From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Xu Subject: [kvm-unit-tests PATCH 09/14] pci: provide pci_set_master() Date: Fri, 14 Oct 2016 20:40:47 +0800 Message-ID: <1476448852-30062-10-git-send-email-peterx@redhat.com> References: <1476448852-30062-1-git-send-email-peterx@redhat.com> Cc: jan.kiszka@web.de, agordeev@redhat.com, drjones@redhat.com, rkrcmar@redhat.com, pbonzini@redhat.com, peterx@redhat.com To: kvm@vger.kernel.org Return-path: Received: from mx1.redhat.com ([209.132.183.28]:41798 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753451AbcJNMlY (ORCPT ); Fri, 14 Oct 2016 08:41:24 -0400 In-Reply-To: <1476448852-30062-1-git-send-email-peterx@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: And set master by default for pci devices. So that DMA is allowed. Signed-off-by: Peter Xu --- lib/pci.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/lib/pci.c b/lib/pci.c index ef0b02a..044e4db 100644 --- a/lib/pci.c +++ b/lib/pci.c @@ -7,6 +7,13 @@ #include "pci.h" #include "asm/pci.h" +static void pci_set_master(pci_dev *dev, int master) +{ + uint32_t val = pci_config_read(dev->pci_addr, PCI_COMMAND); + val |= PCI_COMMAND_MASTER; + pci_config_write(dev->pci_addr, PCI_COMMAND, val); +} + /* * Scan bus look for a specific device. Only bus 0 scanned for now. * After the scan, a pci_dev is returned with correct BAR information. @@ -41,6 +48,8 @@ int pci_dev_init(pci_dev *dev, uint16_t vendor_id, uint16_t device_id) } dev->inited = true; + pci_set_master(dev, 1); + return 0; } -- 2.7.4