Re: [RFC PATCH v9 04/27] x86/cet: Add control-protection fault handler
From: Dave Hansen <hidden>
Date: 2020-02-26 17:10:46
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On 2/5/20 10:19 AM, Yu-cheng Yu wrote:
quoted hunk ↗ jump to hunk
diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c index 87ef69a72c52..8ed406f469e7 100644 --- a/arch/x86/kernel/idt.c +++ b/arch/x86/kernel/idt.c@@ -102,6 +102,10 @@ static const __initconst struct idt_data def_idts[] = { #elif defined(CONFIG_X86_32) SYSG(IA32_SYSCALL_VECTOR, entry_INT80_32), #endif + +#ifdef CONFIG_X86_64 + INTG(X86_TRAP_CP, control_protection), +#endif };
This patch in particular appears to have all of its code unconditionally
compiled in. That's in contrast to things that have Kconfig options, like:
#ifdef CONFIG_X86_MCE
INTG(X86_TRAP_MC, &machine_check),
#endif
or:
#ifdef CONFIG_X86_THERMAL_VECTOR
INTG(THERMAL_APIC_VECTOR, thermal_interrupt),
#endif
Is there a reason this code is always compiled in on 64-bit even when
the config option is off?