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authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2011-07-22 12:18:43 -0400
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2011-08-26 12:09:34 -0400
commit917e3e65c35459d52f0d0b890aa5df0cad07a051 (patch)
treedaa816a517b5c8666826e291cc385f7d7f5245b7 /drivers/pci
parent02f8c6aee8df3cdc935e9bdd4f2d020306035dbe (diff)
xen-pcifront: Update warning comment to use 'e820_host' option.
With Xen changeset 23428 "libxl: Add 'e820_host' option to config file" the E820 as seen from the host can now be passed into the guest. This means that a PV guest can now: - Use the correct PCI I/O gap. Before these patches, Linux guest would boot up and would tell: [ 0.000000] Allocating PCI resources starting at 40000000 (gap: 40000000:c0000000) while in actuality the PCI I/O gap should have been: [ 0.000000] Allocating PCI resources starting at b0000000 (gap: b0000000:4c000000) - The PV domain with PCI devices was limited to 3GB. It now can be booted with 4GB, 8GB, or whatever number you want. The PCI devices will now _not_ conflict with System RAM. Meaning the drivers can load. CC: Jesse Barnes <jbarnes@virtuousgeek.org> CC: linux-pci@vger.kernel.org CC: stable@kernel.org [v2: Made the string less broken up. Suggested by Joe Perches] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/xen-pcifront.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index 492b7d807fe8..d4e7a1052259 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -400,9 +400,8 @@ static int pcifront_claim_resource(struct pci_dev *dev, void *data)
dev_info(&pdev->xdev->dev, "claiming resource %s/%d\n",
pci_name(dev), i);
if (pci_claim_resource(dev, i)) {
- dev_err(&pdev->xdev->dev, "Could not claim "
- "resource %s/%d! Device offline. Try "
- "giving less than 4GB to domain.\n",
+ dev_err(&pdev->xdev->dev, "Could not claim resource %s/%d! "
+ "Device offline. Try using e820_host=1 in the guest config.\n",
pci_name(dev), i);
}
}