08b6d290f9
additional section for .init.text appending a number. A side effect of this was a section mismatch warning because modpost did not recognize a .init.text section named .init.text.1: WARNING: vmlinux.o(.text.head+0x247): Section mismatch: reference to .init.text.1:start_kernel (between 'is386' and 'check_x87') Fix this by hardcoding the "ax" in the pushsection. Thanks to Torlaf for reporting this. Alan Modra provided the hint that made me able to locate the root cause of this warning. And Mike Frysinger told me how to properly fix it using __INIT/__FINIT. Fix following Section mismatch warning in addition: WARNING: vmlinux.o(.text+0x14c8): Section mismatch: reference to .init.data:vsyscall_int80_start (between 'fiddle_vdso' and 'xen_setup_features') fiddle_vdso was only used from a __init function - so declare it __init. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Chris Wright <chrisw@sous-sol.org> Cc: WANG Cong <xiyou.wangcong@gmail.com> Cc: Toralf Förster <toralf.foerster@gmx.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
/*
|
|
* Machine specific setup for xen
|
|
*
|
|
* Jeremy Fitzhardinge <jeremy@xensource.com>, XenSource Inc, 2007
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/pm.h>
|
|
|
|
#include <asm/elf.h>
|
|
#include <asm/vdso.h>
|
|
#include <asm/e820.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/xen/hypervisor.h>
|
|
#include <asm/xen/hypercall.h>
|
|
|
|
#include <xen/interface/physdev.h>
|
|
#include <xen/features.h>
|
|
|
|
#include "xen-ops.h"
|
|
#include "vdso.h"
|
|
|
|
/* These are code, but not functions. Defined in entry.S */
|
|
extern const char xen_hypervisor_callback[];
|
|
extern const char xen_failsafe_callback[];
|
|
|
|
unsigned long *phys_to_machine_mapping;
|
|
EXPORT_SYMBOL(phys_to_machine_mapping);
|
|
|
|
/**
|
|
* machine_specific_memory_setup - Hook for machine specific memory setup.
|
|
**/
|
|
|
|
char * __init xen_memory_setup(void)
|
|
{
|
|
unsigned long max_pfn = xen_start_info->nr_pages;
|
|
|
|
e820.nr_map = 0;
|
|
add_memory_region(0, PFN_PHYS(max_pfn), E820_RAM);
|
|
|
|
return "Xen";
|
|
}
|
|
|
|
static void xen_idle(void)
|
|
{
|
|
local_irq_disable();
|
|
|
|
if (need_resched())
|
|
local_irq_enable();
|
|
else {
|
|
current_thread_info()->status &= ~TS_POLLING;
|
|
smp_mb__after_clear_bit();
|
|
safe_halt();
|
|
current_thread_info()->status |= TS_POLLING;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Set the bit indicating "nosegneg" library variants should be used.
|
|
*/
|
|
static void __init fiddle_vdso(void)
|
|
{
|
|
extern const char vdso32_default_start;
|
|
u32 *mask = VDSO32_SYMBOL(&vdso32_default_start, NOTE_MASK);
|
|
*mask |= 1 << VDSO_NOTE_NONEGSEG_BIT;
|
|
}
|
|
|
|
void __init xen_arch_setup(void)
|
|
{
|
|
struct physdev_set_iopl set_iopl;
|
|
int rc;
|
|
|
|
HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments);
|
|
HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_writable_pagetables);
|
|
|
|
if (!xen_feature(XENFEAT_auto_translated_physmap))
|
|
HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_pae_extended_cr3);
|
|
|
|
HYPERVISOR_set_callbacks(__KERNEL_CS, (unsigned long)xen_hypervisor_callback,
|
|
__KERNEL_CS, (unsigned long)xen_failsafe_callback);
|
|
|
|
set_iopl.iopl = 1;
|
|
rc = HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl);
|
|
if (rc != 0)
|
|
printk(KERN_INFO "physdev_op failed %d\n", rc);
|
|
|
|
#ifdef CONFIG_ACPI
|
|
if (!(xen_start_info->flags & SIF_INITDOMAIN)) {
|
|
printk(KERN_INFO "ACPI in unprivileged domain disabled\n");
|
|
disable_acpi();
|
|
}
|
|
#endif
|
|
|
|
memcpy(boot_command_line, xen_start_info->cmd_line,
|
|
MAX_GUEST_CMDLINE > COMMAND_LINE_SIZE ?
|
|
COMMAND_LINE_SIZE : MAX_GUEST_CMDLINE);
|
|
|
|
pm_idle = xen_idle;
|
|
|
|
#ifdef CONFIG_SMP
|
|
/* fill cpus_possible with all available cpus */
|
|
xen_fill_possible_map();
|
|
#endif
|
|
|
|
paravirt_disable_iospace();
|
|
|
|
fiddle_vdso();
|
|
}
|