forked from luck/tmp_suning_uos_patched
powerpc/kexec_file: Mark PPC64 specific code
Some of the kexec_file_load code isn't PPC64 specific. Move PPC64 specific code from kexec/file_load.c to kexec/file_load_64.c. Also, rename purgatory/trampoline.S to purgatory/trampoline_64.S in the same spirit. No functional changes. Signed-off-by: Hari Bathini <hbathini@linux.ibm.com> Tested-by: Pingfan Liu <piliu@redhat.com> Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com> Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/159602276920.575379.10390965946438306388.stgit@hbathini
This commit is contained in:
Hari Bathini
Michael Ellerman
parent
f891f19736
commit
19031275a5
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@ -116,6 +116,15 @@ int setup_new_fdt(const struct kimage *image, void *fdt,
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unsigned long initrd_load_addr, unsigned long initrd_len,
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const char *cmdline);
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int delete_fdt_mem_rsv(void *fdt, unsigned long start, unsigned long size);
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#ifdef CONFIG_PPC64
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int setup_purgatory_ppc64(struct kimage *image, const void *slave_code,
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const void *fdt, unsigned long kernel_load_addr,
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unsigned long fdt_load_addr);
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int setup_new_fdt_ppc64(const struct kimage *image, void *fdt,
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unsigned long initrd_load_addr,
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unsigned long initrd_len, const char *cmdline);
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#endif /* CONFIG_PPC64 */
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#endif /* CONFIG_KEXEC_FILE */
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#else /* !CONFIG_KEXEC_CORE */
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@ -7,7 +7,7 @@ obj-y += core.o crash.o core_$(BITS).o
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obj-$(CONFIG_PPC32) += relocate_32.o
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obj-$(CONFIG_KEXEC_FILE) += file_load.o elf_$(BITS).o
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obj-$(CONFIG_KEXEC_FILE) += file_load.o file_load_$(BITS).o elf_$(BITS).o
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ifdef CONFIG_HAVE_IMA_KEXEC
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ifdef CONFIG_IMA
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@ -88,7 +88,8 @@ static void *elf64_load(struct kimage *image, char *kernel_buf,
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goto out;
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}
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ret = setup_new_fdt(image, fdt, initrd_load_addr, initrd_len, cmdline);
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ret = setup_new_fdt_ppc64(image, fdt, initrd_load_addr,
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initrd_len, cmdline);
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if (ret)
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goto out;
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@ -107,8 +108,8 @@ static void *elf64_load(struct kimage *image, char *kernel_buf,
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pr_debug("Loaded device tree at 0x%lx\n", fdt_load_addr);
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slave_code = elf_info.buffer + elf_info.proghdrs[0].p_offset;
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ret = setup_purgatory(image, slave_code, fdt, kernel_load_addr,
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fdt_load_addr);
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ret = setup_purgatory_ppc64(image, slave_code, fdt, kernel_load_addr,
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fdt_load_addr);
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if (ret)
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pr_err("Error setting up the purgatory.\n");
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@ -1,6 +1,6 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* ppc64 code to implement the kexec_file_load syscall
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* powerpc code to implement the kexec_file_load syscall
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*
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* Copyright (C) 2004 Adam Litke (agl@us.ibm.com)
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* Copyright (C) 2004 IBM Corp.
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@ -20,22 +20,7 @@
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#include <linux/libfdt.h>
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#include <asm/ima.h>
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#define SLAVE_CODE_SIZE 256
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const struct kexec_file_ops * const kexec_file_loaders[] = {
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&kexec_elf64_ops,
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NULL
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};
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int arch_kexec_kernel_image_probe(struct kimage *image, void *buf,
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unsigned long buf_len)
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{
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/* We don't support crash kernels yet. */
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if (image->type == KEXEC_TYPE_CRASH)
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return -EOPNOTSUPP;
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return kexec_image_probe_default(image, buf, buf_len);
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}
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#define SLAVE_CODE_SIZE 256 /* First 0x100 bytes */
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/**
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* setup_purgatory - initialize the purgatory's global variables
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87
arch/powerpc/kexec/file_load_64.c
Normal file
87
arch/powerpc/kexec/file_load_64.c
Normal file
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@ -0,0 +1,87 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* ppc64 code to implement the kexec_file_load syscall
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*
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* Copyright (C) 2004 Adam Litke (agl@us.ibm.com)
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* Copyright (C) 2004 IBM Corp.
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* Copyright (C) 2004,2005 Milton D Miller II, IBM Corporation
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* Copyright (C) 2005 R Sharada (sharada@in.ibm.com)
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* Copyright (C) 2006 Mohan Kumar M (mohan@in.ibm.com)
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* Copyright (C) 2020 IBM Corporation
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*
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* Based on kexec-tools' kexec-ppc64.c, kexec-elf-rel-ppc64.c, fs2dt.c.
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* Heavily modified for the kernel by
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* Hari Bathini, IBM Corporation.
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*/
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#include <linux/kexec.h>
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#include <linux/of_fdt.h>
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#include <linux/libfdt.h>
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const struct kexec_file_ops * const kexec_file_loaders[] = {
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&kexec_elf64_ops,
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NULL
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};
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/**
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* setup_purgatory_ppc64 - initialize PPC64 specific purgatory's global
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* variables and call setup_purgatory() to initialize
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* common global variable.
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* @image: kexec image.
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* @slave_code: Slave code for the purgatory.
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* @fdt: Flattened device tree for the next kernel.
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* @kernel_load_addr: Address where the kernel is loaded.
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* @fdt_load_addr: Address where the flattened device tree is loaded.
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*
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* Returns 0 on success, negative errno on error.
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*/
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int setup_purgatory_ppc64(struct kimage *image, const void *slave_code,
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const void *fdt, unsigned long kernel_load_addr,
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unsigned long fdt_load_addr)
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{
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int ret;
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ret = setup_purgatory(image, slave_code, fdt, kernel_load_addr,
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fdt_load_addr);
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if (ret)
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pr_err("Failed to setup purgatory symbols");
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return ret;
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}
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/**
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* setup_new_fdt_ppc64 - Update the flattend device-tree of the kernel
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* being loaded.
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* @image: kexec image being loaded.
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* @fdt: Flattened device tree for the next kernel.
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* @initrd_load_addr: Address where the next initrd will be loaded.
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* @initrd_len: Size of the next initrd, or 0 if there will be none.
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* @cmdline: Command line for the next kernel, or NULL if there will
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* be none.
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*
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* Returns 0 on success, negative errno on error.
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*/
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int setup_new_fdt_ppc64(const struct kimage *image, void *fdt,
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unsigned long initrd_load_addr,
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unsigned long initrd_len, const char *cmdline)
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{
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return setup_new_fdt(image, fdt, initrd_load_addr, initrd_len, cmdline);
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}
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/**
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* arch_kexec_kernel_image_probe - Does additional handling needed to setup
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* kexec segments.
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* @image: kexec image being loaded.
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* @buf: Buffer pointing to elf data.
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* @buf_len: Length of the buffer.
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*
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* Returns 0 on success, negative errno on error.
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*/
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int arch_kexec_kernel_image_probe(struct kimage *image, void *buf,
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unsigned long buf_len)
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{
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/* We don't support crash kernels yet. */
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if (image->type == KEXEC_TYPE_CRASH)
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return -EOPNOTSUPP;
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return kexec_image_probe_default(image, buf, buf_len);
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}
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@ -2,11 +2,11 @@
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KASAN_SANITIZE := n
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targets += trampoline.o purgatory.ro kexec-purgatory.c
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targets += trampoline_$(BITS).o purgatory.ro kexec-purgatory.c
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LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined
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$(obj)/purgatory.ro: $(obj)/trampoline.o FORCE
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$(obj)/purgatory.ro: $(obj)/trampoline_$(BITS).o FORCE
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$(call if_changed,ld)
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quiet_cmd_bin2c = BIN2C $@
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