| Message ID | 1467335453-25967-2-git-send-email-lersek@redhat.com |
|---|---|
| State | Superseded |
| Headers | show |
diff --git a/MdePkg/Include/IndustryStandard/Pci22.h b/MdePkg/Include/IndustryStandard/Pci22.h index db24a153e15e..4cf8389c699b 100644 --- a/MdePkg/Include/IndustryStandard/Pci22.h +++ b/MdePkg/Include/IndustryStandard/Pci22.h @@ -635,6 +635,7 @@ typedef union { #define EFI_PCI_CAPABILITY_ID_SLOTID 0x04 #define EFI_PCI_CAPABILITY_ID_MSI 0x05 #define EFI_PCI_CAPABILITY_ID_HOTPLUG 0x06 +#define EFI_PCI_CAPABILITY_ID_SHPC 0x0C /// /// Capabilities List Header
The "Pci22.h" header file defines the macro EFI_PCI_CAPABILITY_ID_HOTPLUG with value 0x06. According to all of: - later parts of the same header file, - Appendix H ("Capability IDs") of the PCI Local Bus Specification Revision 2.3, - and Chapter 2 ("Capability IDs") of the PCI Code and ID Assignment Specification Revision 0.9, 0x06 means "CompactPCI Hot Swap". It does not mean "PCI Hot-Plug": that capability is described by ID 0x0C: 0Ch PCI Hot-Plug -- This Capability ID indicates that the associated device conforms to the Standard Hot-Plug Controller model. Therefore EFI_PCI_CAPABILITY_ID_HOTPLUG is arguably a misnomer. PciBusDxe (mis-)uses EFI_PCI_CAPABILITY_ID_HOTPLUG in the IsSHPC() helper function to identify PCI Hot-Plug capability. In order to preserve compatibility with existent code, leave EFI_PCI_CAPABILITY_ID_HOTPLUG alone, and introduce EFI_PCI_CAPABILITY_ID_SHPC with the right ID value. Cc: "Johnson, Brian J." <bjohnson@sgi.com> Cc: Alex Williamson <alex.williamson@redhat.com> Cc: Andrew Fish <afish@apple.com> Cc: Feng Tian <feng.tian@intel.com> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Liming Gao <liming.gao@intel.com> Cc: Marcel Apfelbaum <marcel@redhat.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Ruiyu Ni <ruiyu.ni@intel.com> Cc: Star Zeng <star.zeng@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <lersek@redhat.com> --- MdePkg/Include/IndustryStandard/Pci22.h | 1 + 1 file changed, 1 insertion(+) -- 1.8.3.1 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel