diff options
| -rw-r--r-- | include/asm-x86/desc.h | 58 |
1 files changed, 18 insertions, 40 deletions
diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h index c31715cf2218..e9356a852020 100644 --- a/include/asm-x86/desc.h +++ b/include/asm-x86/desc.h @@ -125,21 +125,6 @@ static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry, memcpy(&gdt[entry], desc, size); } -static inline void set_tssldt_descriptor(struct ldttss_desc64 *d, - unsigned long tss, unsigned type, - unsigned size) -{ - memset(d, 0, sizeof(*d)); - d->limit0 = size & 0xFFFF; - d->base0 = PTR_LOW(tss); - d->base1 = PTR_MIDDLE(tss) & 0xFF; - d->type = type; - d->p = 1; - d->limit1 = (size >> 16) & 0xF; - d->base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF; - d->base3 = PTR_HIGH(tss); -} - static inline void pack_descriptor(struct desc_struct *desc, unsigned long base, unsigned long limit, unsigned char type, unsigned char flags) @@ -151,30 +136,24 @@ static inline void pack_descriptor(struct desc_struct *desc, unsigned long base, desc->p = 1; } -static inline void pack_ldt(ldt_desc *ldt, unsigned long addr, - unsigned size) -{ -#ifdef CONFIG_X86_64 - set_tssldt_descriptor(ldt, - addr, DESC_LDT, size); -#else - pack_descriptor(ldt, (unsigned long)addr, - size, - 0x80 | DESC_LDT, 0); -#endif -} - -static inline void pack_tss(tss_desc *tss, unsigned long addr, - unsigned size, unsigned entry) +static inline void set_tssldt_descriptor(void *d, unsigned long addr, + unsigned type, unsigned size) { #ifdef CONFIG_X86_64 - set_tssldt_descriptor(tss, - addr, entry, size); + struct ldttss_desc64 *desc = d; + memset(desc, 0, sizeof(*desc)); + desc->limit0 = size & 0xFFFF; + desc->base0 = PTR_LOW(addr); + desc->base1 = PTR_MIDDLE(addr) & 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(tss, (unsigned long)addr, - size, - 0x80 | entry, 0); + + pack_descriptor((struct desc_struct *)d, addr, size, 0x80 | type, 0); #endif } @@ -190,9 +169,8 @@ static inline void __set_tss_desc(unsigned cpu, unsigned int entry, void *addr) * -1? seg base+limit should be pointing to the address of the * last valid byte */ - pack_tss(&tss, (unsigned long)addr, - IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1, - DESC_TSS); + set_tssldt_descriptor(&tss, (unsigned long)addr, DESC_TSS, + IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1); write_gdt_entry(d, entry, &tss, DESC_TSS); } @@ -206,8 +184,8 @@ static inline void native_set_ldt(const void *addr, unsigned int entries) unsigned cpu = smp_processor_id(); ldt_desc ldt; - pack_ldt(&ldt, (unsigned long)addr, - entries * sizeof(ldt) - 1); + set_tssldt_descriptor(&ldt, (unsigned long)addr, + DESC_LDT, entries * sizeof(ldt) - 1); write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, &ldt, DESC_LDT); __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8)); |