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arm64: compat: Add cp15_32 and cp15_64 handler arrays
We're now ready to start handling CP15 access. Let's add (empty) arrays for both 32 and 64bit accessors, and the code that deals with them. Reviewed-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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1 changed files with 28 additions and 0 deletions
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@ -625,8 +625,18 @@ static void arm64_compat_skip_faulting_instruction(struct pt_regs *regs,
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arm64_skip_faulting_instruction(regs, sz);
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}
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static struct sys64_hook cp15_32_hooks[] = {
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{},
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};
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static struct sys64_hook cp15_64_hooks[] = {
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{},
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};
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asmlinkage void __exception do_cp15instr(unsigned int esr, struct pt_regs *regs)
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{
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struct sys64_hook *hook, *hook_base;
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if (!cp15_cond_valid(esr, regs)) {
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/*
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* There is no T16 variant of a CP access, so we
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@ -636,6 +646,24 @@ asmlinkage void __exception do_cp15instr(unsigned int esr, struct pt_regs *regs)
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return;
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}
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switch (ESR_ELx_EC(esr)) {
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case ESR_ELx_EC_CP15_32:
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hook_base = cp15_32_hooks;
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break;
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case ESR_ELx_EC_CP15_64:
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hook_base = cp15_64_hooks;
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break;
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default:
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do_undefinstr(regs);
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return;
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}
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for (hook = hook_base; hook->handler; hook++)
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if ((hook->esr_mask & esr) == hook->esr_val) {
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hook->handler(esr, regs);
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return;
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}
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/*
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* New cp15 instructions may previously have been undefined at
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* EL0. Fall back to our usual undefined instruction handler
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