Differential D30996 Diff 91648 sys/arm64/xen/hypercall.S

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sys/arm64/xen/hypercall.S

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				/******************************************************************************
				* hypercall.S
				*
				impUnsubmitted Done Inline Actions `GPL-2.0` is deprecated and should not be used SPDX-License-Identifier: MIT OR GPL-2.0-only is the correct way to flag this. imp: `GPL-2.0` is deprecated and should not be used ``` SPDX-License-Identifier: MIT OR GPL-2.0…
				* Xen hypercall wrappers
				*
				* Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Citrix, 2012
				*
				* This program is free software; you can redistribute it and/or
				* modify it under the terms of the GNU General Public License version 2
				* as published by the Free Software Foundation; or, when distributed
				* separately from the Linux kernel or incorporated into other
				* software packages, subject to the following license:
				*
				* Permission is hereby granted, free of charge, to any person obtaining a copy
				kevansUnsubmitted Done Inline Actions This looks like MIT; we probably want an SPDX tag at the top of this file? I reckon: `SPDX-License-Identifier: MIT`OR GPL-2.0 kevans: This looks like MIT; we probably want an SPDX tag at the top of this file? I reckon: `SPDX…
				* of this source file (the "Software"), to deal in the Software without
				* restriction, including without limitation the rights to use, copy, modify,
				* merge, publish, distribute, sublicense, and/or sell copies of the Software,
				* and to permit persons to whom the Software is furnished to do so, subject to
				* the following conditions:
				*
				* The above copyright notice and this permission notice shall be included in
				* all copies or substantial portions of the Software.
				*
				* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
				* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
				* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
				* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
				* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
				* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
				* IN THE SOFTWARE.
				*/

				/*
				* The Xen hypercall calling convention is very similar to the procedure
				* call standard for the ARM 64-bit architecture: the first parameter is
				* passed in x0, the second in x1, the third in x2, the fourth in x3 and
				* the fifth in x4.
				*
				* The hypercall number is passed in x16.
				*
				* The return value is in x0.
				*
				* The hvc ISS is required to be 0xEA1, that is the Xen specific ARM
				* hypercall tag.
				*
				* Parameter structs passed to hypercalls are laid out according to
				* the ARM 64-bit EABI standard.
				*/

				#include <machine/asm.h>
				#include <xen/xen-os.h>
				__FBSDID("$FreeBSD$");

				#define XEN_IMM 0xEA1

				#define HYPERCALL_SIMPLE(hypercall) \
				ENTRY(HYPERVISOR_##hypercall); \
				mov x16, #__HYPERVISOR_##hypercall; \
				hvc XEN_IMM; \
				ret; \
				END(HYPERVISOR_##hypercall)

				#define HYPERCALL0 HYPERCALL_SIMPLE
				#define HYPERCALL1 HYPERCALL_SIMPLE
				#define HYPERCALL2 HYPERCALL_SIMPLE
				#define HYPERCALL3 HYPERCALL_SIMPLE
				#define HYPERCALL4 HYPERCALL_SIMPLE
				#define HYPERCALL5 HYPERCALL_SIMPLE

				.text

				HYPERCALL2(xen_version);
				HYPERCALL3(console_io);
				HYPERCALL3(grant_table_op);
				HYPERCALL2(sched_op);
				HYPERCALL2(event_channel_op);
				HYPERCALL2(hvm_op);
				HYPERCALL2(memory_op);
				HYPERCALL2(physdev_op);
				HYPERCALL3(vcpu_op);
				HYPERCALL1(tmem_op);
				HYPERCALL1(platform_op);
				HYPERCALL2(multicall);
				HYPERCALL3(dm_op);

				ENTRY(privcmd_hypercall)
				mov x16, x0
				mov x0, x1
				mov x1, x2
				mov x2, x3
				mov x3, x4
				mov x4, x5
				hvc XEN_IMM
				ret
				END(privcmd_call);