Commit 77ad386e authored by Ingo Molnar's avatar Ingo Molnar
Browse files

x86: standalone trampoline code 



move the trampoline setup code out of smpboot.c - UP kernels can have
suspend support too.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent e44b7b75

arch/x86/kernel/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ obj-y += alternative.o i8253.o 
obj-$(CONFIG_X86_64)	+= pci-nommu_64.o bugs_64.o

obj-y			+= tsc_$(BITS).o io_delay.o rtc.o



obj-$(CONFIG_X86_TRAMPOLINE)	+= trampoline.o

obj-y				+= i387.o

obj-y				+= ptrace.o

obj-y				+= ds.o

arch/x86/kernel/smpboot.c

+0 −15
Original line number Diff line number Diff line
@@ -140,9 +140,6 @@ static atomic_t init_deasserted; 


static int boot_cpu_logical_apicid;



/* ready for x86_64, no harm for x86, since it will overwrite after alloc */

unsigned char *trampoline_base = __va(TRAMPOLINE_BASE);



/* representing cpus for which sibling maps can be computed */

static cpumask_t cpu_sibling_setup_map;
@@ -550,18 +547,6 @@ cpumask_t cpu_coregroup_map(int cpu) 
		return c->llc_shared_map;

}



/*

 * Currently trivial. Write the real->protected mode

 * bootstrap into the page concerned. The caller

 * has made sure it's suitably aligned.

 */

unsigned long setup_trampoline(void)

{

	memcpy(trampoline_base, trampoline_data,

	       trampoline_end - trampoline_data);

	return virt_to_phys(trampoline_base);

}



#ifdef CONFIG_X86_32

/*

 * We are called very early to get the low memory for the

arch/x86/kernel/trampoline.c

0 → 100644
+18 −0
Original line number Diff line number Diff line 
#include <linux/io.h>



#include <asm/trampoline.h>



/* ready for x86_64, no harm for x86, since it will overwrite after alloc */

unsigned char *trampoline_base = __va(TRAMPOLINE_BASE);



/*

 * Currently trivial. Write the real->protected mode

 * bootstrap into the page concerned. The caller

 * has made sure it's suitably aligned.

 */

unsigned long setup_trampoline(void)

{

	memcpy(trampoline_base, trampoline_data,

	       trampoline_end - trampoline_data);

	return virt_to_phys(trampoline_base);

}