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Re: [Qemu-devel] [PATCH v5 for-2.3 23/28] hw/pxb: add map_irq func
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCH v5 for-2.3 23/28] hw/pxb: add map_irq func |
Date: |
Tue, 10 Mar 2015 17:43:48 +0100 |
On Tue, Mar 10, 2015 at 05:32:09PM +0200, Marcel Apfelbaum wrote:
> The bios does not index the pxb slot number when
> it computes the IRQ because it resides on bus 0
> and not on the current bus.
> However Qemu routes the irq through bus 0 and adds
> the pxb slot to the IRQ computation.
>
> Synchronize between bios and Qemu by canceling
> pxb's effect.
>
> Signed-off-by: Marcel Apfelbaum <address@hidden>
> ---
> hw/pci-bridge/pci_expander_bridge.c | 20 +++++++++++++++++++-
> 1 file changed, 19 insertions(+), 1 deletion(-)
>
> diff --git a/hw/pci-bridge/pci_expander_bridge.c
> b/hw/pci-bridge/pci_expander_bridge.c
> index 941f3c8..87515c1 100644
> --- a/hw/pci-bridge/pci_expander_bridge.c
> +++ b/hw/pci-bridge/pci_expander_bridge.c
> @@ -92,6 +92,24 @@ static const TypeInfo pxb_host_info = {
> .class_init = pxb_host_class_init,
> };
>
> +
> +static int pxb_map_irq_fn(PCIDevice *pci_dev, int pin)
> +{
> + PCIDevice *pxb = pci_dev->bus->parent_dev;
> +
> + /*
> + * The bios does not index the pxb slot number when
> + * it computes the IRQ because it resides on bus 0
> + * and not on the current bus.
> + * However QEMU routes the irq through bus 0 and adds
> + * the pxb slot to the IRQ computation.
I know it's QEMU but which function exactly?
> + *
> + * Synchronize between bios and QEMU by canceling
> + * pxb's effect.
> + */
> + return pin - PCI_SLOT(pxb->devfn);
> +}
> +
> static int pxb_dev_initfn(PCIDevice *dev)
> {
> PXBDev *pxb = PXB_DEV(dev);
> @@ -118,7 +136,7 @@ static int pxb_dev_initfn(PCIDevice *dev)
> bus->parent_dev = dev;
> bus->address_space_mem = dev->bus->address_space_mem;
> bus->address_space_io = dev->bus->address_space_io;
> - bus->map_irq = pci_swizzle_map_irq_fn;
> + bus->map_irq = pxb_map_irq_fn;
>
> bds = qdev_create(BUS(bus), "pci-bridge");
> bds->id = dev_name;
> --
> 2.1.0
- [Qemu-devel] [PATCH v5 for-2.3 27/28] apci: fix PXB behaviour if used with unsupported BIOS, (continued)
- [Qemu-devel] [PATCH v5 for-2.3 04/28] acpi: add aml_lless() term, Marcel Apfelbaum, 2015/03/10
- [Qemu-devel] [PATCH v5 for-2.3 02/28] acpi: add aml_or() term, Marcel Apfelbaum, 2015/03/10
- [Qemu-devel] [PATCH v5 for-2.3 06/28] acpi: add aml_shiftleft() term, Marcel Apfelbaum, 2015/03/10
- [Qemu-devel] [PATCH v5 for-2.3 23/28] hw/pxb: add map_irq func, Marcel Apfelbaum, 2015/03/10
- Re: [Qemu-devel] [PATCH v5 for-2.3 23/28] hw/pxb: add map_irq func,
Michael S. Tsirkin <=
[Qemu-devel] [PATCH v5 for-2.3 28/28] docs: Add PXB documentation, Marcel Apfelbaum, 2015/03/10
- Re: [Qemu-devel] [PATCH v5 for-2.3 28/28] docs: Add PXB documentation, Michael S. Tsirkin, 2015/03/10
- Re: [Qemu-devel] [PATCH v5 for-2.3 28/28] docs: Add PXB documentation, Marcel Apfelbaum, 2015/03/10
- Re: [Qemu-devel] [PATCH v5 for-2.3 28/28] docs: Add PXB documentation, Michael S. Tsirkin, 2015/03/10
- Re: [Qemu-devel] [PATCH v5 for-2.3 28/28] docs: Add PXB documentation, Marcel Apfelbaum, 2015/03/16
- Re: [Qemu-devel] [PATCH v5 for-2.3 28/28] docs: Add PXB documentation, Michael S. Tsirkin, 2015/03/16
- Re: [Qemu-devel] [PATCH v5 for-2.3 28/28] docs: Add PXB documentation, Marcel Apfelbaum, 2015/03/16
[Qemu-devel] [PATCH v5 for-2.3 25/28] hw/pxb: add numa_node parameter, Marcel Apfelbaum, 2015/03/10