[PATCH] include: sbi_platform: Increase default stack size

[Vivian Wang]

sbi_misaligned_v_ld_emulator() has a local buffer (namely mask) which is
8192 bytes in size, so the default stack size is not enough. Double it
to 16384.

This stack overflow can be observed by any S-mode software and leads to
M-mode crash or unexpected behavior, as long as the S-mode software does
not enable FWFT misaligned delegation [1]. This may be considered a
temporary fix until further fixes are made to misaligned handling [2].

Link: https://lore.kernel.org/linux-riscv/nrvt74qnojaubiwjo37ums4lnclu466hovwrhmtbag6f5uhrql@q6msoe2oto4b # [1]
Link: https://lore.kernel.org/opensbi/20260210094044.72591-1-ganboing@gmail.com # [2]
Signed-off-by: Vivian Wang <wangruikang at iscas.ac.cn>
---
 include/sbi/sbi_platform.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/sbi/sbi_platform.h b/include/sbi/sbi_platform.h
index fe382b56..ec1e0f73 100644
--- a/include/sbi/sbi_platform.h
+++ b/include/sbi/sbi_platform.h
@@ -160,7 +160,7 @@ struct sbi_platform_operations {
 };
 
 /** Platform default per-HART stack size for exception/interrupt handling */
-#define SBI_PLATFORM_DEFAULT_HART_STACK_SIZE	8192
+#define SBI_PLATFORM_DEFAULT_HART_STACK_SIZE	16384
 
 /** Platform default heap size */
 #define SBI_PLATFORM_DEFAULT_HEAP_SIZE(__num_hart)	\
-- 
2.54.0