linux-kernel - [PATCH 1/7] um: allow disabling NO

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Message-Id: <20210223161449.5fbbdace8fea.I7b2fad8378e4fde7f26ef06a03980ae2807d81c9@changeid>
Date:   Tue, 23 Feb 2021 16:27:01 +0100
From:   Johannes Berg <johannes@...solutions.net>
To:     linux-um@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...nel.org>,
        Johannes Berg <johannes.berg@...el.com>
Subject: [PATCH 1/7] um: allow disabling NO_IOMEM

From: Johannes Berg <johannes.berg@...el.com>

Adjust the kconfig a little to allow disabling NO_IOMEM in UML. To
make an "allyesconfig" with CONFIG_NO_IOMEM=n build, adjust a few
Kconfig things elsewhere and add dummy asm/fb.h and asm/vga.h files.

Signed-off-by: Johannes Berg <johannes.berg@...el.com>
---
 arch/um/Kconfig                |  4 ++++
 arch/um/include/asm/fb.h       | 15 +++++++++++++++
 arch/um/include/asm/vga.h      |  9 +++++++++
 drivers/input/Kconfig          |  1 -
 drivers/input/gameport/Kconfig |  1 +
 drivers/input/joystick/Kconfig |  1 +
 drivers/tty/Kconfig            |  5 ++---
 drivers/video/console/Kconfig  |  2 +-
 8 files changed, 33 insertions(+), 5 deletions(-)
 create mode 100644 arch/um/include/asm/fb.h
 create mode 100644 arch/um/include/asm/vga.h

diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index c3030db3325f..20b0640e01b8 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -26,6 +26,10 @@ config MMU
 	default y
 
 config NO_IOMEM
+	bool "disable IOMEM" if EXPERT
+	default y
+
+config NO_IOPORT_MAP
 	def_bool y
 
 config ISA
diff --git a/arch/um/include/asm/fb.h b/arch/um/include/asm/fb.h
new file mode 100644
index 000000000000..f8fa5a6b43b5
--- /dev/null
+++ b/arch/um/include/asm/fb.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_UM_FB_H
+#define _ASM_UM_FB_H
+
+static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
+                                unsigned long off)
+{
+}
+
+static inline int fb_is_primary_device(struct fb_info *info)
+{
+	return 0;
+}
+
+#endif /* _ASM_UM_FB_H */
diff --git a/arch/um/include/asm/vga.h b/arch/um/include/asm/vga.h
new file mode 100644
index 000000000000..0b0e73ccdb28
--- /dev/null
+++ b/arch/um/include/asm/vga.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_UM_VGA_H
+#define _ASM_UM_VGA_H
+
+#define VGA_MAP_MEM(x, s)	((unsigned long) ioremap(x, s))
+#define vga_readb(a)		readb((u8 __iomem *)(a))
+#define vga_writeb(v,a)		writeb(v, (u8 __iomem *)(a))
+
+#endif /* _ASM_UM_VGA_H */
diff --git a/drivers/input/Kconfig b/drivers/input/Kconfig
index ec0e861f185f..5baebf62df33 100644
--- a/drivers/input/Kconfig
+++ b/drivers/input/Kconfig
@@ -4,7 +4,6 @@
 #
 
 menu "Input device support"
-	depends on !UML
 
 config INPUT
 	tristate "Generic input layer (needed for keyboard, mouse, ...)" if EXPERT
diff --git a/drivers/input/gameport/Kconfig b/drivers/input/gameport/Kconfig
index 4761795cb49f..5a2c2fb3217d 100644
--- a/drivers/input/gameport/Kconfig
+++ b/drivers/input/gameport/Kconfig
@@ -4,6 +4,7 @@
 #
 config GAMEPORT
 	tristate "Gameport support"
+	depends on !UML
 	help
 	  Gameport support is for the standard 15-pin PC gameport. If you
 	  have a joystick, gamepad, gameport card, a soundcard with a gameport
diff --git a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig
index b080f0cfb068..6a03a1f0cd5f 100644
--- a/drivers/input/joystick/Kconfig
+++ b/drivers/input/joystick/Kconfig
@@ -4,6 +4,7 @@
 #
 menuconfig INPUT_JOYSTICK
 	bool "Joysticks/Gamepads"
+	depends on !UML
 	help
 	  If you have a joystick, 6dof controller, gamepad, steering wheel,
 	  weapon control system or something like that you can say Y here
diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig
index e15cd6b5bb99..26648daaaee2 100644
--- a/drivers/tty/Kconfig
+++ b/drivers/tty/Kconfig
@@ -12,9 +12,8 @@ if TTY
 
 config VT
 	bool "Virtual terminal" if EXPERT
-	depends on !UML
 	select INPUT
-	default y
+	default y if !UML
 	help
 	  If you say Y here, you will get support for terminal devices with
 	  display and keyboard devices. These are called "virtual" because you
@@ -78,7 +77,7 @@ config VT_CONSOLE_SLEEP
 
 config HW_CONSOLE
 	bool
-	depends on VT && !UML
+	depends on VT
 	default y
 
 config VT_HW_CONSOLE_BINDING
diff --git a/drivers/video/console/Kconfig b/drivers/video/console/Kconfig
index ee33b8ec62bb..840d9813b0bc 100644
--- a/drivers/video/console/Kconfig
+++ b/drivers/video/console/Kconfig
@@ -9,7 +9,7 @@ config VGA_CONSOLE
 	bool "VGA text console" if EXPERT || !X86
 	depends on !4xx && !PPC_8xx && !SPARC && !M68K && !PARISC &&  !SUPERH && \
 		(!ARM || ARCH_FOOTBRIDGE || ARCH_INTEGRATOR || ARCH_NETWINDER) && \
-		!ARM64 && !ARC && !MICROBLAZE && !OPENRISC && !NDS32 && !S390
+		!ARM64 && !ARC && !MICROBLAZE && !OPENRISC && !NDS32 && !S390 && !UML
 	default y
 	help
 	  Saying Y here will allow you to use Linux in text mode through a
-- 
2.26.2