From 3250c91ada16a06de5afef55bce7b766c894d75c Mon Sep 17 00:00:00 2001 From: Ravikiran G Thirumalai Date: Thu, 20 Mar 2008 00:39:02 -0700 Subject: [PATCH] x86: vSMP: Fix is_vsmp_box() 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 Signed-off-by: Ingo Molnar --- arch/x86/kernel/vsmp_64.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/vsmp_64.c b/arch/x86/kernel/vsmp_64.c index a00961d42e75..eb25584c54c3 100644 --- a/arch/x86/kernel/vsmp_64.c +++ b/arch/x86/kernel/vsmp_64.c @@ -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;