From: Keir Fraser <keir.fraser@citrix.com>
Date: Thu, 11 Dec 2008 13:26:02 +0000 (+0000)
Subject: hvmloader: enable bus mastering of PCI device
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14026^2~30
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https://%22%22/%22http:/www.example.com/cgi/%22https:/%22%22?a=commitdiff_plain;h=20553adcd9157010e708488b8b74af8cc135096a;p=xen.git

hvmloader: enable bus mastering of PCI device

Without this, init routine in some PCI option ROM doesn't work well.

Signed-off-by: Kouya Shimura <kouya@jp.fujitsu.com>
---

diff --git a/tools/firmware/hvmloader/hvmloader.c b/tools/firmware/hvmloader/hvmloader.c
index bff548f9f2..9723306f8e 100644
--- a/tools/firmware/hvmloader/hvmloader.c
+++ b/tools/firmware/hvmloader/hvmloader.c
@@ -269,6 +269,11 @@ static void pci_setup(void)
             printf("pci dev %02x:%x INT%c->IRQ%u\n",
                    devfn>>3, devfn&7, 'A'+pin-1, isa_irq);
         }
+
+        /* Enable bus mastering. */
+        cmd = pci_readw(devfn, PCI_COMMAND);
+        cmd |= PCI_COMMAND_MASTER;
+        pci_writew(devfn, PCI_COMMAND, cmd);
     }
 
     /* Assign iomem and ioport resources in descending order of size. */