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/linux/include/uapi/linux/
H A Dvirtio_ring.h42 /* This marks a buffer as write-only (otherwise read-only). */
54 /* The Host uses this in used->flags to advise the Guest: don't kick me when
55 * you add a buffer. It's unreliable, so it's simply an optimization. Guest
58 /* The Guest uses this in avail->flags to advise the Host: don't interrupt me
83 /* The Guest publishes the used index for which it expects an interrupt
84 * at the end of the avail ring. Host should ignore the avail->flags field. */
86 * at the end of the used ring. Guest should ignore the used->flags field. */
90 * When using pre-virtio 1.0 layout, these fall out naturally.
97 * struct vring_desc - Virtio ring descriptors,
100 * @addr: buffer address (guest-physical)
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H A Dvhost.h1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
4 /* Userspace interface for in-kernel virtio accelerators. */
8 * Existing virtio net code is used in the guest without modification.
18 #define VHOST_FILE_UNBIND -1
76 /* Get accessor: reads index, writes value in num */
79 /* Set the vring byte order in num. Valid values are VHOST_VRING_LITTLE_ENDIAN
80 * or VHOST_VRING_BIG_ENDIAN (other values return -EINVAL).
82 * returns -EBUSY.
130 * used for transmit. Pass fd -1 to unbind from the socket and the transmit
151 /* Get the device id. The device ids follow the same definition of
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/linux/drivers/irqchip/
H A Dirq-riscv-imsic-state.c1 // SPDX-License-Identifier: GPL-2.0
7 #define pr_fmt(fmt) "riscv-imsic: " fmt
22 #include "irq-riscv-imsic-state.h"
63 return imsic ? &imsic->global : NULL; in imsic_get_global_config()
74 imask = BIT(id & (__riscv_xlen - 1)); in __imsic_eix_read_clear()
102 * are XLEN-wide and we must not touch IDs which in __imsic_eix_update()
106 for (i = id & (__riscv_xlen - 1); id < last_id && i < __riscv_xlen; i++) { in __imsic_eix_update()
133 lockdep_assert_held(&lpriv->lock); in __imsic_local_sync()
135 for_each_set_bit(i, lpriv->dirty_bitmap, imsic->global.nr_ids + 1) { in __imsic_local_sync()
138 vec = &lpriv->vectors[i]; in __imsic_local_sync()
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/linux/arch/x86/kernel/cpu/
H A Dtopology.c1 // SPDX-License-Identifier: GPL-2.0-only
5 * The APIC IDs describe the system topology in multiple domain levels.
11 * The root space contains the package (socket) IDs.
49 u32 cpuid_to_apicid[] __ro_after_init = { [0 ... NR_CPUS - 1] = BAD_APICID, };
80 if (!(apicid & (__max_threads_per_core - 1))) in cpu_mark_primary_thread()
95 return apicid & (UINT_MAX << x86_topo_system.dom_shifts[dom - 1]); in topo_apicid()
107 return -ENODEV; in topo_lookup_cpuid()
231 * of the APICs via firmware parsers or VM guest in topo_register_apic()
246 * on bare metal. Allow the bogosity in a guest. in topo_register_apic()
250 pr_info_once("Ignoring hot-pluggable APIC ID %x in present package.\n", in topo_register_apic()
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/linux/tools/include/uapi/linux/
H A Dvhost.h
/linux/Documentation/networking/device_drivers/ethernet/intel/
H A Diavf.rst1 .. SPDX-License-Identifier: GPL-2.0+
8 Copyright(c) 2013-2018 Intel Corporation.
13 - Overview
14 - Identifying Your Adapter
15 - Additional Configurations
16 - Known Issues/Troubleshooting
17 - Support
30 The guest OS loading the iavf driver must support MSI-X interrupts.
53 ---------------------
58 # dmesg -n 8
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/linux/Documentation/arch/powerpc/
H A Dkvm-nested.rst1 .. SPDX-License-Identifier: GPL-2.0
10 This document explains how a guest operating system can act as a
15 guest virtual machine that is directly run under L0 and is initiated
16 and controlled by L0. L2 is a guest virtual machine that is initiated
36 KVM: PPC: Book3S HV: Nested guest entry via hypercall
44 vCPU (except in the short sequence in the L0 on L1 -> L2 entry and L2
45 -> L1 exit).
74 - L1 and L0 negotiate capabilities with H_GUEST_{G,S}ET_CAPABILITIES()
77 - L1 requests the L0 create an L2 with H_GUEST_CREATE() and receives a token
79 - L1 requests the L0 create an L2 vCPU with H_GUEST_CREATE_VCPU()
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/linux/arch/um/drivers/
H A Dvirtio_uml.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Virtio vhost-user driver
7 * This driver allows virtio devices to be used over a vhost-user socket.
9 * Guest devices can be instantiated by kernel module or command line
14 * <socket> := vhost-user socket path to connect
21 * Based on Virtio MMIO driver by Pawel Moll, copyright 2011-2014, ARM Ltd.
30 #include <linux/time-internal.h>
31 #include <linux/virtio-uml.h>
32 #include <shared/as-layout.h>
76 #define vu_err(vu_dev, ...) dev_err(&(vu_dev)->pdev->dev, ##__VA_ARGS__)
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/linux/arch/mips/include/asm/
H A Dkvm_host.h29 /* MIPS KVM register ids */
102 #define KVM_HVA_ERR_BAD (-1UL)
103 #define KVM_HVA_ERR_RO_BAD (-2UL)
176 /* Guest physical mm */
247 #define RESUME_FLAG_DR (1<<0) /* Reload guest nonvolatile state? */
260 EMULATE_EXCEPT, /* A guest exception has been generated */
265 #define VPN2_MASK GENMASK(cpu_vmbits - 1, 13)
294 /* Host registers preserved across guest mode execution */
300 /* Host CP0 registers used when handling exits from guest */
353 /* wired guest TLB entries */
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/linux/tools/kvm/kvm_stat/
H A Dkvm_stat2 # SPDX-License-Identifier: GPL-2.0-only
4 # top-like utility for displaying kvm statistics
6 # Copyright 2006-2008 Qumranet Technologies
7 # Copyright 2008-2011 Red Hat, Inc.
15 - as a top-like text ui
16 - in a key -> value format
17 - in an all keys, all values format
493 Used to set up performance events, returns a file descriptor or -1
497 - syscall number
498 - struct perf_event_attr *
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/linux/arch/loongarch/kvm/
H A Dvcpu.c1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
7 #include <linux/entry-kvm.h>
39 context = this_cpu_ptr(vcpu->kvm->arch.vmcs); in kvm_save_host_pmu()
40 context->perf_cntr[0] = read_csr_perfcntr0(); in kvm_save_host_pmu()
41 context->perf_cntr[1] = read_csr_perfcntr1(); in kvm_save_host_pmu()
42 context->perf_cntr[2] = read_csr_perfcntr2(); in kvm_save_host_pmu()
43 context->perf_cntr[3] = read_csr_perfcntr3(); in kvm_save_host_pmu()
44 context->perf_ctrl[0] = write_csr_perfctrl0(0); in kvm_save_host_pmu()
45 context->perf_ctrl[1] = write_csr_perfctrl1(0); in kvm_save_host_pmu()
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/linux/include/linux/
H A Dremoteproc.h47 * struct resource_table - firmware resource table header
49 * @num: number of resource entries
75 u32 num; member
81 * struct fw_rsc_hdr - firmware resource entry header
95 * enum fw_resource_type - types of resource entries
99 * @RSC_DEVMEM: request to iommu_map a memory-based peripheral.
126 #define FW_RSC_ADDR_ANY (-1)
129 * struct fw_rsc_carveout - physically contiguous memory request
135 * @name: human-readable name of the requested memory region
181 * struct fw_rsc_devmem - iommu mapping request
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/linux/arch/riscv/kvm/
H A Daia_imsic.c1 // SPDX-License-Identifier: GPL-2.0
12 #include <linux/irqchip/riscv-imsic.h>
44 * 1) Hardware: IMSIC VS-file (vsfile_cpu >= 0)
45 * 2) Software: IMSIC SW-file (vsfile_cpu < 0)
48 /* IMSIC VS-file */
55 /* IMSIC SW-file */
243 imsic_mrif_atomic_rmw(__mrif, __ptr, __new_val, -1UL)
253 &mrif->eithreshold); in imsic_mrif_topei()
258 eix = &mrif->eix[ei]; in imsic_mrif_topei()
259 eipend[0] = imsic_mrif_atomic_read(mrif, &eix->eie[0]) & in imsic_mrif_topei()
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/linux/tools/arch/x86/kcpuid/
H A Dcpuid.csv1 # SPDX-License-Identifier: CC0-1.0
2 # Generator: x86-cpuid-db v1.0
5 # Auto-generated file.
6 # Please submit all updates and bugfixes to https://x86-cpuid.org
16 0, 0, ebx, 31:0, cpu_vendorid_0 , CPU vendor ID string bytes 0 - 3
17 0, 0, ecx, 31:0, cpu_vendorid_2 , CPU vendor ID string bytes 8 - 11
18 0, 0, edx, 31:0, cpu_vendorid_1 , CPU vendor ID string bytes 4 - 7
35 1, 0, ecx, 2, dtes64 , 64-bit DS save area
49 1, 0, ecx, 17, pcid , Process-context identifiers
56 1, 0, ecx, 24, tsc_deadline_timer , APIC timer one-shot operation
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/linux/arch/x86/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0
4 bool "64-bit kernel" if "$(ARCH)" = "x86"
7 Say yes to build a 64-bit kernel - formerly known as x86_64
8 Say no to build a 32-bit kernel - formerly known as i386
13 # Options that are inherently 32-bit kernel only:
27 # Options that are inherently 64-bit kernel only:
55 # ported to 32-bit as well. )
154 # Word-size accesses may read uninitialized data past the trailing \0
336 default "elf32-i386" if X86_32
337 default "elf64-x86-64" if X86_64
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/linux/drivers/net/xen-netback/
H A Dxenbus.c1 // SPDX-License-Identifier: GPL-2.0-or-later
28 struct xenvif_queue *queue = m->private; in xenvif_read_io_ring()
29 struct xen_netif_tx_back_ring *tx_ring = &queue->tx; in xenvif_read_io_ring()
30 struct xen_netif_rx_back_ring *rx_ring = &queue->rx; in xenvif_read_io_ring()
33 if (tx_ring->sring) { in xenvif_read_io_ring()
34 struct xen_netif_tx_sring *sring = tx_ring->sring; in xenvif_read_io_ring()
36 seq_printf(m, "Queue %d\nTX: nr_ents %u\n", queue->id, in xenvif_read_io_ring()
37 tx_ring->nr_ents); in xenvif_read_io_ring()
39 sring->req_prod, in xenvif_read_io_ring()
40 sring->req_prod - sring->rsp_prod, in xenvif_read_io_ring()
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/linux/drivers/block/xen-blkback/
H A Dxenbus.c1 // SPDX-License-Identifier: GPL-2.0-or-later
9 #define pr_fmt(fmt) "xen-blkback: " fmt
18 /* On the XenBus the max length of 'ring-ref%u'. */
40 return be->dev; in xen_blkbk_xenbus()
58 struct xenbus_device *dev = blkif->be->dev; in blkback_name()
60 devpath = xenbus_read(XBT_NIL, dev->nodename, "dev", NULL); in blkback_name()
70 snprintf(buf, TASK_COMM_LEN, "%d.%s", blkif->domid, devname); in blkback_name()
84 if (!blkif->rings || !blkif->rings[0].irq || !blkif->vbd.bdev_file) in xen_update_blkif_status()
88 if (blkif->be->dev->state == XenbusStateConnected) in xen_update_blkif_status()
92 connect(blkif->be); in xen_update_blkif_status()
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/linux/Documentation/admin-guide/
H A Dkernel-parameters.txt16 force -- enable ACPI if default was off
17 on -- enable ACPI but allow fallback to DT [arm64,riscv64]
18 off -- disable ACPI if default was on
19 noirq -- do not use ACPI for IRQ routing
20 strict -- Be less tolerant of platforms that are not
22 rsdt -- prefer RSDT over (default) XSDT
23 copy_dsdt -- copy DSDT to memory
24 nocmcff -- Disable firmware first mode for corrected
28 nospcr -- disable console in ACPI SPCR table as
45 If set to vendor, prefer vendor-specific driver
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/linux/drivers/iommu/arm/arm-smmu-v3/
H A Darm-smmu-v3.c1 // SPDX-License-Identifier: GPL-2.0
19 #include <linux/io-pgtable.h>
27 #include <linux/pci-ats.h>
33 #include "arm-smmu-v3.h"
34 #include "../../dma-iommu.h"
39 "Disable MSI-based polling for CMD_SYNC completion.");
82 { ARM_SMMU_OPT_SKIP_PREFETCH, "hisilicon,broken-prefetch-cmd" },
83 { ARM_SMMU_OPT_PAGE0_REGS_ONLY, "cavium,cn9900-broken-page1-regspace"},
116 if (of_property_read_bool(smmu->dev->of_node, in parse_driver_options()
118 smmu->options |= arm_smmu_options[i].opt; in parse_driver_options()
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/linux/drivers/iommu/intel/
H A Diommu.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright © 2006-2014 Intel Corporation.
17 #include <linux/dma-direct.h>
21 #include <linux/pci-ats.h>
28 #include "../dma-iommu.h"
30 #include "../iommu-pages.h"
37 #define IS_GFX_DEVICE(pdev) ((pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY)
38 #define IS_USB_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_SERIAL_USB)
39 #define IS_ISA_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_BRIDGE_ISA)
40 #define IS_AZALIA(pdev) ((pdev)->vendor == 0x8086 && (pdev)->device == 0x3a3e)
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/linux/drivers/gpu/drm/imagination/
H A Dpvr_rogue_fwif_sf.h1 /* SPDX-License-Identifier: GPL-2.0-only OR MIT */
47 * - --- ---- ---- ---- ---- ---- ---- ----
48 * 0-11: id number
49 * 12-15: group id number
50 * 16-19: number of parameters
51 * 20-27: unused
52 * 28-30: active: identify SF packet, otherwise regular int32
55 * The following macro assigns those values to the enum generated SF ids list.
114 "UFO PR-Check: [0x%08.8x] is 0x%08.8x requires >= 0x%08.8x" },
116 "UFO SPM PR-Checks for FWCtx 0x%08.8x" },
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/linux/drivers/gpu/drm/amd/amdgpu/
H A Dgfx_v10_0.c3681 struct amdgpu_device *adev = kiq_ring->adev; in gfx10_kiq_set_resources()
3685 shader_mc_addr = adev->gfx.cleaner_shader_gpu_addr >> 8; in gfx10_kiq_set_resources()
3701 uint64_t mqd_addr = amdgpu_bo_gpu_offset(ring->mqd_obj); in gfx10_kiq_map_queues()
3702 uint64_t wptr_addr = ring->wptr_gpu_addr; in gfx10_kiq_map_queues()
3705 switch (ring->funcs->type) { in gfx10_kiq_map_queues()
3724 PACKET3_MAP_QUEUES_QUEUE(ring->queue) | in gfx10_kiq_map_queues()
3725 PACKET3_MAP_QUEUES_PIPE(ring->pipe) | in gfx10_kiq_map_queues()
3726 PACKET3_MAP_QUEUES_ME((ring->me == 1 ? 0 : 1)) | in gfx10_kiq_map_queues()
3731 amdgpu_ring_write(kiq_ring, PACKET3_MAP_QUEUES_DOORBELL_OFFSET(ring->doorbell_index)); in gfx10_kiq_map_queues()
3743 uint32_t eng_sel = ring->funcs->type == AMDGPU_RING_TYPE_GFX ? 4 : 0; in gfx10_kiq_unmap_queues()
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