From: Feng Tang <feng.tang@linux.alibaba.com>
To: Bjorn Helgaas <bhelgaas@google.com>,
Logan Gunthorpe <logang@deltatee.com>
Cc: Stephen Bates <sbates@raithlin.com>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
Feng Tang <feng.tang@linux.alibaba.com>
Subject: [PATCH] PCI/P2PDMA: Add Alibaba T-HEAD Yitian 710 to whitelist
Date: Fri, 18 Sep 2026 16:24:12 +0800 [thread overview]
Message-ID: <20260918082412.15967-1-feng.tang@linux.alibaba.com> (raw)
Alibaba T-HEAD Yitian 710 surports PCI peer-to-peer transactions. Add it
to the P2P whitelist.
2 NVME cards with CMB (Command Memory Buffer) have run p2pmem-test [1]
fine, under same root complex and different root complexes.
[1]. https://github.com/sbates130272/p2pmem-test
Signed-off-by: Feng Tang <feng.tang@linux.alibaba.com>
---
drivers/pci/p2pdma.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c
index c8c414af7078..beb1fe20c9de 100644
--- a/drivers/pci/p2pdma.c
+++ b/drivers/pci/p2pdma.c
@@ -576,6 +576,8 @@ static const struct pci_p2pdma_whitelist_entry {
{PCI_VENDOR_ID_ZHAOXIN, 0x1006, REQ_SAME_HOST_BRIDGE},
{PCI_VENDOR_ID_ZHAOXIN, 0x1007, REQ_SAME_HOST_BRIDGE},
{PCI_VENDOR_ID_ZHAOXIN, 0x1008, 0},
+ /* Alibaba T-HEAD Yitian 710 CPU */
+ {PCI_VENDOR_ID_ALIBABA, 0x8000, 0},
{}
};
base-commit: 2ce4ced05cd7b16f3d3430eac021d6184752175f
--
2.43.5
next reply other threads:[~2026-09-18 8:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-18 8:24 Feng Tang [this message]
2026-09-18 15:17 ` Logan Gunthorpe
2026-09-18 17:33 ` Bjorn Helgaas
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