Merge branches 'x86/mmio', 'x86/delay', 'x86/idle', 'x86/oprofile', 'x86/debug',...

[linux-2.6] / arch / x86 / Kconfig

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 246f4ec6b0dc34fc2dc7890cb0c1144b1fd67ddd..7dc46ba26fbf56c8ab0bb152ab42f126d8f62bfb 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -383,6 +383,7 @@ config VMI
 config KVM_CLOCK
        bool "KVM paravirtualized clock"
        select PARAVIRT
+       select PARAVIRT_CLOCK
        depends on !(X86_VISWS || X86_VOYAGER)
        help
          Turning on this option will allow you to run a paravirtualized clock
@@ -410,37 +411,25 @@ config PARAVIRT
          over full virtualization.  However, when run without a hypervisor
          the kernel is theoretically slower and slightly larger.
 
+config PARAVIRT_CLOCK
+       bool
+       default n
+
 endif
 
-config MEMTEST_BOOTPARAM
-       bool "Memtest boot parameter"
+config MEMTEST
+       bool "Memtest"
        depends on X86_64
        default y
        help
          This option adds a kernel parameter 'memtest', which allows memtest
-         to be disabled at boot.  If this option is selected, memtest
-         functionality can be disabled with memtest=0 on the kernel
-         command line.  The purpose of this option is to allow a single
-         kernel image to be distributed with memtest built in, but not
-         necessarily enabled.
-
+         to be set.
+               memtest=0, mean disabled; -- default
+               memtest=1, mean do 1 test pattern;
+               ...
+               memtest=4, mean do 4 test patterns.
          If you are unsure how to answer this question, answer Y.
 
-config MEMTEST_BOOTPARAM_VALUE
-       int "Memtest boot parameter default value (0-4)"
-       depends on MEMTEST_BOOTPARAM
-       range 0 4
-       default 0
-       help
-         This option sets the default value for the kernel parameter
-         'memtest', which allows memtest to be disabled at boot.  If this
-         option is set to 0 (zero), the memtest kernel parameter will
-         default to 0, disabling memtest at bootup.  If this option is
-         set to 4, the memtest kernel parameter will default to 4,
-         enabling memtest at bootup, and use that as pattern number.
-
-         If you are unsure how to answer this question, answer 0.
-
 config ACPI_SRAT
        def_bool y
        depends on X86_32 && ACPI && NUMA && (X86_SUMMIT || X86_GENERICARCH)
@@ -544,6 +533,21 @@ config CALGARY_IOMMU_ENABLED_BY_DEFAULT
          Calgary anyway, pass 'iommu=calgary' on the kernel command line.
          If unsure, say Y.
 
+config AMD_IOMMU
+       bool "AMD IOMMU support"
+       select SWIOTLB
+       depends on X86_64 && PCI && ACPI
+       help
+         With this option you can enable support for AMD IOMMU hardware in
+         your system. An IOMMU is a hardware component which provides
+         remapping of DMA memory accesses from devices. With an AMD IOMMU you
+         can isolate the the DMA memory of different devices and protect the
+         system from misbehaving device drivers or hardware.
+
+         You can find out if your system has an AMD IOMMU if you look into
+         your BIOS for an option to enable it or if you have an IVRS ACPI
+         table.
+
 # need this always selected by IOMMU for the VIA workaround
 config SWIOTLB
        bool