Re: [Xen-devel] [PATCH 27/32] hw/pci-host/piix: Define and use the PIIX IRQ Route Control Registers

[Aleksandar Markovic <aleksandar.m.mail@xxxxxxxxx>]

On Tuesday, October 15, 2019, Philippe Mathieu-Daudé <philmd@xxxxxxxxxx> wrote:
> The IRQ Route Control registers definitions belong to the PIIX
> chipset. We were only defining the 'A' register. Define the other
> B, C and D registers, and use them.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
> ---
>  hw/i386/xen/xen-hvm.c         | 5 +++--
>  hw/mips/gt64xxx_pci.c         | 4 ++--
>  hw/pci-host/piix.c            | 9 ++++-----
>  include/hw/southbridge/piix.h | 6 ++++++
>  4 files changed, 15 insertions(+), 9 deletions(-)

The register from the patch 27/32 doesn't have prefix and the registers ftom this patch do - inconsistency?

In any case:

Reviewed-by: Aleksandar Markovic <amarkovic@xxxxxxxxxxxx>

 

> diff --git a/hw/i386/xen/xen-hvm.c b/hw/i386/xen/xen-hvm.c
> index 6b5e5bb7f5..4ce2fb9c89 100644
> --- a/hw/i386/xen/xen-hvm.c
> +++ b/hw/i386/xen/xen-hvm.c
> @@ -14,6 +14,7 @@
>  #include "hw/pci/pci.h"
>  #include "hw/pci/pci_host.h"
>  #include "hw/i386/pc.h"
> +#include "hw/southbridge/piix.h"
>  #include "hw/irq.h"
>  #include "hw/hw.h"
>  #include "hw/i386/apic-msidef.h"
> @@ -156,8 +157,8 @@ void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len)
>              v = 0;
>          }
>          v &= 0xf;
> -        if (((address + i) >= 0x60) && ((address + i) <= 0x63)) {
> -            xen_set_pci_link_route(xen_domid, address + i - 0x60, v);
> +        if (((address + i) >= PIIX_PIRQCA) && ((address + i) <= PIIX_PIRQCD)) {
> +            xen_set_pci_link_route(xen_domid, address + i - PIIX_PIRQCA, v);
>          }
>      }
>  }
> diff --git a/hw/mips/gt64xxx_pci.c b/hw/mips/gt64xxx_pci.c
> index c277398c0d..5cab9c1ee1 100644
> --- a/hw/mips/gt64xxx_pci.c
> +++ b/hw/mips/gt64xxx_pci.c
> @@ -1013,12 +1013,12 @@ static void gt64120_pci_set_irq(void *opaque, int irq_num, int level)
>
>      /* now we change the pic irq level according to the piix irq mappings */
>      /* XXX: optimize */
> -    pic_irq = piix4_dev->config[0x60 + irq_num];
> +    pic_irq = piix4_dev->config[PIIX_PIRQCA + irq_num];
>      if (pic_irq < 16) {
>          /* The pic level is the logical OR of all the PCI irqs mapped to it. */
>          pic_level = 0;
>          for (i = 0; i < 4; i++) {
> -            if (pic_irq == piix4_dev->config[0x60 + i]) {
> +            if (pic_irq == piix4_dev->config[PIIX_PIRQCA + i]) {
>                  pic_level |= pci_irq_levels[i];
>              }
>          }
> diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c
> index 3770575c1a..a450fc726e 100644
> --- a/hw/pci-host/piix.c
> +++ b/hw/pci-host/piix.c
> @@ -61,7 +61,6 @@ typedef struct I440FXState {
>  #define PIIX_NUM_PIC_IRQS       16      /* i8259 * 2 */
>  #define PIIX_NUM_PIRQS          4ULL    /* PIRQ[A-D] */
>  #define XEN_PIIX_NUM_PIRQS      128ULL
> -#define PIIX_PIRQC              0x60
>
>  typedef struct PIIX3State {
>      PCIDevice dev;
> @@ -468,7 +467,7 @@ static void piix3_set_irq_level_internal(PIIX3State *piix3, int pirq, int level)
>      int pic_irq;
>      uint64_t mask;
>
> -    pic_irq = piix3->dev.config[PIIX_PIRQC + pirq];
> +    pic_irq = piix3->dev.config[PIIX_PIRQCA + pirq];
>      if (pic_irq >= PIIX_NUM_PIC_IRQS) {
>          return;
>      }
> @@ -482,7 +481,7 @@ static void piix3_set_irq_level(PIIX3State *piix3, int pirq, int level)
>  {
>      int pic_irq;
>
> -    pic_irq = piix3->dev.config[PIIX_PIRQC + pirq];
> +    pic_irq = piix3->dev.config[PIIX_PIRQCA + pirq];
>      if (pic_irq >= PIIX_NUM_PIC_IRQS) {
>          return;
>      }
> @@ -501,7 +500,7 @@ static void piix3_set_irq(void *opaque, int pirq, int level)
>  static PCIINTxRoute piix3_route_intx_pin_to_irq(void *opaque, int pin)
>  {
>      PIIX3State *piix3 = opaque;
> -    int irq = piix3->dev.config[PIIX_PIRQC + pin];
> +    int irq = piix3->dev.config[PIIX_PIRQCA + pin];
>      PCIINTxRoute route;
>
>      if (irq < PIIX_NUM_PIC_IRQS) {
> @@ -530,7 +529,7 @@ static void piix3_write_config(PCIDevice *dev,
>                                 uint32_t address, uint32_t val, int len)
>  {
>      pci_default_write_config(dev, address, val, len);
> -    if (ranges_overlap(address, len, PIIX_PIRQC, 4)) {
> +    if (ranges_overlap(address, len, PIIX_PIRQCA, 4)) {
>          PIIX3State *piix3 = PIIX3_PCI_DEVICE(dev);
>          int pic_irq;
>
> diff --git a/include/hw/southbridge/piix.h b/include/hw/southbridge/piix.h
> index 79ebe0089b..9c92c37a4d 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);
>
> +/* PIRQRC[A:D]: PIRQx Route Control Registers */
> +#define PIIX_PIRQCA 0x60
> +#define PIIX_PIRQCB 0x61
> +#define PIIX_PIRQCC 0x62
> +#define PIIX_PIRQCD 0x63
> +
>  /*
>   * Reset Control Register: PCI-accessible ISA-Compatible Register at address
>   * 0xcf9, provided by the PCI/ISA bridge (PIIX3 PCI function 0, 8086:7000).
> -- 
> 2.21.0
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