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Re: [Qemu-devel] [Xen-devel] [PATCH V5 06/10] pci.c: Add pci_check_bar_o
From: |
Konrad Rzeszutek Wilk |
Subject: |
Re: [Qemu-devel] [Xen-devel] [PATCH V5 06/10] pci.c: Add pci_check_bar_overlap |
Date: |
Tue, 29 Nov 2011 16:53:20 -0400 |
User-agent: |
Mutt/1.5.9i |
On Thu, Nov 24, 2011 at 05:44:35PM +0000, Anthony PERARD wrote:
> From: Yuji Shimada <address@hidden>
>
> This function help Xen PCI Passthrough device to check for overlap.
helps
>
> Signed-off-by: Yuji Shimada <address@hidden>
> Signed-off-by: Anthony PERARD <address@hidden>
> ---
> hw/pci.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
> hw/pci.h | 3 +++
> 2 files changed, 50 insertions(+), 0 deletions(-)
>
> diff --git a/hw/pci.c b/hw/pci.c
> index 399227f..563bb37 100644
> --- a/hw/pci.c
> +++ b/hw/pci.c
> @@ -2038,3 +2038,50 @@ MemoryRegion *pci_address_space_io(PCIDevice *dev)
> {
> return dev->bus->address_space_io;
> }
> +
> +int pci_check_bar_overlap(PCIDevice *dev,
> + pcibus_t addr, pcibus_t size, uint8_t type)
> +{
> + PCIBus *bus = dev->bus;
> + PCIDevice *devices = NULL;
> + PCIIORegion *r;
> + int i, j;
> + int rc = 0;
> +
> + /* check Overlapped to Base Address */
> + for (i = 0; i < ARRAY_SIZE(bus->devices); i++) {
> + devices = bus->devices[i];
> + if (!devices) {
> + continue;
> + }
> +
> + /* skip itself */
> + if (devices->devfn == dev->devfn) {
> + continue;
> + }
> +
> + for (j = 0; j < PCI_NUM_REGIONS; j++) {
> + r = &devices->io_regions[j];
> +
> + /* skip different resource type, but don't skip when
> + * prefetch and non-prefetch memory are compared.
> + */
> + if (type != r->type) {
> + if (type == PCI_BASE_ADDRESS_SPACE_IO ||
> + r->type == PCI_BASE_ADDRESS_SPACE_IO) {
> + continue;
> + }
> + }
> +
> + if ((addr < (r->addr + r->size)) && ((addr + size) > r->addr)) {
> + printf("Overlapped to device[%02x:%02x.%x][Region:%d]"
> + "[Address:%"PRIx64"h][Size:%"PRIx64"h]\n",
> + pci_bus_num(bus), PCI_SLOT(devices->devfn),
> + PCI_FUNC(devices->devfn), j, r->addr, r->size);
> + rc = 1;
> + }
> + }
> + }
> +
> + return rc;
> +}
> diff --git a/hw/pci.h b/hw/pci.h
> index 625e717..9a723d2 100644
> --- a/hw/pci.h
> +++ b/hw/pci.h
> @@ -552,4 +552,7 @@ static inline void pci_dma_sglist_init(QEMUSGList *qsg,
> PCIDevice *dev,
> qemu_sglist_init(qsg, alloc_hint);
> }
>
> +int pci_check_bar_overlap(PCIDevice *dev,
> + pcibus_t addr, pcibus_t size, uint8_t type);
> +
> #endif
> --
> Anthony PERARD
>
>
> _______________________________________________
> Xen-devel mailing list
> address@hidden
> http://lists.xensource.com/xen-devel
- [Qemu-devel] [PATCH V5 00/10] Xen PCI Passthrough, Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 01/10] pci_ids: Add INTEL_82599_VF id., Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 03/10] pci_regs: Add PCI_EXP_TYPE_PCIE_BRIDGE, Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 02/10] pci_regs: Fix value of PCI_EXP_TYPE_RC_EC., Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 04/10] configure: Introduce --enable-xen-pci-passthrough., Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 05/10] Introduce HostPCIDevice to access a pci device on the host., Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 06/10] pci.c: Add pci_check_bar_overlap, Anthony PERARD, 2011/11/24
- Re: [Qemu-devel] [Xen-devel] [PATCH V5 06/10] pci.c: Add pci_check_bar_overlap,
Konrad Rzeszutek Wilk <=
- [Qemu-devel] [PATCH V5 09/10] Introduce apic-msidef.h, Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 07/10] Introduce Xen PCI Passthrough, qdevice (1/3), Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 08/10] Introduce Xen PCI Passthrough, PCI config space helpers (2/3), Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 10/10] Introduce Xen PCI Passthrough, MSI (3/3), Anthony PERARD, 2011/11/24