[PATCH 1/2] efi: Add dependency on M-mode for RISC-V

[Sean Anderson]

>From section 2.3.7 of the UEFI specification:

> RISC-V UEFI will only be executed in machine mode. The machine mode has
> the highest privilege and this mode is the only mandatory privilege level
> for RISC-V platforms; all other privilege levels are optional depending
> on the platform requirements. Machine mode is the first mode entered at
> the power-on reset. This level is used in UEFI for low-level access to a
> hardware platform.

Signed-off-by: Sean Anderson <seanga2 at gmail.com>
---

 lib/efi_loader/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index bad1a29ba8..2197c84bf3 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -10,6 +10,8 @@ config EFI_LOADER
 	depends on !EFI_STUB || !X86_64 || EFI_STUB_64BIT
 	# We need EFI_STUB_32BIT to be set on x86_32 with EFI_STUB
 	depends on !EFI_STUB || !X86 || X86_64 || EFI_STUB_32BIT
+	# RISC-V UEFI must run in machine mode
+	depends on !RISCV || RISCV_M_MODE
 	default y if !ARM || SYS_CPU = armv7 || SYS_CPU = armv8
 	select LIB_UUID
 	select HAVE_BLOCK_DEVICE
-- 
2.28.0