Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/SiFive/sifive_hifive_unmatched_a00/sifive_spi0_1/txmark#0x0
Tx FIFO watermark
Transmit watermark. The reset value is 1 for flash-enabled controllers, 0 otherwise.
https://github.com/cmsis-svd/cmsis-svd-data