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[PATCH] x86: fix the irqbalance quirk for E7320/E7520/E7525

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Move the irqbalance quirks for E7320/E7520/E7525(Errata 23 in
http://download.intel.com/design/chipsets/specupdt/30304203.pdf) to early
quirks.

And add a PCI quirk for these platforms to check(which happens very late
during the boot) if the APIC routing is indeed set to default flat mode.

This fixes the breakage(in x86_64) of this quirk due to cpu hotplug which
selects physical mode instead of the logical flat(as needed for this errata
workaround).

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@suse.de>
Cc: "Li, Shaohua" <shaohua.li@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
This commit is contained in:
Siddha, Suresh B 2006-12-07 02:14:10 +01:00 committed by Andi Kleen
parent 9899f826fc
commit b0d0a4ba45
8 changed files with 88 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
arch/i386/kernel/acpi/earlyquirk.c
View File

@ -10,6 +10,7 @@
#include <asm/pci-direct.h>
#include <asm/acpi.h>
#include <asm/apic.h>
#include <asm/irq.h>
#ifdef CONFIG_ACPI
@ -49,6 +50,24 @@ static int __init check_bridge(int vendor, int device)
return 0;
}
static void check_intel(void)
{
u16 vendor, device;
vendor = read_pci_config_16(0, 0, 0, PCI_VENDOR_ID);
if (vendor != PCI_VENDOR_ID_INTEL)
return;
device = read_pci_config_16(0, 0, 0, PCI_DEVICE_ID);
#ifdef CONFIG_SMP
if (device == PCI_DEVICE_ID_INTEL_E7320_MCH ||
device == PCI_DEVICE_ID_INTEL_E7520_MCH ||
device == PCI_DEVICE_ID_INTEL_E7525_MCH)
quirk_intel_irqbalance();
#endif
}
void __init check_acpi_pci(void)
{
int num, slot, func;
@ -60,6 +79,8 @@ void __init check_acpi_pci(void)
if (!early_pci_allowed())
return;
check_intel();
/* Poor man's PCI discovery */
for (num = 0; num < 32; num++) {
for (slot = 0; slot < 32; slot++) {

42
arch/i386/kernel/quirks.c
View File

@ -3,10 +3,23 @@
*/
#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 verify_quirk_intel_irqbalance(struct pci_dev *dev)
{
#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
}
static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
void __init quirk_intel_irqbalance(void)
{
u8 config, rev;
u32 word;
@ -16,18 +29,18 @@ static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
* based platforms.
* Disable SW irqbalance/affinity on those platforms.
*/
pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev);
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 */
pci_read_config_byte(dev, 0xf4, &config);
pci_write_config_byte(dev, 0xf4, config|0x2);
config = read_pci_config_byte(0, 0, 0, 0xf4);
write_pci_config_byte(0, 0, 0, 0xf4, config|0x2);
/* read xTPR register */
raw_pci_ops->read(0, 0, 0x40, 0x4c, 2, &word);
word = read_pci_config_16(0, 0, 0x40, 0x4c);
if (!(word & (1 << 13))) {
printk(KERN_INFO "Disabling irq balancing and affinity\n");
@ -37,14 +50,25 @@ 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 */
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

7
arch/i386/kernel/smpboot.c
View File

@ -58,6 +58,7 @@
#include <asm/arch_hooks.h>
#include <asm/nmi.h>
#include <asm/pda.h>
#include <asm/genapic.h>
#include <mach_apic.h>
#include <mach_wakecpu.h>
@ -1482,6 +1483,12 @@ int __devinit __cpu_up(unsigned int cpu)
cpu_set(cpu, smp_commenced_mask);
while (!cpu_isset(cpu, cpu_online_map))
cpu_relax();
#ifdef CONFIG_X86_GENERICARCH
if (num_online_cpus() > 8 && genapic == &apic_default)
panic("Default flat APIC routing can't be used with > 8 cpus\n");
#endif
return 0;
}

13
arch/x86_64/kernel/early-quirks.c
View File

@ -71,6 +71,18 @@ static void ati_bugs(void)
{
}
static void intel_bugs(void)
{
u16 device = read_pci_config_16(0, 0, 0, PCI_DEVICE_ID);
#ifdef CONFIG_SMP
if (device == PCI_DEVICE_ID_INTEL_E7320_MCH ||
device == PCI_DEVICE_ID_INTEL_E7520_MCH ||
device == PCI_DEVICE_ID_INTEL_E7525_MCH)
quirk_intel_irqbalance();
#endif
}
struct chipset {
u16 vendor;
void (*f)(void);
@ -80,6 +92,7 @@ static struct chipset early_qrk[] = {
{ PCI_VENDOR_ID_NVIDIA, nvidia_bugs },
{ PCI_VENDOR_ID_VIA, via_bugs },
{ PCI_VENDOR_ID_ATI, ati_bugs },
{ PCI_VENDOR_ID_INTEL, intel_bugs},
{}
};

8
arch/x86_64/kernel/smpboot.c
View File

@ -60,6 +60,7 @@
#include <asm/irq.h>
#include <asm/hw_irq.h>
#include <asm/numa.h>
#include <asm/genapic.h>
/* Number of siblings per CPU package */
int smp_num_siblings = 1;
@ -1167,6 +1168,13 @@ int __cpuinit __cpu_up(unsigned int cpu)
while (!cpu_isset(cpu, cpu_online_map))
cpu_relax();
if (num_online_cpus() > 8 && genapic == &apic_flat) {
printk(KERN_WARNING
"flat APIC routing can't be used with > 8 cpus\n");
BUG();
}
err = 0;
return err;

2
include/asm-i386/genapic.h
View File

@ -122,6 +122,6 @@ struct genapic {
APICFUNC(phys_pkg_id) \
}
extern struct genapic *genapic;
extern struct genapic *genapic, apic_default;
#endif

2
include/asm-i386/irq.h
View File

@ -37,6 +37,8 @@ static __inline__ int irq_canonicalize(int irq)
extern int irqbalance_disable(char *str);
#endif
extern void quirk_intel_irqbalance(void);
#ifdef CONFIG_HOTPLUG_CPU
extern void fixup_irqs(cpumask_t map);
#endif

1
include/asm-x86_64/proto.h
View File

@ -87,6 +87,7 @@ extern void syscall32_cpu_init(void);
extern void setup_node_bootmem(int nodeid, unsigned long start, unsigned long end);
extern void early_quirks(void);
extern void quirk_intel_irqbalance(void);
extern void check_efer(void);
extern int unhandled_signal(struct task_struct *tsk, int sig);