6493564fe3
Neuron is a device-sharing framework which is used by guests of the
haven hypervisor to serve or access shared I/O devices and other
inter-VM services.
There are three main layers that make up a neuron service.
channel - the physical layer transport that uses the hypervisor
provided transports.
protocol - defines the syntax and semantics to virtualize a specific
device across VMs. Block and Net are examples of protocols.
application - integrates the neuron service components into the rest of
the system. There would be front and back end application
drivers for the net protocol.
Change-Id: Ic7278fdaee1cd30147e91e1126643bce79c05e52
Signed-off-by: Chris Lew <clew@codeaurora.org>
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright (c) 2020 The Linux Foundation. All rights reserved. */
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#ifndef __H_PROT_BLOCK_COMMON_H
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#define __H_PROT_BLOCK_COMMON_H
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/* Block Server Advertisement message */
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struct neuron_block_advertise {
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u32 logical_block_size;
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u32 physical_block_size;
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u64 num_device_sectors;
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u32 flags;
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u32 discard_granularity;
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u64 discard_max_hw_sectors;
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u64 discard_max_sectors;
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u16 alignment_offset;
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bool wc_flag;
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bool fua_flag;
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u8 uuid[16];
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u8 label[];
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} __packed;
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/* Request message */
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struct neuron_block_req {
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u32 req_id;
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u16 req_type;
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u16 flags;
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u64 start_sector;
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u32 sectors;
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} __packed;
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/* Response message */
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struct neuron_block_resp {
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u32 resp_id;
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u16 resp_status;
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} __packed;
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/* Bit position definition for flags field in struct neuron_block_req */
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enum neuron_block_param_flags_bit {
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NEURON_BLOCK_PARAM_FLAG_READONLY = 0,
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NEURON_BLOCK_PARAM_FLAG_DISCARD_ZEROES,
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};
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#define NEURON_BLOCK_READONLY BIT(NEURON_BLOCK_PARAM_FLAG_READONLY)
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#define NEURON_BLOCK_DISCARD_ZEROES BIT(NEURON_BLOCK_PARAM_FLAG_DISCARD_ZEROES)
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#endif
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