From d0537508a9921efced238b20967e50e519ac34af Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Sat, 25 Jun 2005 14:57:52 -0700 Subject: [PATCH] kexec: x86_64: add CONFIG_PHYSICAL_START For one kernel to report a crash another kernel has created we need to have 2 kernels loaded simultaneously in memory. To accomplish this the two kernels need to built to run at different physical addresses. This patch adds the CONFIG_PHYSICAL_START option to the x86_64 kernel so we can do just that. You need to know what you are doing and the ramifications are before changing this value, and most users won't care so I have made it depend on CONFIG_EMBEDDED bzImage kernels will work and run at a different address when compiled with this option but they will still load at 1MB. If you need a kernel loaded at a different address as well you need to boot a vmlinux. Signed-off-by: Eric Biederman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86_64/Kconfig | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'arch/x86_64/Kconfig') diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig index a853d87ff7e3..56c02cf6397d 100644 --- a/arch/x86_64/Kconfig +++ b/arch/x86_64/Kconfig @@ -369,6 +369,17 @@ config X86_MCE_INTEL Additional support for intel specific MCE features such as the thermal monitor. +config PHYSICAL_START + hex "Physical address where the kernel is loaded" if EMBEDDED + default "0x100000" + help + This gives the physical address where the kernel is loaded. + Primarily used in the case of kexec on panic where the + fail safe kernel needs to run at a different address than + the panic-ed kernel. + + Don't change this unless you know what you are doing. + config SECCOMP bool "Enable seccomp to safely compute untrusted bytecode" depends on PROC_FS -- cgit v1.2.3