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The vmbus ISR needs to live in a trampoline. Dynamically allocating a trampoline at driver initialization time poses some difficulties due to the fact that the KENTER macro assumes that the offset relative to tramp_idleptd is fixed at static link time. Another problem is that native_lapic_ipi_alloc() uses setidt(), which assumes a fixed trampoline offset. Rather than fight this, move the Hyper-V ISR to i386/exception.s. Add a new HYPERV kernel option to make this optional, and configure it by default on i386. This is sufficient to make use of vmbus(4) after the 4/4 split. Note that vmbus cannot be loaded dynamically and both the HYPERV option and device must be configured together. I think this is not too onerous a requirement, since vmbus(4) was previously non-functional. Reported by: Harry Schmalzbauer <freebsd@omnilan.de> Tested by: Harry Schmalzbauer <freebsd@omnilan.de> Reviewed by: whu, kib MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D30577 |
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| .. | ||
| amd64 | ||
| i386 | ||
| hyperv.c | ||
| hyperv_busdma.c | ||
| hyperv_machdep.h | ||
| hyperv_reg.h | ||
| hyperv_var.h | ||
| vmbus.c | ||
| vmbus_br.c | ||
| vmbus_brvar.h | ||
| vmbus_chan.c | ||
| vmbus_chanvar.h | ||
| vmbus_et.c | ||
| vmbus_if.m | ||
| vmbus_reg.h | ||
| vmbus_res.c | ||
| vmbus_var.h | ||
| vmbus_xact.c | ||