efi_install_protocol_interface up to now only returned an error code.
The patch implements the UEFI specification for InstallProtocolInterface
with the exception that it will not create new handles.
Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
include/efi_api.h | 2 +-
lib/efi_loader/efi_boottime.c | 52 ++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 52 insertions(+), 2 deletions(-)
diff --git a/include/efi_api.h b/include/efi_api.h
index f071b36b53..42cd47ff08 100644
--- a/include/efi_api.h
+++ b/include/efi_api.h
@@ -58,7 +58,7 @@ struct efi_boot_services {
efi_status_t (EFIAPI *signal_event)(void *event);
efi_status_t (EFIAPI *close_event)(void *event);
efi_status_t (EFIAPI *check_event)(void *event);
-
+#define EFI_NATIVE_INTERFACE 0x00000000
efi_status_t (EFIAPI *install_protocol_interface)(
void **handle, efi_guid_t *protocol,
int protocol_interface_type, void *protocol_interface);
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 22e9e6001d..7596f16b84 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -303,10 +303,60 @@ static efi_status_t EFIAPI
efi_install_protocol_interface(void **handle,
efi_guid_t *protocol, int protocol_interface_type,
void *protocol_interface)
{
+ struct list_head *lhandle;
+ int i;
+ efi_status_t r;
+
EFI_ENTRY("%p, %p, %d, %p", handle, protocol, protocol_interface_type,
protocol_interface);
- return EFI_EXIT(EFI_OUT_OF_RESOURCES);
+
+ if (!handle || !protocol ||
+ protocol_interface_type != EFI_NATIVE_INTERFACE) {
+ r = EFI_INVALID_PARAMETER;
+ goto out;
+ }
+
+ /* Create new handle if requested. */
+ if (!*handle) {
+ r = EFI_OUT_OF_RESOURCES;
+ goto out;
+ }
+ /* Find object. */
+ list_for_each(lhandle, &efi_obj_list) {
+ struct efi_object *efiobj;
+ efiobj = list_entry(lhandle, struct efi_object, link);
+
+ if (efiobj->handle != *handle)
+ continue;
+ /* Check if protocol is already installed on the handle. */
+ for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
+ struct efi_handler *handler = &efiobj->protocols[i];
+
+ if (handler->guid == protocol) {
+ r = EFI_INVALID_PARAMETER;
+ goto out;
+ }
+ /* Install protocol in first empty slot. */
+ for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
+ struct efi_handler *handler = &efiobj->protocols[i];
+
+ if (handler->guid)
+ continue;
+
+ handler->guid = protocol;
+ handler->protocol_interface = protocol_interface;
+ r = EFI_SUCCESS;
+ goto out;
+ }
+ }
+ r = EFI_OUT_OF_RESOURCES;
+ goto out;
+ }
+ r = EFI_INVALID_PARAMETER;
+out:
+ return EFI_EXIT(r);
}
+
static efi_status_t EFIAPI efi_reinstall_protocol_interface(void *handle,
efi_guid_t *protocol, void *old_interface,
void *new_interface)
--
2.11.0
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