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x86: vSMP: Fix is_vsmp_box()

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is_vsmp_box() currently does not work on vSMPowered systems,  as pci cfg
space is not read correctly -- This patch fixes it.

Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ravikiran G Thirumalai 2008-03-20 00:39:02 -07:00 committed by Ingo Molnar
parent 864205062f
commit 3250c91ada
1 changed files with 4 additions and 2 deletions
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6
arch/x86/kernel/vsmp_64.c
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@ -84,8 +84,10 @@ int is_vsmp_box(void)
return vsmp;
/* Check if we are running on a ScaleMP vSMP box */
if (read_pci_config(0, 0x1f, 0, PCI_VENDOR_ID) ==
(PCI_VENDOR_ID_SCALEMP || (PCI_DEVICE_ID_SCALEMP_VSMP_CTL << 16)))
if ((read_pci_config_16(0, 0x1f, 0, PCI_VENDOR_ID) ==
PCI_VENDOR_ID_SCALEMP) &&
(read_pci_config_16(0, 0x1f, 0, PCI_DEVICE_ID) ==
PCI_DEVICE_ID_SCALEMP_VSMP_CTL))
vsmp = 1;
return vsmp;