Date: Tue, 10 Dec 2013 15:27:47 -0500 From: John Baldwin <jhb@freebsd.org> To: grehan@freebsd.org, neel@freebsd.org Cc: virtualization@freebsd.org Subject: [PATCH] Additional lapic support for bhyve Message-ID: <201312101527.47234.jhb@freebsd.org>
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This patch extends the local APIC emulation a bit by adding the following things: - Add an ioctl and a bhyvectl command to trigger local interrupts on a local APIC. The "fixed" and "NMI" delivery modes are enabled. - Add support for the CMCI LVT entry. - Add the ability to report local APIC errors and trigger errors for invalid vectors when sending IPIs or firing an external interrupt that references an invalid IDT vector. - Silently force all reserved fields in LVT entries to zero when they are written (removes the need for clearing those bits when triggering an LVT interrupt). - Add entries to the MP Table and MADT to advertise the typical x86 LINT configuration (ExtINT on LINT0 and NMI on LINT1). - Add a bhyvectl command to inject an NMI on an arbitrary CPU (this latter should probably be a separate patch) In particular, while bhyectl --inject-nmi can inject an NMI on a single vcpu, the more traditional way of signalling a system-wide error (such as SERR# or PERR#) is to assert the LINT1 pins on all CPUs. This can now be done via 'bhyectl --vm=foo --cpu=-1 --assert-lapic-lvt=1' (cpu of -1 is a broadcast to all CPUs for the LVT ioctl). The patch is at people.freebsd.org/~jhb/patches/bhyve_lapic.patch I'm certainly open to suggestions on ways to make this be more consistent with the style/design/flow of the existing code. (I started on this because I want to add support for machine check injection so I can use bhyve to test the machine check code, but for that I wanted CMCI support and it kind of snowballed from there) -- John Baldwin
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