| From 917e3e65c35459d52f0d0b890aa5df0cad07a051 Mon Sep 17 00:00:00 2001 |
| From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
| Date: Fri, 22 Jul 2011 12:18:43 -0400 |
| Subject: xen-pcifront: Update warning comment to use 'e820_host' option. |
| |
| From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
| |
| commit 917e3e65c35459d52f0d0b890aa5df0cad07a051 upstream. |
| |
| 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 |
| [v2: Made the string less broken up. Suggested by Joe Perches] |
| Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> |
| |
| --- |
| drivers/pci/xen-pcifront.c | 5 ++--- |
| 1 file changed, 2 insertions(+), 3 deletions(-) |
| |
| --- a/drivers/pci/xen-pcifront.c |
| +++ b/drivers/pci/xen-pcifront.c |
| @@ -400,9 +400,8 @@ static int pcifront_claim_resource(struc |
| 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); |
| } |
| } |
