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| author | Thomas Gleixner <tglx@linutronix.de> | 2017-08-28 08:47:46 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-08-29 12:07:26 +0200 |
| commit | e802a51ede91350438c051da2f238f5e8c918ead (patch) | |
| tree | c8ee5daacc00a9181961476d72e0387229fb2295 /arch/x86/kernel/idt.c | |
| parent | 8f55868f9e42fea56021b17421914b9e4fda4960 (diff) | |
| download | linux-e802a51ede91350438c051da2f238f5e8c918ead.tar.bz2 | |
x86/idt: Consolidate IDT invalidation
kexec and reboot have both code to invalidate IDT. Create a common function
and use it.
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/20170828064958.600953282@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/idt.c')
| -rw-r--r-- | arch/x86/kernel/idt.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c index 86e5912f2b70..cd4658c1e405 100644 --- a/arch/x86/kernel/idt.c +++ b/arch/x86/kernel/idt.c @@ -24,3 +24,14 @@ const struct desc_ptr debug_idt_descr = { .address = (unsigned long) debug_idt_table, }; #endif + +/** + * idt_invalidate - Invalidate interrupt descriptor table + * @addr: The virtual address of the 'invalid' IDT + */ +void idt_invalidate(void *addr) +{ + struct desc_ptr idt = { .address = (unsigned long) addr, .size = 0 }; + + load_idt(&idt); +} |