64cc0764ee
Recent changes to the arm64 MMU code mean that you can no longer map R/O memory as R/W. Mapping R/W memory now causes a cache invalidation instruction (DC IVAC) that requires write permissions or else a fault is generated. Modify ivshmem-v2 to map each R/O and R/W section individually Signed-off-by: Grant Ramsay <gramsay@enphaseenergy.com>
76 lines
2 KiB
Plaintext
76 lines
2 KiB
Plaintext
# Virtualization drivers configuration options
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# Copyright (c) 2015-2020 Intel Corporation
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# SPDX-License-Identifier: Apache-2.0
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menuconfig VIRTUALIZATION
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bool "Virtualization guest drivers"
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help
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This contains various drivers meant to support and expose features
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when Zephyr is running as a guest in a virtualized or emulated
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environment.
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if VIRTUALIZATION
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config IVSHMEM
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bool "Inter-VM shared memory device (ivshmem)"
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depends on PCIE
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help
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This will enable support of qemu's ivshmem device, which is also
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present in ACRN hypervisor, and lets VM sharing memory with each
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other.
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if IVSHMEM
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module = IVSHMEM
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module-str = ivshmem
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source "subsys/logging/Kconfig.template.log_config"
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config IVSHMEM_DOORBELL
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bool "Support interrupt based ivshmem (doorbell version)"
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help
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This will enable support of ivshmem-doorbell, i.e. the interrupt
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based ivshmem. For ivshmem-v2 INTx interrupts are also supported.
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config IVSHMEM_MSI_X_VECTORS
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int "How many notification vectors should be pre-allocated?"
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default 2
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depends on IVSHMEM_DOORBELL
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help
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MSI-X vector holders must be pre-allocated. One can pre-allocate
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more or less than necessary. Depends on how many VMs will connect
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with each other. These are know to be the notification vectors in
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ivshmem.
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config IVSHMEM_INT_PRIORITY
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int "MSI-X interrupt priority"
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default 2
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depends on IVSHMEM_DOORBELL
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help
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Interrupt priority used for the MSI-X generated interrupts.
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INTx interrupt priority is configured in the device tree.
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config IVSHMEM_SHELL
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bool "IVshmem shell module"
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depends on SHELL
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help
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This is mostly a module to help getting info the ivshmem and/or
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quickly testing your ivshmem client application (from another VM).
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endif # IVSHMEM
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config IVSHMEM_V2
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bool "Inter-VM shared memory v2 (ivshmem-v2)"
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select IVSHMEM
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help
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Enable ivshmem-v2 support.
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ivshmem-v2 is primarily used for IPC in the Jailhouse hypervisor.
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config IVSHMEM_V2_MAX_PEERS
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int "Maximum number of ivshmem-v2 peers"
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depends on IVSHMEM_V2
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default 2
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range 2 65536
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endif # VIRTUALIZATION
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