Re: [PATCH] livepatch: add (un)patch hooks

[Josh Poimboeuf]

On Wed, Jul 19, 2017 at 11:17:23PM -0500, Josh Poimboeuf wrote:
> +static void swapgs_unload_hook(void)
> +{
> +	if (paravirt_enabled() && strcmp(pv_info.name, "KVM"))
> +		return;
> +
> +	write_cr0(read_cr0() & ~X86_CR0_WP);
> +	barrier();
> +
> +	set_intr_gate_ist(X86_TRAP_SS, stack_segment_v2, STACKFAULT_STACK);

s/stack_segment_v2/stack_segment/ for the unload hook

> +
> +	barrier();
> +	write_cr0(read_cr0() | X86_CR0_WP);
> +}
> +KLP_UNLOAD_HOOK(swapgs_unload_hook);

-- 
Josh