On Mon, Sep 13, 2021 at 11:36:24PM +0200, Thomas Gleixner wrote:

quoted

From the interrupt perspective the sequence:

        disable_irq();
        vp_dev->intx_soft_enabled = true;
        enable_irq();

is perfectly fine as well. Any interrupt arriving during the disabled
section will be reraised on enable_irq() in hardware because it's a
level interrupt. Any resulting failure is either a hardware or a
hypervisor bug.

yes but it's a shared interrupt. what happens if multiple callers do
this in parallel?

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