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From: Christoph Hellwig <hch@lst.de>
To: Palmer Dabbelt <palmer@sifive.com>,
	Paul Walmsley <paul.walmsley@sifive.com>
Cc: Damien Le Moal <damien.lemoal@wdc.com>,
	linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
	Anup Patel <anup@brainfault.org>
Subject: [PATCH 02/12] riscv: don't allow selecting SBI based drivers for M-mode
Date: Mon, 28 Oct 2019 13:10:33 +0100	[thread overview]
Message-ID: <20191028121043.22934-3-hch@lst.de> (raw)
In-Reply-To: <20191028121043.22934-1-hch@lst.de>

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>
Reviewed-by: Anup Patel <anup@brainfault.org>
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 86b7e8b0471c..b85492c42ccb 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -76,6 +76,12 @@ config ARCH_MMAP_RND_BITS_MAX
 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 67a9eb3f94ce..540142c5b7b3 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


WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Palmer Dabbelt <palmer@sifive.com>,
	Paul Walmsley <paul.walmsley@sifive.com>
Cc: Anup Patel <anup@brainfault.org>,
	Damien Le Moal <damien.lemoal@wdc.com>,
	linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH 02/12] riscv: don't allow selecting SBI based drivers for M-mode
Date: Mon, 28 Oct 2019 13:10:33 +0100	[thread overview]
Message-ID: <20191028121043.22934-3-hch@lst.de> (raw)
In-Reply-To: <20191028121043.22934-1-hch@lst.de>

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>
Reviewed-by: Anup Patel <anup@brainfault.org>
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 86b7e8b0471c..b85492c42ccb 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -76,6 +76,12 @@ config ARCH_MMAP_RND_BITS_MAX
 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 67a9eb3f94ce..540142c5b7b3 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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  parent reply	other threads:[~2019-10-28 12:10 UTC|newest]

Thread overview: 80+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-28 12:10 RISC-V nommu support v6 Christoph Hellwig
2019-10-28 12:10 ` Christoph Hellwig
2019-10-28 12:10 ` [PATCH 01/12] riscv: abstract out CSR names for supervisor vs machine mode Christoph Hellwig
2019-10-28 12:10   ` Christoph Hellwig
2019-11-05 17:56   ` Paul Walmsley
2019-11-05 17:56     ` Paul Walmsley
2019-11-05 17:57   ` Paul Walmsley
2019-11-05 17:57     ` Paul Walmsley
2019-11-05 18:02     ` Marc Zyngier
2019-11-05 18:02       ` Marc Zyngier
2019-11-12 10:38   ` Thomas Gleixner
2019-11-12 10:38     ` Thomas Gleixner
2019-11-14  7:30   ` Paul Walmsley
2019-11-14  7:30     ` Paul Walmsley
2019-10-28 12:10 ` Christoph Hellwig [this message]
2019-10-28 12:10   ` [PATCH 02/12] riscv: don't allow selecting SBI based drivers for M-mode Christoph Hellwig
2019-11-14  7:31   ` Paul Walmsley
2019-11-14  7:31     ` Paul Walmsley
2019-10-28 12:10 ` [PATCH 03/12] riscv: poison SBI calls " Christoph Hellwig
2019-10-28 12:10   ` Christoph Hellwig
2019-10-31 23:55   ` Paul Walmsley
2019-10-31 23:55     ` Paul Walmsley
2019-10-28 12:10 ` [PATCH 04/12] riscv: cleanup the default power off implementation Christoph Hellwig
2019-10-28 12:10   ` Christoph Hellwig
2019-10-31 20:49   ` Paul Walmsley
2019-10-31 20:49     ` Paul Walmsley
2019-10-31 23:56   ` Paul Walmsley
2019-10-31 23:56     ` Paul Walmsley
2019-10-28 12:10 ` [PATCH 05/12] riscv: implement remote sfence.i using IPIs Christoph Hellwig
2019-10-28 12:10   ` Christoph Hellwig
2019-10-31 23:57   ` Paul Walmsley
2019-10-31 23:57     ` Paul Walmsley
2019-10-28 12:10 ` [PATCH 06/12] riscv: add support for MMIO access to the timer registers Christoph Hellwig
2019-10-28 12:10   ` Christoph Hellwig
2019-11-05 18:01   ` Paul Walmsley
2019-11-05 18:01     ` Paul Walmsley
2019-11-12 10:39   ` Thomas Gleixner
2019-11-12 10:39     ` Thomas Gleixner
2019-11-17 23:06   ` Paul Walmsley
2019-11-17 23:06     ` Paul Walmsley
2019-10-28 12:10 ` [PATCH 07/12] riscv: provide native clint access for M-mode Christoph Hellwig
2019-10-28 12:10   ` Christoph Hellwig
2019-10-28 12:10 ` [PATCH 08/12] riscv: read the hart ID from mhartid on boot Christoph Hellwig
2019-10-28 12:10   ` Christoph Hellwig
2019-10-28 12:10 ` [PATCH 09/12] riscv: clear the instruction cache and all registers when booting Christoph Hellwig
2019-10-28 12:10   ` Christoph Hellwig
2019-11-14  7:45   ` Paul Walmsley
2019-11-14  7:45     ` Paul Walmsley
2019-10-28 12:10 ` [PATCH 10/12] riscv: add nommu support Christoph Hellwig
2019-10-28 12:10   ` Christoph Hellwig
2019-11-17 23:13   ` Paul Walmsley
2019-11-17 23:13     ` Paul Walmsley
2019-12-16 22:03     ` David Abdurachmanov
2019-12-16 22:03       ` David Abdurachmanov
2019-12-17  3:18       ` Paul Walmsley
2019-12-17  3:18         ` Paul Walmsley
2019-10-28 12:10 ` [PATCH 11/12] riscv: provide a flat image loader Christoph Hellwig
2019-10-28 12:10   ` Christoph Hellwig
2019-11-17 23:14   ` Paul Walmsley
2019-11-17 23:14     ` Paul Walmsley
2019-10-28 12:10 ` [PATCH 12/12] riscv: disable the EFI PECOFF header for M-mode Christoph Hellwig
2019-10-28 12:10   ` Christoph Hellwig
2019-10-30 20:21 ` RISC-V nommu support v6 Paul Walmsley
2019-10-30 20:21   ` Paul Walmsley
2019-10-31 15:52   ` Christoph Hellwig
2019-10-31 15:52     ` Christoph Hellwig
2019-10-31 20:13     ` Paul Walmsley
2019-10-31 20:13       ` Paul Walmsley
2019-11-23  2:19     ` Paul Walmsley
2019-11-23  2:19       ` Paul Walmsley
2019-12-11  8:42       ` Greentime Hu
2019-12-11  8:42         ` Greentime Hu
2020-02-12 12:19       ` Greentime Hu
2020-02-12 12:19         ` Greentime Hu
2019-11-11  9:47   ` Christoph Hellwig
2019-11-11  9:47     ` Christoph Hellwig
2019-11-11 17:02     ` Paul Walmsley
2019-11-11 17:02       ` Paul Walmsley
2019-11-13 13:18       ` Christoph Hellwig
2019-11-13 13:18         ` Christoph Hellwig

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