+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/module.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/pm.h>
#include <linux/efi.h>
+#include <linux/dmi.h>
+#include <linux/sched.h>
+#include <linux/tboot.h>
+#include <linux/delay.h>
#include <acpi/reboot.h>
#include <asm/io.h>
#include <asm/apic.h>
#include <asm/pci_x86.h>
#include <asm/virtext.h>
#include <asm/cpu.h>
+#include <asm/nmi.h>
+#include <asm/smp.h>
-#ifdef CONFIG_X86_32
-# include <linux/dmi.h>
-# include <linux/ctype.h>
-# include <linux/mc146818rtc.h>
-#else
-# include <asm/iommu.h>
-#endif
-
-#include <mach_ipi.h>
+#include <linux/ctype.h>
+#include <linux/mc146818rtc.h>
+#include <asm/realmode.h>
+#include <asm/x86_init.h>
/*
* Power off function, if any
EXPORT_SYMBOL(pm_power_off);
static const struct desc_ptr no_idt = {};
-static int reboot_mode;
-enum reboot_type reboot_type = BOOT_KBD;
+static enum reboot_mode reboot_mode;
+enum reboot_type reboot_type = BOOT_ACPI;
int reboot_force;
-#if defined(CONFIG_X86_32) && defined(CONFIG_SMP)
+/*
+ * This variable is used privately to keep track of whether or not
+ * reboot_type is still set to its default value (i.e., reboot= hasn't
+ * been set on the command line). This is needed so that we can
+ * suppress DMI scanning for reboot quirks. Without it, it's
+ * impossible to override a faulty reboot quirk without recompiling.
+ */
+static int reboot_default = 1;
+
+#ifdef CONFIG_SMP
static int reboot_cpu = -1;
#endif
-/* This is set if we need to go through the 'emergency' path.
+/*
+ * This is set if we need to go through the 'emergency' path.
* When machine_emergency_restart() is called, we may be on
* an inconsistent state and won't be able to do a clean cleanup
*/
/* This is set by the PCI code if either type 1 or type 2 PCI is detected */
bool port_cf9_safe = false;
-/* reboot=b[ios] | s[mp] | t[riple] | k[bd] | e[fi] [, [w]arm | [c]old] | p[ci]
- warm Don't set the cold reboot flag
- cold Set the cold reboot flag
- bios Reboot by jumping through the BIOS (only for X86_32)
- smp Reboot by executing reset on BSP or other CPU (only for X86_32)
- triple Force a triple fault (init)
- kbd Use the keyboard controller. cold reset (default)
- acpi Use the RESET_REG in the FADT
- efi Use efi reset_system runtime service
- pci Use the so-called "PCI reset register", CF9
- force Avoid anything that could hang.
+/*
+ * reboot=b[ios] | s[mp] | t[riple] | k[bd] | e[fi] [, [w]arm | [c]old] | p[ci]
+ * warm Don't set the cold reboot flag
+ * cold Set the cold reboot flag
+ * bios Reboot by jumping through the BIOS
+ * smp Reboot by executing reset on BSP or other CPU
+ * triple Force a triple fault (init)
+ * kbd Use the keyboard controller. cold reset (default)
+ * acpi Use the RESET_REG in the FADT
+ * efi Use efi reset_system runtime service
+ * pci Use the so-called "PCI reset register", CF9
+ * force Avoid anything that could hang.
*/
static int __init reboot_setup(char *str)
{
for (;;) {
+ /*
+ * Having anything passed on the command line via
+ * reboot= will cause us to disable DMI checking
+ * below.
+ */
+ reboot_default = 0;
+
switch (*str) {
case 'w':
- reboot_mode = 0x1234;
+ reboot_mode = REBOOT_WARM;
break;
case 'c':
- reboot_mode = 0;
+ reboot_mode = REBOOT_COLD;
break;
-#ifdef CONFIG_X86_32
#ifdef CONFIG_SMP
case 's':
if (isdigit(*(str+1))) {
if (isdigit(*(str+2)))
reboot_cpu = reboot_cpu*10 + (int)(*(str+2) - '0');
}
- /* we will leave sorting out the final value
- when we are ready to reboot, since we might not
- have set up boot_cpu_id or smp_num_cpu */
+ /*
+ * We will leave sorting out the final value
+ * when we are ready to reboot, since we might not
+ * have detected BSP APIC ID or smp_num_cpu
+ */
break;
#endif /* CONFIG_SMP */
case 'b':
-#endif
case 'a':
case 'k':
case 't':
__setup("reboot=", reboot_setup);
-#ifdef CONFIG_X86_32
/*
* Reboot options and system auto-detection code provided by
* Dell Inc. so their systems "just work". :-)
*/
/*
- * Some machines require the "reboot=b" commandline option,
+ * Some machines require the "reboot=b" or "reboot=k" commandline options,
* this quirk makes that automatic.
*/
static int __init set_bios_reboot(const struct dmi_system_id *d)
{
if (reboot_type != BOOT_BIOS) {
reboot_type = BOOT_BIOS;
- printk(KERN_INFO "%s series board detected. Selecting BIOS-method for reboots.\n", d->ident);
+ pr_info("%s series board detected. Selecting %s-method for reboots.\n",
+ "BIOS", d->ident);
+ }
+ return 0;
+}
+
+void __noreturn machine_real_restart(unsigned int type)
+{
+ local_irq_disable();
+
+ /*
+ * Write zero to CMOS register number 0x0f, which the BIOS POST
+ * routine will recognize as telling it to do a proper reboot. (Well
+ * that's what this book in front of me says -- it may only apply to
+ * the Phoenix BIOS though, it's not clear). At the same time,
+ * disable NMIs by setting the top bit in the CMOS address register,
+ * as we're about to do peculiar things to the CPU. I'm not sure if
+ * `outb_p' is needed instead of just `outb'. Use it to be on the
+ * safe side. (Yes, CMOS_WRITE does outb_p's. - Paul G.)
+ */
+ spin_lock(&rtc_lock);
+ CMOS_WRITE(0x00, 0x8f);
+ spin_unlock(&rtc_lock);
+
+ /*
+ * Switch back to the initial page table.
+ */
+#ifdef CONFIG_X86_32
+ load_cr3(initial_page_table);
+#else
+ write_cr3(real_mode_header->trampoline_pgd);
+#endif
+
+ /* Jump to the identity-mapped low memory code */
+#ifdef CONFIG_X86_32
+ asm volatile("jmpl *%0" : :
+ "rm" (real_mode_header->machine_real_restart_asm),
+ "a" (type));
+#else
+ asm volatile("ljmpl *%0" : :
+ "m" (real_mode_header->machine_real_restart_asm),
+ "D" (type));
+#endif
+ unreachable();
+}
+#ifdef CONFIG_APM_MODULE
+EXPORT_SYMBOL(machine_real_restart);
+#endif
+
+/*
+ * Some Apple MacBook and MacBookPro's needs reboot=p to be able to reboot
+ */
+static int __init set_pci_reboot(const struct dmi_system_id *d)
+{
+ if (reboot_type != BOOT_CF9) {
+ reboot_type = BOOT_CF9;
+ pr_info("%s series board detected. Selecting %s-method for reboots.\n",
+ "PCI", d->ident);
}
return 0;
}
+static int __init set_kbd_reboot(const struct dmi_system_id *d)
+{
+ if (reboot_type != BOOT_KBD) {
+ reboot_type = BOOT_KBD;
+ pr_info("%s series board detected. Selecting %s-method for reboot.\n",
+ "KBD", d->ident);
+ }
+ return 0;
+}
+
+/*
+ * This is a single dmi_table handling all reboot quirks.
+ */
static struct dmi_system_id __initdata reboot_dmi_table[] = {
{ /* Handle problems with rebooting on Dell E520's */
.callback = set_bios_reboot,
DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 300/"),
},
},
- { /* Handle problems with rebooting on Dell Optiplex 745's SFF*/
+ { /* Handle problems with rebooting on Dell Optiplex 745's SFF */
.callback = set_bios_reboot,
.ident = "Dell OptiPlex 745",
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"),
},
},
- { /* Handle problems with rebooting on Dell Optiplex 745's DFF*/
+ { /* Handle problems with rebooting on Dell Optiplex 745's DFF */
.callback = set_bios_reboot,
.ident = "Dell OptiPlex 745",
.matches = {
DMI_MATCH(DMI_BOARD_NAME, "0MM599"),
},
},
- { /* Handle problems with rebooting on Dell Optiplex 745 with 0KW626 */
+ { /* Handle problems with rebooting on Dell Optiplex 745 with 0KW626 */
.callback = set_bios_reboot,
.ident = "Dell OptiPlex 745",
.matches = {
DMI_MATCH(DMI_BOARD_NAME, "0KW626"),
},
},
- { /* Handle problems with rebooting on Dell Optiplex 330 with 0KP561 */
+ { /* Handle problems with rebooting on Dell Optiplex 330 with 0KP561 */
.callback = set_bios_reboot,
.ident = "Dell OptiPlex 330",
.matches = {
DMI_MATCH(DMI_BOARD_NAME, "0KP561"),
},
},
+ { /* Handle problems with rebooting on Dell Optiplex 360 with 0T656F */
+ .callback = set_bios_reboot,
+ .ident = "Dell OptiPlex 360",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 360"),
+ DMI_MATCH(DMI_BOARD_NAME, "0T656F"),
+ },
+ },
+ { /* Handle problems with rebooting on Dell OptiPlex 760 with 0G919G */
+ .callback = set_bios_reboot,
+ .ident = "Dell OptiPlex 760",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 760"),
+ DMI_MATCH(DMI_BOARD_NAME, "0G919G"),
+ },
+ },
{ /* Handle problems with rebooting on Dell 2400's */
.callback = set_bios_reboot,
.ident = "Dell PowerEdge 2400",
DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T5400"),
},
},
+ { /* Handle problems with rebooting on Dell T7400's */
+ .callback = set_bios_reboot,
+ .ident = "Dell Precision T7400",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T7400"),
+ },
+ },
{ /* Handle problems with rebooting on HP laptops */
.callback = set_bios_reboot,
.ident = "HP Compaq Laptop",
DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq"),
},
},
+ { /* Handle problems with rebooting on Dell XPS710 */
+ .callback = set_bios_reboot,
+ .ident = "Dell XPS710",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Dell XPS710"),
+ },
+ },
+ { /* Handle problems with rebooting on Dell DXP061 */
+ .callback = set_bios_reboot,
+ .ident = "Dell DXP061",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Dell DXP061"),
+ },
+ },
+ { /* Handle problems with rebooting on Sony VGN-Z540N */
+ .callback = set_bios_reboot,
+ .ident = "Sony VGN-Z540N",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "VGN-Z540N"),
+ },
+ },
+ { /* Handle problems with rebooting on ASUS P4S800 */
+ .callback = set_bios_reboot,
+ .ident = "ASUS P4S800",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "P4S800"),
+ },
+ },
+ { /* Handle problems with rebooting on the iMac10,1. */
+ .callback = set_pci_reboot,
+ .ident = "Apple iMac10,1",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "iMac10,1"),
+ },
+ },
+
+ { /* Handle reboot issue on Acer Aspire one */
+ .callback = set_kbd_reboot,
+ .ident = "Acer Aspire One A110",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
+ },
+ },
+ { /* Handle problems with rebooting on Apple MacBook5 */
+ .callback = set_pci_reboot,
+ .ident = "Apple MacBook5",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5"),
+ },
+ },
+ { /* Handle problems with rebooting on Apple MacBookPro5 */
+ .callback = set_pci_reboot,
+ .ident = "Apple MacBookPro5",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5"),
+ },
+ },
+ { /* Handle problems with rebooting on Apple Macmini3,1 */
+ .callback = set_pci_reboot,
+ .ident = "Apple Macmini3,1",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Macmini3,1"),
+ },
+ },
+ { /* Handle problems with rebooting on the iMac9,1. */
+ .callback = set_pci_reboot,
+ .ident = "Apple iMac9,1",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "iMac9,1"),
+ },
+ },
+ { /* Handle problems with rebooting on the Latitude E6320. */
+ .callback = set_pci_reboot,
+ .ident = "Dell Latitude E6320",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6320"),
+ },
+ },
+ { /* Handle problems with rebooting on the Latitude E5420. */
+ .callback = set_pci_reboot,
+ .ident = "Dell Latitude E5420",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5420"),
+ },
+ },
+ { /* Handle problems with rebooting on the Latitude E6420. */
+ .callback = set_pci_reboot,
+ .ident = "Dell Latitude E6420",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6420"),
+ },
+ },
+ { /* Handle problems with rebooting on the OptiPlex 990. */
+ .callback = set_pci_reboot,
+ .ident = "Dell OptiPlex 990",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 990"),
+ },
+ },
+ { /* Handle problems with rebooting on the Precision M6600. */
+ .callback = set_pci_reboot,
+ .ident = "Dell OptiPlex 990",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Precision M6600"),
+ },
+ },
+ { /* Handle problems with rebooting on the Dell PowerEdge C6100. */
+ .callback = set_pci_reboot,
+ .ident = "Dell PowerEdge C6100",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "C6100"),
+ },
+ },
+ { /* Some C6100 machines were shipped with vendor being 'Dell'. */
+ .callback = set_pci_reboot,
+ .ident = "Dell PowerEdge C6100",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "C6100"),
+ },
+ },
{ }
};
static int __init reboot_init(void)
{
- dmi_check_system(reboot_dmi_table);
- return 0;
-}
-core_initcall(reboot_init);
-
-/* The following code and data reboots the machine by switching to real
- mode and jumping to the BIOS reset entry point, as if the CPU has
- really been reset. The previous version asked the keyboard
- controller to pulse the CPU reset line, which is more thorough, but
- doesn't work with at least one type of 486 motherboard. It is easy
- to stop this code working; hence the copious comments. */
-static const unsigned long long
-real_mode_gdt_entries [3] =
-{
- 0x0000000000000000ULL, /* Null descriptor */
- 0x00009b000000ffffULL, /* 16-bit real-mode 64k code at 0x00000000 */
- 0x000093000100ffffULL /* 16-bit real-mode 64k data at 0x00000100 */
-};
-
-static const struct desc_ptr
-real_mode_gdt = { sizeof (real_mode_gdt_entries) - 1, (long)real_mode_gdt_entries },
-real_mode_idt = { 0x3ff, 0 };
-
-/* This is 16-bit protected mode code to disable paging and the cache,
- switch to real mode and jump to the BIOS reset code.
-
- The instruction that switches to real mode by writing to CR0 must be
- followed immediately by a far jump instruction, which set CS to a
- valid value for real mode, and flushes the prefetch queue to avoid
- running instructions that have already been decoded in protected
- mode.
-
- Clears all the flags except ET, especially PG (paging), PE
- (protected-mode enable) and TS (task switch for coprocessor state
- save). Flushes the TLB after paging has been disabled. Sets CD and
- NW, to disable the cache on a 486, and invalidates the cache. This
- is more like the state of a 486 after reset. I don't know if
- something else should be done for other chips.
-
- More could be done here to set up the registers as if a CPU reset had
- occurred; hopefully real BIOSs don't assume much. */
-static const unsigned char real_mode_switch [] =
-{
- 0x66, 0x0f, 0x20, 0xc0, /* movl %cr0,%eax */
- 0x66, 0x83, 0xe0, 0x11, /* andl $0x00000011,%eax */
- 0x66, 0x0d, 0x00, 0x00, 0x00, 0x60, /* orl $0x60000000,%eax */
- 0x66, 0x0f, 0x22, 0xc0, /* movl %eax,%cr0 */
- 0x66, 0x0f, 0x22, 0xd8, /* movl %eax,%cr3 */
- 0x66, 0x0f, 0x20, 0xc3, /* movl %cr0,%ebx */
- 0x66, 0x81, 0xe3, 0x00, 0x00, 0x00, 0x60, /* andl $0x60000000,%ebx */
- 0x74, 0x02, /* jz f */
- 0x0f, 0x09, /* wbinvd */
- 0x24, 0x10, /* f: andb $0x10,al */
- 0x66, 0x0f, 0x22, 0xc0 /* movl %eax,%cr0 */
-};
-static const unsigned char jump_to_bios [] =
-{
- 0xea, 0x00, 0x00, 0xff, 0xff /* ljmp $0xffff,$0x0000 */
-};
-
-/*
- * Switch to real mode and then execute the code
- * specified by the code and length parameters.
- * We assume that length will aways be less that 100!
- */
-void machine_real_restart(const unsigned char *code, int length)
-{
- local_irq_disable();
-
- /* Write zero to CMOS register number 0x0f, which the BIOS POST
- routine will recognize as telling it to do a proper reboot. (Well
- that's what this book in front of me says -- it may only apply to
- the Phoenix BIOS though, it's not clear). At the same time,
- disable NMIs by setting the top bit in the CMOS address register,
- as we're about to do peculiar things to the CPU. I'm not sure if
- `outb_p' is needed instead of just `outb'. Use it to be on the
- safe side. (Yes, CMOS_WRITE does outb_p's. - Paul G.)
- */
- spin_lock(&rtc_lock);
- CMOS_WRITE(0x00, 0x8f);
- spin_unlock(&rtc_lock);
-
- /* Remap the kernel at virtual address zero, as well as offset zero
- from the kernel segment. This assumes the kernel segment starts at
- virtual address PAGE_OFFSET. */
- memcpy(swapper_pg_dir, swapper_pg_dir + KERNEL_PGD_BOUNDARY,
- sizeof(swapper_pg_dir [0]) * KERNEL_PGD_PTRS);
-
/*
- * Use `swapper_pg_dir' as our page directory.
+ * Only do the DMI check if reboot_type hasn't been overridden
+ * on the command line
*/
- load_cr3(swapper_pg_dir);
-
- /* Write 0x1234 to absolute memory location 0x472. The BIOS reads
- this on booting to tell it to "Bypass memory test (also warm
- boot)". This seems like a fairly standard thing that gets set by
- REBOOT.COM programs, and the previous reset routine did this
- too. */
- *((unsigned short *)0x472) = reboot_mode;
-
- /* For the switch to real mode, copy some code to low memory. It has
- to be in the first 64k because it is running in 16-bit mode, and it
- has to have the same physical and virtual address, because it turns
- off paging. Copy it near the end of the first page, out of the way
- of BIOS variables. */
- memcpy((void *)(0x1000 - sizeof(real_mode_switch) - 100),
- real_mode_switch, sizeof (real_mode_switch));
- memcpy((void *)(0x1000 - 100), code, length);
-
- /* Set up the IDT for real mode. */
- load_idt(&real_mode_idt);
-
- /* Set up a GDT from which we can load segment descriptors for real
- mode. The GDT is not used in real mode; it is just needed here to
- prepare the descriptors. */
- load_gdt(&real_mode_gdt);
-
- /* Load the data segment registers, and thus the descriptors ready for
- real mode. The base address of each segment is 0x100, 16 times the
- selector value being loaded here. This is so that the segment
- registers don't have to be reloaded after switching to real mode:
- the values are consistent for real mode operation already. */
- __asm__ __volatile__ ("movl $0x0010,%%eax\n"
- "\tmovl %%eax,%%ds\n"
- "\tmovl %%eax,%%es\n"
- "\tmovl %%eax,%%fs\n"
- "\tmovl %%eax,%%gs\n"
- "\tmovl %%eax,%%ss" : : : "eax");
-
- /* Jump to the 16-bit code that we copied earlier. It disables paging
- and the cache, switches to real mode, and jumps to the BIOS reset
- entry point. */
- __asm__ __volatile__ ("ljmp $0x0008,%0"
- :
- : "i" ((void *)(0x1000 - sizeof (real_mode_switch) - 100)));
+ if (reboot_default)
+ dmi_check_system(reboot_dmi_table);
+ return 0;
}
-#ifdef CONFIG_APM_MODULE
-EXPORT_SYMBOL(machine_real_restart);
-#endif
-
-#endif /* CONFIG_X86_32 */
+core_initcall(reboot_init);
static inline void kb_wait(void)
{
}
}
-static void vmxoff_nmi(int cpu, struct die_args *args)
+static void vmxoff_nmi(int cpu, struct pt_regs *regs)
{
cpu_emergency_vmxoff();
}
-/* Use NMIs as IPIs to tell all CPUs to disable virtualization
- */
+/* Use NMIs as IPIs to tell all CPUs to disable virtualization */
static void emergency_vmx_disable_all(void)
{
/* Just make sure we won't change CPUs while doing this */
local_irq_disable();
- /* We need to disable VMX on all CPUs before rebooting, otherwise
+ /*
+ * We need to disable VMX on all CPUs before rebooting, otherwise
* we risk hanging up the machine, because the CPU ignore INIT
* signals when VMX is enabled.
*
* is still enabling VMX.
*/
if (cpu_has_vmx() && cpu_vmx_enabled()) {
- /* Disable VMX on this CPU.
- */
+ /* Disable VMX on this CPU. */
cpu_vmxoff();
/* Halt and disable VMX on the other CPUs */
{
}
+/*
+ * Windows compatible x86 hardware expects the following on reboot:
+ *
+ * 1) If the FADT has the ACPI reboot register flag set, try it
+ * 2) If still alive, write to the keyboard controller
+ * 3) If still alive, write to the ACPI reboot register again
+ * 4) If still alive, write to the keyboard controller again
+ *
+ * If the machine is still alive at this stage, it gives up. We default to
+ * following the same pattern, except that if we're still alive after (4) we'll
+ * try to force a triple fault and then cycle between hitting the keyboard
+ * controller and doing that
+ */
static void native_machine_emergency_restart(void)
{
int i;
+ int attempt = 0;
+ int orig_reboot_type = reboot_type;
+ unsigned short mode;
if (reboot_emergency)
emergency_vmx_disable_all();
+ tboot_shutdown(TB_SHUTDOWN_REBOOT);
+
/* Tell the BIOS if we want cold or warm reboot */
- *((unsigned short *)__va(0x472)) = reboot_mode;
+ mode = reboot_mode == REBOOT_WARM ? 0x1234 : 0;
+ *((unsigned short *)__va(0x472)) = mode;
for (;;) {
/* Could also try the reset bit in the Hammer NB */
switch (reboot_type) {
case BOOT_KBD:
- mach_reboot_fixups(); /* for board specific fixups */
+ mach_reboot_fixups(); /* For board specific fixups */
for (i = 0; i < 10; i++) {
kb_wait();
udelay(50);
- outb(0xfe, 0x64); /* pulse reset low */
+ outb(0xfe, 0x64); /* Pulse reset low */
udelay(50);
}
+ if (attempt == 0 && orig_reboot_type == BOOT_ACPI) {
+ attempt = 1;
+ reboot_type = BOOT_ACPI;
+ } else {
+ reboot_type = BOOT_TRIPLE;
+ }
+ break;
case BOOT_TRIPLE:
load_idt(&no_idt);
reboot_type = BOOT_KBD;
break;
-#ifdef CONFIG_X86_32
case BOOT_BIOS:
- machine_real_restart(jump_to_bios, sizeof(jump_to_bios));
+ machine_real_restart(MRR_BIOS);
reboot_type = BOOT_KBD;
break;
-#endif
case BOOT_ACPI:
acpi_reboot();
break;
case BOOT_EFI:
- if (efi_enabled)
- efi.reset_system(reboot_mode ?
+ if (efi_enabled(EFI_RUNTIME_SERVICES))
+ efi.reset_system(reboot_mode == REBOOT_WARM ?
EFI_RESET_WARM :
EFI_RESET_COLD,
EFI_SUCCESS, 0, NULL);
case BOOT_CF9:
port_cf9_safe = true;
- /* fall through */
+ /* Fall through */
case BOOT_CF9_COND:
if (port_cf9_safe) {
{
/* Stop the cpus and apics */
#ifdef CONFIG_SMP
-
- /* The boot cpu is always logical cpu 0 */
- int reboot_cpu_id = 0;
-
-#ifdef CONFIG_X86_32
- /* See if there has been given a command line override */
- if ((reboot_cpu != -1) && (reboot_cpu < nr_cpu_ids) &&
- cpu_online(reboot_cpu))
- reboot_cpu_id = reboot_cpu;
-#endif
-
- /* Make certain the cpu I'm about to reboot on is online */
- if (!cpu_online(reboot_cpu_id))
- reboot_cpu_id = smp_processor_id();
-
- /* Make certain I only run on the appropriate processor */
- set_cpus_allowed_ptr(current, cpumask_of(reboot_cpu_id));
-
- /* O.K Now that I'm on the appropriate processor,
- * stop all of the others.
+ /*
+ * Stop all of the others. Also disable the local irq to
+ * not receive the per-cpu timer interrupt which may trigger
+ * scheduler's load balance.
*/
- smp_send_stop();
+ local_irq_disable();
+ stop_other_cpus();
#endif
lapic_shutdown();
#endif
#ifdef CONFIG_X86_64
- pci_iommu_shutdown();
+ x86_platform.iommu_shutdown();
#endif
}
static void native_machine_restart(char *__unused)
{
- printk("machine restart\n");
+ pr_notice("machine restart\n");
if (!reboot_force)
machine_shutdown();
static void native_machine_halt(void)
{
- /* stop other cpus and apics */
+ /* Stop other cpus and apics */
machine_shutdown();
- /* stop this cpu */
+ tboot_shutdown(TB_SHUTDOWN_HALT);
+
stop_this_cpu(NULL);
}
machine_shutdown();
pm_power_off();
}
+ /* A fallback in case there is no PM info available */
+ tboot_shutdown(TB_SHUTDOWN_HALT);
}
struct machine_ops machine_ops = {
static atomic_t waiting_for_crash_ipi;
-static int crash_nmi_callback(struct notifier_block *self,
- unsigned long val, void *data)
+static int crash_nmi_callback(unsigned int val, struct pt_regs *regs)
{
int cpu;
- if (val != DIE_NMI_IPI)
- return NOTIFY_OK;
-
cpu = raw_smp_processor_id();
- /* Don't do anything if this handler is invoked on crashing cpu.
+ /*
+ * Don't do anything if this handler is invoked on crashing cpu.
* Otherwise, system will completely hang. Crashing cpu can get
* an NMI if system was initially booted with nmi_watchdog parameter.
*/
if (cpu == crashing_cpu)
- return NOTIFY_STOP;
+ return NMI_HANDLED;
local_irq_disable();
- shootdown_callback(cpu, (struct die_args *)data);
+ shootdown_callback(cpu, regs);
atomic_dec(&waiting_for_crash_ipi);
/* Assume hlt works */
for (;;)
cpu_relax();
- return 1;
+ return NMI_HANDLED;
}
static void smp_send_nmi_allbutself(void)
{
- send_IPI_allbutself(NMI_VECTOR);
+ apic->send_IPI_allbutself(NMI_VECTOR);
}
-static struct notifier_block crash_nmi_nb = {
- .notifier_call = crash_nmi_callback,
-};
-
-/* Halt all other CPUs, calling the specified function on each of them
+/*
+ * Halt all other CPUs, calling the specified function on each of them
*
* This function can be used to halt all other CPUs on crash
* or emergency reboot time. The function passed as parameter
unsigned long msecs;
local_irq_disable();
- /* Make a note of crashing cpu. Will be used in NMI callback.*/
+ /* Make a note of crashing cpu. Will be used in NMI callback. */
crashing_cpu = safe_smp_processor_id();
shootdown_callback = callback;
atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
/* Would it be better to replace the trap vector here? */
- if (register_die_notifier(&crash_nmi_nb))
- return; /* return what? */
- /* Ensure the new callback function is set before sending
+ if (register_nmi_handler(NMI_LOCAL, crash_nmi_callback,
+ NMI_FLAG_FIRST, "crash"))
+ return; /* Return what? */
+ /*
+ * Ensure the new callback function is set before sending
* out the NMI
*/
wmb();
projects / linux-3.10.git / blobdiff