2f4adfad0a
Since VFIO cannot be used to map the same device twice, secondary processes receive the device/group fd's by means of communicating over a local socket. Only group and container fd's should be sent, as device fd's can be obtained via ioctl() calls' on the group fd. For multiprocess, VFIO distinguishes between existing but unused groups (e.g. grups that aren't bound to VFIO driver) and non-existing groups in order to know if the secondary process requests a valid group, or if secondary process requests something that doesn't exist. VFIO multiprocess sync communicates over a simple protocol. It defines two requests - request for group fd, and request for container fd. Possible replies are: SOCKET_OK (an OK signal), SOCKET_ERR (error signal) and SOCKET_NO_FD (a signal that indicates that the requested VFIO group is valid, but no fd is present for that group - indicating that the respective group is simply not bound to VFIO driver). Here is the logic in a nutshell: 1. secondary process sends SOCKET_REQ_CONTAINER or SOCKET_REQ_GROUP 1a. in case of SOCKET_REQ_GROUP, client also then sends group number 2. primary process receives message 2a. in case of invalid group, SOCKET_ERR is sent back to secondary 2b. in case of unbound group, SOCKET_NO_FD is sent back to secondary 2c. in case of valid group, SOCKET_OK is sent and followed by fd 3. socket is closed in case of any error, socket is closed and SOCKET_ERR is sent. Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com> Tested-by: Waterman Cao <waterman.cao@intel.com> Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>
110 lines
4.7 KiB
Makefile
110 lines
4.7 KiB
Makefile
# BSD LICENSE
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#
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# Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of Intel Corporation nor the names of its
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# contributors may be used to endorse or promote products derived
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# from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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include $(RTE_SDK)/mk/rte.vars.mk
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LIB = librte_eal.a
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VPATH += $(RTE_SDK)/lib/librte_eal/common
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CFLAGS += -I$(SRCDIR)/include
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CFLAGS += -I$(RTE_SDK)/lib/librte_eal/common/include
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CFLAGS += -I$(RTE_SDK)/lib/librte_ring
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CFLAGS += -I$(RTE_SDK)/lib/librte_mempool
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CFLAGS += -I$(RTE_SDK)/lib/librte_malloc
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CFLAGS += -I$(RTE_SDK)/lib/librte_ether
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CFLAGS += -I$(RTE_SDK)/lib/librte_ivshmem
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CFLAGS += -I$(RTE_SDK)/lib/librte_pmd_ring
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CFLAGS += -I$(RTE_SDK)/lib/librte_pmd_pcap
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CFLAGS += -I$(RTE_SDK)/lib/librte_pmd_xenvirt
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CFLAGS += $(WERROR_FLAGS) -O3
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# specific to linuxapp exec-env
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) := eal.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_hugepage_info.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_memory.c
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ifeq ($(CONFIG_RTE_LIBRTE_XEN_DOM0),y)
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_xen_memory.c
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endif
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_thread.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_log.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_pci.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_pci_uio.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_pci_vfio.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_pci_vfio_mp_sync.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_debug.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_lcore.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_timer.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_interrupts.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_alarm.c
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ifeq ($(CONFIG_RTE_LIBRTE_IVSHMEM),y)
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_ivshmem.c
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endif
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# from common dir
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_memzone.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_log.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_launch.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_pci.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_memory.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_tailqs.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_errno.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_cpuflags.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_string_fns.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_hexdump.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_devargs.c
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SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_common_dev.c
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CFLAGS_eal.o := -D_GNU_SOURCE
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CFLAGS_eal_thread.o := -D_GNU_SOURCE
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CFLAGS_eal_log.o := -D_GNU_SOURCE
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CFLAGS_eal_common_log.o := -D_GNU_SOURCE
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CFLAGS_eal_hugepage_info.o := -D_GNU_SOURCE
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CFLAGS_eal_pci.o := -D_GNU_SOURCE
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CFLAGS_eal_pci_vfio.o := -D_GNU_SOURCE
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CFLAGS_eal_common_whitelist.o := -D_GNU_SOURCE
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# workaround for a gcc bug with noreturn attribute
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# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12603
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ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y)
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CFLAGS_eal_thread.o += -Wno-return-type
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endif
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INC := rte_per_lcore.h rte_lcore.h rte_interrupts.h rte_kni_common.h rte_dom0_common.h
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SYMLINK-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP)-include/exec-env := \
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$(addprefix include/exec-env/,$(INC))
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DEPDIRS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += lib/librte_eal/common
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include $(RTE_SDK)/mk/rte.lib.mk
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