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| author | Yinghai Lu <yinghai@kernel.org> | 2009-02-16 17:29:58 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-17 12:22:20 +0100 |
| commit | 06cd9a7dc8a58186060a91b6ddc031057435fd34 (patch) | |
| tree | cc015c3a966f31ef77cb458e0b480ffc0eb12acd /arch/x86/Kconfig | |
| parent | 9f361c221912b6ffa1f7836e0bbf843917f6fce7 (diff) | |
| download | linux-stable-06cd9a7dc8a58186060a91b6ddc031057435fd34.tar.gz linux-stable-06cd9a7dc8a58186060a91b6ddc031057435fd34.tar.bz2 linux-stable-06cd9a7dc8a58186060a91b6ddc031057435fd34.zip | |
x86: add x2apic config
Impact: cleanup
so could deselect x2apic
and INTR_REMAP will select x2apic
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 1042d69b267d..bce241fe1d2d 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -235,6 +235,20 @@ config SMP If you don't know what to do here, say N. +config X86_X2APIC + bool "Support x2apic" + depends on X86_LOCAL_APIC && X86_64 + ---help--- + This enables x2apic support on CPUs that have this feature. + + This allows 32-bit apic IDs (so it can support very large systems), + and accesses the local apic via MSRs not via mmio. + + ( On certain CPU models you may need to enable INTR_REMAP too, + to get functional x2apic mode. ) + + If you don't know what to do here, say N. + config SPARSE_IRQ bool "Support sparse irq numbering" depends on PCI_MSI || HT_IRQ @@ -1828,6 +1842,7 @@ config DMAR_FLOPPY_WA config INTR_REMAP bool "Support for Interrupt Remapping (EXPERIMENTAL)" depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL + select X86_X2APIC ---help--- Supports Interrupt remapping for IO-APIC and MSI devices. To use x2apic mode in the CPU's which support x2APIC enhancements or |