diff options
| author | Zhi Jin <zhi.jin@intel.com> | 2023-11-08 10:39:49 +0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2023-12-01 00:53:56 +0000 |
| commit | 534021965f6f7c417610add53984f39d6945bbcf (patch) | |
| tree | 549b76a08f2b78d91cb8aa9c21a6094de868bf76 /MdeModulePkg | |
| parent | 26d484d0867b03ebd8a1ecdd9895f17e96732503 (diff) | |
| download | edk2-534021965f6f7c417610add53984f39d6945bbcf.tar.gz | |
MdeModulePkg: Optimize CoreInstallMultipleProtocolInterfaces
CoreLocateDevicePath is used in CoreInstallMultipleProtocolInterfaces to
check if a Device Path Protocol instance with the same device path is
alreay installed.
CoreLocateDevicePath is a generic API, and would introduce some
unnecessary overhead for such usage.
The optimization is:
1. Implement IsDevicePathInstalled to loop all the Device Path
Protocols installed and check if any of them matchs the given device
path.
2. Replace CoreLocateDevicePath with IsDevicePathInstalled in
CoreInstallMultipleProtocolInterfaces.
This optimization could save several seconds in PCI enumeration on a
system with many PCI devices.
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Dandan Bi <dandan.bi@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Signed-off-by: Zhi Jin <zhi.jin@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
Diffstat (limited to 'MdeModulePkg')
| -rw-r--r-- | MdeModulePkg/Core/Dxe/Hand/Handle.c | 89 |
1 files changed, 72 insertions, 17 deletions
diff --git a/MdeModulePkg/Core/Dxe/Hand/Handle.c b/MdeModulePkg/Core/Dxe/Hand/Handle.c index bd6c57843e..51e5b5d3b3 100644 --- a/MdeModulePkg/Core/Dxe/Hand/Handle.c +++ b/MdeModulePkg/Core/Dxe/Hand/Handle.c @@ -198,6 +198,66 @@ CoreFindProtocolInterface ( }
/**
+ Check if the given device path is already installed.
+
+ @param DevicePath The given device path
+
+ @retval TRUE The device path is already installed
+ @retval FALSE The device path is not installed
+
+**/
+BOOLEAN
+IsDevicePathInstalled (
+ IN EFI_DEVICE_PATH_PROTOCOL *DevicePath
+ )
+{
+ UINTN SourceSize;
+ UINTN Size;
+ BOOLEAN Found;
+ LIST_ENTRY *Link;
+ PROTOCOL_ENTRY *ProtEntry;
+ PROTOCOL_INTERFACE *Prot;
+
+ if (DevicePath == NULL) {
+ return FALSE;
+ }
+
+ Found = FALSE;
+ SourceSize = GetDevicePathSize (DevicePath);
+ ASSERT (SourceSize >= END_DEVICE_PATH_LENGTH);
+
+ CoreAcquireProtocolLock ();
+ //
+ // Look up the protocol entry
+ //
+ ProtEntry = CoreFindProtocolEntry (&gEfiDevicePathProtocolGuid, FALSE);
+ if (ProtEntry == NULL) {
+ goto Done;
+ }
+
+ for (Link = ProtEntry->Protocols.ForwardLink; Link != &ProtEntry->Protocols; Link = Link->ForwardLink) {
+ //
+ // Loop on the DevicePathProtocol interfaces
+ //
+ Prot = CR (Link, PROTOCOL_INTERFACE, ByProtocol, PROTOCOL_INTERFACE_SIGNATURE);
+
+ //
+ // Check if DevicePath is same as this interface
+ //
+ Size = GetDevicePathSize (Prot->Interface);
+ ASSERT (Size >= END_DEVICE_PATH_LENGTH);
+ if ((Size == SourceSize) && (CompareMem (DevicePath, Prot->Interface, Size - END_DEVICE_PATH_LENGTH) == 0)) {
+ Found = TRUE;
+ break;
+ }
+ }
+
+Done:
+ CoreReleaseProtocolLock ();
+ return Found;
+}
+
+/**
Removes an event from a register protocol notify list on a protocol.
@param Event The event to search for in the protocol
@@ -510,15 +570,13 @@ CoreInstallMultipleProtocolInterfaces ( ...
)
{
- VA_LIST Args;
- EFI_STATUS Status;
- EFI_GUID *Protocol;
- VOID *Interface;
- EFI_TPL OldTpl;
- UINTN Index;
- EFI_HANDLE OldHandle;
- EFI_HANDLE DeviceHandle;
- EFI_DEVICE_PATH_PROTOCOL *DevicePath;
+ VA_LIST Args;
+ EFI_STATUS Status;
+ EFI_GUID *Protocol;
+ VOID *Interface;
+ EFI_TPL OldTpl;
+ UINTN Index;
+ EFI_HANDLE OldHandle;
if (Handle == NULL) {
return EFI_INVALID_PARAMETER;
@@ -548,14 +606,11 @@ CoreInstallMultipleProtocolInterfaces ( //
// Make sure you are installing on top a device path that has already been added.
//
- if (CompareGuid (Protocol, &gEfiDevicePathProtocolGuid)) {
- DeviceHandle = NULL;
- DevicePath = Interface;
- Status = CoreLocateDevicePath (&gEfiDevicePathProtocolGuid, &DevicePath, &DeviceHandle);
- if (!EFI_ERROR (Status) && (DeviceHandle != NULL) && IsDevicePathEnd (DevicePath)) {
- Status = EFI_ALREADY_STARTED;
- continue;
- }
+ if (CompareGuid (Protocol, &gEfiDevicePathProtocolGuid) &&
+ IsDevicePathInstalled (Interface))
+ {
+ Status = EFI_ALREADY_STARTED;
+ continue;
}
//
|