Re: [Xen-devel] [PATCH 26/32] hw/pci-host/piix: Move RCR_IOPORT register definition

[Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>]

On 10/18/19 11:19 AM, Aleksandar Markovic wrote:
> On Tuesday, October 15, 2019, Philippe Mathieu-Daudé <philmd@xxxxxxxxxx 
> <mailto:philmd@xxxxxxxxxx>> wrote:
>     From: Philippe Mathieu-Daudé <f4bug@xxxxxxxxx <mailto:f4bug@xxxxxxxxx>>
>
>     The RCR_IOPORT register belongs to the PIIX chipset.
>     Move the definition to "piix.h".
>
>     Signed-off-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx
>     <mailto:philmd@xxxxxxxxxx>>
>     ---
>       hw/pci-host/piix.c            | 1 +
>       include/hw/i386/pc.h          | 6 ------
>       include/hw/southbridge/piix.h | 6 ++++++
>       3 files changed, 7 insertions(+), 6 deletions(-)
>
>
> Does it make sense to add prefix PIIX_ or a similar one to the register 
> name?
Good idea, it will make the comment in hw/i386/acpi-build.c:213 cleaner:

    /* The above need not be conditional on machine type because the 
reset port
     * happens to be the same on PIIX (pc) and ICH9 (q35). */
    QEMU_BUILD_BUG_ON(ICH9_RST_CNT_IOPORT != RCR_IOPORT);

> In any case:
>
> Reviewed-by: Aleksandar Markovic <amarkovic@xxxxxxxxxxxx 
> <mailto:amarkovic@xxxxxxxxxxxx>>
Thanks!

>     diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c
>     index 3292703de7..3770575c1a 100644
>     --- a/hw/pci-host/piix.c
>     +++ b/hw/pci-host/piix.c
>     @@ -27,6 +27,7 @@
>       #include "hw/irq.h"
>       #include "hw/pci/pci.h"
>       #include "hw/pci/pci_host.h"
>     +#include "hw/southbridge/piix.h"
>       #include "hw/qdev-properties.h"
>       #include "hw/isa/isa.h"
>       #include "hw/sysbus.h"
>     diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
>     index 183326d9fe..1c20b96571 100644
>     --- a/include/hw/i386/pc.h
>     +++ b/include/hw/i386/pc.h
>     @@ -257,12 +257,6 @@ typedef struct PCII440FXState PCII440FXState;
>
>       #define TYPE_IGD_PASSTHROUGH_I440FX_PCI_DEVICE
>     "igd-passthrough-i440FX"
>
>     -/*
>     - * Reset Control Register: PCI-accessible ISA-Compatible Register
>     at address
>     - * 0xcf9, provided by the PCI/ISA bridge (PIIX3 PCI function 0,
>     8086:7000).
>     - */
>     -#define RCR_IOPORT 0xcf9
>     -
>       PCIBus *i440fx_init(const char *host_type, const char *pci_type,
>                           PCII440FXState **pi440fx_state, int *piix_devfn,
>                           ISABus **isa_bus, qemu_irq *pic,
>     diff --git a/include/hw/southbridge/piix.h
>     b/include/hw/southbridge/piix.h
>     index add352456b..79ebe0089b 100644
>     --- a/include/hw/southbridge/piix.h
>     +++ b/include/hw/southbridge/piix.h
>     @@ -18,6 +18,12 @@ I2CBus *piix4_pm_init(PCIBus *bus, int devfn,
>     uint32_t smb_io_base,
>                             qemu_irq sci_irq, qemu_irq smi_irq,
>                             int smm_enabled, DeviceState **piix4_pm);
>
>     +/*
>     + * Reset Control Register: PCI-accessible ISA-Compatible Register
>     at address
>     + * 0xcf9, provided by the PCI/ISA bridge (PIIX3 PCI function 0,
>     8086:7000).
>     + */
>     +#define RCR_IOPORT 0xcf9
>     +
>       extern PCIDevice *piix4_dev;
>
>       DeviceState *piix4_create(PCIBus *pci_bus, ISABus **isa_bus,
>     -- 
>     2.21.0
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