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b=bkCXRgPMcqxKI24OgcQ6q0P/dTSLbxBvUM1k0etYwj9iPHsGm/rvi9sNijujTjMRV1aWBNrXVmiR4YxKiuJcnsBTFM+8dLNRw+T3/bqdDAv9maVwvdkgl4EdI140Fv8kcqk43S5+sHDAgaOkgMJBTGzufW8DZy6pvLhdQIQvQA0= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from PH8PR12MB6914.namprd12.prod.outlook.com (2603:10b6:510:1cb::21) by DS0PR12MB7948.namprd12.prod.outlook.com (2603:10b6:8:152::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.245.11; Thu, 23 Jul 2026 15:45:27 +0000 Received: from PH8PR12MB6914.namprd12.prod.outlook.com ([fe80::2893:177a:72b0:6000]) by PH8PR12MB6914.namprd12.prod.outlook.com ([fe80::2893:177a:72b0:6000%6]) with mapi id 15.21.0245.010; Thu, 23 Jul 2026 15:45:27 +0000 Message-ID: <2a9f85b9-7fa3-41ab-9383-ffa1f44bbfd8@amd.com> Date: Thu, 23 Jul 2026 10:45:23 -0500 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] PCI: Mark Radeon Pro WX 4100 ATS as broken Content-Language: en-US To: Bjorn Helgaas , Vasant Hegde Cc: iommu@lists.linux.dev, joro@8bytes.org, linux-pci@vger.kernel.org, will@kernel.org, robin.murphy@arm.com, suravee.suthikulpanit@amd.com, bhelgaas@google.com, alexander.deucher@amd.com, jgg@ziepe.ca References: <20260723061548.10187-1-vasant.hegde@amd.com> <20260723061548.10187-2-vasant.hegde@amd.com> <20260723154259.GA836122@bhelgaas> From: Mario Limonciello In-Reply-To: <20260723154259.GA836122@bhelgaas> Content-Type: text/plain; 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It would have > to be a pretty substantial benefit to outweigh the end-user frustration of > defects like this. > > If ATS isn't going to be validated by vendors, maybe we should disable it > on all AMD/ATI devices? Or maybe only the GPUs? Isn't that a pretty big performance impact to have ATS disabled? At least I don't think I would want a blanket policy without data supporting it's a good idea. > >> Suggested-by: Alex Deucher >> Cc: Bjorn Helgaas >> Cc: linux-pci@vger.kernel.org >> Signed-off-by: Vasant Hegde >> --- >> drivers/pci/quirks.c | 2 ++ >> 1 file changed, 2 insertions(+) >> >> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c >> index b09f27f7846f..d55657347d88 100644 >> --- a/drivers/pci/quirks.c >> +++ b/drivers/pci/quirks.c >> @@ -5686,6 +5686,8 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7340, quirk_amd_harvest_no_ats); >> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7341, quirk_amd_harvest_no_ats); >> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7347, quirk_amd_harvest_no_ats); >> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x734f, quirk_amd_harvest_no_ats); >> +/* Radeon Pro WX 4100 */ >> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x67e3, quirk_amd_harvest_no_ats); >> /* AMD Raven platform iGPU */ >> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x15d8, quirk_amd_harvest_no_ats); >> >> -- >> 2.31.1 >>