>>> On 04.05.12 at 15:29, David Vrabel <david.vrabel@xxxxxxxxxx> wrote:
> From: David Vrabel <david.vrabel@xxxxxxxxxx>
>
> The accessing PCI configuration space with the PCI BIOS32 service does
> not work in PV guests.
>
> On systems without MMCONFIG or where the BIOS hasn't marked the
> MMCONFIG region as reserved in the e820 map, the BIOS service is
> probed (even though direct access is preferred) and this hangs.
>
> Signed-off-by: David Vrabel <david.vrabel@xxxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
> ---
> Changes in v2:
> - improve commit message
>
> ---
> arch/x86/xen/enlighten.c | 5 ++++-
> 1 files changed, 4 insertions(+), 1 deletions(-)
>
> diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
> index a8f8844..7ce2c78 100644
> --- a/arch/x86/xen/enlighten.c
> +++ b/arch/x86/xen/enlighten.c
> @@ -63,6 +63,7 @@
> #include <asm/stackprotector.h>
> #include <asm/hypervisor.h>
> #include <asm/mwait.h>
> +#include <asm/pci_x86.h>
>
> #ifdef CONFIG_ACPI
> #include <linux/acpi.h>
> @@ -1365,7 +1366,9 @@ asmlinkage void __init xen_start_kernel(void)
> /* Make sure ACS will be enabled */
> pci_request_acs();
> }
> -
> +
> + /* PCI BIOS service won't work from a PV guest. */
> + pci_probe &= ~PCI_PROBE_BIOS;
>
> xen_raw_console_write("about to get started...\n");
>
> --
> 1.7.2.5
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxx
> http://lists.xen.org/xen-devel
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