4 Commits

Author	SHA1	Message	Date
Sunil V L	3f68e69520	riscv/efi_stub: Add support for RISCV_EFI_BOOT_PROTOCOL ... Add support for getting the boot hart ID from the Linux EFI stub using RISCV_EFI_BOOT_PROTOCOL. This method is preferred over the existing DT based approach since it works irrespective of DT or ACPI. The specification of the protocol is hosted at: https://github.com/riscv-non-isa/riscv-uefi Signed-off-by: Sunil V L <sunilvl@ventanamicro.com> Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Link: https://lore.kernel.org/r/20220519051512.136724-2-sunilvl@ventanamicro.com [ardb: minor tweaks for coding style and whitespace] Signed-off-by: Ard Biesheuvel <ardb@kernel.org>	2022-05-19 10:22:17 +02:00
Ard Biesheuvel	416a9f84a7	efi: libstub: pass image handle to handle_kernel_image() ... In a future patch, arm64's implementation of handle_kernel_image() will omit randomizing the placement of the kernel if the load address was chosen randomly by the loader. In order to do this, it needs to locate a protocol on the image handle, so pass it to handle_kernel_image(). Signed-off-by: Ard Biesheuvel <ardb@kernel.org>	2022-05-03 15:31:28 +02:00
Sunil V L	dcf0c83885	riscv/efi_stub: Fix get_boot_hartid_from_fdt() return value ... The get_boot_hartid_from_fdt() function currently returns U32_MAX for failure case which is not correct because U32_MAX is a valid hartid value. This patch fixes the issue by returning error code. Cc: <stable@vger.kernel.org> Fixes: d7071743db ("RISC-V: Add EFI stub support.") Signed-off-by: Sunil V L <sunilvl@ventanamicro.com> Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>	2022-02-28 10:07:49 +01:00
Atish Patra	d7071743db	RISC-V: Add EFI stub support. ... Add a RISC-V architecture specific stub code that actually copies the actual kernel image to a valid address and jump to it after boot services are terminated. Enable UEFI related kernel configs as well for RISC-V. Signed-off-by: Atish Patra <atish.patra@wdc.com> Link: https://lore.kernel.org/r/20200421033336.9663-4-atish.patra@wdc.com [ardb: - move hartid fetch into check_platform_features() - use image_size not reserve_size - select ISA_C - do not use dram_base] Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>	2020-10-02 14:31:21 -07:00