Commit-ID: 16bc18d895cee95f12bd722e5a3016676dfcf084 Gitweb: http://git.kernel.org/tip/16bc18d895cee95f12bd722e5a3016676dfcf084 Author: Thomas Gleixner <[email protected]> AuthorDate: Mon, 28 Aug 2017 08:47:44 +0200 Committer: Ingo Molnar <[email protected]> CommitDate: Tue, 29 Aug 2017 12:07:26 +0200
x86/idt: Move 32-bit idt_descr to C code 32-bit kernels have the idt_descr defined in the low level assembly entry code, but there is no good reason for that. Move it into the C file and use the 64-bit version of it. Signed-off-by: Thomas Gleixner <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Steven Rostedt <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- arch/x86/kernel/head_32.S | 6 ------ arch/x86/kernel/idt.c | 10 +++++----- 2 files changed, 5 insertions(+), 11 deletions(-) diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S index 29da959..ce8c6ed 100644 --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S @@ -622,7 +622,6 @@ int_msg: .data .globl boot_gdt_descr -.globl idt_descr ALIGN # early boot GDT descriptor (must use 1:1 address mapping) @@ -631,11 +630,6 @@ boot_gdt_descr: .word __BOOT_DS+7 .long boot_gdt - __PAGE_OFFSET - .word 0 # 32-bit align idt_desc.address -idt_descr: - .word IDT_ENTRIES*8-1 # idt contains 256 entries - .long idt_table - # boot GDT descriptor (later on used by CPU#0): .word 0 # 32 bit align gdt_desc.address ENTRY(early_gdt_descr) diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c index 3d19cad..86e5912 100644 --- a/arch/x86/kernel/idt.c +++ b/arch/x86/kernel/idt.c @@ -10,15 +10,15 @@ /* Must be page-aligned because the real IDT is used in a fixmap. */ gate_desc idt_table[IDT_ENTRIES] __page_aligned_bss; -#ifdef CONFIG_X86_64 -/* No need to be aligned, but done to keep all IDTs defined the same way. */ -gate_desc debug_idt_table[IDT_ENTRIES] __page_aligned_bss; - struct desc_ptr idt_descr __ro_after_init = { - .size = IDT_ENTRIES * 16 - 1, + .size = (IDT_ENTRIES * 2 * sizeof(unsigned long)) - 1, .address = (unsigned long) idt_table, }; +#ifdef CONFIG_X86_64 +/* No need to be aligned, but done to keep all IDTs defined the same way. */ +gate_desc debug_idt_table[IDT_ENTRIES] __page_aligned_bss; + const struct desc_ptr debug_idt_descr = { .size = IDT_ENTRIES * 16 - 1, .address = (unsigned long) debug_idt_table,
