei Gao 2020-05-26 11:49 ` Zhangfei Gao 2020-05-26 11:49 ` Zhangfei Gao 2020-05-26 14:46 ` Christoph Hellwig 2020-05-26 14:46 ` Christoph Hellwig 2020-05-26 14:46 ` Christoph Hellwig 2020-05-26 15:09 ` Zhangfei Gao 2020-05-26 15:09 ` Zhangfei Gao 2020-05-26 15:09 ` Zhangfei Gao 2020-05-27 9:01 ` Greg Kroah-Hartman 2020-05-27 9:01 ` Greg Kroah-Hartman 2020-05-27 9:01 ` Greg Kroah-Hartman 2020-05-26 11:49 ` [PATCH 2/2] iommu: calling pci_fixup_iommu in iommu_fwspec_init Zhangfei Gao 2020-05-26 11:49 ` Zhangfei Gao 2020-05-26 11:49 ` Zhangfei Gao 2020-05-27 9:01 ` Greg Kroah-Hartman 2020-05-27 9:01 ` Greg Kroah-Hartman 2020-05-27 9:01 ` Greg Kroah-Hartman 2020-05-28 6:53 ` Zhangfei Gao 2020-05-28 6:53 ` Zhangfei Gao 2020-05-28 6:53 ` Zhangfei Gao 2020-05-27 9:00 ` [PATCH 0/2] Introduce PCI_FIXUP_IOMMU Greg Kroah-Hartman 2020-05-27 9:00 ` Greg Kroah-Hartman 2020-05-27 9:00 ` Greg Kroah-Hartman 2020-05-27 9:53 ` Arnd Bergmann 2020-05-27 9:53 ` Arnd Bergmann 2020-05-27 9:53 ` Arnd Bergmann 2020-05-27 13:51 ` Zhangfei Gao 2020-05-27 13:51 ` Zhangfei Gao 2020-05-27 13:51 ` Zhangfei Gao 2020-05-27 18:18 ` Bjorn Helgaas 2020-05-27 18:18 ` Bjorn Helgaas 2020-05-27 18:18 ` Bjorn Helgaas 2020-05-28 6:46 ` Zhangfei Gao 2020-05-28 6:46 ` Zhangfei Gao 2020-05-28 6:46 ` Zhangfei Gao 2020-05-28 7:33 ` Joerg Roedel 2020-05-28 7:33 ` Joerg Roedel 2020-05-28 7:33 ` Joerg Roedel 2020-06-01 17:41 ` Bjorn Helgaas 2020-06-01 17:41 ` Bjorn Helgaas 2020-06-01 17:41 ` Bjorn Helgaas 2020-06-04 13:33 ` Zhangfei Gao 2020-06-04 13:33 ` Zhangfei Gao 2020-06-04 13:33 ` Zhangfei Gao 2020-06-05 23:19 ` Bjorn Helgaas 2020-06-05 23:19 ` Bjorn Helgaas 2020-06-05 23:19 ` Bjorn Helgaas 2020-06-08 2:54 ` Zhangfei Gao 2020-06-08 2:54 ` Zhangfei Gao 2020-06-08 2:54 ` Zhangfei Gao 2020-06-08 16:41 ` Bjorn Helgaas 2020-06-08 16:41 ` Bjorn Helgaas 2020-06-08 16:41 ` Bjorn Helgaas 2020-06-09 4:01 ` Zhangfei Gao 2020-06-09 4:01 ` Zhangfei Gao 2020-06-09 4:01 ` Zhangfei Gao 2020-06-09 9:15 ` Arnd Bergmann 2020-06-09 9:15 ` Arnd Bergmann 2020-06-09 9:15 ` Arnd Bergmann 2020-06-09 16:49 ` Bjorn Helgaas 2020-06-09 16:49 ` Bjorn Helgaas 2020-06-09 16:49 ` Bjorn Helgaas 2020-06-11 2:54 ` Zhangfei Gao 2020-06-11 2:54 ` Zhangfei Gao 2020-06-11 2:54 ` Zhangfei Gao 2020-06-11 13:44 ` Bjorn Helgaas 2020-06-11 13:44 ` Bjorn Helgaas 2020-06-11 13:44 ` Bjorn Helgaas 2020-06-13 14:30 ` Zhangfei Gao 2020-06-13 14:30 ` Zhangfei Gao 2020-06-13 14:30 ` Zhangfei Gao 2020-06-15 23:52 ` Bjorn Helgaas 2020-06-15 23:52 ` Bjorn Helgaas 2020-06-15 23:52 ` Bjorn Helgaas 2020-06-19 2:26 ` Zhangfei Gao 2020-06-19 2:26 ` Zhangfei Gao 2020-06-19 2:26 ` Zhangfei Gao 2020-06-23 15:04 ` Bjorn Helgaas 2020-06-23 15:04 ` Bjorn Helgaas 2020-06-23 15:04 ` Bjorn Helgaas 2020-12-16 11:24 ` Zhou Wang 2020-12-16 11:24 ` Zhou Wang 2020-12-16 11:24 ` Zhou Wang 2020-12-17 20:38 ` Bjorn Helgaas 2020-12-17 20:38 ` Bjorn Helgaas 2020-12-17 20:38 ` Bjorn Helgaas 2021-01-12 6:49 ` [PATCH] PCI: Add a quirk to enable SVA for HiSilicon chip Zhangfei Gao 2021-01-12 17:02 ` Bjorn Helgaas 2021-01-13 12:05 ` Zhangfei Gao 2021-01-13 14:39 ` Jean-Philippe Brucker 2021-01-12 7:05 ` [PATCH 0/2] Introduce PCI_FIXUP_IOMMU zhangfei.gao 2021-01-12 7:05 ` zhangfei.gao 2020-06-22 11:55 ` Joerg Roedel 2020-06-22 11:55 ` Joerg Roedel 2020-06-23 7:48 ` Zhangfei Gao 2020-06-23 7:48 ` Zhangfei Gao 2020-06-22 11:53 ` Joerg Roedel [this message] 2020-06-22 11:53 ` Joerg Roedel
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