1 files changed, 43 insertions, 29 deletions

diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig
index 8ff1c6fb5aa1..ea70359b02d0 100644
--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -182,6 +182,17 @@ config X86_ES7000
 
 endchoice
 
+config PARAVIRT
+        bool "Paravirtualization support (EXPERIMENTAL)"
+        depends on EXPERIMENTAL
+        help
+          Paravirtualization is a way of running multiple instances of
+          Linux on the same machine, under a hypervisor.  This option
+          changes the kernel so it can modify itself when it is run
+          under a hypervisor, improving performance significantly.
+          However, when run without a hypervisor the kernel is
+          theoretically slower.  If in doubt, say N.
+
 config ACPI_SRAT
         bool
         default y
@@ -443,7 +454,8 @@ source "drivers/firmware/Kconfig"
 
 choice
         prompt "High Memory Support"
-        default NOHIGHMEM
+        default HIGHMEM4G if !X86_NUMAQ
+        default HIGHMEM64G if X86_NUMAQ
 
 config NOHIGHMEM
         bool "off"
@@ -710,20 +722,6 @@ config BOOT_IOREMAP
         depends on (((X86_SUMMIT || X86_GENERICARCH) && NUMA) || (X86 && EFI))
         default y
 
-config REGPARM
-        bool "Use register arguments"
-        default y
-        help
-        Compile the kernel with -mregparm=3. This instructs gcc to use
-        a more efficient function call ABI which passes the first three
-        arguments of a function call via registers, which results in denser
-        and faster code.
-
-        If this option is disabled, then the default ABI of passing
-        arguments via the stack is used.
-
-        If unsure, say Y.
-
 config SECCOMP
         bool "Enable seccomp to safely compute untrusted bytecode"
         depends on PROC_FS
@@ -773,23 +771,39 @@ config CRASH_DUMP
           PHYSICAL_START.
           For more details see Documentation/kdump/kdump.txt
 
-config PHYSICAL_START
-        hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
+config RELOCATABLE
+        bool "Build a relocatable kernel(EXPERIMENTAL)"
+        depends on EXPERIMENTAL
+        help
+          This build a kernel image that retains relocation information
+          so it can be loaded someplace besides the default 1MB.
+          The relocations tend to the kernel binary about 10% larger,
+          but are discarded at runtime.
+
+          One use is for the kexec on panic case where the recovery kernel
+          must live at a different physical address than the primary
+          kernel.
 
-        default "0x1000000" if CRASH_DUMP
+config PHYSICAL_ALIGN
+        hex "Alignment value to which kernel should be aligned"
         default "0x100000"
+        range 0x2000 0x400000
         help
-          This gives the physical address where the kernel is loaded. Normally
-          for regular kernels this value is 0x100000 (1MB). But in the case
-          of kexec on panic the fail safe kernel needs to run at a different
-          address than the panic-ed kernel. This option is used to set the load
-          address for kernels used to capture crash dump on being kexec'ed
-          after panic. The default value for crash dump kernels is
-          0x1000000 (16MB). This can also be set based on the "X" value as
-          specified in the "crashkernel=YM@XM" command line boot parameter
-          passed to the panic-ed kernel. Typically this parameter is set as
-          crashkernel=64M@16M. Please take a look at
-          Documentation/kdump/kdump.txt for more details about crash dumps.
+          This value puts the alignment restrictions on physical address
+          where kernel is loaded and run from. Kernel is compiled for an
+          address which meets above alignment restriction.
+
+          If bootloader loads the kernel at a non-aligned address and
+          CONFIG_RELOCATABLE is set, kernel will move itself to nearest
+          address aligned to above value and run from there.
+
+          If bootloader loads the kernel at a non-aligned address and
+          CONFIG_RELOCATABLE is not set, kernel will ignore the run time
+          load address and decompress itself to the address it has been
+          compiled for and run from there. The address for which kernel is
+          compiled already meets above alignment restrictions. Hence the
+          end result is that kernel runs from a physical address meeting
+          above alignment restrictions.
 
           Don't change this unless you know what you are doing.