diff options
| author | Nirmal Patel <nirmal.patel@linux.intel.com> | 2026-06-29 16:50:25 +0000 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2026-07-15 11:53:30 -0500 |
| commit | b030905bf5a6423d3000827a9d1cb973161cd2bb (patch) | |
| tree | 44d6c96729679feec8e77eecec142247afd4581f /include | |
| parent | dc59e4fea9d83f03bad6bddf3fa2e52491777482 (diff) | |
PCI: vmd: Add feature to scan BIOS-enumerated devices
Newer VMD with device ID 0x28C1 has unique settings compared to its
predecessor where BIOS enumerates the entire VMD device tree and assigns
respective configurations.
VMD configuration BAR0 carries over from GNR legacy VMD as the mechanism
to access the configuration space of the devices owned by VMD. The size
of this window is fixed at 256 MB, where each function consumes 4 KB and
every bus consumes 1 MB.
The shadow and scratchpad registers have been relocated from the VMD
configuration space to the VMD MMIO space in VMD BAR4/BAR5, otherwise
refers to as MEMBAR2 or MSI-X bar.
VMD MSI-X remapping enable/disable is no longer supported.
On this new device, simply obtain the bus hide range and shadow register
values set by BIOS and perform a bus scan.
Also refactor vmd_enable_domain().
Signed-off-by: Nirmal Patel <nirmal.patel@linux.intel.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20260629165025.268836-1-nirmal.patel@linux.intel.com
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/pci_ids.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index 1c9d40e09107..5026012269ad 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -2892,6 +2892,7 @@ #define PCI_DEVICE_ID_INTEL_HDA_ICH8 0x284b #define PCI_DEVICE_ID_INTEL_ICH8_6 0x2850 #define PCI_DEVICE_ID_INTEL_VMD_28C0 0x28c0 +#define PCI_DEVICE_ID_INTEL_VMD_28C1 0x28c1 #define PCI_DEVICE_ID_INTEL_ICH9_0 0x2910 #define PCI_DEVICE_ID_INTEL_ICH9_2 0x2912 #define PCI_DEVICE_ID_INTEL_ICH9_3 0x2913 |