platform: goldfish: move the separate 'default' propery for CONFIG_GOLDFISH

Currently, there are two entries for CONFIG_GOLDFISH.

In arch/x86/Kconfig:

config GOLDFISH
def_bool y

platform: goldfish: move the separate 'default' propery for CONFIG_GOLDFISH

Currently, there are two entries for CONFIG_GOLDFISH.

In arch/x86/Kconfig:

config GOLDFISH
def_bool y
depends on X86_GOLDFISH

In drivers/platform/goldfish/Kconfig:

menuconfig GOLDFISH
bool "Platform support for Goldfish virtual devices"
depends on HAS_IOMEM && HAS_DMA

While Kconfig allows multiple entries, it generally leads to tricky
code.

Prior to commit bd2f348db503 ("goldfish: refactor goldfish platform
configs"), CONFIG_GOLDFISH was an alias of CONFIG_X86_GOLDFISH.

After the mentioned commit added the second entry with a user prompt,
the former provides the 'default' property that is effective only when
X86_GOLDFISH=y.

Merge them tegether to clarify how it has worked in the past 8 years.

Cc: Greg Hackmann <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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platform: goldfish: Allow goldfish drivers for archs with IOMEM and DMA

We don't need explicit dependency of Goldfish kconfig option on various
architectures. Instead, the Goldfish kconfig option sh

platform: goldfish: Allow goldfish drivers for archs with IOMEM and DMA

We don't need explicit dependency of Goldfish kconfig option on various
architectures. Instead, the Goldfish kconfig option should only depend
on HAS_IOMEM and HAS_DMA which is sufficient for all Goldfish devices.

Signed-off-by: Anup Patel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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treewide: Add SPDX license identifier - Makefile/Kconfig

Add SPDX license identifiers to all Make/Kconfig files which:

- Have no license information of any form

These files fall under the project

treewide: Add SPDX license identifier - Makefile/Kconfig

Add SPDX license identifiers to all Make/Kconfig files which:

- Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

GPL-2.0-only

Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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drivers: platform: goldfish: fix the checkpatch complain in Kconfig

prefer 'help' over '---help---' for new help texts

Signed-off-by: Roman Kiryanov <[email protected]>
Signed-off-by: Greg Kroah-Hart

drivers: platform: goldfish: fix the checkpatch complain in Kconfig

prefer 'help' over '---help---' for new help texts

Signed-off-by: Roman Kiryanov <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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platform: goldfish: Retire pdev_bus

Not used by goldfish.

Signed-off-by: Roman Kiryanov <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

goldfish: Fix build error of missing ioremap on UM

Add missing HAS_IOMEM dependency to fix the allyesconfig build error on
ARCH=um (for x86_64):

drivers/platform/goldfish/pdev_bus.c: In function ‘g

goldfish: Fix build error of missing ioremap on UM

Add missing HAS_IOMEM dependency to fix the allyesconfig build error on
ARCH=um (for x86_64):

drivers/platform/goldfish/pdev_bus.c: In function ‘goldfish_pdev_bus_probe’:
drivers/platform/goldfish/pdev_bus.c:191:18: error: implicit declaration of function ‘ioremap’ [-Werror=implicit-function-declaration]
pdev_bus_base = ioremap(pdev_bus_addr, pdev_bus_len);

Signed-off-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Alan Cox <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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Enable platform support for Goldfish virtual devices

Enable CONFIG_GOLDFISH for MIPS platforms.

Signed-off-by: Miodrag Dinic <[email protected]>
Signed-off-by: Jin Qian <[email protected]>

Enable platform support for Goldfish virtual devices

Enable CONFIG_GOLDFISH for MIPS platforms.

Signed-off-by: Miodrag Dinic <[email protected]>
Signed-off-by: Jin Qian <[email protected]>
Signed-off-by: Alan Cox <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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goldfish: refactor goldfish platform configs

On new virtual devices, the goldfish virtual bus can be replaced with
autoprobing infrastructure like Device Tree. Refactor the goldfish
kernel configs

goldfish: refactor goldfish platform configs

On new virtual devices, the goldfish virtual bus can be replaced with
autoprobing infrastructure like Device Tree. Refactor the goldfish
kernel configs to better accommodate this.

Move the goldfish platform into a menuconfig in the style of the chrome
platform, and separate the goldfish bus into its own config option.

Signed-off-by: Greg Hackmann <[email protected]>
Signed-off-by: Jin Qian <[email protected]>
[Corrected a tristate to bool]
Signed-off-by: Alan Cox <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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goldfish: add QEMU pipe driver

A QEMU pipe is a very fast communication channel between the
guest system and the emulator. Usage from the guest is simply
something like;

// connect to special dev

goldfish: add QEMU pipe driver

A QEMU pipe is a very fast communication channel between the
guest system and the emulator. Usage from the guest is simply
something like;

// connect to special device
fd = open("/dev/qemu_pipe", O_RDWR);

// tell which service we want to talk to (must be zero-terminated)
write(fd, "pipeName", strlen("pipeName")+1);

// do read()/write() through fd now
...

// close channel
close(fd);

Signed-off-by: David 'Digit' Turner <[email protected]>
[Added support for parameter buffers for speed]
igned-off-by: Xin, Xiaohui <[email protected]>
Signed-off-by: Jiang, Yunhong <[email protected]>
Signed-off-by: Nakajima, Jun <[email protected]>
[Ported to 3.6]
Signed-off-by: Tom Keel <[email protected]>
[Ported to 3.7, moved to platform/goldfish]
Signed-off-by: Alan Cox <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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