x86: disable hpet on shutdown
If HPET was enabled by pci quirks, we use i8253 as initial clockevent
because pci quirks doesn't run until pci is initialized.
The above means the kernel (or something) is assuming HPET legacy
replacement is disabled and can use i8253 at boot.
If we used kexec, it isn't true. So, this patch disables HPET legacy
replacement for kexec in machine_shutdown().
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/asm-x86/hpet.h b/include/asm-x86/hpet.h
index b1f3c1e..ad8d6e7 100644
--- a/include/asm-x86/hpet.h
+++ b/include/asm-x86/hpet.h
@@ -61,6 +61,7 @@
extern int hpet_force_user;
extern int is_hpet_enabled(void);
extern int hpet_enable(void);
+extern void hpet_disable(void);
extern unsigned long hpet_readl(unsigned long a);
extern void force_hpet_resume(void);