diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2020-05-28 16:53:20 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-06-11 15:15:26 +0200 |
| commit | 3e77abda65b1cec10ef6b18b1ccfee0beaf400f1 (patch) | |
| tree | 6bc8e8b203695a35c7a68488c7641280664151f0 /arch/x86/include | |
| parent | 00229a54300108502f68c8777faca2d13f805f1a (diff) | |
x86/idt: Consolidate idt functionality
- Move load_current_idt() out of line and replace the hideous comment with
a lockdep assert. This allows to make idt_table and idt_descr static.
- Mark idt_table read only after the IDT initialization is complete.
- Shuffle code around to consolidate the #ifdef sections into one.
- Adapt the F00F bug code.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200528145523.084915381@linutronix.de
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/desc.h | 17 |
1 files changed, 2 insertions, 15 deletions
diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h index 07632f31147a..1ced11d31932 100644 --- a/arch/x86/include/asm/desc.h +++ b/arch/x86/include/asm/desc.h @@ -40,9 +40,6 @@ static inline void fill_ldt(struct desc_struct *desc, const struct user_desc *in desc->l = 0; } -extern struct desc_ptr idt_descr; -extern gate_desc idt_table[]; - struct gdt_page { struct desc_struct gdt[GDT_ENTRIES]; } __attribute__((aligned(PAGE_SIZE))); @@ -388,22 +385,12 @@ void alloc_intr_gate(unsigned int n, const void *addr); extern unsigned long system_vectors[]; -/* - * The load_current_idt() must be called with interrupts disabled - * to avoid races. That way the IDT will always be set back to the expected - * descriptor. It's also called when a CPU is being initialized, and - * that doesn't need to disable interrupts, as nothing should be - * bothering the CPU then. - */ -static __always_inline void load_current_idt(void) -{ - load_idt((const struct desc_ptr *)&idt_descr); -} - +extern void load_current_idt(void); extern void idt_setup_early_handler(void); extern void idt_setup_early_traps(void); extern void idt_setup_traps(void); extern void idt_setup_apic_and_irq_gates(void); +extern bool idt_is_f00f_address(unsigned long address); #ifdef CONFIG_X86_64 extern void idt_setup_early_pf(void); |