From: Eric Auger <eric.auger@redhat.com>
To: Peter Xu <peterx@redhat.com>, qemu-devel@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
"Daniel P . Berrange" <berrange@redhat.com>,
Eduardo Habkost <ehabkost@redhat.com>,
"Michael S . Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>,
David Hildenbrand <david@redhat.com>,
Markus Armbruster <armbru@redhat.com>,
Shannon Zhao <shannon.zhaosl@gmail.com>,
Alex Williamson <alex.williamson@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Igor Mammedov <imammedo@redhat.com>,
David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [PATCH 5/8] pci: Add pci_for_each_root_bus()
Date: Thu, 21 Oct 2021 14:22:46 +0200 [thread overview]
Message-ID: <92b98c65-5acb-acc2-6968-c9066c54b0b6@redhat.com> (raw)
In-Reply-To: <20211021104259.57754-6-peterx@redhat.com>
Hi Peter,
On 10/21/21 12:42 PM, Peter Xu wrote:
> Add a helper to loop over each root bus of the system, either the default root
> bus or extended buses like pxb-pcie.
>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
> hw/pci/pci.c | 26 ++++++++++++++++++++++++++
> include/hw/pci/pci.h | 2 ++
> 2 files changed, 28 insertions(+)
>
> diff --git a/hw/pci/pci.c b/hw/pci/pci.c
> index 4a84e478ce..1623bc9099 100644
> --- a/hw/pci/pci.c
> +++ b/hw/pci/pci.c
> @@ -2097,6 +2097,32 @@ void pci_for_each_bus_depth_first(PCIBus *bus, pci_bus_ret_fn begin,
> }
> }
>
> +typedef struct {
> + pci_bus_fn fn;
> + void *opaque;
> +} pci_root_bus_args;
> +
> +static int pci_find_root_bus(Object *obj, void *opaque)
> +{
> + pci_root_bus_args *args = opaque;
> +
> + if (object_dynamic_cast(obj, TYPE_PCI_HOST_BRIDGE)) {
> + PCIBus *bus = PCI_HOST_BRIDGE(obj)->bus;
> +
> + if (bus) {
> + args->fn(bus, args->opaque);
> + }
> + }
> +
> + return 0;
> +}
> +
> +void pci_for_each_root_bus(pci_bus_fn fn, void *opaque)
> +{
> + pci_root_bus_args args = { .fn = fn, .opaque = opaque };
> +
> + object_child_foreach_recursive(object_get_root(), pci_find_root_bus, &args);
> +}
>
> PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn)
> {
> diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
> index a7e81f04d3..9e490d8969 100644
> --- a/include/hw/pci/pci.h
> +++ b/include/hw/pci/pci.h
> @@ -474,6 +474,8 @@ void pci_for_each_device_under_bus_reverse(PCIBus *bus,
> void *opaque);
> void pci_for_each_bus_depth_first(PCIBus *bus, pci_bus_ret_fn begin,
> pci_bus_fn end, void *parent_state);
> +/* Call `fn' for each pci root bus on the system */
nit: @fn ?
> +void pci_for_each_root_bus(pci_bus_fn fn, void *opaque);
> PCIDevice *pci_get_function_0(PCIDevice *pci_dev);
>
> /* Use this wrapper when specific scan order is not required. */
with the pci_root_bus_args struct type renamed as David suggested
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Eric
next prev parent reply other threads:[~2021-10-21 12:24 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-21 10:42 [PATCH 0/8] pci/iommu: Fail early if vfio-pci detected before vIOMMU Peter Xu
2021-10-21 10:42 ` [PATCH 1/8] pci: Define pci_bus_dev_fn type Peter Xu
2021-10-21 10:53 ` David Hildenbrand
2021-10-21 11:15 ` Eric Auger
2021-10-22 2:16 ` Peter Xu
2021-10-21 11:36 ` Philippe Mathieu-Daudé
2021-10-21 10:42 ` [PATCH 2/8] pci: Export pci_for_each_device_under_bus*() Peter Xu
2021-10-21 10:54 ` David Hildenbrand
2021-10-21 11:32 ` Eric Auger
2021-10-21 11:39 ` Philippe Mathieu-Daudé
2021-10-21 10:42 ` [PATCH 3/8] pci: Use pci_for_each_device_under_bus*() Peter Xu
2021-10-21 10:56 ` David Hildenbrand
2021-10-21 11:34 ` Eric Auger
2021-10-22 2:19 ` Peter Xu
2021-10-21 10:42 ` [PATCH 4/8] pci: Define pci_bus_fn/pci_bus_ret_fn type Peter Xu
2021-10-21 10:57 ` David Hildenbrand
2021-10-21 11:37 ` Eric Auger
2021-10-21 11:44 ` Philippe Mathieu-Daudé
2021-10-21 12:54 ` Philippe Mathieu-Daudé
2021-10-22 2:24 ` Peter Xu
2021-10-21 10:42 ` [PATCH 5/8] pci: Add pci_for_each_root_bus() Peter Xu
2021-10-21 11:00 ` David Hildenbrand
2021-10-21 12:22 ` Eric Auger [this message]
2021-10-25 13:16 ` Michael S. Tsirkin
2021-10-28 2:56 ` Peter Xu
2021-10-21 10:42 ` [PATCH 6/8] pci: Use pci_for_each_root_bus() in current code Peter Xu
2021-10-21 11:06 ` David Hildenbrand
2021-10-21 12:28 ` Eric Auger
2021-10-21 10:42 ` [PATCH 7/8] pci: Add pci_for_each_device_all() Peter Xu
2021-10-21 10:54 ` Michael S. Tsirkin
2021-10-22 2:33 ` Peter Xu
2021-10-22 8:43 ` Michael S. Tsirkin
2021-10-25 12:57 ` Peter Xu
2021-10-25 13:13 ` Michael S. Tsirkin
2021-10-21 10:42 ` [PATCH 8/8] x86-iommu: Fail early if vIOMMU specified after vfio-pci Peter Xu
2021-10-21 10:49 ` Michael S. Tsirkin
2021-10-21 12:38 ` Eric Auger
2021-10-22 2:37 ` Peter Xu
2021-10-21 22:30 ` Alex Williamson
2021-10-22 2:14 ` Peter Xu
2021-10-26 15:11 ` Igor Mammedov
2021-10-26 15:38 ` Alex Williamson
2021-10-27 8:30 ` Peter Xu
2021-10-28 2:30 ` Peter Xu
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