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powerpc: ima: send the kexec buffer to the next kernel

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The IMA kexec buffer allows the currently running kernel to pass the
measurement list via a kexec segment to the kernel that will be kexec'd.

This is the architecture-specific part of setting up the IMA kexec
buffer for the next kernel.  It will be used in the next patch.

Link: http://lkml.kernel.org/r/1480554346-29071-6-git-send-email-zohar@linux.vnet.ibm.com
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Andreas Steffen <andreas.steffen@strongswan.org>
Cc: Dmitry Kasatkin <dmitry.kasatkin@gmail.com>
Cc: Josh Sklar <sklar@linux.vnet.ibm.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Thiago Jung Bauermann
2016-12-19 16:22:45 -08:00
committed by Linus Torvalds
parent d158847ae8
commit ab6b1d1fc4
5 changed files with 129 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
arch/powerpc/include/asm/ima.h
View File

@@ -1,6 +1,8 @@
#ifndef _ASM_POWERPC_IMA_H
#define _ASM_POWERPC_IMA_H
struct kimage;
int ima_get_kexec_buffer(void **addr, size_t *size);
int ima_free_kexec_buffer(void);
@@ -10,4 +12,18 @@ void remove_ima_buffer(void *fdt, int chosen_node);
static inline void remove_ima_buffer(void *fdt, int chosen_node) {}
#endif
#ifdef CONFIG_IMA_KEXEC
int arch_ima_add_kexec_buffer(struct kimage *image, unsigned long load_addr,
size_t size);
int setup_ima_buffer(const struct kimage *image, void *fdt, int chosen_node);
#else
static inline int setup_ima_buffer(const struct kimage *image, void *fdt,
int chosen_node)
{
remove_ima_buffer(fdt, chosen_node);
return 0;
}
#endif /* CONFIG_IMA_KEXEC */
#endif /* _ASM_POWERPC_IMA_H */

14
arch/powerpc/include/asm/kexec.h
View File

@@ -94,11 +94,21 @@ static inline bool kdump_in_progress(void)
#ifdef CONFIG_KEXEC_FILE
extern struct kexec_file_ops kexec_elf64_ops;
#ifdef CONFIG_IMA_KEXEC
#define ARCH_HAS_KIMAGE_ARCH
struct kimage_arch {
phys_addr_t ima_buffer_addr;
size_t ima_buffer_size;
};
#endif
int setup_purgatory(struct kimage *image, const void *slave_code,
const void *fdt, unsigned long kernel_load_addr,
unsigned long fdt_load_addr);
int setup_new_fdt(void *fdt, unsigned long initrd_load_addr,
unsigned long initrd_len, const char *cmdline);
int setup_new_fdt(const struct kimage *image, void *fdt,
unsigned long initrd_load_addr, unsigned long initrd_len,
const char *cmdline);
int delete_fdt_mem_rsv(void *fdt, unsigned long start, unsigned long size);
#endif /* CONFIG_KEXEC_FILE */