[PATCH v2] riscv/purgatory: align riscv_kernel_entry

[Daniel Maslowski]

When alignment handling is delegated to the kernel, everything must be
word-aligned in purgatory, since the trap handler is then set to the
kexec one. Without the alignment, hitting the exception would
ultimately crash. On other occasions, the kernel's handler would take
care of exceptions.
This has been tested on a JH7110 SoC with oreboot and its SBI delegating
unaligned access exceptions and the kernel configured to handle them.

Fixes: 736e30af583fb6e0e2b8211b894ff99dea0f1ee7
Signed-off-by: Daniel Maslowski <cyrevolt at gmail.com>
---
 arch/riscv/purgatory/entry.S | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/riscv/purgatory/entry.S b/arch/riscv/purgatory/entry.S
index 5bcf3af903da..0e6ca6d5ae4b 100644
--- a/arch/riscv/purgatory/entry.S
+++ b/arch/riscv/purgatory/entry.S
@@ -7,6 +7,7 @@
  * Author: Li Zhengyu (lizhengyu3 at huawei.com)
  *
  */
+#include <asm/asm.h>
 #include <linux/linkage.h>
 
 .text
@@ -34,6 +35,7 @@ SYM_CODE_END(purgatory_start)
 
 .data
 
+.align LGREG
 SYM_DATA(riscv_kernel_entry, .quad 0)
 
 .end
-- 
2.45.2