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Subject[PATCH 09/20] riscv: don't allow selecting SBI based drivers for M-mode
Date
From: Damien Le Moal <damien.lemoal@wdc.com>

When running in M-mode we can't use SBI based drivers. Add a new
CONFIG_RISCV_SBI that drivers that do SBI calls can depend on
instead.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
arch/riscv/Kconfig | 6 ++++++
drivers/tty/hvc/Kconfig | 2 +-
drivers/tty/serial/Kconfig | 2 +-
3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index e4a4bebdbcf3..86fcf608f193 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -61,6 +61,12 @@ config RISCV
config RISCV_M_MODE
bool

+# set if we are running in S-mode and can use SBI calls
+config RISCV_SBI
+ bool
+ depends on !RISCV_M_MODE
+ default y
+
config MMU
def_bool y

diff --git a/drivers/tty/hvc/Kconfig b/drivers/tty/hvc/Kconfig
index 4d22b911111f..4487a6b9acc8 100644
--- a/drivers/tty/hvc/Kconfig
+++ b/drivers/tty/hvc/Kconfig
@@ -89,7 +89,7 @@ config HVC_DCC

config HVC_RISCV_SBI
bool "RISC-V SBI console support"
- depends on RISCV
+ depends on RISCV_SBI
select HVC_DRIVER
help
This enables support for console output via RISC-V SBI calls, which
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 3083dbae35f7..530cb966092f 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -88,7 +88,7 @@ config SERIAL_EARLYCON_ARM_SEMIHOST

config SERIAL_EARLYCON_RISCV_SBI
bool "Early console using RISC-V SBI"
- depends on RISCV
+ depends on RISCV_SBI
select SERIAL_CORE
select SERIAL_CORE_CONSOLE
select SERIAL_EARLYCON
--
2.20.1
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