Re: [PATCH] hw/usb: Introduce Kconfig switches for the CCID card devices

[Paolo Bonzini <pbonzini@redhat.com>]

On 10/12/19 14:27, Philippe Mathieu-Daudé wrote:
> On 12/10/19 9:11 AM, Thomas Huth wrote:
>> On 10/12/2019 08.43, Philippe Mathieu-Daudé wrote:
>>> On 12/10/19 8:20 AM, Thomas Huth wrote:
>>>> In our downstream distribution of QEMU, we need more fine-grained
>>>> control on the set of CCID card devices that we want to include.
>>>> So let's introduce some proper Kconfig switches that it is easier
>>>> to disable them without modifying the corresponding Makefile.objs.
>>>>
>>>> Signed-off-by: Thomas Huth <thuth@redhat.com>
>>>> ---
>>>>    hw/usb/Kconfig       | 10 ++++++++++
>>>>    hw/usb/Makefile.objs |  7 +++++--
>>>>    2 files changed, 15 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/hw/usb/Kconfig b/hw/usb/Kconfig
>>>> index 555e09377b..1358847eba 100644
>>>> --- a/hw/usb/Kconfig
>>>> +++ b/hw/usb/Kconfig
>>>> @@ -96,3 +96,13 @@ config USB_STORAGE_MTP
>>>>        bool
>>>>        default y
>>>>        depends on USB
>>>> +
>>>> +config CCID_PASSTHRU
>>>> +    bool
>>>> +    default y
>>>> +    depends on USB_SMARTCARD
>>>> +
>>>> +config CCID_EMULATED
>>>> +    bool
>>>> +    default y
>>>> +    depends on USB_SMARTCARD
>>>> diff --git a/hw/usb/Makefile.objs b/hw/usb/Makefile.objs
>>>> index 303ac084a0..ebe103fb3d 100644
>>>> --- a/hw/usb/Makefile.objs
>>>> +++ b/hw/usb/Makefile.objs
>>>> @@ -29,11 +29,14 @@ common-obj-$(CONFIG_USB_BLUETOOTH)    +=
>>>> dev-bluetooth.o
>>>>      ifeq ($(CONFIG_USB_SMARTCARD),y)
>>>>    common-obj-y                          += dev-smartcard-reader.o
>>>> -common-obj-$(CONFIG_SMARTCARD)        += smartcard.mo
>>>> -smartcard.mo-objs := ccid-card-passthru.o ccid-card-emulated.o
>>>> +ifeq ($(CONFIG_SMARTCARD),y)
>>>
>>> We don't need the 'ifeq ($(CONFIG_SMARTCARD),y)' ... endif anymore.
>>
>> I think we do. Both files #include <libcacard.h> thus can only be
>> compiled if CONFIG_SMARTCARD has been set.
>> Don't mix CONFIG_SMARTCARD up with CONFIG_USB_SMARTCARD - these are two
>> different switches!
> 
> OK I missed SMARTCARD is not in Kconfig.host.
> 
> What about adding that to your patch and remove the ifeq():
> 
> -- >8 --
> diff --git a/Kconfig.host b/Kconfig.host
> index bb6e116e2a..b532358854 100644
> --- a/Kconfig.host
> +++ b/Kconfig.host
> @@ -35,3 +35,6 @@ config VIRTFS
> 
>  config PVRDMA
>      bool
> +
> +config SMARTCARD
> +    bool
> diff --git a/hw/usb/Kconfig b/hw/usb/Kconfig
> index 555e09377b..b3292a5cc9 100644
> --- a/hw/usb/Kconfig
> +++ b/hw/usb/Kconfig
> @@ -90,7 +90,7 @@ config USB_BLUETOOTH
>  config USB_SMARTCARD
>      bool
>      default y
> -    depends on USB
> +    depends on SMARTCARD && USB
> 
>  config USB_STORAGE_MTP
>      bool

Yes, this is a good idea.

Paolo

> ---
> 
>>>> +common-obj-$(call
>>>> lor,$(CONFIG_CCID_PASSTHRU),$(CONFIG_CCID_EMULATED)) += smartcard.mo
>>>> +smartcard.mo-objs := $(call
>>>> lif,$(CONFIG_CCID_PASSTHRU),ccid-card-passthru.o) \
>>>> +                     $(call
>>>> lif,$(CONFIG_CCID_EMULATED),ccid-card-emulated.o)
>>>>    smartcard.mo-cflags := $(SMARTCARD_CFLAGS)
>>>>    smartcard.mo-libs := $(SMARTCARD_LIBS)
>>>>    endif
>>>> +endif
>>>>      ifeq ($(CONFIG_POSIX),y)
>>>>    common-obj-$(CONFIG_USB_STORAGE_MTP)  += dev-mtp.o
>>>>
>>>
>>
>