diff options
| author | Bjorn Helgaas <bhelgaas@google.com> | 2017-06-19 15:26:57 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-07-02 18:47:15 -0500 |
| commit | 575a144e7b3006c1b583ccecc4ede8b180d00d0c (patch) | |
| tree | 3fb8d4ebafd55b6376f0aa9a6e2cb5206132ab84 /drivers | |
| parent | 769b461fc0c0451bacf75826d5830fc07c5a57e4 (diff) | |
PCI: vmd: Correct comment: VMD domains start at 0x10000, not 0x1000
VMD domains are allocated starting at 0x10000, not 0x1000 as the comment
said. Correct the comment and add a reference to the ACPI spec for _SEG.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/host/vmd.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/pci/host/vmd.c b/drivers/pci/host/vmd.c index e27ad2a3bd33..53aa1d4b17e8 100644 --- a/drivers/pci/host/vmd.c +++ b/drivers/pci/host/vmd.c @@ -539,7 +539,10 @@ static void vmd_detach_resources(struct vmd_dev *vmd) } /* - * VMD domains start at 0x1000 to not clash with ACPI _SEG domains. + * VMD domains start at 0x10000 to not clash with ACPI _SEG domains. + * Per ACPI r6.0, sec 6.5.6, _SEG returns an integer, of which the lower + * 16 bits are the PCI Segment Group (domain) number. Other bits are + * currently reserved. */ static int vmd_find_free_domain(void) { |