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x86/PCI: VMD: Request userspace control of PCIe hotplug indicators

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Add set_dev_domain_options() to set PCI domain-specific options as devices
are added.  The first usage is to request exclusive userspace control of
PCIe hotplug indicators in VMD domains.

Devices in a VMD domain use PCIe hotplug Attention and Power Indicators in
a non-standard way; tell pciehp to ignore the indicators so userspace can
control them via the sysfs "attention" file.

To determine whether a bus is within a VMD domain, add a bool to the
pci_sysdata structure that the VMD driver sets during initialization.

[bhelgaas: changelog]
Requested-by: Kapil Karkra <kapil.karkra@intel.com>
Tested-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Keith Busch
2016-09-13 09:05:40 -06:00
committed by Bjorn Helgaas
parent 576243b3f9
commit 3161832d58
3 changed files with 22 additions and 0 deletions
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7
arch/x86/pci/common.c
View File

@@ -677,6 +677,12 @@ static void set_dma_domain_ops(struct pci_dev *pdev)
static void set_dma_domain_ops(struct pci_dev *pdev) {}
#endif
static void set_dev_domain_options(struct pci_dev *pdev)
{
if (is_vmd(pdev->bus))
pdev->hotplug_user_indicators = 1;
}
int pcibios_add_device(struct pci_dev *dev)
{
struct setup_data *data;
@@ -707,6 +713,7 @@ int pcibios_add_device(struct pci_dev *dev)
iounmap(data);
}
set_dma_domain_ops(dev);
set_dev_domain_options(dev);
return 0;
}

1
arch/x86/pci/vmd.c
View File

@@ -596,6 +596,7 @@ static int vmd_enable_domain(struct vmd_dev *vmd)
.parent = res,
};
sd->vmd_domain = true;
sd->domain = vmd_find_free_domain();
if (sd->domain < 0)
return sd->domain;