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![Juergen Gross](/assets/img/avatar_default.png)
Commit b24413180f
("License cleanup: add SPDX GPL-2.0 license
identifier to files with no license") was meant to do a tree-wide
cleanup for files without any license information by adding a SPDX
GPL-2.0 line to them.
Unfortunately this was applied even to several Xen-related headers
which have been originally under the MIT license, but obviously have
been copied to the Linux tree from the Xen project without keeping the
license boiler plate as required.
Correct that by changing the license of those files back to "MIT".
Some files still contain the MIT license text. Replace that by the
related SPDX line.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20211015143312.29900-1-jgross@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
206 lines
7.5 KiB
C
206 lines
7.5 KiB
C
/* SPDX-License-Identifier: MIT */
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/******************************************************************************
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* vcpu.h
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*
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* VCPU initialisation, query, and hotplug.
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*
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* Copyright (c) 2005, Keir Fraser <keir@xensource.com>
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*/
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#ifndef __XEN_PUBLIC_VCPU_H__
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#define __XEN_PUBLIC_VCPU_H__
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/*
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* Prototype for this hypercall is:
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* int vcpu_op(int cmd, int vcpuid, void *extra_args)
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* @cmd == VCPUOP_??? (VCPU operation).
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* @vcpuid == VCPU to operate on.
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* @extra_args == Operation-specific extra arguments (NULL if none).
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*/
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/*
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* Initialise a VCPU. Each VCPU can be initialised only once. A
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* newly-initialised VCPU will not run until it is brought up by VCPUOP_up.
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*
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* @extra_arg == pointer to vcpu_guest_context structure containing initial
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* state for the VCPU.
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*/
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#define VCPUOP_initialise 0
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/*
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* Bring up a VCPU. This makes the VCPU runnable. This operation will fail
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* if the VCPU has not been initialised (VCPUOP_initialise).
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*/
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#define VCPUOP_up 1
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/*
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* Bring down a VCPU (i.e., make it non-runnable).
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* There are a few caveats that callers should observe:
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* 1. This operation may return, and VCPU_is_up may return false, before the
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* VCPU stops running (i.e., the command is asynchronous). It is a good
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* idea to ensure that the VCPU has entered a non-critical loop before
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* bringing it down. Alternatively, this operation is guaranteed
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* synchronous if invoked by the VCPU itself.
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* 2. After a VCPU is initialised, there is currently no way to drop all its
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* references to domain memory. Even a VCPU that is down still holds
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* memory references via its pagetable base pointer and GDT. It is good
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* practise to move a VCPU onto an 'idle' or default page table, LDT and
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* GDT before bringing it down.
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*/
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#define VCPUOP_down 2
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/* Returns 1 if the given VCPU is up. */
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#define VCPUOP_is_up 3
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/*
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* Return information about the state and running time of a VCPU.
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* @extra_arg == pointer to vcpu_runstate_info structure.
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*/
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#define VCPUOP_get_runstate_info 4
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struct vcpu_runstate_info {
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/* VCPU's current state (RUNSTATE_*). */
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int state;
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/* When was current state entered (system time, ns)? */
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uint64_t state_entry_time;
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/*
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* Update indicator set in state_entry_time:
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* When activated via VMASST_TYPE_runstate_update_flag, set during
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* updates in guest memory mapped copy of vcpu_runstate_info.
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*/
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#define XEN_RUNSTATE_UPDATE (1ULL << 63)
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/*
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* Time spent in each RUNSTATE_* (ns). The sum of these times is
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* guaranteed not to drift from system time.
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*/
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uint64_t time[4];
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};
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DEFINE_GUEST_HANDLE_STRUCT(vcpu_runstate_info);
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/* VCPU is currently running on a physical CPU. */
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#define RUNSTATE_running 0
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/* VCPU is runnable, but not currently scheduled on any physical CPU. */
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#define RUNSTATE_runnable 1
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/* VCPU is blocked (a.k.a. idle). It is therefore not runnable. */
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#define RUNSTATE_blocked 2
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/*
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* VCPU is not runnable, but it is not blocked.
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* This is a 'catch all' state for things like hotplug and pauses by the
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* system administrator (or for critical sections in the hypervisor).
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* RUNSTATE_blocked dominates this state (it is the preferred state).
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*/
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#define RUNSTATE_offline 3
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/*
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* Register a shared memory area from which the guest may obtain its own
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* runstate information without needing to execute a hypercall.
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* Notes:
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* 1. The registered address may be virtual or physical, depending on the
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* platform. The virtual address should be registered on x86 systems.
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* 2. Only one shared area may be registered per VCPU. The shared area is
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* updated by the hypervisor each time the VCPU is scheduled. Thus
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* runstate.state will always be RUNSTATE_running and
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* runstate.state_entry_time will indicate the system time at which the
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* VCPU was last scheduled to run.
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* @extra_arg == pointer to vcpu_register_runstate_memory_area structure.
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*/
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#define VCPUOP_register_runstate_memory_area 5
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struct vcpu_register_runstate_memory_area {
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union {
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GUEST_HANDLE(vcpu_runstate_info) h;
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struct vcpu_runstate_info *v;
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uint64_t p;
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} addr;
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};
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/*
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* Set or stop a VCPU's periodic timer. Every VCPU has one periodic timer
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* which can be set via these commands. Periods smaller than one millisecond
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* may not be supported.
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*/
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#define VCPUOP_set_periodic_timer 6 /* arg == vcpu_set_periodic_timer_t */
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#define VCPUOP_stop_periodic_timer 7 /* arg == NULL */
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struct vcpu_set_periodic_timer {
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uint64_t period_ns;
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};
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DEFINE_GUEST_HANDLE_STRUCT(vcpu_set_periodic_timer);
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/*
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* Set or stop a VCPU's single-shot timer. Every VCPU has one single-shot
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* timer which can be set via these commands.
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*/
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#define VCPUOP_set_singleshot_timer 8 /* arg == vcpu_set_singleshot_timer_t */
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#define VCPUOP_stop_singleshot_timer 9 /* arg == NULL */
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struct vcpu_set_singleshot_timer {
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uint64_t timeout_abs_ns;
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uint32_t flags; /* VCPU_SSHOTTMR_??? */
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};
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DEFINE_GUEST_HANDLE_STRUCT(vcpu_set_singleshot_timer);
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/* Flags to VCPUOP_set_singleshot_timer. */
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/* Require the timeout to be in the future (return -ETIME if it's passed). */
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#define _VCPU_SSHOTTMR_future (0)
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#define VCPU_SSHOTTMR_future (1U << _VCPU_SSHOTTMR_future)
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/*
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* Register a memory location in the guest address space for the
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* vcpu_info structure. This allows the guest to place the vcpu_info
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* structure in a convenient place, such as in a per-cpu data area.
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* The pointer need not be page aligned, but the structure must not
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* cross a page boundary.
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*/
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#define VCPUOP_register_vcpu_info 10 /* arg == struct vcpu_info */
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struct vcpu_register_vcpu_info {
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uint64_t mfn; /* mfn of page to place vcpu_info */
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uint32_t offset; /* offset within page */
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uint32_t rsvd; /* unused */
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};
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DEFINE_GUEST_HANDLE_STRUCT(vcpu_register_vcpu_info);
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/* Send an NMI to the specified VCPU. @extra_arg == NULL. */
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#define VCPUOP_send_nmi 11
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/*
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* Get the physical ID information for a pinned vcpu's underlying physical
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* processor. The physical ID informmation is architecture-specific.
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* On x86: id[31:0]=apic_id, id[63:32]=acpi_id.
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* This command returns -EINVAL if it is not a valid operation for this VCPU.
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*/
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#define VCPUOP_get_physid 12 /* arg == vcpu_get_physid_t */
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struct vcpu_get_physid {
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uint64_t phys_id;
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};
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DEFINE_GUEST_HANDLE_STRUCT(vcpu_get_physid);
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#define xen_vcpu_physid_to_x86_apicid(physid) ((uint32_t)(physid))
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#define xen_vcpu_physid_to_x86_acpiid(physid) ((uint32_t)((physid) >> 32))
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/*
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* Register a memory location to get a secondary copy of the vcpu time
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* parameters. The master copy still exists as part of the vcpu shared
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* memory area, and this secondary copy is updated whenever the master copy
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* is updated (and using the same versioning scheme for synchronisation).
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*
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* The intent is that this copy may be mapped (RO) into userspace so
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* that usermode can compute system time using the time info and the
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* tsc. Usermode will see an array of vcpu_time_info structures, one
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* for each vcpu, and choose the right one by an existing mechanism
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* which allows it to get the current vcpu number (such as via a
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* segment limit). It can then apply the normal algorithm to compute
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* system time from the tsc.
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*
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* @extra_arg == pointer to vcpu_register_time_info_memory_area structure.
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*/
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#define VCPUOP_register_vcpu_time_memory_area 13
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DEFINE_GUEST_HANDLE_STRUCT(vcpu_time_info);
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struct vcpu_register_time_memory_area {
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union {
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GUEST_HANDLE(vcpu_time_info) h;
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struct pvclock_vcpu_time_info *v;
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uint64_t p;
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} addr;
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};
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DEFINE_GUEST_HANDLE_STRUCT(vcpu_register_time_memory_area);
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#endif /* __XEN_PUBLIC_VCPU_H__ */
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