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Diffstat (limited to 'arch/x86/kernel/machine_kexec_64.c')
-rw-r--r--arch/x86/kernel/machine_kexec_64.c25
1 files changed, 23 insertions, 2 deletions
diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
index cb0a30473c23..1f790cf9d38f 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -87,7 +87,7 @@ static int init_transition_pgtable(struct kimage *image, pgd_t *pgd)
set_pmd(pmd, __pmd(__pa(pte) | _KERNPG_TABLE));
}
pte = pte_offset_kernel(pmd, vaddr);
- set_pte(pte, pfn_pte(paddr >> PAGE_SHIFT, PAGE_KERNEL_EXEC));
+ set_pte(pte, pfn_pte(paddr >> PAGE_SHIFT, PAGE_KERNEL_EXEC_NOENC));
return 0;
err:
free_transition_pgtable(image);
@@ -115,6 +115,7 @@ static int init_pgtable(struct kimage *image, unsigned long start_pgtable)
.alloc_pgt_page = alloc_pgt_page,
.context = image,
.page_flag = __PAGE_KERNEL_LARGE_EXEC,
+ .kernpg_flag = _KERNPG_TABLE_NOENC,
};
unsigned long mstart, mend;
pgd_t *level4p;
@@ -334,7 +335,8 @@ void machine_kexec(struct kimage *image)
image->start = relocate_kernel((unsigned long)image->head,
(unsigned long)page_list,
image->start,
- image->preserve_context);
+ image->preserve_context,
+ sme_active());
#ifdef CONFIG_KEXEC_JUMP
if (image->preserve_context)
@@ -602,3 +604,22 @@ void arch_kexec_unprotect_crashkres(void)
{
kexec_mark_crashkres(false);
}
+
+int arch_kexec_post_alloc_pages(void *vaddr, unsigned int pages, gfp_t gfp)
+{
+ /*
+ * If SME is active we need to be sure that kexec pages are
+ * not encrypted because when we boot to the new kernel the
+ * pages won't be accessed encrypted (initially).
+ */
+ return set_memory_decrypted((unsigned long)vaddr, pages);
+}
+
+void arch_kexec_pre_free_pages(void *vaddr, unsigned int pages)
+{
+ /*
+ * If SME is active we need to reset the pages back to being
+ * an encrypted mapping before freeing them.
+ */
+ set_memory_encrypted((unsigned long)vaddr, pages);
+}