diff options
| author |   Thomas Gleixner <tglx@linutronix.de> | 2020-05-28 16:53:20 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-06-11 15:15:26 +0200 |
| commit | 3e77abda65b1cec10ef6b18b1ccfee0beaf400f1 (patch) | |
| tree | 6bc8e8b203695a35c7a68488c7641280664151f0 /arch/x86/mm | |
| parent | x86/idt: Cleanup trap_init() (diff) | |
| download | linux-dev-3e77abda65b1cec10ef6b18b1ccfee0beaf400f1.tar.xz linux-dev-3e77abda65b1cec10ef6b18b1ccfee0beaf400f1.zip | |
x86/idt: Consolidate idt functionality
- Move load_current_idt() out of line and replace the hideous comment with
a lockdep assert. This allows to make idt_table and idt_descr static.
- Mark idt_table read only after the IDT initialization is complete.
- Shuffle code around to consolidate the #ifdef sections into one.
- Adapt the F00F bug code.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200528145523.084915381@linutronix.de
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/fault.c | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index eef29bb53cd0..66be9bd60307 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -414,21 +414,13 @@ static int is_errata100(struct pt_regs *regs, unsigned long address) return 0; } +/* Pentium F0 0F C7 C8 bug workaround: */ static int is_f00f_bug(struct pt_regs *regs, unsigned long address) { #ifdef CONFIG_X86_F00F_BUG - unsigned long nr; - - /* - * Pentium F0 0F C7 C8 bug workaround: - */ - if (boot_cpu_has_bug(X86_BUG_F00F)) { - nr = (address - idt_descr.address) >> 3; - - if (nr == 6) { - handle_invalid_op(regs); - return 1; - } + if (boot_cpu_has_bug(X86_BUG_F00F) && idt_is_f00f_address(address)) { + handle_invalid_op(regs); + return 1; } #endif return 0; |