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Diffstat (limited to 'arch/x86/include/asm/desc.h')
-rw-r--r--arch/x86/include/asm/desc.h248
1 files changed, 46 insertions, 202 deletions
diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h
index d0a21b12dd58..1a2ba368da39 100644
--- a/arch/x86/include/asm/desc.h
+++ b/arch/x86/include/asm/desc.h
@@ -5,6 +5,7 @@
#include <asm/ldt.h>
#include <asm/mmu.h>
#include <asm/fixmap.h>
+#include <asm/irq_vectors.h>
#include <linux/smp.h>
#include <linux/percpu.h>
@@ -22,7 +23,7 @@ static inline void fill_ldt(struct desc_struct *desc, const struct user_desc *in
desc->s = 1;
desc->dpl = 0x3;
desc->p = info->seg_not_present ^ 1;
- desc->limit = (info->limit & 0xf0000) >> 16;
+ desc->limit1 = (info->limit & 0xf0000) >> 16;
desc->avl = info->useable;
desc->d = info->seg_32bit;
desc->g = info->limit_in_pages;
@@ -83,33 +84,25 @@ static inline phys_addr_t get_cpu_gdt_paddr(unsigned int cpu)
return per_cpu_ptr_to_phys(get_cpu_gdt_rw(cpu));
}
-#ifdef CONFIG_X86_64
-
static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func,
unsigned dpl, unsigned ist, unsigned seg)
{
- gate->offset_low = PTR_LOW(func);
+ gate->offset_low = (u16) func;
+ gate->bits.p = 1;
+ gate->bits.dpl = dpl;
+ gate->bits.zero = 0;
+ gate->bits.type = type;
+ gate->offset_middle = (u16) (func >> 16);
+#ifdef CONFIG_X86_64
gate->segment = __KERNEL_CS;
- gate->ist = ist;
- gate->p = 1;
- gate->dpl = dpl;
- gate->zero0 = 0;
- gate->zero1 = 0;
- gate->type = type;
- gate->offset_middle = PTR_MIDDLE(func);
- gate->offset_high = PTR_HIGH(func);
-}
-
+ gate->bits.ist = ist;
+ gate->reserved = 0;
+ gate->offset_high = (u32) (func >> 32);
#else
-static inline void pack_gate(gate_desc *gate, unsigned char type,
- unsigned long base, unsigned dpl, unsigned flags,
- unsigned short seg)
-{
- gate->a = (seg << 16) | (base & 0xffff);
- gate->b = (base & 0xffff0000) | (((0x80 | type | (dpl << 5)) & 0xff) << 8);
-}
-
+ gate->segment = seg;
+ gate->bits.ist = 0;
#endif
+}
static inline int desc_empty(const void *ptr)
{
@@ -173,35 +166,22 @@ native_write_gdt_entry(struct desc_struct *gdt, int entry, const void *desc, int
memcpy(&gdt[entry], desc, size);
}
-static inline void pack_descriptor(struct desc_struct *desc, unsigned long base,
- unsigned long limit, unsigned char type,
- unsigned char flags)
-{
- desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
- desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
- (limit & 0x000f0000) | ((type & 0xff) << 8) |
- ((flags & 0xf) << 20);
- desc->p = 1;
-}
-
-
-static inline void set_tssldt_descriptor(void *d, unsigned long addr, unsigned type, unsigned size)
+static inline void set_tssldt_descriptor(void *d, unsigned long addr,
+ unsigned type, unsigned size)
{
-#ifdef CONFIG_X86_64
- struct ldttss_desc64 *desc = d;
+ struct ldttss_desc *desc = d;
memset(desc, 0, sizeof(*desc));
- desc->limit0 = size & 0xFFFF;
- desc->base0 = PTR_LOW(addr);
- desc->base1 = PTR_MIDDLE(addr) & 0xFF;
+ desc->limit0 = (u16) size;
+ desc->base0 = (u16) addr;
+ desc->base1 = (addr >> 16) & 0xFF;
desc->type = type;
desc->p = 1;
desc->limit1 = (size >> 16) & 0xF;
- desc->base2 = (PTR_MIDDLE(addr) >> 8) & 0xFF;
- desc->base3 = PTR_HIGH(addr);
-#else
- pack_descriptor((struct desc_struct *)d, addr, size, 0x80 | type, 0);
+ desc->base2 = (addr >> 24) & 0xFF;
+#ifdef CONFIG_X86_64
+ desc->base3 = (u32) (addr >> 32);
#endif
}
@@ -401,147 +381,20 @@ static inline void set_desc_base(struct desc_struct *desc, unsigned long base)
static inline unsigned long get_desc_limit(const struct desc_struct *desc)
{
- return desc->limit0 | (desc->limit << 16);
+ return desc->limit0 | (desc->limit1 << 16);
}
static inline void set_desc_limit(struct desc_struct *desc, unsigned long limit)
{
desc->limit0 = limit & 0xffff;
- desc->limit = (limit >> 16) & 0xf;
-}
-
-#ifdef CONFIG_X86_64
-static inline void set_nmi_gate(int gate, void *addr)
-{
- gate_desc s;
-
- pack_gate(&s, GATE_INTERRUPT, (unsigned long)addr, 0, 0, __KERNEL_CS);
- write_idt_entry(debug_idt_table, gate, &s);
+ desc->limit1 = (limit >> 16) & 0xf;
}
-#endif
-#ifdef CONFIG_TRACING
-extern struct desc_ptr trace_idt_descr;
-extern gate_desc trace_idt_table[];
-static inline void write_trace_idt_entry(int entry, const gate_desc *gate)
-{
- write_idt_entry(trace_idt_table, entry, gate);
-}
+void update_intr_gate(unsigned int n, const void *addr);
+void alloc_intr_gate(unsigned int n, const void *addr);
-static inline void _trace_set_gate(int gate, unsigned type, void *addr,
- unsigned dpl, unsigned ist, unsigned seg)
-{
- gate_desc s;
-
- pack_gate(&s, type, (unsigned long)addr, dpl, ist, seg);
- /*
- * does not need to be atomic because it is only done once at
- * setup time
- */
- write_trace_idt_entry(gate, &s);
-}
-#else
-static inline void write_trace_idt_entry(int entry, const gate_desc *gate)
-{
-}
-
-#define _trace_set_gate(gate, type, addr, dpl, ist, seg)
-#endif
-
-static inline void _set_gate(int gate, unsigned type, void *addr,
- unsigned dpl, unsigned ist, unsigned seg)
-{
- gate_desc s;
-
- pack_gate(&s, type, (unsigned long)addr, dpl, ist, seg);
- /*
- * does not need to be atomic because it is only done once at
- * setup time
- */
- write_idt_entry(idt_table, gate, &s);
- write_trace_idt_entry(gate, &s);
-}
-
-/*
- * This needs to use 'idt_table' rather than 'idt', and
- * thus use the _nonmapped_ version of the IDT, as the
- * Pentium F0 0F bugfix can have resulted in the mapped
- * IDT being write-protected.
- */
-#define set_intr_gate_notrace(n, addr) \
- do { \
- BUG_ON((unsigned)n > 0xFF); \
- _set_gate(n, GATE_INTERRUPT, (void *)addr, 0, 0, \
- __KERNEL_CS); \
- } while (0)
-
-#define set_intr_gate(n, addr) \
- do { \
- set_intr_gate_notrace(n, addr); \
- _trace_set_gate(n, GATE_INTERRUPT, (void *)trace_##addr,\
- 0, 0, __KERNEL_CS); \
- } while (0)
-
-extern int first_system_vector;
-/* used_vectors is BITMAP for irq is not managed by percpu vector_irq */
extern unsigned long used_vectors[];
-static inline void alloc_system_vector(int vector)
-{
- if (!test_bit(vector, used_vectors)) {
- set_bit(vector, used_vectors);
- if (first_system_vector > vector)
- first_system_vector = vector;
- } else {
- BUG();
- }
-}
-
-#define alloc_intr_gate(n, addr) \
- do { \
- alloc_system_vector(n); \
- set_intr_gate(n, addr); \
- } while (0)
-
-/*
- * This routine sets up an interrupt gate at directory privilege level 3.
- */
-static inline void set_system_intr_gate(unsigned int n, void *addr)
-{
- BUG_ON((unsigned)n > 0xFF);
- _set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
-}
-
-static inline void set_system_trap_gate(unsigned int n, void *addr)
-{
- BUG_ON((unsigned)n > 0xFF);
- _set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
-}
-
-static inline void set_trap_gate(unsigned int n, void *addr)
-{
- BUG_ON((unsigned)n > 0xFF);
- _set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
-}
-
-static inline void set_task_gate(unsigned int n, unsigned int gdt_entry)
-{
- BUG_ON((unsigned)n > 0xFF);
- _set_gate(n, GATE_TASK, (void *)0, 0, 0, (gdt_entry<<3));
-}
-
-static inline void set_intr_gate_ist(int n, void *addr, unsigned ist)
-{
- BUG_ON((unsigned)n > 0xFF);
- _set_gate(n, GATE_INTERRUPT, addr, 0, ist, __KERNEL_CS);
-}
-
-static inline void set_system_intr_gate_ist(int n, void *addr, unsigned ist)
-{
- BUG_ON((unsigned)n > 0xFF);
- _set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS);
-}
-
#ifdef CONFIG_X86_64
DECLARE_PER_CPU(u32, debug_idt_ctr);
static inline bool is_debug_idt_enabled(void)
@@ -567,31 +420,6 @@ static inline void load_debug_idt(void)
}
#endif
-#ifdef CONFIG_TRACING
-extern atomic_t trace_idt_ctr;
-static inline bool is_trace_idt_enabled(void)
-{
- if (atomic_read(&trace_idt_ctr))
- return true;
-
- return false;
-}
-
-static inline void load_trace_idt(void)
-{
- load_idt((const struct desc_ptr *)&trace_idt_descr);
-}
-#else
-static inline bool is_trace_idt_enabled(void)
-{
- return false;
-}
-
-static inline void load_trace_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
@@ -603,9 +431,25 @@ static inline void load_current_idt(void)
{
if (is_debug_idt_enabled())
load_debug_idt();
- else if (is_trace_idt_enabled())
- load_trace_idt();
else
load_idt((const struct desc_ptr *)&idt_descr);
}
+
+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);
+
+#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);
+
#endif /* _ASM_X86_DESC_H */