diff options
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 | |
parent | 02f8c6aee8df3cdc935e9bdd4f2d020306035dbe (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.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) | |||
400 | dev_info(&pdev->xdev->dev, "claiming resource %s/%d\n", | 400 | dev_info(&pdev->xdev->dev, "claiming resource %s/%d\n", |
401 | pci_name(dev), i); | 401 | pci_name(dev), i); |
402 | if (pci_claim_resource(dev, i)) { | 402 | if (pci_claim_resource(dev, i)) { |
403 | dev_err(&pdev->xdev->dev, "Could not claim " | 403 | dev_err(&pdev->xdev->dev, "Could not claim resource %s/%d! " |
404 | "resource %s/%d! Device offline. Try " | 404 | "Device offline. Try using e820_host=1 in the guest config.\n", |
405 | "giving less than 4GB to domain.\n", | ||
406 | pci_name(dev), i); | 405 | pci_name(dev), i); |
407 | } | 406 | } |
408 | } | 407 | } |