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authorSuresh Siddha <suresh.b.siddha@intel.com>2010-02-09 18:01:44 -0800
committerH. Peter Anvin <hpa@zytor.com>2010-02-09 20:51:11 -0800
commit681ee44d40d7c93b42118320e4620d07d8704fd6 (patch)
treea6bbec20a6310b8ead96807b2e7f381873b6443b /arch/x86/kernel/acpi
parentcf9db6c41f739a294286847aab1e85f39aef1781 (diff)
x86, apic: Don't use logical-flat mode when CPU hotplug may exceed 8 CPUs
We need to fall back from logical-flat APIC mode to physical-flat mode when we have more than 8 CPUs. However, in the presence of CPU hotplug(with bios listing not enabled but possible cpus as disabled cpus in MADT), we have to consider the number of possible CPUs rather than the number of current CPUs; otherwise we may cross the 8-CPU boundary when CPUs are added later. 32bit apic code can use more cleanups (like the removal of vendor checks in 32bit default_setup_apic_routing()) and more unifications with 64bit code. Yinghai has some patches in works already. This patch addresses the boot issue that is reported in the virtualization guest context. [ hpa: incorporated function annotation feedback from Yinghai Lu ] Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> LKML-Reference: <1265767304.2833.19.camel@sbs-t61.sc.intel.com> Acked-by: Shaohui Zheng <shaohui.zheng@intel.com> Reviewed-by: Yinghai Lu <yinghai@kernel.org> Cc: <stable@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/kernel/acpi')
-rw-r--r--arch/x86/kernel/acpi/boot.c5
1 files changed, 0 insertions, 5 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 036d28adf59..0acbcdfa5ca 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -1185,9 +1185,6 @@ static void __init acpi_process_madt(void)
if (!error) {
acpi_lapic = 1;
-#ifdef CONFIG_X86_BIGSMP
- generic_bigsmp_probe();
-#endif
/*
* Parse MADT IO-APIC entries
*/
@@ -1197,8 +1194,6 @@ static void __init acpi_process_madt(void)
acpi_ioapic = 1;
smp_found_config = 1;
- if (apic->setup_apic_routing)
- apic->setup_apic_routing();
}
}
if (error == -EINVAL) {