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/openbmc/qemu/qapi/
H A Dmigration.json1 # -*- Mode: Python -*-
6 # = Migration
15 # Detailed migration status.
22 # @total: total amount of bytes involved in the migration process
28 # @normal-bytes: number of normal bytes sent (since 1.2)
30 # @dirty-pages-rate: number of pages dirtied by second by the guest
35 # @dirty-sync-count: number of times that dirty ram was synchronized
38 # @postcopy-requests: The number of page requests received from the
41 # @page-size: The number of bytes per page for the various page-based
44 # @multifd-bytes: The number of bytes sent through multifd (since 3.0)
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/openbmc/qemu/docs/
H A Drdma.txt2 RDMA Live Migration Specification, Version # 1
18 * RDMA Migration Protocol Description
21 * Migration of VM's ram
28 RDMA helps make your migration more deterministic under heavy load because
31 data copies by bypassing the host networking stack. In particular, a TCP-based
32 migration, under certain types of memory-bound workloads, may take a more
33 unpredictable amount of time to complete the migration if the amount of
34 memory tracked during each live migration iteration round cannot keep pace
38 over Converged Ethernet) as well as Infiniband-based. This implementation of
39 migration using RDMA is capable of using both technologies because of
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/openbmc/qemu/docs/system/i386/
H A Dmicrovm.rst8 designed for short-lived guests. microvm also establishes a baseline
14 -----------------
18 - ISA bus
19 - i8259 PIC (optional)
20 - i8254 PIT (optional)
21 - MC146818 RTC (optional)
22 - One ISA serial port (optional)
23 - LAPIC
24 - IOAPIC (with kernel-irqchip=split by default)
25 - kvmclock (if using KVM)
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/openbmc/qemu/
H A Dhmp-commands.hx27 .help = "commit changes to the disk images (if -snapshot is used) or backing files",
33 Commit changes to the disk images (if -snapshot is used) or backing files.
70 available during the preconfig state (i.e. when the --preconfig command
78 .help = "resize a block image",
86 Resize a block image while a guest is running. Usually requires guest
89 resizes image files, it can not resize block devices like LVM volumes.
96 .help = "copy data from a backing file into a block device",
103 Copy data from a backing file into a block device.
110 .help = "set maximum speed for a background block operation",
117 Set maximum speed for a background block operation.
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H A Dqemu-options.hx14 "-h or -help display this help and exit\n", QEMU_ARCH_ALL)
16 ``-h``
21 "-version display version information and exit\n", QEMU_ARCH_ALL)
23 ``-version``
28 "-machine [type=]name[,prop[=value][,...]]\n"
29 " selects emulated machine ('-machine help' for list)\n"
33 " dump-guest-core=on|off include guest memory in a core dump (default=on)\n"
34 " mem-merge=on|off controls memory merge support (default: on)\n"
35 " aes-key-wrap=on|off controls support for AES key wrapping (default=on)\n"
36 " dea-key-wrap=on|off controls support for DEA key wrapping (default=on)\n"
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/openbmc/linux/include/linux/
H A Dpreempt.h1 /* SPDX-License-Identifier: GPL-2.0 */
6 * include/linux/preempt.h - macros for accessing and manipulating
18 * - bits 0-7 are the preemption count (max preemption depth: 256)
19 * - bits 8-15 are the softirq count (max # of softirqs: 256)
43 #define __IRQ_MASK(x) ((1UL << (x))-1)
60 * Disable preemption until the scheduler is running -- use an unconditional
63 * Reset by start_kernel()->sched_init()->init_idle()->init_idle_preempt_count().
82 * interrupt_context_level - return interrupt context level
85 * 0 - normal context
86 * 1 - softirq context
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/openbmc/qemu/docs/system/
H A Dintroduction.rst7 ---------------------------
14 .. list-table:: Supported Accelerators
15 :header-rows: 1
17 * - Accelerator
18 - Host OS
19 - Host Architectures
20 * - KVM
21 - Linux
22 - Arm (64 bit only), MIPS, PPC, RISC-V, s390x, x86
23 * - Xen
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/openbmc/qemu/migration/
H A Dmigration.c2 * QEMU live migration
10 * the COPYING file in the top-level directory.
12 * Contributions after 2012-01-13 are licensed under the terms of the
18 #include "qemu/error-report.h"
19 #include "qemu/main-loop.h"
20 #include "migration/blocker.h"
27 #include "sysemu/cpu-throttle.h"
30 #include "migration/global_state.h"
31 #include "migration/misc.h"
32 #include "migration.h"
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H A Drdma.c4 * Copyright IBM, Corp. 2010-2013
5 * Copyright Red Hat, Inc. 2015-2016
13 * later. See the COPYING file in the top-level directory.
22 #include "migration.h"
23 #include "migration-stats.h"
24 #include "qemu-file.h"
26 #include "qemu/error-report.h"
27 #include "qemu/main-loop.h"
52 * This is only for non-live state being migrated.
78 * A work request ID is 64-bits and we split up these bits
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/openbmc/qemu/docs/interop/
H A Dvhost-user.rst4 Vhost-user Protocol
11 version 2 or later. See the COPYING file in the top-level
26 The protocol defines 2 sides of the communication, *front-end* and
27 *back-end*. The *front-end* is the application that shares its virtqueues, in
28 our case QEMU. The *back-end* is the consumer of the virtqueues.
30 In the current implementation QEMU is the *front-end*, and the *back-end*
33 or a block device back-end processing read & write to a virtual
34 disk. In order to facilitate interoperability between various back-end
38 The *front-end* and *back-end* can be either a client (i.e. connecting) or
42 --------------------------------------
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H A Dbitmaps.rst12 Dirty Bitmaps are in-memory objects that track writes to block devices. They
13 can be used in conjunction with various block job operations to perform
16 This document explains the conceptual mechanisms, as well as up-to-date,
27 --------
30 ("dirty") segment of the corresponding block device. The size of the segment
50 Bitmaps can be created at any time and can be attached to any arbitrary block
63 QEMU also supports the migration of both transient bitmaps (tracking any
64 arbitrary image format) or persistent bitmaps (qcow2) via live migration.
67 -----------------------
83 ------------------
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/openbmc/linux/Documentation/mm/
H A Dhighmem.rst30 +--------+ 0xffffffff
32 +--------+ 0xc0000000
36 +--------+ 0x00000000
39 time, but because we need virtual address space for other things - including
40 temporary maps to access the rest of the physical memory - the actual direct
54 * kmap_local_page(), kmap_local_folio() - These functions are used to create
64 These mappings are thread-local and CPU-local, meaning that the mapping
68 CPU-hotplug until the mapping is disposed.
74 disable preemption because, when context switches to a different task, the
125 Each call of kmap_atomic() in the kernel creates a non-preemptible section
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/openbmc/qemu/block/
H A Dvdi.c2 * Block driver for the Virtual Disk Image (VDI) format
6 * SPDX-License-Identifier: GPL-2.0-or-later
30 * Deallocation of zero-filled blocks and shrinking images are missing, too
31 * (might be added to common block layer).
33 * Allocation of blocks could be optimized (less writes to block map and
37 * (current code uses one operation per block (1 MiB).
40 * block table, no problem with current QEMU).
49 * The driver keeps a block cache (little endian entries) in memory.
50 * For the standard block size (1 MiB), a 1 TiB disk will use 4 MiB RAM,
57 #include "qapi/qobject-input-visitor.h"
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H A Dqcow.c2 * Block driver for the QCOW format
4 * Copyright (c) 2004-2006 Fabrice Bellard
27 #include "qemu/error-report.h"
28 #include "block/block_int.h"
29 #include "block/qdict.h"
30 #include "sysemu/block-backend.h"
39 #include "qapi/qobject-input-visitor.h"
40 #include "qapi/qapi-visit-block-core.h"
41 #include "crypto/block.h"
42 #include "migration/blocker.h"
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H A Dvpc.c2 * Block driver for Connectix / Microsoft Virtual PC images
28 #include "block/block_int.h"
29 #include "block/qdict.h"
30 #include "sysemu/block-backend.h"
33 #include "migration/blocker.h"
38 #include "qapi/qobject-input-visitor.h"
39 #include "qapi/qapi-visit-block-core.h"
63 /* always big-endian */
108 /* Offset of the Block Allocation Table (BAT) */
122 /* Backing file name (in UTF-16) */
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H A Dparallels.c2 * Block driver for Parallels disk image format
32 #include "qemu/error-report.h"
34 #include "block/block_int.h"
35 #include "block/qdict.h"
36 #include "sysemu/block-backend.h"
40 #include "qapi/qobject-input-visitor.h"
41 #include "qapi/qapi-visit-block-core.h"
45 #include "migration/blocker.h"
64 #define PARALLELS_OPT_PREALLOC_MODE "prealloc-mode"
65 #define PARALLELS_OPT_PREALLOC_SIZE "prealloc-size"
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H A Dvhdx.c2 * Block driver for Hyper-V VHDX Images
11 * https://www.microsoft.com/en-us/download/details.aspx?id=34750
14 * See the COPYING.LIB file in the top-level directory.
20 #include "block/block_int.h"
21 #include "block/qdict.h"
22 #include "sysemu/block-backend.h"
27 #include "qemu/error-report.h"
30 #include "migration/blocker.h"
33 #include "qapi/qobject-input-visitor.h"
34 #include "qapi/qapi-visit-block-core.h"
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/openbmc/linux/Documentation/networking/
H A Dip-sysctl.rst1 .. SPDX-License-Identifier: GPL-2.0
10 ip_forward - BOOLEAN
11 - 0 - disabled (default)
12 - not 0 - enabled
20 ip_default_ttl - INTEGER
21 Default value of TTL field (Time To Live) for outgoing (but not
25 ip_no_pmtu_disc - INTEGER
26 Disable Path MTU Discovery. If enabled in mode 1 and a
27 fragmentation-required ICMP is received, the PMTU to this
38 accept fragmentation-needed errors if the underlying protocol
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/openbmc/openbmc/meta-openembedded/meta-oe/recipes-extended/valkey/valkey/
H A Dvalkey.conf6 # ./valkey-server /path/to/valkey.conf
24 # to customize a few per-server settings. Include files can include
84 # By default protected mode is enabled. You should disable it only if
88 protected-mode yes
96 # In high requests-per-second environments you need an high backlog in order
101 tcp-backlog 511
112 # Close the connection after a client is idle for N seconds (0 to disable)
117 # If non-zero, use SO_KEEPALIVE to send TCP ACKs to clients in absence
130 tcp-keepalive 300
139 # supervised no - no supervision interaction
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/openbmc/openbmc/meta-openembedded/meta-oe/recipes-extended/redis/redis/
H A Dredis.conf6 # ./redis-server /path/to/redis.conf
24 # to customize a few per-server settings. Include files can include
84 # By default protected mode is enabled. You should disable it only if
88 protected-mode yes
96 # In high requests-per-second environments you need an high backlog in order
101 tcp-backlog 511
112 # Close the connection after a client is idle for N seconds (0 to disable)
117 # If non-zero, use SO_KEEPALIVE to send TCP ACKs to clients in absence
130 tcp-keepalive 300
139 # supervised no - no supervision interaction
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/openbmc/openbmc/meta-openembedded/meta-oe/recipes-extended/redis/redis-7.2.7/
H A Dredis.conf6 # ./redis-server /path/to/redis.conf
24 # to customize a few per-server settings. Include files can include
84 # By default protected mode is enabled. You should disable it only if
88 protected-mode yes
96 # In high requests-per-second environments you need an high backlog in order
101 tcp-backlog 511
112 # Close the connection after a client is idle for N seconds (0 to disable)
117 # If non-zero, use SO_KEEPALIVE to send TCP ACKs to clients in absence
130 tcp-keepalive 300
139 # supervised no - no supervision interaction
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/openbmc/qemu/include/exec/
H A Dmemory.h10 * the COPYING file in the top-level directory.
19 #include "exec/cpu-common.h"
35 #define MAX_PHYS_ADDR (((hwaddr)1 << MAX_PHYS_ADDR_SPACE_BITS) - 1)
37 #define TYPE_MEMORY_REGION "memory-region"
41 #define TYPE_IOMMU_MEMORY_REGION "iommu-memory-region"
46 #define TYPE_RAM_DISCARD_MANAGER "ram-discard-manager"
67 /* Dirty tracking enabled because migration is running */
97 * @nonvolatile: this section is non-volatile
159 * should be able to take care of over-sized invalidations.
196 /* RAM is pre-allocated and passed into qemu_ram_alloc_from_ptr */
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/openbmc/linux/Documentation/virt/kvm/
H A Dapi.rst1 .. SPDX-License-Identifier: GPL-2.0
4 The Definitive KVM (Kernel-based Virtual Machine) API Documentation
13 - System ioctls: These query and set global attributes which affect the
17 - VM ioctls: These query and set attributes that affect an entire virtual
24 - vcpu ioctls: These query and set attributes that control the operation
32 - device ioctls: These query and set attributes that control the operation
80 facility that allows backward-compatible extensions to the API to be
104 the ioctl returns -ENOTTY.
122 -----------------------
139 -----------------
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/openbmc/linux/mm/
H A Dzsmalloc.c10 * Released under the terms of 3-clause BSD License
19 * page->private: points to zspage
20 * page->index: links together all component pages of a zspage
23 * page->page_type: first object offset in a subpage of zspage
36 * pool->lock
37 * zspage->lock
99 #define _PFN_BITS (MAX_POSSIBLE_PHYSMEM_BITS - PAGE_SHIFT)
105 * header keeps handle which is 4byte-aligned address so we
113 #define OBJ_INDEX_BITS (BITS_PER_LONG - _PFN_BITS - OBJ_TAG_BITS)
114 #define OBJ_INDEX_MASK ((_AC(1, UL) << OBJ_INDEX_BITS) - 1)
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/openbmc/linux/init/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
8 - Re-run Kconfig when the compiler is updated
13 - Ensure full rebuild when the compiler is updated
14 include/linux/compiler-version.h contains this option in the comment
16 auto-generated dependency. When the compiler is updated, syncconfig
20 def_bool $(success,test "$(cc-name)" = GCC)
24 default $(cc-version) if CC_IS_GCC
28 def_bool $(success,test "$(cc-name)" = Clang)
32 default $(cc-version) if CC_IS_CLANG
36 def_bool $(success,test "$(as-name)" = GNU)
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