From mboxrd@z Thu Jan 1 00:00:00 1970 To: 9fans@9fans.net Date: Thu, 24 Jan 2013 10:00:01 +0000 From: p9 newbie Message-ID: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Subject: [9fans] plan9: how to get irq to mach routing Topicbox-Message-UUID: 0e46e724-ead8-11e9-9d60-3106f5b1d025 Hi,=20 I would like to retrieve what IRQs are routed to what Machs (or lapics). = I dumped IOAPIC's Redirection Table entries, but Destination bits [63:48] = are always '0xFF'. Is there way to determine the routing between IRQs and = Machs/LAPICs serving them?. One rudimentary way I tried is that, in the i= nterrupt service routine I accessed the 'm' (Mach *) external variable to f= igure the routing between the IRQ and and the Mach.. Wondering if there is= a better way. (for all legacy, msi and msi-x interrupt types) Thanks rg