Store the phyical address and size of the IMA measurement logs that get picked up
by the setup_dtb during kexec.
Signed-off-by: Prakhar Srivastava <prsriva@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/include/asm/ima.h | 17 +++++++++++++++++
arch/arm64/include/asm/kexec.h | 3 +++
arch/arm64/kernel/machine_kexec_file.c | 17 +++++++++++++++++
3 files changed, 37 insertions(+)
create mode 100644 arch/arm64/include/asm/ima.h
diff --git a/arch/arm64/include/asm/ima.h b/arch/arm64/include/asm/ima.h
new file mode 100644
index 000000000000..70ac39b74607
--- /dev/null
+++ b/arch/arm64/include/asm/ima.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_ARCH_IMA_H
+#define _ASM_ARCH_IMA_H
+
+struct kimage;
+
+#ifdef CONFIG_IMA_KEXEC
+int arch_ima_add_kexec_buffer(struct kimage *image, unsigned long load_addr,
+ size_t size);
+#else
+static inline int arch_ima_add_kexec_buffer(struct kimage *image,
+ unsigned long load_addr, size_t size)
+{
+ return 0;
+}
+#endif /* CONFIG_IMA_KEXEC */
+#endif /* _ASM_ARCH_IMA_H */
diff --git a/arch/arm64/include/asm/kexec.h b/arch/arm64/include/asm/kexec.h
index d24b527e8c00..7bd60c185ad3 100644
--- a/arch/arm64/include/asm/kexec.h
+++ b/arch/arm64/include/asm/kexec.h
@@ -100,6 +100,9 @@ struct kimage_arch {
void *elf_headers;
unsigned long elf_headers_mem;
unsigned long elf_headers_sz;
+
+ phys_addr_t ima_buffer_addr;
+ size_t ima_buffer_size;
};
extern const struct kexec_file_ops kexec_image_ops;
diff --git a/arch/arm64/kernel/machine_kexec_file.c b/arch/arm64/kernel/machine_kexec_file.c
index 361a1143e09e..4c54723e7a04 100644
--- a/arch/arm64/kernel/machine_kexec_file.c
+++ b/arch/arm64/kernel/machine_kexec_file.c
@@ -38,6 +38,23 @@ const struct kexec_file_ops * const kexec_file_loaders[] = {
NULL
};
+/**
+ * arch_ima_add_kexec_buffer - do arch-specific steps to add the IMA buffer
+ *
+ * Architectures should use this function to pass on the IMA buffer
+ * information to the next kernel.
+ *
+ * Return: 0 on success, negative errno on error.
+ */
+int arch_ima_add_kexec_buffer(struct kimage *image, unsigned long load_addr,
+ size_t size)
+{
+ image->arch.ima_buffer_addr = load_addr;
+ image->arch.ima_buffer_size = size;
+ return 0;
+}
+
+
int arch_kimage_file_post_load_cleanup(struct kimage *image)
{
vfree(image->arch.dtb);
--
2.25.1
