linux-kernel - Re: [v4 3/3] x86, irq: Define a global vector for VT-d Posted-Interrupts

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Date:	Fri, 15 May 2015 15:27:11 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Feng Wu <feng.wu@...el.com>
cc:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	jiang.liu@...ux.intel.com
Subject: Re: [v4 3/3] x86, irq: Define a global vector for VT-d
 Posted-Interrupts

On Thu, 30 Apr 2015, Feng Wu wrote:
>  #ifdef CONFIG_HAVE_KVM
> +void (*wakeup_handler_callback)(void);
> +EXPORT_SYMBOL_GPL(wakeup_handler_callback);

The matching entry in a header file is going to come later again?

>  /*
>   * Handler for POSTED_INTERRUPT_VECTOR.
>   */
> @@ -256,6 +259,30 @@ __visible void smp_kvm_posted_intr_ipi(struct pt_regs *regs)
>  
>  	set_irq_regs(old_regs);
>  }
> +
> +/*
> + * Handler for POSTED_INTERRUPT_WAKEUP_VECTOR.
> + */
> +__visible void smp_kvm_posted_intr_wakeup_ipi(struct pt_regs *regs)
> +{
> +	struct pt_regs *old_regs = set_irq_regs(regs);
> +
> +	ack_APIC_irq();
> +
> +	irq_enter();
> +
> +	exit_idle();

  entering_ack_irq() please

> +	inc_irq_stat(kvm_posted_intr_wakeup_ipis);
> +
> +	if (wakeup_handler_callback)
> +		wakeup_handler_callback();
> +
> +	irq_exit();
> +
> +	set_irq_regs(old_regs);
> +}

Thanks,

	tglx
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