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Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/Kconfig5
-rw-r--r--arch/x86/kernel/machine_kexec_32.c12
2 files changed, 15 insertions, 2 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 7ecb679f013..6b2debfabdd 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1282,9 +1282,10 @@ config CRASH_DUMP
config KEXEC_JUMP
bool "kexec jump (EXPERIMENTAL)"
depends on EXPERIMENTAL
- depends on KEXEC && PM_SLEEP && X86_32
+ depends on KEXEC && HIBERNATION && X86_32
help
- Invoke code in physical address mode via KEXEC
+ Jump between original kernel and kexeced kernel and invoke
+ code in physical address mode via KEXEC
config PHYSICAL_START
hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
diff --git a/arch/x86/kernel/machine_kexec_32.c b/arch/x86/kernel/machine_kexec_32.c
index 2b67609d0a1..9fe478d9840 100644
--- a/arch/x86/kernel/machine_kexec_32.c
+++ b/arch/x86/kernel/machine_kexec_32.c
@@ -125,6 +125,18 @@ void machine_kexec(struct kimage *image)
/* Interrupts aren't acceptable while we reboot */
local_irq_disable();
+ if (image->preserve_context) {
+#ifdef CONFIG_X86_IO_APIC
+ /* We need to put APICs in legacy mode so that we can
+ * get timer interrupts in second kernel. kexec/kdump
+ * paths already have calls to disable_IO_APIC() in
+ * one form or other. kexec jump path also need
+ * one.
+ */
+ disable_IO_APIC();
+#endif
+ }
+
control_page = page_address(image->control_code_page);
memcpy(control_page, relocate_kernel, PAGE_SIZE/2);