Hi, I experience this "kernel panic during boot" with acpi=off and IIRC pci=noacpi, but what I like to know if this can resolve any other problems on my bug: http://bugzilla.kernel.org/show_bug.cgi?id=6419 http://bugzilla.kernel.org/show_bug.cgi?id=6419#c17 btw I will try this patch anyway Thanks, On Thu, 2006-06-01 at 20:18 -0700, akpm@xxxxxxxx wrote: > From: "Andy Currid" <ACurrid@xxxxxxxxxx> > > This patch fixes a kernel panic during boot that occurs on NVIDIA platforms > that have HPET enabled. > > When HPET is enabled, the standard timer IRQ is routed to IOAPIC pin 2 and is > advertised as such in the ACPI APIC table - but an earlier workaround in the > kernel was ignoring this override. The fix is to honor timer IRQ overrides > from ACPI when HPET is detected on an NVIDIA platform. > > Signed-off-by: Andy Currid <acurrid@xxxxxxxxxx> > Cc: "Brown, Len" <len.brown@xxxxxxxxx> > Cc: "Yu, Luming" <luming.yu@xxxxxxxxx> > Cc: Andi Kleen <ak@xxxxxx> > Signed-off-by: Andrew Morton <akpm@xxxxxxxx> > --- > > arch/x86_64/kernel/io_apic.c | 30 +++++++++++++++++++++++++----- > 1 file changed, 25 insertions(+), 5 deletions(-) > > diff -puN arch/x86_64/kernel/io_apic.c~fix-hpet-operation-on-64-bit-nvidia-platforms arch/x86_64/kernel/io_apic.c > --- devel/arch/x86_64/kernel/io_apic.c~fix-hpet-operation-on-64-bit-nvidia-platforms 2006-06-01 20:17:10.000000000 -0700 > +++ devel-akpm/arch/x86_64/kernel/io_apic.c 2006-06-01 20:17:10.000000000 -0700 > @@ -271,6 +271,18 @@ __setup("enable_8254_timer", setup_enabl > #include <linux/pci_ids.h> > #include <linux/pci.h> > > + > +#ifdef CONFIG_ACPI > + > +static int nvidia_hpet_detected __initdata; > + > +static int __init nvidia_hpet_check(unsigned long phys, unsigned long size) > +{ > + nvidia_hpet_detected = 1; > + return 0; > +} > +#endif > + > /* Temporary Hack. Nvidia and VIA boards currently only work with IO-APIC > off. Check for an Nvidia or VIA PCI bridge and turn it off. > Use pci direct infrastructure because this runs before the PCI subsystem. > @@ -317,11 +329,19 @@ void __init check_ioapic(void) > return; > case PCI_VENDOR_ID_NVIDIA: > #ifdef CONFIG_ACPI > - /* All timer overrides on Nvidia > - seem to be wrong. Skip them. */ > - acpi_skip_timer_override = 1; > - printk(KERN_INFO > - "Nvidia board detected. Ignoring ACPI timer override.\n"); > + /* > + * All timer overrides on Nvidia are > + * wrong unless HPET is enabled. > + */ > + nvidia_hpet_detected = 0; > + acpi_table_parse(ACPI_HPET, > + nvidia_hpet_check); > + if (nvidia_hpet_detected == 0) { > + acpi_skip_timer_override = 1; > + printk(KERN_INFO "Nvidia board " > + "detected. Ignoring ACPI " > + "timer override.\n"); > + } > #endif > /* RED-PEN skip them on mptables too? */ > return; > _ > - > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
