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qemu: introduce BR2_PACKAGE_HOST_QEMU_{SYSTEM, USER}_ARCH_SUPPORTS

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Not all architectures are supported by both the system emulation and
user-mode emulation in Qemu, so a single
BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS doesn't work very well.

Therefore, this commit introduces the
BR2_PACKAGE_HOST_QEMU_{SYSTEM,USER}_ARCH_SUPPORTS hidden options. We
keep the BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS option for the (numerous)
architectures supported by both system emulation and user-mode
emulation.

The 'select' logic to make sure that at least either system emulation
or user-mode emulation is selected is reworked, and done carefully to
avoid recursive Kconfig dependencies.

For now BR2_PACKAGE_HOST_QEMU_SYSTEM_ARCH_SUPPORTS and
BR2_PACKAGE_HOST_QEMU_USER_ARCH_SUPPORTS are the same, but they will
become different in a follow-up commit.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Thomas Petazzoni 2018-04-01 18:36:35 +02:00
parent 65e05cd914
commit d7f74dced9
1 changed files with 14 additions and 2 deletions
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16
package/qemu/Config.in.host
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@ -19,11 +19,21 @@ config BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS
default y if BR2_x86_64 default y if BR2_x86_64
depends on !BR2_powerpc_620 && !BR2_powerpc_630 && !BR2_powerpc_970 depends on !BR2_powerpc_620 && !BR2_powerpc_630 && !BR2_powerpc_970
config BR2_PACKAGE_HOST_QEMU_SYSTEM_ARCH_SUPPORTS
bool
default y if BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS
config BR2_PACKAGE_HOST_QEMU_USER_ARCH_SUPPORTS
bool
default y if BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS
config BR2_PACKAGE_HOST_QEMU config BR2_PACKAGE_HOST_QEMU
bool "host qemu" bool "host qemu"
depends on BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS depends on BR2_PACKAGE_HOST_QEMU_SYSTEM_ARCH_SUPPORTS || BR2_PACKAGE_HOST_QEMU_USER_ARCH_SUPPORTS
select BR2_PACKAGE_HOST_QEMU_LINUX_USER_MODE \ select BR2_PACKAGE_HOST_QEMU_LINUX_USER_MODE \
if !BR2_PACKAGE_HOST_QEMU_SYSTEM_MODE if !BR2_PACKAGE_HOST_QEMU_SYSTEM_MODE && BR2_PACKAGE_HOST_QEMU_USER_ARCH_SUPPORTS
select BR2_PACKAGE_HOST_QEMU_SYSTEM_MODE \
if !BR2_PACKAGE_HOST_QEMU_USER_ARCH_SUPPORTS
help help
QEMU is a generic and open source machine emulator and QEMU is a generic and open source machine emulator and
virtualizer. virtualizer.
@ -38,12 +48,14 @@ comment "Emulators selection"
config BR2_PACKAGE_HOST_QEMU_SYSTEM_MODE config BR2_PACKAGE_HOST_QEMU_SYSTEM_MODE
bool "Enable system emulation" bool "Enable system emulation"
depends on BR2_PACKAGE_HOST_QEMU_SYSTEM_ARCH_SUPPORTS
help help
Enables the build of the system emulator, which allows to Enables the build of the system emulator, which allows to
boot an entire system in Qemu. boot an entire system in Qemu.
config BR2_PACKAGE_HOST_QEMU_LINUX_USER_MODE config BR2_PACKAGE_HOST_QEMU_LINUX_USER_MODE
bool "Enable Linux user-land emulation" bool "Enable Linux user-land emulation"
depends on BR2_PACKAGE_HOST_QEMU_USER_ARCH_SUPPORTS
help help
Enables the build of the user-land emulator, which allows to Enables the build of the user-land emulator, which allows to
run user-space applications. run user-space applications.