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df57775d7a
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
Sponsored by: The FreeBSD Foundation
(cherry picked from commit 97993d1ebf)
38 lines
783 B
Makefile
38 lines
783 B
Makefile
# $FreeBSD$
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.PATH: ${SRCTOP}/sys/dev/hyperv/vmbus \
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${SRCTOP}/sys/dev/hyperv/vmbus/${MACHINE_CPUARCH}
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KMOD= hv_vmbus
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SRCS= hyperv.c \
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hyperv_busdma.c \
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hyperv_machdep.c \
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vmbus.c \
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vmbus_br.c \
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vmbus_chan.c \
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vmbus_et.c \
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vmbus_if.c \
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vmbus_res.c \
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vmbus_xact.c
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.if ${MACHINE_CPUARCH} != "i386"
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SRCS+= vmbus_vector.S
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.endif
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SRCS+= acpi_if.h bus_if.h device_if.h opt_acpi.h pci_if.h pcib_if.h vmbus_if.h
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# XXX: for assym.inc
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SRCS+= opt_kstack_pages.h opt_nfs.h opt_hwpmc_hooks.h
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.if ${MACHINE_CPUARCH} == "i386"
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SRCS+= opt_apic.h
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.endif
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DPSRCS= assym.inc
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vmbus_vector.o:
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${CC} -c -x assembler-with-cpp -DLOCORE ${CFLAGS} \
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${.IMPSRC} -o ${.TARGET}
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CFLAGS+= -I${SRCTOP}/sys/dev/hyperv/include \
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-I${SRCTOP}/sys/dev/hyperv/vmbus
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.include <bsd.kmod.mk>
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