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authorPeter Zijlstra <peterz@infradead.org>2020-05-29 23:27:37 +0200
committerThomas Gleixner <tglx@linutronix.de>2020-06-11 15:15:23 +0200
commitf9912ada82862df341b3e86864cbd532d0d24b84 (patch)
tree4f66fac62be28d505c49dd4b974f7660d4c23c25 /arch/x86/include
parent84b6a3491567a540f955e18d8e615493afa36df0 (diff)
downloadlinux-f9912ada82862df341b3e86864cbd532d0d24b84.tar.gz
x86/entry: Remove debug IDT frobbing
This is all unused now. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20200529213321.245019500@infradead.org
Diffstat (limited to 'arch/x86/include')
-rw-r--r--arch/x86/include/asm/debugreg.h19
-rw-r--r--arch/x86/include/asm/desc.h34
2 files changed, 1 insertions, 52 deletions
diff --git a/arch/x86/include/asm/debugreg.h b/arch/x86/include/asm/debugreg.h
index 3e1c5021d0f8..42fc35d86535 100644
--- a/arch/x86/include/asm/debugreg.h
+++ b/arch/x86/include/asm/debugreg.h
@@ -94,25 +94,6 @@ extern void aout_dump_debugregs(struct user *dump);
extern void hw_breakpoint_restore(void);
-#ifdef CONFIG_X86_64
-DECLARE_PER_CPU(int, debug_stack_usage);
-static inline void debug_stack_usage_inc(void)
-{
- __this_cpu_inc(debug_stack_usage);
-}
-static inline void debug_stack_usage_dec(void)
-{
- __this_cpu_dec(debug_stack_usage);
-}
-void debug_stack_set_zero(void);
-void debug_stack_reset(void);
-#else /* !X86_64 */
-static inline void debug_stack_set_zero(void) { }
-static inline void debug_stack_reset(void) { }
-static inline void debug_stack_usage_inc(void) { }
-static inline void debug_stack_usage_dec(void) { }
-#endif /* X86_64 */
-
static __always_inline unsigned long local_db_save(void)
{
unsigned long dr7;
diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h
index d6c3d346c63a..07632f31147a 100644
--- a/arch/x86/include/asm/desc.h
+++ b/arch/x86/include/asm/desc.h
@@ -42,8 +42,6 @@ static inline void fill_ldt(struct desc_struct *desc, const struct user_desc *in
extern struct desc_ptr idt_descr;
extern gate_desc idt_table[];
-extern const struct desc_ptr debug_idt_descr;
-extern gate_desc debug_idt_table[];
struct gdt_page {
struct desc_struct gdt[GDT_ENTRIES];
@@ -390,31 +388,6 @@ void alloc_intr_gate(unsigned int n, const void *addr);
extern unsigned long system_vectors[];
-#ifdef CONFIG_X86_64
-DECLARE_PER_CPU(u32, debug_idt_ctr);
-static __always_inline bool is_debug_idt_enabled(void)
-{
- if (this_cpu_read(debug_idt_ctr))
- return true;
-
- return false;
-}
-
-static __always_inline void load_debug_idt(void)
-{
- load_idt((const struct desc_ptr *)&debug_idt_descr);
-}
-#else
-static inline bool is_debug_idt_enabled(void)
-{
- return false;
-}
-
-static inline void load_debug_idt(void)
-{
-}
-#endif
-
/*
* 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
@@ -424,10 +397,7 @@ static inline void load_debug_idt(void)
*/
static __always_inline void load_current_idt(void)
{
- if (is_debug_idt_enabled())
- load_debug_idt();
- else
- load_idt((const struct desc_ptr *)&idt_descr);
+ load_idt((const struct desc_ptr *)&idt_descr);
}
extern void idt_setup_early_handler(void);
@@ -438,11 +408,9 @@ extern void idt_setup_apic_and_irq_gates(void);
#ifdef CONFIG_X86_64
extern void idt_setup_early_pf(void);
extern void idt_setup_ist_traps(void);
-extern void idt_setup_debugidt_traps(void);
#else
static inline void idt_setup_early_pf(void) { }
static inline void idt_setup_ist_traps(void) { }
-static inline void idt_setup_debugidt_traps(void) { }
#endif
extern void idt_invalidate(void *addr);