x86: memtest bootparam

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 29 insertions, 0 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index e50e38e76d9f..a0d7406e8b37 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -382,6 +382,35 @@ config PARAVIRT
 
 endif
 
+config MEMTEST_BOOTPARAM
+        bool "Memtest boot parameter"
+        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.
+
+          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)