linux-kernel - [PATCH] PCI/P2PDMA: Add AMD Zen 2 root complex to the list of allowed bridges

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Date:   Thu, 23 Jul 2020 11:43:17 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Cc:     Logan Gunthorpe <logang@...tatee.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Christian König <christian.koenig@....com>,
        Huang Rui <ray.huang@....com>,
        Alex Deucher <alexdeucher@...il.com>
Subject: [PATCH] PCI/P2PDMA: Add AMD Zen 2 root complex to the list of allowed bridges

The AMD Zen 2 root complex (Starship/Matisse) was tested for P2PDMA
transactions between root ports and found to work. Therefore add it
to the list.

Signed-off-by: Logan Gunthorpe <logang@...tatee.com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Christian König <christian.koenig@....com>
Cc: Huang Rui <ray.huang@....com>
Cc: Alex Deucher <alexdeucher@...il.com>
---
 drivers/pci/p2pdma.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c
index e8e444eeb1cd..3d67a1ee083e 100644
--- a/drivers/pci/p2pdma.c
+++ b/drivers/pci/p2pdma.c
@@ -284,6 +284,8 @@ static const struct pci_p2pdma_whitelist_entry {
 	{PCI_VENDOR_ID_AMD,	0x1450,	0},
 	{PCI_VENDOR_ID_AMD,	0x15d0,	0},
 	{PCI_VENDOR_ID_AMD,	0x1630,	0},
+	/* AMD ZEN 2 */
+	{PCI_VENDOR_ID_AMD,	0x1480,	0},
 
 	/* Intel Xeon E5/Core i7 */
 	{PCI_VENDOR_ID_INTEL,	0x3c00, REQ_SAME_HOST_BRIDGE},

base-commit: ba47d845d715a010f7b51f6f89bae32845e6acb7
-- 
2.20.1