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x86-64, reboot: Allow reboot=bios and reboot-cpu override on x86-64

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With the revamped realmode trampoline code, it is trivial to extend
support for reboot=bios to x86-64.  Furthermore, while we are at it,
remove the restriction that only we can only override the reboot CPU
on 32 bits.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Link: http://lkml.kernel.org/n/tip-jopx7y6g6dbcx4tpal8q0jlr@git.kernel.org
This commit is contained in:
H. Peter Anvin
2012-06-16 21:47:37 -07:00
parent cfaf025112
commit 650513979a
7 changed files with 55 additions and 38 deletions
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4
arch/x86/include/asm/reboot.h
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@@ -18,8 +18,8 @@ extern struct machine_ops machine_ops;
void native_machine_crash_shutdown(struct pt_regs *regs);
void native_machine_shutdown(void);
void machine_real_restart(unsigned int type);
/* These must match dispatch_table in reboot_32.S */
void __noreturn machine_real_restart(unsigned int type);
/* These must match dispatch in arch/x86/realmore/rm/reboot.S */
#define MRR_BIOS 0
#define MRR_APM 1