Messages in this thread Patch in this message | | | Subject | [PATCH] x86: add is_f00f_bug helper to fault_32|64.c | From | Harvey Harrison <> | Date | Tue, 15 Jan 2008 18:48:35 -0800 |
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Further towards unifying these files, add another helper in same spirit as is_errata93. Add an #ifdef around the forward declaration of do_invalid_op to make it clear it is only needed in the one place.
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> --- arch/x86/mm/fault_32.c | 41 ++++++++++++++++++++++++----------------- arch/x86/mm/fault_64.c | 26 ++++++++++++++++++++++++++ 2 files changed, 50 insertions(+), 17 deletions(-)
diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c index 936bb0c..f50df86 100644 --- a/arch/x86/mm/fault_32.c +++ b/arch/x86/mm/fault_32.c @@ -211,8 +211,6 @@ void dump_pagetable(unsigned long address) printk("\n"); } -void do_invalid_op(struct pt_regs *, unsigned long); - static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address) { unsigned index = pgd_index(address); @@ -288,6 +286,28 @@ static int is_errata93(struct pt_regs *regs, unsigned long address) return 0; } +#ifdef CONFIG_X86_F00F_BUG +void do_invalid_op(struct pt_regs *, unsigned long); +#endif + +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_data.f00f_bug) { + nr = (address - idt_descr.address) >> 3; + + if (nr == 6) { + do_invalid_op(regs, 0); + return 1; + } + } +#endif + return 0; +} /* * Handle a fault on the vmalloc or module mapping area @@ -570,21 +590,8 @@ bad_area_nosemaphore: return; } -#ifdef CONFIG_X86_F00F_BUG - /* - * Pentium F0 0F C7 C8 bug workaround. - */ - if (boot_cpu_data.f00f_bug) { - unsigned long nr; - - nr = (address - idt_descr.address) >> 3; - - if (nr == 6) { - do_invalid_op(regs, 0); - return; - } - } -#endif + if (is_f00f_bug(regs, address)) + return; no_context: /* Are we prepared to handle this kernel fault? */ diff --git a/arch/x86/mm/fault_64.c b/arch/x86/mm/fault_64.c index cde110c..17cafe8 100644 --- a/arch/x86/mm/fault_64.c +++ b/arch/x86/mm/fault_64.c @@ -256,6 +256,29 @@ static int is_errata93(struct pt_regs *regs, unsigned long address) return 0; } +#ifdef CONFIG_X86_F00F_BUG +void do_invalid_op(struct pt_regs *, unsigned long); +#endif + +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_data.f00f_bug) { + nr = (address - idt_descr.address) >> 3; + + if (nr == 6) { + do_invalid_op(regs, 0); + return 1; + } + } +#endif + return 0; +} + static noinline void pgtable_bad(unsigned long address, struct pt_regs *regs, unsigned long error_code) { @@ -572,6 +595,9 @@ bad_area_nosemaphore: return; } + if (is_f00f_bug(regs, address)) + return; + no_context: /* Are we prepared to handle this kernel fault? */ if (fixup_exception(regs)) -- 1.5.4.rc2.1164.g6451
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