id = 1948
title = "ARM GICv3 cannot support irq number > 992"
state = "opened"
created_at = "2023-10-17T02:59:17.701Z"
closed_at = "n/a"
labels = ["target: arm"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/1948"
host-os = "Linux"
host-arch = "x86"
qemu-version = "v7.2.0"
guest-os = "Linux"
guest-arch = "ARM"
description = """If we want to create a gic with supported irq number 992, we need to set the `num-irq` property to 992 + 32 while 32 is the extra SGI number. But there is a problem, when QEMU initialize GICv3, it will check the variable `num_irq <= 1020 && (num_irq & 32) == 0`, which will lead to error abort. So there is no way to bypass the ```num_irq <= 1020``` check and we cannot use irq number bigger than 992 while in ARM GIC specification, irq number < 1020 should all be aviliable to use."""
reproduce = "n/a"
additional = "n/a"