diff options
Diffstat (limited to 'docs/devel/kconfig.rst')
| -rw-r--r-- | docs/devel/kconfig.rst | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/docs/devel/kconfig.rst b/docs/devel/kconfig.rst index a1cdbec751..69674d008a 100644 --- a/docs/devel/kconfig.rst +++ b/docs/devel/kconfig.rst @@ -192,11 +192,15 @@ declares its dependencies in different ways: no directive and are not used in the Makefile either; they only appear as conditions for ``default y`` directives. - QEMU currently has two device groups, ``PCI_DEVICES`` and - ``TEST_DEVICES``. PCI devices usually have a ``default y if + QEMU currently has three device groups, ``PCI_DEVICES``, ``I2C_DEVICES``, + and ``TEST_DEVICES``. PCI devices usually have a ``default y if PCI_DEVICES`` directive rather than just ``default y``. This lets some boards (notably s390) easily support a subset of PCI devices, for example only VFIO (passthrough) and virtio-pci devices. + ``I2C_DEVICES`` is similar to ``PCI_DEVICES``. It contains i2c devices + that users might reasonably want to plug in to an i2c bus on any + board (and not ones which are very board-specific or that need + to be wired up in a way that can't be done on the command line). ``TEST_DEVICES`` instead is used for devices that are rarely used on production virtual machines, but provide useful hooks to test QEMU or KVM. @@ -301,7 +305,7 @@ and also listed as follows in the top-level meson.build's host_kconfig variable:: host_kconfig = \ - ('CONFIG_TPM' in config_host ? ['CONFIG_TPM=y'] : []) + \ + (have_tpm ? ['CONFIG_TPM=y'] : []) + \ ('CONFIG_SPICE' in config_host ? ['CONFIG_SPICE=y'] : []) + \ (have_ivshmem ? ['CONFIG_IVSHMEM=y'] : []) + \ ... |