Merge tag 'efi-next' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi into efi/core

More EFI updates for v5.7

 - Incorporate a stable branch with the EFI pieces of Hans's work on
   loading device firmware from EFI boot service memory regions

Signed-off-by: Ingo Molnar <mingo@kernel.org>

2 files changed, 48 insertions, 0 deletions

diff --git a/include/linux/efi.h b/include/linux/efi.h
index e8a08a499131..abfc98e4dfe1 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -775,6 +775,7 @@ extern int __init efi_setup_pcdp_console(char *);
 #define EFI_NX_PE_DATA		9	/* Can runtime data regions be mapped non-executable? */
 #define EFI_MEM_ATTR		10	/* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
 #define EFI_MEM_NO_SOFT_RESERVE	11	/* Is the kernel configured to ignore soft reservations? */
+#define EFI_PRESERVE_BS_REGIONS	12	/* Are EFI boot-services memory segments available? */
 
 #ifdef CONFIG_EFI
 /*
@@ -1097,6 +1098,12 @@ static inline void
 efi_enable_reset_attack_mitigation(void) { }
 #endif
 
+#ifdef CONFIG_EFI_EMBEDDED_FIRMWARE
+void efi_check_for_embedded_firmwares(void);
+#else
+static inline void efi_check_for_embedded_firmwares(void) { }
+#endif
+
 efi_status_t efi_random_get_seed(void);
 
 void efi_retrieve_tpm2_eventlog(void);
diff --git a/include/linux/efi_embedded_fw.h b/include/linux/efi_embedded_fw.h
new file mode 100644
index 000000000000..3d066c6370c6
--- /dev/null
+++ b/include/linux/efi_embedded_fw.h
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_EFI_EMBEDDED_FW_H
+#define _LINUX_EFI_EMBEDDED_FW_H
+
+#include <linux/list.h>
+#include <linux/mod_devicetable.h>
+
+#define EFI_EMBEDDED_FW_PREFIX_LEN		8
+
+/*
+ * This struct and efi_embedded_fw_list are private to the efi-embedded fw
+ * implementation they are in this header for use by lib/test_firmware.c only!
+ */
+struct efi_embedded_fw {
+	struct list_head list;
+	const char *name;
+	const u8 *data;
+	size_t length;
+};
+
+extern struct list_head efi_embedded_fw_list;
+
+/**
+ * struct efi_embedded_fw_desc - This struct is used by the EFI embedded-fw
+ *                               code to search for embedded firmwares.
+ *
+ * @name:   Name to register the firmware with if found
+ * @prefix: First 8 bytes of the firmware
+ * @length: Length of the firmware in bytes including prefix
+ * @sha256: SHA256 of the firmware
+ */
+struct efi_embedded_fw_desc {
+	const char *name;
+	u8 prefix[EFI_EMBEDDED_FW_PREFIX_LEN];
+	u32 length;
+	u8 sha256[32];
+};
+
+int efi_get_embedded_fw(const char *name, const u8 **dat, size_t *sz);
+
+#endif