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ab520be8cd
Recently a new dm_op[1] hypercall was added to Xen to provide a mechanism
for restricting device emulators (such as QEMU) to a limited set of
hypervisor operations, and being able to audit those operations in the
kernel of the domain in which they run.
This patch adds IOCTL_PRIVCMD_DM_OP as gateway for __HYPERVISOR_dm_op.
NOTE: There is no requirement for user-space code to bounce data through
locked memory buffers (as with IOCTL_PRIVCMD_HYPERCALL) since
privcmd has enough information to lock the original buffers
directly.
[1] http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=524a98c2
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
89 lines
3.3 KiB
C
89 lines
3.3 KiB
C
/******************************************************************************
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* hypercall.h
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*
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* Linux-specific hypervisor handling.
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*
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* Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Citrix, 2012
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation; or, when distributed
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* separately from the Linux kernel or incorporated into other
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* software packages, subject to the following license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this source file (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy, modify,
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* merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef _ASM_ARM_XEN_HYPERCALL_H
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#define _ASM_ARM_XEN_HYPERCALL_H
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#include <linux/bug.h>
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#include <xen/interface/xen.h>
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#include <xen/interface/sched.h>
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#include <xen/interface/platform.h>
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long privcmd_call(unsigned call, unsigned long a1,
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unsigned long a2, unsigned long a3,
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unsigned long a4, unsigned long a5);
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int HYPERVISOR_xen_version(int cmd, void *arg);
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int HYPERVISOR_console_io(int cmd, int count, char *str);
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int HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count);
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int HYPERVISOR_sched_op(int cmd, void *arg);
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int HYPERVISOR_event_channel_op(int cmd, void *arg);
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unsigned long HYPERVISOR_hvm_op(int op, void *arg);
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int HYPERVISOR_memory_op(unsigned int cmd, void *arg);
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int HYPERVISOR_physdev_op(int cmd, void *arg);
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int HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args);
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int HYPERVISOR_tmem_op(void *arg);
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int HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type);
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int HYPERVISOR_dm_op(domid_t domid, unsigned int nr_bufs, void *bufs);
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int HYPERVISOR_platform_op_raw(void *arg);
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static inline int HYPERVISOR_platform_op(struct xen_platform_op *op)
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{
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op->interface_version = XENPF_INTERFACE_VERSION;
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return HYPERVISOR_platform_op_raw(op);
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}
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int HYPERVISOR_multicall(struct multicall_entry *calls, uint32_t nr);
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static inline int
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HYPERVISOR_suspend(unsigned long start_info_mfn)
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{
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struct sched_shutdown r = { .reason = SHUTDOWN_suspend };
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/* start_info_mfn is unused on ARM */
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return HYPERVISOR_sched_op(SCHEDOP_shutdown, &r);
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}
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static inline void
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MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
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unsigned int new_val, unsigned long flags)
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{
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BUG();
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}
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static inline void
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MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
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int count, int *success_count, domid_t domid)
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{
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BUG();
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}
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#endif /* _ASM_ARM_XEN_HYPERCALL_H */
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