[PATCH v3 2/4] riscv: Add support for kexec handover (KHO)

[Chen Pei]

The generic handover paths are already in place on RISC-V: the outgoing
kernel publishes the handover FDT and the bootmem list in /chosen of the
DTB built by of_kexec_alloc_and_setup_fdt(), and the incoming kernel
picks both up while scanning that node. Only the architecture symbol is
missing.

Set it to 64BIT && MMU: ARCH_SUPPORTS_KEXEC_FILE is already 64BIT only,
and KEXEC_HANDOVER selects CMA, which depends on MMU.

Signed-off-by: Chen Pei <cp0613 at linux.alibaba.com>
---
 arch/riscv/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index bde1f1885038..bffef6b903e1 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -1125,6 +1125,9 @@ config ARCH_SELECTS_KEXEC_FILE
 config ARCH_SUPPORTS_KEXEC_PURGATORY
 	def_bool ARCH_SUPPORTS_KEXEC_FILE
 
+config ARCH_SUPPORTS_KEXEC_HANDOVER
+	def_bool 64BIT && MMU
+
 config ARCH_SUPPORTS_CRASH_DUMP
 	def_bool y
 
-- 
2.50.1