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SubjectRe: [PATCH 1/1] x86/hyper-V: Allocate the IDT entry early in boot
On Fri, 8 Sep 2017, K. Y. Srinivasan wrote:

> Allocate the hypervisor callback IDT entry early in the boot sequence.
>
> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
> ---
> arch/x86/kernel/cpu/mshyperv.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
> index 3b3f713e15e5..236324e83a3a 100644
> --- a/arch/x86/kernel/cpu/mshyperv.c
> +++ b/arch/x86/kernel/cpu/mshyperv.c
> @@ -59,8 +59,6 @@ void hyperv_vector_handler(struct pt_regs *regs)
> void hv_setup_vmbus_irq(void (*handler)(void))
> {
> vmbus_handler = handler;
> - /* Setup the IDT for hypervisor callback */
> - alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, hyperv_callback_vector);
> }
>
> void hv_remove_vmbus_irq(void)
> @@ -251,6 +249,8 @@ static void __init ms_hyperv_init_platform(void)
> */
> x86_platform.apic_post_init = hyperv_init;
> hyperv_setup_mmu_ops();
> + /* Setup the IDT for hypervisor callback */
> + alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, hyperv_callback_vector);
> #endif
> }

Nice. So we can make all of that gate/idt stuff __init now.

That makes my previous fix obsolete, right?

Thanks,

tglx


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