From 83ea48507f64e847aeab33253f3057b55cb5b323 Mon Sep 17 00:00:00 2001 From: "kaf24@firebug.cl.cam.ac.uk" Date: Thu, 14 Jul 2005 14:01:21 +0000 Subject: [PATCH] Missing quirks.c file. --- .../arch/xen/i386/kernel/quirks.c | 49 +++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 linux-2.6-xen-sparse/arch/xen/i386/kernel/quirks.c diff --git a/linux-2.6-xen-sparse/arch/xen/i386/kernel/quirks.c b/linux-2.6-xen-sparse/arch/xen/i386/kernel/quirks.c new file mode 100644 index 0000000000..fcc6849b58 --- /dev/null +++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/quirks.c @@ -0,0 +1,49 @@ +/* + * This file contains work-arounds for x86 and x86_64 platform bugs. + */ +#include +#include +#include + +#if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_SMP) && defined(CONFIG_PCI) + +static void __devinit quirk_intel_irqbalance(struct pci_dev *dev) +{ + u8 config, rev; + u32 word; + + /* BIOS may enable hardware IRQ balancing for + * E7520/E7320/E7525(revision ID 0x9 and below) + * based platforms. + * Disable SW irqbalance/affinity on those platforms. + */ + pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev); + if (rev > 0x9) + return; + + printk(KERN_INFO "Intel E7520/7320/7525 detected."); + + /* enable access to config space*/ + pci_read_config_byte(dev, 0xf4, &config); + config |= 0x2; + pci_write_config_byte(dev, 0xf4, config); + + /* read xTPR register */ + raw_pci_ops->read(0, 0, 0x40, 0x4c, 2, &word); + + if (!(word & (1 << 13))) { + dom0_op_t op; + printk(KERN_INFO "Disabling irq balancing and affinity\n"); + op.cmd = DOM0_PLATFORM_QUIRK; + op.u.platform_quirk.quirk_id = QUIRK_NOIRQBALANCING; + (void)HYPERVISOR_dom0_op(&op); + } + + config &= ~0x2; + /* disable access to config space*/ + pci_write_config_byte(dev, 0xf4, config); +} +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH, quirk_intel_irqbalance); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, quirk_intel_irqbalance); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH, quirk_intel_irqbalance); +#endif -- 2.30.2