This is a note to let you know that I've just added the patch titled
PCI: Apply Cavium ThunderX ACS quirk to more Root Ports
to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: pci-apply-cavium-thunderx-acs-quirk-to-more-root-ports.patch and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From f2ddaf8dfd4a5071ad09074d2f95ab85d35c8a1e Mon Sep 17 00:00:00 2001
From: Vadim Lomovtsev Vadim.Lomovtsev@cavium.com Date: Tue, 17 Oct 2017 05:47:39 -0700 Subject: PCI: Apply Cavium ThunderX ACS quirk to more Root Ports
From: Vadim Lomovtsev Vadim.Lomovtsev@cavium.com
commit f2ddaf8dfd4a5071ad09074d2f95ab85d35c8a1e upstream.
Extend the Cavium ThunderX ACS quirk to cover more device IDs and restrict it to only Root Ports.
Signed-off-by: Vadim Lomovtsev Vadim.Lomovtsev@cavium.com [bhelgaas: changelog, stable tag] Signed-off-by: Bjorn Helgaas bhelgaas@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/pci/quirks.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
--- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4212,6 +4212,19 @@ static int pci_quirk_amd_sb_acs(struct p #endif }
+static bool pci_quirk_cavium_acs_match(struct pci_dev *dev) +{ + /* + * Effectively selects all downstream ports for whole ThunderX 1 + * family by 0xf800 mask (which represents 8 SoCs), while the lower + * bits of device ID are used to indicate which subdevice is used + * within the SoC. + */ + return (pci_is_pcie(dev) && + (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) && + ((dev->device & 0xf800) == 0xa000)); +} + static int pci_quirk_cavium_acs(struct pci_dev *dev, u16 acs_flags) { /* @@ -4224,7 +4237,7 @@ static int pci_quirk_cavium_acs(struct p */ acs_flags &= ~(PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_SV | PCI_ACS_UF);
- if (!((dev->device >= 0xa000) && (dev->device <= 0xa0ff))) + if (!pci_quirk_cavium_acs_match(dev)) return -ENOTTY;
return acs_flags ? 0 : 1;
Patches currently in stable-queue which might be from Vadim.Lomovtsev@cavium.com are
queue-4.14/pci-set-cavium-acs-capability-quirk-flags-to-assert-rr-cr-sv-uf.patch queue-4.14/pci-apply-cavium-thunderx-acs-quirk-to-more-root-ports.patch