From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/i386/kernel/quirks.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 arch/i386/kernel/quirks.c (limited to 'arch/i386/kernel/quirks.c') diff --git a/arch/i386/kernel/quirks.c b/arch/i386/kernel/quirks.c new file mode 100644 index 00000000000..aaf89cb2bc5 --- /dev/null +++ b/arch/i386/kernel/quirks.c @@ -0,0 +1,52 @@ +/* + * 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))) { + printk(KERN_INFO "Disabling irq balancing and affinity\n"); +#ifdef CONFIG_IRQBALANCE + irqbalance_disable(""); +#endif + noirqdebug_setup(""); +#ifdef CONFIG_PROC_FS + no_irq_affinity = 1; +#endif + } + + 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 -- cgit v1.2.3