Merge tag 'efi-2020-10-rc5' of https://gitlab.denx.de/u-boot/custodians/u-boot-efi

Pull request for UEFI sub-system for efi-2020-10-rc5

The following bugs are fixed:

* unaligned access in br_i32_decode()
* missing restore of global data pointer in UEFI selftest
* missing restore of global data pointer on RISC-V in UEfI subsystem
* efi_var_mem_notify_exit_boot_services() should not be __efi_runtime

arch/riscv/include/asm/global_data.h

@@ -39,4 +39,13 @@ struct arch_global_data {
 
 #define DECLARE_GLOBAL_DATA_PTR register gd_t *gd asm ("gp")
 
+static inline void set_gd(volatile gd_t *gd_ptr)
+{
+#ifdef CONFIG_64BIT
+	asm volatile("ld gp, %0\n" : : "m"(gd_ptr));
+#else
+	asm volatile("lw gp, %0\n" : : "m"(gd_ptr));
+#endif
+}
+
 #endif /* __ASM_GBL_DATA_H */

lib/efi_loader/efi_boottime.c

@@ -42,9 +42,9 @@ LIST_HEAD(efi_register_notify_events);
 /* Handle of the currently executing image */
 static efi_handle_t current_image;
 
-#ifdef CONFIG_ARM
+#if defined(CONFIG_ARM) || defined(CONFIG_RISCV)
 /*
- * The "gd" pointer lives in a register on ARM and AArch64 that we declare
+ * The "gd" pointer lives in a register on ARM and RISC-V that we declare
  * fixed when compiling U-Boot. However, the payload does not know about that
  * restriction so we need to manually swap its and our view of that register on
  * EFI callback entry/exit.
@@ -86,7 +86,7 @@ static efi_status_t EFIAPI efi_disconnect_controller(
 int __efi_entry_check(void)
 {
 	int ret = entry_count++ == 0;
-#ifdef CONFIG_ARM
+#if defined(CONFIG_ARM) || defined(CONFIG_RISCV)
 	assert(efi_gd);
 	app_gd = gd;
 	set_gd(efi_gd);
@@ -98,7 +98,7 @@ int __efi_entry_check(void)
 int __efi_exit_check(void)
 {
 	int ret = --entry_count == 0;
-#ifdef CONFIG_ARM
+#if defined(CONFIG_ARM) || defined(CONFIG_RISCV)
 	set_gd(app_gd);
 #endif
 	return ret;
@@ -107,7 +107,7 @@ int __efi_exit_check(void)
 /**
  * efi_save_gd() - save global data register
  *
- * On the ARM architecture gd is mapped to a fixed register (r9 or x18).
+ * On the ARM and RISC-V architectures gd is mapped to a fixed register.
  * As this register may be overwritten by an EFI payload we save it here
  * and restore it on every callback entered.
  *
@@ -115,7 +115,7 @@ int __efi_exit_check(void)
  */
 void efi_save_gd(void)
 {
-#ifdef CONFIG_ARM
+#if defined(CONFIG_ARM) || defined(CONFIG_RISCV)
 	efi_gd = gd;
 #endif
 }
@@ -123,13 +123,13 @@ void efi_save_gd(void)
 /**
  * efi_restore_gd() - restore global data register
  *
- * On the ARM architecture gd is mapped to a fixed register (r9 or x18).
+ * On the ARM and RISC-V architectures gd is mapped to a fixed register.
  * Restore it after returning from the UEFI world to the value saved via
  * efi_save_gd().
  */
 void efi_restore_gd(void)
 {
-#ifdef CONFIG_ARM
+#if defined(CONFIG_ARM) || defined(CONFIG_RISCV)
 	/* Only restore if we're already in EFI context */
 	if (!efi_gd)
 		return;
@@ -2920,7 +2920,7 @@ efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
 		 * us to the current line. This implies that the second half
 		 * of the EFI_CALL macro has not been executed.
 		 */
-#ifdef CONFIG_ARM
+#if defined(CONFIG_ARM) || defined(CONFIG_RISCV)
 		/*
 		 * efi_exit() called efi_restore_gd(). We have to undo this
 		 * otherwise __efi_entry_check() will put the wrong value into

lib/efi_loader/efi_var_mem.c

@@ -211,7 +211,7 @@ static void efi_var_mem_bs_del(void)
  * @event:	callback event
  * @context:	callback context
  */
-static void EFIAPI __efi_runtime
+static void EFIAPI
 efi_var_mem_notify_exit_boot_services(struct efi_event *event, void *context)
 {
 	EFI_ENTRY("%p, %p", event, context);

lib/efi_selftest/efi_selftest.c

@@ -311,11 +311,13 @@ efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
 	efi_st_printf("Preparing for reset. Press any key...\n");
 	efi_st_get_key();
 
-	if (IS_ENABLED(CONFIG_EFI_HAVE_RUNTIME_RESET))
+	if (IS_ENABLED(CONFIG_EFI_HAVE_RUNTIME_RESET)) {
 		runtime->reset_system(EFI_RESET_WARM, EFI_NOT_READY,
 				      sizeof(reset_message), reset_message);
-	else
+	} else {
+		efi_restore_gd();
 		do_reset(NULL, 0, 0, NULL);
+	}
 
 	efi_st_printf("\n");
 	efi_st_error("Reset failed\n");

lib/rsa/rsa-keyprop.c

@@ -12,9 +12,9 @@
 #include <common.h>
 #include <image.h>
 #include <malloc.h>
-#include <asm/byteorder.h>
 #include <crypto/internal/rsa.h>
 #include <u-boot/rsa-mod-exp.h>
+#include <asm/unaligned.h>
 
 /**
  * br_dec16be() - Convert 16-bit big-endian integer to native
@@ -23,7 +23,7 @@
  */
 static unsigned br_dec16be(const void *src)
 {
-	return be16_to_cpup(src);
+	return get_unaligned_be16(src);
 }
 
 /**
@@ -33,7 +33,7 @@ static unsigned br_dec16be(const void *src)
  */
 static uint32_t br_dec32be(const void *src)
 {
-	return be32_to_cpup(src);
+	return get_unaligned_be32(src);
 }
 
 /**