Ejemplo n.º 1
0
static void __restore_processor_state(struct saved_context *ctxt)
{
	/*
	 * control registers
	 */
	/* cr4 was introduced in the Pentium CPU */
	if (ctxt->cr4)
		write_cr4(ctxt->cr4);
	write_cr3(ctxt->cr3);
	write_cr2(ctxt->cr2);
	write_cr0(ctxt->cr0);

	/*
	 * now restore the descriptor tables to their proper values
	 * ltr is done i fix_processor_context().
	 */
	load_gdt(&ctxt->gdt);
	load_idt(&ctxt->idt);

	/*
	 * segment registers
	 */
	loadsegment(es, ctxt->es);
	loadsegment(fs, ctxt->fs);
	loadsegment(gs, ctxt->gs);
	loadsegment(ss, ctxt->ss);

	/*
	 * sysenter MSRs
	 */
	if (boot_cpu_has(X86_FEATURE_SEP))
		enable_sep_cpu();

	/*
	 * restore XCR0 for xsave capable cpu's.
	 */
	if (cpu_has_xsave)
		xsetbv(XCR_XFEATURE_ENABLED_MASK, pcntxt_mask);

	fix_processor_context();
	do_fpu_end();
	mtrr_ap_init();
	mcheck_init(&boot_cpu_data);
}
Ejemplo n.º 2
0
void __restore_processor_state(struct saved_context *ctxt)
{
	/*
	 * control registers
	 */
	write_cr4(ctxt->cr4);
	write_cr3(ctxt->cr3);
	write_cr2(ctxt->cr2);
	write_cr2(ctxt->cr0);

	/*
	 * now restore the descriptor tables to their proper values
	 * ltr is done i fix_processor_context().
	 */
 	load_gdt(&ctxt->gdt_limit);
 	load_idt(&ctxt->idt_limit);

	/*
	 * segment registers
	 */
 	loadsegment(es, ctxt->es);
 	loadsegment(fs, ctxt->fs);
 	loadsegment(gs, ctxt->gs);
 	loadsegment(ss, ctxt->ss);

#ifdef CONFIG_SYSENTER
	/*
	 * sysenter MSRs
	 */
	if (boot_cpu_has(X86_FEATURE_SEP))
		enable_sep_cpu();
#endif

	fix_processor_context();
	do_fpu_end();
	mtrr_ap_init();
}