x86: merge setup64.c into common_64.c
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu
Ingo Molnar
parent
a9c1182fbd
commit
0f0124fa74
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@ -22,7 +22,7 @@ obj-y += setup_$(BITS).o i8259.o irqinit_$(BITS).o setup.o
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obj-$(CONFIG_X86_32) += probe_roms_32.o
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obj-$(CONFIG_X86_32) += sys_i386_32.o i386_ksyms_32.o
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obj-$(CONFIG_X86_64) += sys_x86_64.o x8664_ksyms_64.o
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obj-$(CONFIG_X86_64) += syscall_64.o vsyscall_64.o setup64.o
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obj-$(CONFIG_X86_64) += syscall_64.o vsyscall_64.o
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obj-y += bootflag.o e820.o
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obj-y += pci-dma.o quirks.o i8237.o topology.o kdebugfs.o
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obj-y += alternative.o i8253.o pci-nommu.o
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@ -1,10 +1,17 @@
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/string.h>
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#include <linux/bootmem.h>
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#include <linux/bitops.h>
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#include <linux/module.h>
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#include <linux/kgdb.h>
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#include <linux/topology.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <linux/smp.h>
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#include <linux/module.h>
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#include <linux/percpu.h>
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#include <linux/bootmem.h>
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#include <asm/processor.h>
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#include <asm/i387.h>
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#include <asm/msr.h>
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@ -19,6 +26,15 @@
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#include <asm/apic.h>
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#include <mach_apic.h>
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#endif
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#include <asm/pda.h>
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#include <asm/pgtable.h>
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#include <asm/processor.h>
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#include <asm/desc.h>
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#include <asm/atomic.h>
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#include <asm/proto.h>
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#include <asm/sections.h>
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#include <asm/setup.h>
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#include <asm/genapic.h>
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#include "cpu.h"
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@ -404,3 +420,262 @@ static __init int setup_disablecpuid(char *arg)
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return 1;
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}
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__setup("clearcpuid=", setup_disablecpuid);
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#ifndef CONFIG_DEBUG_BOOT_PARAMS
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struct boot_params __initdata boot_params;
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#else
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struct boot_params boot_params;
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#endif
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cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
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struct x8664_pda **_cpu_pda __read_mostly;
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EXPORT_SYMBOL(_cpu_pda);
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struct desc_ptr idt_descr = { 256 * 16 - 1, (unsigned long) idt_table };
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char boot_cpu_stack[IRQSTACKSIZE] __page_aligned_bss;
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unsigned long __supported_pte_mask __read_mostly = ~0UL;
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EXPORT_SYMBOL_GPL(__supported_pte_mask);
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static int do_not_nx __cpuinitdata;
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/* noexec=on|off
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Control non executable mappings for 64bit processes.
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on Enable(default)
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off Disable
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*/
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static int __init nonx_setup(char *str)
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{
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if (!str)
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return -EINVAL;
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if (!strncmp(str, "on", 2)) {
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__supported_pte_mask |= _PAGE_NX;
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do_not_nx = 0;
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} else if (!strncmp(str, "off", 3)) {
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do_not_nx = 1;
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__supported_pte_mask &= ~_PAGE_NX;
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}
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return 0;
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}
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early_param("noexec", nonx_setup);
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int force_personality32;
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/* noexec32=on|off
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Control non executable heap for 32bit processes.
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To control the stack too use noexec=off
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on PROT_READ does not imply PROT_EXEC for 32bit processes (default)
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off PROT_READ implies PROT_EXEC
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*/
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static int __init nonx32_setup(char *str)
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{
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if (!strcmp(str, "on"))
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force_personality32 &= ~READ_IMPLIES_EXEC;
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else if (!strcmp(str, "off"))
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force_personality32 |= READ_IMPLIES_EXEC;
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return 1;
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}
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__setup("noexec32=", nonx32_setup);
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void pda_init(int cpu)
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{
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struct x8664_pda *pda = cpu_pda(cpu);
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/* Setup up data that may be needed in __get_free_pages early */
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asm volatile("movl %0,%%fs ; movl %0,%%gs" :: "r" (0));
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/* Memory clobbers used to order PDA accessed */
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mb();
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wrmsrl(MSR_GS_BASE, pda);
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mb();
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pda->cpunumber = cpu;
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pda->irqcount = -1;
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pda->kernelstack = (unsigned long)stack_thread_info() -
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PDA_STACKOFFSET + THREAD_SIZE;
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pda->active_mm = &init_mm;
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pda->mmu_state = 0;
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if (cpu == 0) {
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/* others are initialized in smpboot.c */
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pda->pcurrent = &init_task;
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pda->irqstackptr = boot_cpu_stack;
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} else {
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pda->irqstackptr = (char *)
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__get_free_pages(GFP_ATOMIC, IRQSTACK_ORDER);
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if (!pda->irqstackptr)
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panic("cannot allocate irqstack for cpu %d", cpu);
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if (pda->nodenumber == 0 && cpu_to_node(cpu) != NUMA_NO_NODE)
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pda->nodenumber = cpu_to_node(cpu);
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}
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pda->irqstackptr += IRQSTACKSIZE-64;
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}
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char boot_exception_stacks[(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ +
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DEBUG_STKSZ]
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__attribute__((section(".bss.page_aligned")));
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extern asmlinkage void ignore_sysret(void);
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/* May not be marked __init: used by software suspend */
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void syscall_init(void)
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{
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/*
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* LSTAR and STAR live in a bit strange symbiosis.
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* They both write to the same internal register. STAR allows to
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* set CS/DS but only a 32bit target. LSTAR sets the 64bit rip.
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*/
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wrmsrl(MSR_STAR, ((u64)__USER32_CS)<<48 | ((u64)__KERNEL_CS)<<32);
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wrmsrl(MSR_LSTAR, system_call);
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wrmsrl(MSR_CSTAR, ignore_sysret);
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#ifdef CONFIG_IA32_EMULATION
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syscall32_cpu_init();
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#endif
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/* Flags to clear on syscall */
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wrmsrl(MSR_SYSCALL_MASK,
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X86_EFLAGS_TF|X86_EFLAGS_DF|X86_EFLAGS_IF|X86_EFLAGS_IOPL);
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}
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void __cpuinit check_efer(void)
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{
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unsigned long efer;
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rdmsrl(MSR_EFER, efer);
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if (!(efer & EFER_NX) || do_not_nx)
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__supported_pte_mask &= ~_PAGE_NX;
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}
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unsigned long kernel_eflags;
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/*
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* Copies of the original ist values from the tss are only accessed during
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* debugging, no special alignment required.
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*/
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DEFINE_PER_CPU(struct orig_ist, orig_ist);
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/*
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* cpu_init() initializes state that is per-CPU. Some data is already
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* initialized (naturally) in the bootstrap process, such as the GDT
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* and IDT. We reload them nevertheless, this function acts as a
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* 'CPU state barrier', nothing should get across.
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* A lot of state is already set up in PDA init.
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*/
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void __cpuinit cpu_init(void)
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{
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int cpu = stack_smp_processor_id();
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struct tss_struct *t = &per_cpu(init_tss, cpu);
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struct orig_ist *orig_ist = &per_cpu(orig_ist, cpu);
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unsigned long v;
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char *estacks = NULL;
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struct task_struct *me;
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int i;
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/* CPU 0 is initialised in head64.c */
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if (cpu != 0)
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pda_init(cpu);
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else
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estacks = boot_exception_stacks;
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me = current;
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if (cpu_test_and_set(cpu, cpu_initialized))
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panic("CPU#%d already initialized!\n", cpu);
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printk(KERN_INFO "Initializing CPU#%d\n", cpu);
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clear_in_cr4(X86_CR4_VME|X86_CR4_PVI|X86_CR4_TSD|X86_CR4_DE);
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/*
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* Initialize the per-CPU GDT with the boot GDT,
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* and set up the GDT descriptor:
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*/
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switch_to_new_gdt();
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load_idt((const struct desc_ptr *)&idt_descr);
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memset(me->thread.tls_array, 0, GDT_ENTRY_TLS_ENTRIES * 8);
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syscall_init();
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wrmsrl(MSR_FS_BASE, 0);
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wrmsrl(MSR_KERNEL_GS_BASE, 0);
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barrier();
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check_efer();
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/*
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* set up and load the per-CPU TSS
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*/
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for (v = 0; v < N_EXCEPTION_STACKS; v++) {
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static const unsigned int order[N_EXCEPTION_STACKS] = {
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[0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STACK_ORDER,
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[DEBUG_STACK - 1] = DEBUG_STACK_ORDER
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};
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if (cpu) {
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estacks = (char *)__get_free_pages(GFP_ATOMIC, order[v]);
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if (!estacks)
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panic("Cannot allocate exception stack %ld %d\n",
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v, cpu);
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}
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estacks += PAGE_SIZE << order[v];
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orig_ist->ist[v] = t->x86_tss.ist[v] = (unsigned long)estacks;
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}
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t->x86_tss.io_bitmap_base = offsetof(struct tss_struct, io_bitmap);
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/*
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* <= is required because the CPU will access up to
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* 8 bits beyond the end of the IO permission bitmap.
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*/
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for (i = 0; i <= IO_BITMAP_LONGS; i++)
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t->io_bitmap[i] = ~0UL;
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atomic_inc(&init_mm.mm_count);
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me->active_mm = &init_mm;
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if (me->mm)
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BUG();
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enter_lazy_tlb(&init_mm, me);
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load_sp0(t, ¤t->thread);
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set_tss_desc(cpu, t);
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load_TR_desc();
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load_LDT(&init_mm.context);
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#ifdef CONFIG_KGDB
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/*
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* If the kgdb is connected no debug regs should be altered. This
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* is only applicable when KGDB and a KGDB I/O module are built
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* into the kernel and you are using early debugging with
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* kgdbwait. KGDB will control the kernel HW breakpoint registers.
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*/
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if (kgdb_connected && arch_kgdb_ops.correct_hw_break)
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arch_kgdb_ops.correct_hw_break();
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else {
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#endif
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/*
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* Clear all 6 debug registers:
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*/
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set_debugreg(0UL, 0);
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set_debugreg(0UL, 1);
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set_debugreg(0UL, 2);
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set_debugreg(0UL, 3);
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set_debugreg(0UL, 6);
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set_debugreg(0UL, 7);
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#ifdef CONFIG_KGDB
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/* If the kgdb is connected no debug regs should be altered. */
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}
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#endif
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fpu_init();
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raw_local_save_flags(kernel_eflags);
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if (is_uv_system())
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uv_cpu_init();
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}
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@ -1,287 +0,0 @@
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/*
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* X86-64 specific CPU setup.
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* Copyright (C) 1995 Linus Torvalds
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* Copyright 2001, 2002, 2003 SuSE Labs / Andi Kleen.
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* See setup.c for older changelog.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/string.h>
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#include <linux/bootmem.h>
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#include <linux/bitops.h>
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#include <linux/module.h>
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#include <linux/kgdb.h>
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#include <linux/topology.h>
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#include <asm/pda.h>
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#include <asm/pgtable.h>
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#include <asm/processor.h>
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#include <asm/desc.h>
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#include <asm/atomic.h>
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#include <asm/mmu_context.h>
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#include <asm/smp.h>
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#include <asm/i387.h>
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#include <asm/percpu.h>
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#include <asm/proto.h>
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#include <asm/sections.h>
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#include <asm/setup.h>
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#include <asm/genapic.h>
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#ifndef CONFIG_DEBUG_BOOT_PARAMS
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struct boot_params __initdata boot_params;
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#else
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struct boot_params boot_params;
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#endif
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cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
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struct x8664_pda **_cpu_pda __read_mostly;
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EXPORT_SYMBOL(_cpu_pda);
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struct desc_ptr idt_descr = { 256 * 16 - 1, (unsigned long) idt_table };
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char boot_cpu_stack[IRQSTACKSIZE] __page_aligned_bss;
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unsigned long __supported_pte_mask __read_mostly = ~0UL;
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EXPORT_SYMBOL_GPL(__supported_pte_mask);
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static int do_not_nx __cpuinitdata = 0;
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/* noexec=on|off
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Control non executable mappings for 64bit processes.
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on Enable(default)
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off Disable
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*/
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static int __init nonx_setup(char *str)
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{
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if (!str)
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return -EINVAL;
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if (!strncmp(str, "on", 2)) {
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__supported_pte_mask |= _PAGE_NX;
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do_not_nx = 0;
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} else if (!strncmp(str, "off", 3)) {
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do_not_nx = 1;
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__supported_pte_mask &= ~_PAGE_NX;
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}
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return 0;
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}
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early_param("noexec", nonx_setup);
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int force_personality32 = 0;
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/* noexec32=on|off
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Control non executable heap for 32bit processes.
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To control the stack too use noexec=off
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on PROT_READ does not imply PROT_EXEC for 32bit processes (default)
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off PROT_READ implies PROT_EXEC
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*/
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static int __init nonx32_setup(char *str)
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{
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if (!strcmp(str, "on"))
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force_personality32 &= ~READ_IMPLIES_EXEC;
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else if (!strcmp(str, "off"))
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force_personality32 |= READ_IMPLIES_EXEC;
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return 1;
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}
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__setup("noexec32=", nonx32_setup);
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void pda_init(int cpu)
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{
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struct x8664_pda *pda = cpu_pda(cpu);
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/* Setup up data that may be needed in __get_free_pages early */
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asm volatile("movl %0,%%fs ; movl %0,%%gs" :: "r" (0));
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/* Memory clobbers used to order PDA accessed */
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mb();
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wrmsrl(MSR_GS_BASE, pda);
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mb();
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pda->cpunumber = cpu;
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pda->irqcount = -1;
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pda->kernelstack =
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(unsigned long)stack_thread_info() - PDA_STACKOFFSET + THREAD_SIZE;
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pda->active_mm = &init_mm;
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pda->mmu_state = 0;
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if (cpu == 0) {
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/* others are initialized in smpboot.c */
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pda->pcurrent = &init_task;
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pda->irqstackptr = boot_cpu_stack;
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} else {
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pda->irqstackptr = (char *)
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__get_free_pages(GFP_ATOMIC, IRQSTACK_ORDER);
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if (!pda->irqstackptr)
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panic("cannot allocate irqstack for cpu %d", cpu);
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if (pda->nodenumber == 0 && cpu_to_node(cpu) != NUMA_NO_NODE)
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pda->nodenumber = cpu_to_node(cpu);
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}
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pda->irqstackptr += IRQSTACKSIZE-64;
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}
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char boot_exception_stacks[(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ + DEBUG_STKSZ]
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__attribute__((section(".bss.page_aligned")));
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extern asmlinkage void ignore_sysret(void);
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/* May not be marked __init: used by software suspend */
|
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void syscall_init(void)
|
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{
|
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/*
|
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* LSTAR and STAR live in a bit strange symbiosis.
|
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* They both write to the same internal register. STAR allows to set CS/DS
|
||||
* but only a 32bit target. LSTAR sets the 64bit rip.
|
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*/
|
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wrmsrl(MSR_STAR, ((u64)__USER32_CS)<<48 | ((u64)__KERNEL_CS)<<32);
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wrmsrl(MSR_LSTAR, system_call);
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wrmsrl(MSR_CSTAR, ignore_sysret);
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#ifdef CONFIG_IA32_EMULATION
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syscall32_cpu_init ();
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#endif
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/* Flags to clear on syscall */
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wrmsrl(MSR_SYSCALL_MASK,
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X86_EFLAGS_TF|X86_EFLAGS_DF|X86_EFLAGS_IF|X86_EFLAGS_IOPL);
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}
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|
||||
void __cpuinit check_efer(void)
|
||||
{
|
||||
unsigned long efer;
|
||||
|
||||
rdmsrl(MSR_EFER, efer);
|
||||
if (!(efer & EFER_NX) || do_not_nx) {
|
||||
__supported_pte_mask &= ~_PAGE_NX;
|
||||
}
|
||||
}
|
||||
|
||||
unsigned long kernel_eflags;
|
||||
|
||||
/*
|
||||
* Copies of the original ist values from the tss are only accessed during
|
||||
* debugging, no special alignment required.
|
||||
*/
|
||||
DEFINE_PER_CPU(struct orig_ist, orig_ist);
|
||||
|
||||
/*
|
||||
* cpu_init() initializes state that is per-CPU. Some data is already
|
||||
* initialized (naturally) in the bootstrap process, such as the GDT
|
||||
* and IDT. We reload them nevertheless, this function acts as a
|
||||
* 'CPU state barrier', nothing should get across.
|
||||
* A lot of state is already set up in PDA init.
|
||||
*/
|
||||
void __cpuinit cpu_init (void)
|
||||
{
|
||||
int cpu = stack_smp_processor_id();
|
||||
struct tss_struct *t = &per_cpu(init_tss, cpu);
|
||||
struct orig_ist *orig_ist = &per_cpu(orig_ist, cpu);
|
||||
unsigned long v;
|
||||
char *estacks = NULL;
|
||||
struct task_struct *me;
|
||||
int i;
|
||||
|
||||
/* CPU 0 is initialised in head64.c */
|
||||
if (cpu != 0) {
|
||||
pda_init(cpu);
|
||||
} else
|
||||
estacks = boot_exception_stacks;
|
||||
|
||||
me = current;
|
||||
|
||||
if (cpu_test_and_set(cpu, cpu_initialized))
|
||||
panic("CPU#%d already initialized!\n", cpu);
|
||||
|
||||
printk("Initializing CPU#%d\n", cpu);
|
||||
|
||||
clear_in_cr4(X86_CR4_VME|X86_CR4_PVI|X86_CR4_TSD|X86_CR4_DE);
|
||||
|
||||
/*
|
||||
* Initialize the per-CPU GDT with the boot GDT,
|
||||
* and set up the GDT descriptor:
|
||||
*/
|
||||
|
||||
switch_to_new_gdt();
|
||||
load_idt((const struct desc_ptr *)&idt_descr);
|
||||
|
||||
memset(me->thread.tls_array, 0, GDT_ENTRY_TLS_ENTRIES * 8);
|
||||
syscall_init();
|
||||
|
||||
wrmsrl(MSR_FS_BASE, 0);
|
||||
wrmsrl(MSR_KERNEL_GS_BASE, 0);
|
||||
barrier();
|
||||
|
||||
check_efer();
|
||||
|
||||
/*
|
||||
* set up and load the per-CPU TSS
|
||||
*/
|
||||
for (v = 0; v < N_EXCEPTION_STACKS; v++) {
|
||||
static const unsigned int order[N_EXCEPTION_STACKS] = {
|
||||
[0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STACK_ORDER,
|
||||
[DEBUG_STACK - 1] = DEBUG_STACK_ORDER
|
||||
};
|
||||
if (cpu) {
|
||||
estacks = (char *)__get_free_pages(GFP_ATOMIC, order[v]);
|
||||
if (!estacks)
|
||||
panic("Cannot allocate exception stack %ld %d\n",
|
||||
v, cpu);
|
||||
}
|
||||
estacks += PAGE_SIZE << order[v];
|
||||
orig_ist->ist[v] = t->x86_tss.ist[v] = (unsigned long)estacks;
|
||||
}
|
||||
|
||||
t->x86_tss.io_bitmap_base = offsetof(struct tss_struct, io_bitmap);
|
||||
/*
|
||||
* <= is required because the CPU will access up to
|
||||
* 8 bits beyond the end of the IO permission bitmap.
|
||||
*/
|
||||
for (i = 0; i <= IO_BITMAP_LONGS; i++)
|
||||
t->io_bitmap[i] = ~0UL;
|
||||
|
||||
atomic_inc(&init_mm.mm_count);
|
||||
me->active_mm = &init_mm;
|
||||
if (me->mm)
|
||||
BUG();
|
||||
enter_lazy_tlb(&init_mm, me);
|
||||
|
||||
load_sp0(t, ¤t->thread);
|
||||
set_tss_desc(cpu, t);
|
||||
load_TR_desc();
|
||||
load_LDT(&init_mm.context);
|
||||
|
||||
#ifdef CONFIG_KGDB
|
||||
/*
|
||||
* If the kgdb is connected no debug regs should be altered. This
|
||||
* is only applicable when KGDB and a KGDB I/O module are built
|
||||
* into the kernel and you are using early debugging with
|
||||
* kgdbwait. KGDB will control the kernel HW breakpoint registers.
|
||||
*/
|
||||
if (kgdb_connected && arch_kgdb_ops.correct_hw_break)
|
||||
arch_kgdb_ops.correct_hw_break();
|
||||
else {
|
||||
#endif
|
||||
/*
|
||||
* Clear all 6 debug registers:
|
||||
*/
|
||||
|
||||
set_debugreg(0UL, 0);
|
||||
set_debugreg(0UL, 1);
|
||||
set_debugreg(0UL, 2);
|
||||
set_debugreg(0UL, 3);
|
||||
set_debugreg(0UL, 6);
|
||||
set_debugreg(0UL, 7);
|
||||
#ifdef CONFIG_KGDB
|
||||
/* If the kgdb is connected no debug regs should be altered. */
|
||||
}
|
||||
#endif
|
||||
|
||||
fpu_init();
|
||||
|
||||
raw_local_save_flags(kernel_eflags);
|
||||
|
||||
if (is_uv_system())
|
||||
uv_cpu_init();
|
||||
}
|
||||
Loading…
Reference in New Issue