arm64/xen: introduce CONFIG_XEN and hypercall.S on ARM64 (aa42aa13) · Commits · 戴 / test

arch/arm64/Kconfig

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		@@ -182,6 +182,16 @@ config HW_PERF_EVENTS

		source "mm/Kconfig"

		config XEN_DOM0
		def_bool y
		depends on XEN

		config XEN
		bool "Xen guest support on ARM64 (EXPERIMENTAL)"
		depends on ARM64 && OF
		help
		Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.

		endmenu

		menu "Boot options"

arch/arm64/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -37,6 +37,7 @@ TEXT_OFFSET := 0x00080000
		export TEXT_OFFSET GZFLAGS

		core-y += arch/arm64/kernel/ arch/arm64/mm/
		core-$(CONFIG_XEN) += arch/arm64/xen/
		libs-y := arch/arm64/lib/ $(libs-y)
		libs-y += $(LIBGCC)

arch/arm64/xen/Makefile

0 → 100644

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		xen-arm-y += $(addprefix ../../arm/xen/, enlighten.o grant-table.o)
		obj-y := xen-arm.o hypercall.o

arch/arm64/xen/hypercall.S

0 → 100644

+92 −0

Original line number	Diff line number	Diff line
		/******************************************************************************
		* hypercall.S
		*
		* 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
		* 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 <linux/linkage.h>
		#include <asm/assembler.h>
		#include <xen/interface/xen.h>


		#define XEN_IMM 0xEA1

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

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

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