Re: [Qemu-devel] [PATCH 42/52] i386: express dependencies with Kconfig

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Hi Paolo,

On 1/25/19 11:07 AM, Paolo Bonzini wrote:
> This way, the default-configs file only need to specify the boards
> and any optional devices.
> 
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> Signed-off-by: Yang Zhong <yang.zhong@intel.com>
> Message-Id: <20190123065618.3520-37-yang.zhong@intel.com>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>  default-configs/i386-softmmu.mak | 44 ++++++--------------------------
>  hw/acpi/Kconfig                  |  3 +++
>  hw/i2c/Makefile.objs             |  2 +-
>  hw/i386/Kconfig                  | 54 ++++++++++++++++++++++++++++++++++++++++
>  hw/isa/Kconfig                   |  1 +
>  hw/pci-host/Kconfig              |  4 +++
>  hw/tpm/Kconfig                   |  2 ++
>  7 files changed, 73 insertions(+), 37 deletions(-)
> 
> diff --git a/default-configs/i386-softmmu.mak b/default-configs/i386-softmmu.mak
> index 8e6a810..9eb9a5e 100644
> --- a/default-configs/i386-softmmu.mak
> +++ b/default-configs/i386-softmmu.mak
> @@ -1,11 +1,6 @@
>  # Default configuration for i386-softmmu
>  
> -CONFIG_PCI=y
> -CONFIG_PCI_DEVICES=y
> -CONFIG_ISA_BUS=y
>  include hyperv.mak
> -CONFIG_VGA_ISA=y
> -CONFIG_VMWARE_VGA=y
>  CONFIG_VMXNET3_PCI=y
>  CONFIG_VIRTIO_VGA=y
>  CONFIG_IPMI=y
> @@ -13,49 +8,26 @@ CONFIG_IPMI_LOCAL=y
>  CONFIG_IPMI_EXTERN=y
>  CONFIG_ISA_IPMI_KCS=y
>  CONFIG_ISA_IPMI_BT=y
> -CONFIG_I8254=y
> -CONFIG_ACPI=y
> -CONFIG_ACPI_X86=y
> -CONFIG_ACPI_X86_ICH=y
> -CONFIG_ACPI_MEMORY_HOTPLUG=y
> -CONFIG_ACPI_CPU_HOTPLUG=y
> -CONFIG_APM=y
> -CONFIG_I8257=y
> -CONFIG_IDE_ISA=y
> -CONFIG_IDE_PIIX=y
> +
> +# Optional devices:
> +#
>  CONFIG_HPET=y
>  CONFIG_APPLESMC=y
> -CONFIG_I8259=y
>  CONFIG_PFLASH_CFI01=y
> -CONFIG_MC146818RTC=y
> -CONFIG_PCI_PIIX=y
> -CONFIG_ISA_DEBUG=y
>  CONFIG_ISA_TESTDEV=y
> -CONFIG_VMPORT=y
>  CONFIG_SGA=y
> -CONFIG_LPC_ICH9=y
> -CONFIG_PCI_EXPRESS=y
> -CONFIG_PCI_EXPRESS_Q35=y
> -CONFIG_APIC=y
> -CONFIG_IOAPIC=y
>  CONFIG_PVPANIC=y
>  CONFIG_MEM_DEVICE=y
> -CONFIG_DIMM=y
>  CONFIG_NVDIMM=y
>  CONFIG_ACPI_NVDIMM=y
> -CONFIG_XIO3130=y
> -CONFIG_IOH3420=y
> -CONFIG_I82801B11=y
> -CONFIG_SMBIOS=y
>  CONFIG_PXB=y
>  CONFIG_ACPI_VMGENID=y
> -CONFIG_ACPI_SMBUS=y
>  CONFIG_SMBUS_EEPROM=y
> -CONFIG_FW_CFG_DMA=y
>  CONFIG_I2C=y
> -CONFIG_VTD=y
> -CONFIG_AMD_IOMMU=y
> -CONFIG_PAM=y
> -CONFIG_PC=y
> +CONFIG_PCI_DEVICES=y
> +
> +# Boards:
> +#
> +CONFIG_ISAPC=y
>  CONFIG_I440FX=y
>  CONFIG_Q35=y
> diff --git a/hw/acpi/Kconfig b/hw/acpi/Kconfig
> index c485a34..035a28f 100644
> --- a/hw/acpi/Kconfig
> +++ b/hw/acpi/Kconfig
> @@ -3,15 +3,18 @@ config ACPI
>  
>  config ACPI_X86
>      bool
> +    select ACPI
>  
>  config ACPI_X86_ICH
>      bool
> +    select ACPI_X86
>  
>  config ACPI_CPU_HOTPLUG
>      bool
>  
>  config ACPI_MEMORY_HOTPLUG
>      bool
> +    select MEM_DEVICE
>  
>  config ACPI_NVDIMM
>      bool
> diff --git a/hw/i2c/Makefile.objs b/hw/i2c/Makefile.objs
> index 61ac50a..ff22aa6 100644
> --- a/hw/i2c/Makefile.objs
> +++ b/hw/i2c/Makefile.objs
> @@ -2,7 +2,7 @@ common-obj-$(CONFIG_I2C) += core.o smbus.o
>  common-obj-$(CONFIG_SMBUS_EEPROM) += smbus_eeprom.o
>  common-obj-$(CONFIG_DDC) += i2c-ddc.o
>  common-obj-$(CONFIG_VERSATILE_I2C) += versatile_i2c.o
> -common-obj-$(CONFIG_ACPI_X86) += smbus_ich9.o
> +common-obj-$(CONFIG_ACPI_X86_ICH) += smbus_ich9.o
>  common-obj-$(CONFIG_ACPI_SMBUS) += pm_smbus.o
>  common-obj-$(CONFIG_BITBANG_I2C) += bitbang_i2c.o
>  common-obj-$(CONFIG_EXYNOS4) += exynos4210_i2c.o
> diff --git a/hw/i386/Kconfig b/hw/i386/Kconfig
> index ff41be3..8814b7c 100644
> --- a/hw/i386/Kconfig
> +++ b/hw/i386/Kconfig
> @@ -5,20 +5,73 @@ config SEV
>  config PC
>      bool
>  
> +config PC
> +    bool
> +    select ISA_DEBUG
> +    select I8259
> +    select I8254
> +    select PCSPK
> +    select I82374
> +    select I8257
> +    select MC146818RTC
> +
> +config PC_PCI
> +    bool
> +    select APIC
> +    select IOAPIC
> +    select APM
> +    select PC
> +
> +config PC_ACPI
> +    bool
> +    select ACPI_X86
> +    select ACPI_CPU_HOTPLUG
> +    select ACPI_MEMORY_HOTPLUG
> +    depends on ACPI_SMBUS
> +
>  config I440FX
>      bool
> +    select PC_PCI
> +    select PC_ACPI
> +    select ACPI_SMBUS
> +    select PCI_PIIX
> +    select FDC
> +    select IDE_PIIX
> +    select DIMM
> +    select SMBIOS
> +    select VMPORT
> +    select VMMOUSE
> +    select FW_CFG_DMA
>  
>  config ISAPC
>      bool
>      select ISA_BUS
> +    select PC
> +    select IDE_ISA
> +    select VGA_ISA
> +    # FIXME: it is in the same file as i440fx, and does not compile
> +    # if separated
> +    depends on I440FX
>  
>  config Q35
>      bool
> +    select PC_PCI
> +    select PC_ACPI
> +    select PCI_EXPRESS_Q35
> +    select LPC_ICH9
> +    select AHCI
> +    select DIMM
> +    select SMBIOS
> +    select VMPORT
> +    select VMMOUSE
> +    select FW_CFG_DMA

This lacks a DISPLAY dependency?

$ i386-softmmu/qemu-system-i386 -M q35
qemu-system-i386: Unknown device 'VGA' for bus 'PCIE'
Aborted (core dumped)

PCIDevice *pci_vga_init(PCIBus *bus)
{
    switch (vga_interface_type) {
    case VGA_CIRRUS:
        return pci_create_simple(bus, -1, "cirrus-vga");
    case VGA_QXL:
        return pci_create_simple(bus, -1, "qxl-vga");
    case VGA_STD:
        return pci_create_simple(bus, -1, "VGA");
    case VGA_VMWARE:
        return pci_create_simple(bus, -1, "vmware-svga");
    case VGA_VIRTIO:
        return pci_create_simple(bus, -1, "virtio-vga");
    case VGA_NONE:
    default: /* Other non-PCI types. Checking for unsupported types is
already
                done in vl.c. */
        return NULL;
    }
}

If so, how to express "at least one of *TYPE"?

>  
>  config VTD
> +    default y if Q35
>      bool
>  
>  config AMD_IOMMU
> +    default y if Q35
>      bool
>  
>  config VMPORT
> @@ -26,3 +79,4 @@ config VMPORT
>  
>  config VMMOUSE
>      bool
> +    depends on VMPORT
> diff --git a/hw/isa/Kconfig b/hw/isa/Kconfig
> index af68af9..6f0812d 100644
> --- a/hw/isa/Kconfig
> +++ b/hw/isa/Kconfig
> @@ -27,4 +27,5 @@ config SMC37C669
>  config LPC_ICH9
>      bool
>      select ISA_BUS
> +    select ACPI_SMBUS
>      select ACPI_X86_ICH
> diff --git a/hw/pci-host/Kconfig b/hw/pci-host/Kconfig
> index c01812a..ff4080c 100644
> --- a/hw/pci-host/Kconfig
> +++ b/hw/pci-host/Kconfig
> @@ -27,10 +27,14 @@ config PCI_SABRE
>  
>  config PCI_PIIX
>      bool
> +    select PCI
> +    select PAM
> +    select ISA_BUS
>  
>  config PCI_EXPRESS_Q35
>      bool
>      select PCI_EXPRESS
> +    select PAM
>  
>  config PCI_EXPRESS_GENERIC_BRIDGE
>      bool
> diff --git a/hw/tpm/Kconfig b/hw/tpm/Kconfig
> index db57388..8a63597 100644
> --- a/hw/tpm/Kconfig
> +++ b/hw/tpm/Kconfig
> @@ -8,6 +8,8 @@ config TPM_TIS
>  
>  config TPM_CRB
>      bool
> +    default y
> +    depends on TPM && PC
>  
>  config TPM_PASSTHROUGH
>      bool
>