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author | Thomas Gleixner <tglx@linutronix.de> | 2017-08-28 08:47:42 +0200 |
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committer | Ingo Molnar <mingo@kernel.org> | 2017-08-29 12:07:25 +0200 |
commit | 87cc037674342cbf6213829b2cc59bb71be60777 (patch) | |
tree | e66f2e790f39b9c87d7b18c10d93a8e3b3a6d81f /arch/x86/include/asm/desc.h | |
parent | 38e9e81f4c81c75799b002d5811de7241b307676 (diff) | |
download | linux-stable-87cc037674342cbf6213829b2cc59bb71be60777.tar.gz linux-stable-87cc037674342cbf6213829b2cc59bb71be60777.tar.bz2 linux-stable-87cc037674342cbf6213829b2cc59bb71be60777.zip |
x86/ldttss: Clean up 32-bit descriptors
Like the IDT descriptors, the LDT/TSS descriptors are pointlessly different
on 32 and 64 bit kernels.
Unify them and get rid of the duplicated code.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20170828064958.289634692@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/desc.h')
-rw-r--r-- | arch/x86/include/asm/desc.h | 26 |
1 files changed, 3 insertions, 23 deletions
diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h index 2090cd223505..108a9e894019 100644 --- a/arch/x86/include/asm/desc.h +++ b/arch/x86/include/asm/desc.h @@ -166,42 +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->limit0 = (u16) limit; - desc->base0 = (u16) base; - desc->base1 = (base >> 16) & 0xFF; - desc->type = type & 0x0F; - desc->s = 0; - desc->dpl = 0; - desc->p = 1; - desc->limit1 = (limit >> 16) & 0xF; - desc->avl = (flags >> 0) & 0x01; - desc->l = (flags >> 1) & 0x01; - desc->d = (flags >> 2) & 0x01; - desc->g = (flags >> 3) & 0x01; -} - 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->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 = (addr >> 24) & 0xFF; +#ifdef CONFIG_X86_64 desc->base3 = (u32) (addr >> 32); -#else - pack_descriptor((struct desc_struct *)d, addr, size, type, 0); #endif } |