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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
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
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 \
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
QEMU is a generic and open source machine emulator and
virtualizer.
@ -38,12 +48,14 @@ comment "Emulators selection"
config BR2_PACKAGE_HOST_QEMU_SYSTEM_MODE
bool "Enable system emulation"
depends on BR2_PACKAGE_HOST_QEMU_SYSTEM_ARCH_SUPPORTS
help
Enables the build of the system emulator, which allows to
boot an entire system in Qemu.
config BR2_PACKAGE_HOST_QEMU_LINUX_USER_MODE
bool "Enable Linux user-land emulation"
depends on BR2_PACKAGE_HOST_QEMU_USER_ARCH_SUPPORTS
help
Enables the build of the user-land emulator, which allows to
run user-space applications.