Re: [Qemu-devel] [PATCHv3 2/4] Split serial-isa into its own config option

[Thomas Huth <thuth@redhat.com>]

On 15.01.2016 13:21, David Gibson wrote:
> At present, the core device model code for 8250-like serial ports
> (serial.c) and the code for serial ports attached to ISA-style legacy IO
> (serial-isa.c) are both controlled by the CONFIG_SERIAL variable.
> 
> There are lots and lots of embedded platforms that have 8250-like serial
> ports but have never had anything resembling ISA legacy IO.  Therefore,
> split serial-isa into its own CONFIG_SERIAL_ISA option so it can be
> disabled for platforms where it's not appropriate.
> 
> For now, I enabled CONFIG_SERIAL_ISA in every default-config where
> CONFIG_SERIAL is enabled, excepting microblaze, moxie, or32, and
> xtensa.  As best as I can tell, those platforms never used legacy ISA,
> and also don't include PCI support (which would allow connection of a
> PCI->ISA bridge and/or a southbridge including legacy ISA serial
> ports).
> 
> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
> ---
>  default-configs/alpha-softmmu.mak    | 1 +
>  default-configs/arm-softmmu.mak      | 1 +
>  default-configs/i386-softmmu.mak     | 1 +
>  default-configs/mips-softmmu.mak     | 1 +
>  default-configs/mips64-softmmu.mak   | 1 +
>  default-configs/mips64el-softmmu.mak | 1 +
>  default-configs/mipsel-softmmu.mak   | 1 +
>  default-configs/ppc-softmmu.mak      | 1 +
>  default-configs/ppc64-softmmu.mak    | 1 +
>  default-configs/ppcemb-softmmu.mak   | 1 +
>  default-configs/sh4-softmmu.mak      | 1 +
>  default-configs/sh4eb-softmmu.mak    | 1 +
>  default-configs/sparc64-softmmu.mak  | 1 +
>  default-configs/x86_64-softmmu.mak   | 1 +
>  hw/char/Makefile.objs                | 3 ++-
>  15 files changed, 16 insertions(+), 1 deletion(-)
...
> diff --git a/default-configs/ppc-softmmu.mak b/default-configs/ppc-softmmu.mak
> index d4d0f9b..13eb94f 100644
> --- a/default-configs/ppc-softmmu.mak
> +++ b/default-configs/ppc-softmmu.mak
> @@ -45,5 +45,6 @@ CONFIG_PLATFORM_BUS=y
>  CONFIG_ETSEC=y
>  CONFIG_LIBDECNUMBER=y
>  # For PReP
> +CONFIG_SERIAL_ISA=y
>  CONFIG_MC146818RTC=y
>  CONFIG_ISA_TESTDEV=y
> diff --git a/default-configs/ppc64-softmmu.mak b/default-configs/ppc64-softmmu.mak
> index 70a89d1..3e243fd 100644
> --- a/default-configs/ppc64-softmmu.mak
> +++ b/default-configs/ppc64-softmmu.mak
> @@ -50,6 +50,7 @@ CONFIG_LIBDECNUMBER=y
>  CONFIG_XICS=$(CONFIG_PSERIES)
>  CONFIG_XICS_KVM=$(and $(CONFIG_PSERIES),$(CONFIG_KVM))
>  # For PReP
> +CONFIG_SERIAL_ISA=y
>  CONFIG_MC146818RTC=y
>  CONFIG_ISA_TESTDEV=y
>  CONFIG_MEM_HOTPLUG=y

A little bit off-topic ... but maybe we should simply "include
ppc-softmmu.mak" in ppc64-softmmu.mak since the ppc64-softmmu is
supposed to offer all the 32 bit platforms, too? Then changes like this
would only affect one file instead of two.

...
> diff --git a/hw/char/Makefile.objs b/hw/char/Makefile.objs
> index 5931cc8..be42d2f 100644
> --- a/hw/char/Makefile.objs
> +++ b/hw/char/Makefile.objs
> @@ -2,7 +2,8 @@ common-obj-$(CONFIG_IPACK) += ipoctal232.o
>  common-obj-$(CONFIG_ESCC) += escc.o
>  common-obj-$(CONFIG_PARALLEL) += parallel.o
>  common-obj-$(CONFIG_PL011) += pl011.o
> -common-obj-$(CONFIG_SERIAL) += serial.o serial-isa.o
> +common-obj-$(CONFIG_SERIAL) += serial.o
> +common-obj-$(CONFIG_SERIAL_ISA) += serial-isa.o
>  common-obj-$(CONFIG_SERIAL_PCI) += serial-pci.o
>  common-obj-$(CONFIG_VIRTIO) += virtio-console.o
>  common-obj-$(CONFIG_XILINX) += xilinx_uartlite.o

Patch looks fine to me.

Reviewed-by: Thomas Huth <thuth@redhat.com>