Pull video into test branch

[linux-drm-fsl-dcu.git] / arch / i386 / kernel / quirks.c

diff --git a/arch/i386/kernel/quirks.c b/arch/i386/kernel/quirks.c
index 9f6ab1789bb05fc81593c47211b16bc45be894e1..34874c398b445735cf94b8bf0ac505798607eae7 100644 (file)
--- a/arch/i386/kernel/quirks.c
+++ b/arch/i386/kernel/quirks.c
@@ -3,10 +3,12 @@
  */
 #include <linux/pci.h>
 #include <linux/irq.h>
+#include <asm/pci-direct.h>
+#include <asm/genapic.h>
+#include <asm/cpu.h>
 
 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_SMP) && defined(CONFIG_PCI)
-
-static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
+static void __devinit verify_quirk_intel_irqbalance(struct pci_dev *dev)
 {
        u8 config, rev;
        u32 word;
@@ -14,14 +16,12 @@ static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
        /* BIOS may enable hardware IRQ balancing for
         * E7520/E7320/E7525(revision ID 0x9 and below)
         * based platforms.
-        * Disable SW irqbalance/affinity on those platforms.
+        * For those platforms, make sure that the genapic is set to 'flat'
         */
        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);
        pci_write_config_byte(dev, 0xf4, config|0x2);
@@ -29,6 +29,44 @@ static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
        /* read xTPR register */
        raw_pci_ops->read(0, 0, 0x40, 0x4c, 2, &word);
 
+       if (!(word & (1 << 13))) {
+#ifdef CONFIG_X86_64
+               if (genapic !=  &apic_flat)
+                       panic("APIC mode must be flat on this system\n");
+#elif defined(CONFIG_X86_GENERICARCH)
+               if (genapic != &apic_default)
+                       panic("APIC mode must be default(flat) on this system. Use apic=default\n");
+#endif
+       }
+
+       /* put back the original value for config space*/
+       if (!(config & 0x2))
+               pci_write_config_byte(dev, 0xf4, config);
+}
+
+void __init quirk_intel_irqbalance(void)
+{
+       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.
+        */
+       rev = read_pci_config_byte(0, 0, 0, PCI_CLASS_REVISION);
+       if (rev > 0x9)
+               return;
+
+       printk(KERN_INFO "Intel E7520/7320/7525 detected.");
+
+       /* enable access to config space */
+       config = read_pci_config_byte(0, 0, 0, 0xf4);
+       write_pci_config_byte(0, 0, 0, 0xf4, config|0x2);
+
+       /* read xTPR register */
+       word = read_pci_config_16(0, 0, 0x40, 0x4c);
+
        if (!(word & (1 << 13))) {
                printk(KERN_INFO "Disabling irq balancing and affinity\n");
 #ifdef CONFIG_IRQBALANCE
@@ -37,14 +75,25 @@ static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
                noirqdebug_setup("");
 #ifdef CONFIG_PROC_FS
                no_irq_affinity = 1;
+#endif
+#ifdef CONFIG_HOTPLUG_CPU
+               printk(KERN_INFO "Disabling cpu hotplug control\n");
+               enable_cpu_hotplug = 0;
+#endif
+#ifdef CONFIG_X86_64
+               /* force the genapic selection to flat mode so that
+                * interrupts can be redirected to more than one CPU.
+                */
+               genapic_force = &apic_flat;
 #endif
        }
 
-       /* put back the original value for config space*/
+       /* put back the original value for config space */
        if (!(config & 0x2))
-               pci_write_config_byte(dev, 0xf4, config);
+               write_pci_config_byte(0, 0, 0, 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);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_E7320_MCH,  verify_quirk_intel_irqbalance);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_E7525_MCH,  verify_quirk_intel_irqbalance);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_E7520_MCH,  verify_quirk_intel_irqbalance);
+
 #endif