> Subject: [PATCH 03/17] board: Introduce xenguest_arm64 board > > From: Andrii Anisov <andrii_ani...@epam.com> > > Introduce a minimal Xen guest board running as a virtual machine under Xen > Project's hypervisor [1], [2]. > > Part of the code is ported from Xen mini-os and also uses work initially done > by different authors from NXP: please see relevant files for their copyrights.
This patch needs to be in the last, otherwise it might break git bisect. > > [1] > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fxenbit > s.xen.org%2F&data=02%7C01%7Cpeng.fan%40nxp.com%7C61151b8230 > c94f145ce408d81ddc04ee%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0% > 7C0%7C637292178110014498&sdata=pgJ6Qf1iDW%2FjNWTcGBWFVYY > SrG0MX%2FiTzbfzbyqkxsY%3D&reserved=0 > [2] > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwiki.xe > nproject.org%2F&data=02%7C01%7Cpeng.fan%40nxp.com%7C61151b8 > 230c94f145ce408d81ddc04ee%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C > 0%7C0%7C637292178110014498&sdata=x0gKBoJvFRQdX7YatAhgF%2Fc > ovJ4kdrmbl2iUiXvCqww%3D&reserved=0 > > Signed-off-by: Andrii Anisov <andrii_ani...@epam.com> > Signed-off-by: Oleksandr Andrushchenko > <oleksandr_andrushche...@epam.com> > Signed-off-by: Anastasiia Lukianenko <anastasiia_lukiane...@epam.com> > --- > arch/arm/Kconfig | 7 + > arch/arm/cpu/armv8/Makefile | 1 + > arch/arm/cpu/armv8/xen/Makefile | 6 + > arch/arm/cpu/armv8/xen/hypercall.S | 78 +++++++++++ > arch/arm/cpu/armv8/xen/lowlevel_init.S | 34 +++++ > arch/arm/include/asm/xen.h | 8 ++ > arch/arm/include/asm/xen/hypercall.h | 45 +++++++ > board/xen/xenguest_arm64/Kconfig | 12 ++ > board/xen/xenguest_arm64/Makefile | 5 + > board/xen/xenguest_arm64/xenguest_arm64.c | 153 > ++++++++++++++++++++++ > configs/xenguest_arm64_defconfig | 56 ++++++++ > include/configs/xenguest_arm64.h | 45 +++++++ > 12 files changed, 450 insertions(+) > create mode 100644 arch/arm/cpu/armv8/xen/Makefile create mode > 100644 arch/arm/cpu/armv8/xen/hypercall.S > create mode 100644 arch/arm/cpu/armv8/xen/lowlevel_init.S > create mode 100644 arch/arm/include/asm/xen.h create mode 100644 > arch/arm/include/asm/xen/hypercall.h > create mode 100644 board/xen/xenguest_arm64/Kconfig create mode > 100644 board/xen/xenguest_arm64/Makefile create mode 100644 > board/xen/xenguest_arm64/xenguest_arm64.c > create mode 100644 configs/xenguest_arm64_defconfig create mode > 100644 include/configs/xenguest_arm64.h > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index > e9ad716aaa..c469863967 100644 > --- a/arch/arm/Kconfig > +++ b/arch/arm/Kconfig > @@ -1717,6 +1717,12 @@ config TARGET_PRESIDIO_ASIC > bool "Support Cortina Presidio ASIC Platform" > select ARM64 > > +config TARGET_XENGUEST_ARM64 > + bool "Xen guest ARM64" > + select ARM64 > + select XEN > + select OF_CONTROL > + select LINUX_KERNEL_IMAGE_HEADER > endchoice > > config ARCH_SUPPORT_TFABOOT > @@ -1920,6 +1926,7 @@ source "board/xilinx/Kconfig" > source "board/xilinx/zynq/Kconfig" > source "board/xilinx/zynqmp/Kconfig" > source "board/phytium/durian/Kconfig" > +source "board/xen/xenguest_arm64/Kconfig" > > source "arch/arm/Kconfig.debug" > > diff --git a/arch/arm/cpu/armv8/Makefile b/arch/arm/cpu/armv8/Makefile > index 2e48df0eb9..dd6c354d19 100644 > --- a/arch/arm/cpu/armv8/Makefile > +++ b/arch/arm/cpu/armv8/Makefile > @@ -39,3 +39,4 @@ obj-$(CONFIG_S32V234) += s32v234/ > obj-$(CONFIG_TARGET_HIKEY) += hisilicon/ > obj-$(CONFIG_ARMV8_PSCI) += psci.o > obj-$(CONFIG_ARCH_SUNXI) += lowlevel_init.o > +obj-$(CONFIG_XEN) += xen/ > diff --git a/arch/arm/cpu/armv8/xen/Makefile > b/arch/arm/cpu/armv8/xen/Makefile new file mode 100644 index > 0000000000..e3b4ae2bd4 > --- /dev/null > +++ b/arch/arm/cpu/armv8/xen/Makefile > @@ -0,0 +1,6 @@ > +# SPDX-License-Identifier: GPL-2.0+ > +# > +# (C) 2018 NXP > +# (C) 2020 EPAM Systems Inc. > + > +obj-y += lowlevel_init.o hypercall.o > diff --git a/arch/arm/cpu/armv8/xen/hypercall.S > b/arch/arm/cpu/armv8/xen/hypercall.S > new file mode 100644 > index 0000000000..9596e336b5 > --- /dev/null > +++ b/arch/arm/cpu/armv8/xen/hypercall.S > @@ -0,0 +1,78 @@ > +/************************************************************ > ********** > +******** > + * hypercall.S > + * > + * Xen hypercall wrappers > + * > + * Stefano Stabellini <stefano.stabell...@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 <xen/interface/xen.h> > + > +#define XEN_HYPERCALL_TAG 0xEA1 > + > +#define HYPERCALL_SIMPLE(hypercall) \ > +.globl HYPERVISOR_##hypercall; \ > +.align 4,0x90; \ > +HYPERVISOR_##hypercall: \ > + mov x16, #__HYPERVISOR_##hypercall; \ > + hvc XEN_HYPERCALL_TAG; \ > + ret; \ > + > +#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); > + > diff --git a/arch/arm/cpu/armv8/xen/lowlevel_init.S > b/arch/arm/cpu/armv8/xen/lowlevel_init.S > new file mode 100644 > index 0000000000..25ed438e20 > --- /dev/null > +++ b/arch/arm/cpu/armv8/xen/lowlevel_init.S > @@ -0,0 +1,34 @@ > +/* > + * SPDX-License-Identifier: GPL-2.0+ > + * > + * (C) 2017 NXP > + * (C) 2020 EPAM Systems Inc. > + */ > + > +#include <config.h> > + > +.align 8 > +.global rom_pointer > +rom_pointer: > + .space 32 > + > +/* > + * Routine: save_boot_params (called after reset from start.S) */ > + > +.global save_boot_params > +save_boot_params: > + /* The firmware provided ATAG/FDT address can be found in r2/x0 */ > + adr x1, rom_pointer > + stp x0, x2, [x1], #16 > + stp x3, x4, [x1], #16 > + > + /* Returns */ > + b save_boot_params_ret > + > +.global restore_boot_params > +restore_boot_params: > + adr x1, rom_pointer > + ldp x0, x2, [x1], #16 > + ldp x3, x4, [x1], #16 > + ret > diff --git a/arch/arm/include/asm/xen.h b/arch/arm/include/asm/xen.h new > file mode 100644 index 0000000000..fb7f03e19c > --- /dev/null > +++ b/arch/arm/include/asm/xen.h > @@ -0,0 +1,8 @@ > +/* > + * SPDX-License-Identifier: GPL-2.0+ > + * > + * (C) 2020 EPAM Systems Inc. > + */ > + > +extern unsigned long rom_pointer[]; > + > diff --git a/arch/arm/include/asm/xen/hypercall.h > b/arch/arm/include/asm/xen/hypercall.h > new file mode 100644 > index 0000000000..26644ce886 > --- /dev/null > +++ b/arch/arm/include/asm/xen/hypercall.h > @@ -0,0 +1,45 @@ > +/************************************************************ > ********** > +******** > + * hypercall.h > + * > + * Linux-specific hypervisor handling. > + * > + * Stefano Stabellini <stefano.stabell...@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. > + */ > + > +#ifndef _ASM_ARM_XEN_HYPERCALL_H > +#define _ASM_ARM_XEN_HYPERCALL_H > + > +#include <xen/interface/xen.h> > + > +int HYPERVISOR_xen_version(int cmd, void *arg); int > +HYPERVISOR_console_io(int cmd, int count, char *str); int > +HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int > +count); int HYPERVISOR_sched_op(int cmd, void *arg); int > +HYPERVISOR_event_channel_op(int cmd, void *arg); unsigned long > +HYPERVISOR_hvm_op(int op, void *arg); int > HYPERVISOR_memory_op(unsigned > +int cmd, void *arg); #endif /* _ASM_ARM_XEN_HYPERCALL_H */ > diff --git a/board/xen/xenguest_arm64/Kconfig > b/board/xen/xenguest_arm64/Kconfig > new file mode 100644 > index 0000000000..cc131ed5b9 > --- /dev/null > +++ b/board/xen/xenguest_arm64/Kconfig > @@ -0,0 +1,12 @@ > +if TARGET_XENGUEST_ARM64 > + > +config SYS_BOARD > + default "xenguest_arm64" > + > +config SYS_VENDOR > + default "xen" > + > +config SYS_CONFIG_NAME > + default "xenguest_arm64" > + > +endif > diff --git a/board/xen/xenguest_arm64/Makefile > b/board/xen/xenguest_arm64/Makefile > new file mode 100644 > index 0000000000..1cf87a728f > --- /dev/null > +++ b/board/xen/xenguest_arm64/Makefile > @@ -0,0 +1,5 @@ > +# SPDX-License-Identifier: GPL-2.0+ > +# > +# (C) Copyright 2020 EPAM Systems Inc. > + > +obj-y := xenguest_arm64.o > diff --git a/board/xen/xenguest_arm64/xenguest_arm64.c > b/board/xen/xenguest_arm64/xenguest_arm64.c > new file mode 100644 > index 0000000000..9e099f388f > --- /dev/null > +++ b/board/xen/xenguest_arm64/xenguest_arm64.c > @@ -0,0 +1,153 @@ > +/* > + * SPDX-License-Identifier: GPL-2.0+ > + * > + * (C) 2013 > + * David Feng <feng...@phytium.com.cn> > + * Sharma Bhupesh <bhupesh.sha...@freescale.com> > + * > + * (C) 2020 EPAM Systems Inc > + */ > + > +#include <common.h> > +#include <cpu_func.h> > +#include <dm.h> > +#include <errno.h> > +#include <malloc.h> > + > +#include <asm/io.h> > +#include <asm/armv8/mmu.h> > +#include <asm/xen.h> > +#include <asm/xen/hypercall.h> > + > +#include <linux/compiler.h> > + > +DECLARE_GLOBAL_DATA_PTR; > + > +int board_init(void) > +{ > + return 0; > +} > + > +/* > + * Use fdt provided by Xen: according to > + * > +https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww > .k > +ernel.org%2Fdoc%2FDocumentation%2Farm64%2Fbooting.txt&data=0 > 2%7C01% > +7Cpeng.fan%40nxp.com%7C61151b8230c94f145ce408d81ddc04ee%7C686 > ea1d3bc2b4 > +c6fa92cd99c5c301635%7C0%7C0%7C637292178110014498&sdata=3t > i9j4nAzNSw > +xsmZs8rONDmPLNbGx89HYBsezkgD%2FVI%3D&reserved=0 > + * x0 is the physical address of the device tree blob (dtb) in system RAM. > + * This is stored in rom_pointer during low level init. > + */ > +void *board_fdt_blob_setup(void) > +{ > + if (fdt_magic(rom_pointer[0]) != FDT_MAGIC) > + return NULL; > + return (void *)rom_pointer[0]; > +} > + > +#define MAX_MEM_MAP_REGIONS 5 > +static struct mm_region xen_mem_map[MAX_MEM_MAP_REGIONS]; struct > +mm_region *mem_map = xen_mem_map; > + > +static int get_next_memory_node(const void *blob, int mem) { > + do { > + mem = fdt_node_offset_by_prop_value(blob, mem, > + "device_type", "memory", 7); > + } while (!fdtdec_get_is_enabled(blob, mem)); > + > + return mem; > +} > + > +static int setup_mem_map(void) > +{ > + int i, ret, mem, reg = 0; > + struct fdt_resource res; > + const void *blob = gd->fdt_blob; > + > + mem = get_next_memory_node(blob, -1); > + if (mem < 0) { > + printf("%s: Missing /memory node\n", __func__); > + return -EINVAL; > + } > + > + for (i = 0; i < MAX_MEM_MAP_REGIONS; i++) { > + ret = fdt_get_resource(blob, mem, "reg", reg++, &res); > + if (ret == -FDT_ERR_NOTFOUND) { > + reg = 0; > + mem = get_next_memory_node(blob, mem); > + if (mem == -FDT_ERR_NOTFOUND) > + break; > + > + ret = fdt_get_resource(blob, mem, "reg", reg++, &res); > + if (ret == -FDT_ERR_NOTFOUND) > + break; > + } > + if (ret != 0) { > + printf("No reg property for memory node\n"); > + return -EINVAL; > + } > + > + xen_mem_map[i].virt = (phys_addr_t)res.start; > + xen_mem_map[i].phys = (phys_addr_t)res.start; > + xen_mem_map[i].size = (phys_size_t)(res.end - res.start + 1); > + xen_mem_map[i].attrs = (PTE_BLOCK_MEMTYPE(MT_NORMAL) | > + PTE_BLOCK_INNER_SHARE); > + } > + return 0; > +} > + > +void enable_caches(void) > +{ > + /* Re-setup the memory map as BSS gets cleared after relocation. */ > + setup_mem_map(); > + icache_enable(); > + dcache_enable(); > +} > + > +/* Read memory settings from the Xen provided device tree. */ int > +dram_init(void) { > + int ret; > + > + ret = fdtdec_setup_mem_size_base(); > + if (ret < 0) > + return ret; > + /* Setup memory map, so MMU page table size can be estimated. */ > + return setup_mem_map(); > +} > + > +int dram_init_banksize(void) > +{ > + return fdtdec_setup_memory_banksize(); } > + > +/* > + * Board specific reset that is system reset. > + */ > +void reset_cpu(ulong addr) > +{ > +} > + > +int ft_system_setup(void *blob, bd_t *bd) { > + return 0; > +} > + > +int ft_board_setup(void *blob, bd_t *bd) { > + return 0; > +} > + > +int board_early_init_f(void) > +{ > + return 0; > +} Drop the upper three functions if not needed. > + > +int print_cpuinfo(void) > +{ > + printf("Xen virtual CPU\n"); > + return 0; > +} > + > +__weak struct serial_device *default_serial_console(void) { > + return NULL; > +} > + > diff --git a/configs/xenguest_arm64_defconfig > b/configs/xenguest_arm64_defconfig > new file mode 100644 > index 0000000000..2a8caf8647 > --- /dev/null > +++ b/configs/xenguest_arm64_defconfig > @@ -0,0 +1,56 @@ > +CONFIG_ARM=y > +CONFIG_POSITION_INDEPENDENT=y > +CONFIG_SYS_TEXT_BASE=0x40080000 > +CONFIG_SYS_MALLOC_F_LEN=0x2000 > +CONFIG_IDENT_STRING=" xenguest" > +CONFIG_TARGET_XENGUEST_ARM64=y > +CONFIG_BOOTDELAY=10 10s? Regards, Peng. > + > +CONFIG_SYS_PROMPT="xenguest# " > + > +CONFIG_CMD_NET=n > +CONFIG_CMD_BDI=n > +CONFIG_CMD_BOOTD=n > +CONFIG_CMD_BOOTEFI=n > +CONFIG_CMD_BOOTEFI_HELLO_COMPILE=n > +CONFIG_CMD_ELF=n > +CONFIG_CMD_GO=n > +CONFIG_CMD_RUN=n > +CONFIG_CMD_IMI=n > +CONFIG_CMD_IMLS=n > +CONFIG_CMD_XIMG=n > +CONFIG_CMD_EXPORTENV=n > +CONFIG_CMD_IMPORTENV=n > +CONFIG_CMD_EDITENV=n > +CONFIG_CMD_ENV_EXISTS=n > +CONFIG_CMD_MEMORY=y > +CONFIG_CMD_CRC32=n > +CONFIG_CMD_DM=n > +CONFIG_CMD_LOADB=n > +CONFIG_CMD_LOADS=n > +CONFIG_CMD_FLASH=n > +CONFIG_CMD_GPT=n > +CONFIG_CMD_FPGA=n > +CONFIG_CMD_ECHO=n > +CONFIG_CMD_ITEST=n > +CONFIG_CMD_SOURCE=n > +CONFIG_CMD_SETEXPR=n > +CONFIG_CMD_MISC=n > +CONFIG_CMD_UNZIP=n > +CONFIG_CMD_LZMADEC=n > +CONFIG_CMD_SAVEENV=n > +CONFIG_CMD_UMS=n > + > +#CONFIG_USB=n > +# CONFIG_ISO_PARTITION is not set > + > +#CONFIG_EFI_PARTITION=y > +# CONFIG_EFI_LOADER is not set > + > +# CONFIG_DM is not set > +# CONFIG_MMC is not set > +# CONFIG_DM_SERIAL is not set > +# CONFIG_REQUIRE_SERIAL_CONSOLE is not set > + > +CONFIG_OF_BOARD=y > +CONFIG_OF_LIBFDT=y > diff --git a/include/configs/xenguest_arm64.h > b/include/configs/xenguest_arm64.h > new file mode 100644 > index 0000000000..467dabf1e5 > --- /dev/null > +++ b/include/configs/xenguest_arm64.h > @@ -0,0 +1,45 @@ > +/* > + * SPDX-License-Identifier: GPL-2.0+ > + * > + * (C) Copyright 2020 EPAM Systemc Inc. > + */ > +#ifndef __XENGUEST_ARM64_H > +#define __XENGUEST_ARM64_H > + > +#ifndef __ASSEMBLY__ > +#include <linux/types.h> > +#endif > + > +#define CONFIG_BOARD_EARLY_INIT_F > + > +#define CONFIG_EXTRA_ENV_SETTINGS > + > +#undef CONFIG_NR_DRAM_BANKS > +#undef CONFIG_SYS_SDRAM_BASE > + > +#define CONFIG_NR_DRAM_BANKS 1 > + > +/* > + * This can be any arbitrary address as we are using PIE, but > + * please note, that CONFIG_SYS_TEXT_BASE must match the below. > + */ > +#define CONFIG_SYS_LOAD_ADDR 0x40000000 > +#define CONFIG_LNX_KRNL_IMG_TEXT_OFFSET_BASE > CONFIG_SYS_LOAD_ADDR > + > +/* Size of malloc() pool */ > +#define CONFIG_SYS_MALLOC_LEN (32 * 1024 * 1024) > + > +/* Monitor Command Prompt */ > +#define CONFIG_SYS_PROMPT_HUSH_PS2 "> " > +#define CONFIG_SYS_CBSIZE 1024 > +#define CONFIG_SYS_MAXARGS 64 > +#define CONFIG_SYS_BARGSIZE CONFIG_SYS_CBSIZE > +#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + \ > + sizeof(CONFIG_SYS_PROMPT) + 16) > + > +#define CONFIG_OF_SYSTEM_SETUP > + > +#define CONFIG_CMDLINE_TAG 1 > +#define CONFIG_INITRD_TAG 1 > + > +#endif /* __XENGUEST_ARM64_H */ > -- > 2.17.1
