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| author |   Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-07-22 12:18:43 -0400 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-08-26 12:09:34 -0400 |
| commit | 917e3e65c35459d52f0d0b890aa5df0cad07a051 (patch) | |
| tree | daa816a517b5c8666826e291cc385f7d7f5245b7 /drivers/pci/xen-pcifront.c | |
| parent | Linux 3.0 (diff) | |
| download | linux-dev-917e3e65c35459d52f0d0b890aa5df0cad07a051.tar.xz linux-dev-917e3e65c35459d52f0d0b890aa5df0cad07a051.zip | |
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/xen-pcifront.c')
| -rw-r--r-- | drivers/pci/xen-pcifront.c | 5 |
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); } } |