On Wed, Nov 09, 2016 at 10:10:16AM -0500, Peter Xu wrote:
> Since pci-testdev is a very specific device for QEMU, let's use the new
> pci_scan_bars() helper, and selectively choose the bars we want.
>
> Reviewed-by: Andrew Jones <drjones@xxxxxxxxxx>
> Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
> ---
> lib/pci.h | 2 ++
> x86/vmexit.c | 17 ++++++-----------
> 2 files changed, 8 insertions(+), 11 deletions(-)
>
> diff --git a/lib/pci.h b/lib/pci.h
> index 5ed4e11..e452819 100644
> --- a/lib/pci.h
> +++ b/lib/pci.h
> @@ -68,6 +68,8 @@ int pci_testdev(void);
> * pci-testdev supports at least three types of tests (via mmio and
> * portio BARs): no-eventfd, wildcard-eventfd and datamatch-eventfd
> */
> +#define PCI_TESTDEV_BAR_MEM 0
> +#define PCI_TESTDEV_BAR_IO 1
> #define PCI_TESTDEV_NUM_BARS 2
> #define PCI_TESTDEV_NUM_TESTS 3
>
> diff --git a/x86/vmexit.c b/x86/vmexit.c
> index 63fa070..a22f43f 100644
> --- a/x86/vmexit.c
> +++ b/x86/vmexit.c
> @@ -389,17 +389,12 @@ int main(int ac, char **av)
> ret = pci_find_dev(PCI_VENDOR_ID_REDHAT, PCI_DEVICE_ID_REDHAT_TEST);
> if (ret != PCIDEVADDR_INVALID) {
> pci_dev_init(&pcidev, ret);
> - for (i = 0; i < PCI_TESTDEV_NUM_BARS; i++) {
> - if (!pci_bar_is_valid(&pcidev, i)) {
> - continue;
> - }
> - if (pci_bar_is_memory(&pcidev, i)) {
> - membar = pci_bar_get_addr(&pcidev, i);
> - pci_test.memaddr = ioremap(membar, PAGE_SIZE);
> - } else {
> - pci_test.iobar = pci_bar_get_addr(&pcidev, i);
> - }
> - }
> + pci_scan_bars(&pcidev);
> + assert(pci_bar_is_memory(&pcidev, PCI_TESTDEV_BAR_MEM));
> + assert(!pci_bar_is_memory(&pcidev, PCI_TESTDEV_BAR_IO));
> + membar = pcidev.bar[PCI_TESTDEV_BAR_MEM];
nit: I'd drop 'membar' and just pass pcidev.bar to ioremap
> + pci_test.memaddr = ioremap(membar, PAGE_SIZE);
> + pci_test.iobar = pcidev.bar[PCI_TESTDEV_BAR_IO];
> printf("pci-testdev at 0x%x membar %lx iobar %x\n",
> pcidev.bdf, membar, pci_test.iobar);
> }
> --
> 2.7.4
>
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