On Thu, Mar 13, 2014 at 11:53:04AM +0100, Paolo Bonzini wrote:
> Instead of this, I'm adding the following to the KVM_IRQ_LINE ioctl:
>
> +On real hardware, interrupt pins can be active-low or active-high. This
> +does not matter for the level field of struct kvm_irq_level: 1 always
> +means acti
Il 28/02/2014 05:06, Gabriel L. Somlo ha scritto:
> +NOTE: For each level-triggered interrupt managed by a virtual ioapic,
> +the guest OS may set a polarity value (bit 13 of each corresponding I/O
> +redirection table register). The polarity bit defines the relationship
> +between an irq line's lo
On Thu, Feb 27, 2014 at 11:06:17PM -0500, Gabriel L. Somlo wrote:
> Both QEMU and KVM have already accumulated a significant number of
> optimizations based on the hard-coded assumption that ioapic polarity
> will always use the ActiveHigh convention, where the logical and
> physical states of leve
Both QEMU and KVM have already accumulated a significant number of
optimizations based on the hard-coded assumption that ioapic polarity
will always use the ActiveHigh convention, where the logical and
physical states of level-triggered irq lines always match (i.e.,
active(asserted) == high == 1, i
