From: Naga Chumbalkar Date: Tue, 26 May 2009 21:48:07 +0000 (+0000) Subject: x86: Print real IOAPIC version for x86-64 X-Git-Tag: v2.6.31-rc1~423^2~2 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;ds=sidebyside;h=58f892e022e88438183c48661dcdc6a2997dab99;p=pandora-kernel.git x86: Print real IOAPIC version for x86-64 Fix the fact that the IOAPIC version number in the x86_64 code path always gets assigned to 0, instead of the correct value. Before the patch: (from "dmesg" output): ACPI: IOAPIC (id[0x08] address[0xfec00000] gsi_base[0]) IOAPIC[0]: apic_id 8, version 0, address 0xfec00000, GSI 0-23 <--- After the patch: ACPI: IOAPIC (id[0x08] address[0xfec00000] gsi_base[0]) IOAPIC[0]: apic_id 8, version 32, address 0xfec00000, GSI 0-23 <--- History: io_apic_get_version() was compiled out of the x86_64 code path in the commit f2c2cca3acef8b253a36381d9b469ad4fb08563a: Author: Andi Kleen Date: Tue Sep 26 10:52:37 2006 +0200 [PATCH] Remove APIC version/cpu capability mpparse checking/printing ACPI went to great trouble to get the APIC version and CPU capabilities of different CPUs before passing them to the mpparser. But all that data was used was to print it out. Actually it even faked some data based on the boot cpu, not on the actual CPU being booted. Remove all this code because it's not needed. Cc: len.brown@intel.com At the time, the IOAPIC version number was deliberately not printed in the x86_64 code path. However, after the x86 and x86_64 files were merged, the net result is that the IOAPIC version is printed incorrectly in the x86_64 code path. The patch below provides a fix. I have tested it with acpi, and with acpi=off, and did not see any problems. Signed-off-by: Naga Chumbalkar Acked-by: Yinghai Lu LKML-Reference: <20090416014230.4885.94926.sendpatchset@localhost.localdomain> Signed-off-by: Ingo Molnar ************************* --- diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 844e5e25213b..631086159c53 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -985,11 +985,8 @@ void __init mp_register_ioapic(int id, u32 address, u32 gsi_base) set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address); mp_ioapics[idx].apicid = uniq_ioapic_id(id); -#ifdef CONFIG_X86_32 mp_ioapics[idx].apicver = io_apic_get_version(idx); -#else - mp_ioapics[idx].apicver = 0; -#endif + /* * Build basic GSI lookup table to facilitate gsi->io_apic lookups * and to prevent reprogramming of IOAPIC pins (PCI GSIs). diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index ac7f3b6ad583..f712f8ff403c 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -4012,6 +4012,7 @@ int __init io_apic_get_unique_id(int ioapic, int apic_id) return apic_id; } +#endif int __init io_apic_get_version(int ioapic) { @@ -4024,7 +4025,6 @@ int __init io_apic_get_version(int ioapic) return reg_01.bits.version; } -#endif int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity) {