diff --git a/arch/x86/include/asm/set_memory.h b/arch/x86/include/asm/set_memory.h
index eaec6c364e42d07f55930a80ef29b9d5c248165d..cd71273ec49d91aacffe3eff8883617ef94d8627 100644
--- a/arch/x86/include/asm/set_memory.h
+++ b/arch/x86/include/asm/set_memory.h
@@ -11,6 +11,7 @@
  * Executability : eXeutable, NoteXecutable
  * Read/Write    : ReadOnly, ReadWrite
  * Presence      : NotPresent
+ * Encryption    : Encrypted, Decrypted
  *
  * Within a category, the attributes are mutually exclusive.
  *
@@ -42,6 +43,8 @@ int set_memory_wt(unsigned long addr, int numpages);
 int set_memory_wb(unsigned long addr, int numpages);
 int set_memory_np(unsigned long addr, int numpages);
 int set_memory_4k(unsigned long addr, int numpages);
+int set_memory_encrypted(unsigned long addr, int numpages);
+int set_memory_decrypted(unsigned long addr, int numpages);
 
 int set_memory_array_uc(unsigned long *addr, int addrinarray);
 int set_memory_array_wc(unsigned long *addr, int addrinarray);
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 7e2d6c0a64c4367af8b6ddbb62f498929d800198..9c8ea129ff5cd16580aa34fa055e6ddbf1e44b4d 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -1775,6 +1775,68 @@ int set_memory_4k(unsigned long addr, int numpages)
 					__pgprot(0), 1, 0, NULL);
 }
 
+static int __set_memory_enc_dec(unsigned long addr, int numpages, bool enc)
+{
+	struct cpa_data cpa;
+	unsigned long start;
+	int ret;
+
+	/* Nothing to do if the SME is not active */
+	if (!sme_active())
+		return 0;
+
+	/* Should not be working on unaligned addresses */
+	if (WARN_ONCE(addr & ~PAGE_MASK, "misaligned address: %#lx\n", addr))
+		addr &= PAGE_MASK;
+
+	start = addr;
+
+	memset(&cpa, 0, sizeof(cpa));
+	cpa.vaddr = &addr;
+	cpa.numpages = numpages;
+	cpa.mask_set = enc ? __pgprot(_PAGE_ENC) : __pgprot(0);
+	cpa.mask_clr = enc ? __pgprot(0) : __pgprot(_PAGE_ENC);
+	cpa.pgd = init_mm.pgd;
+
+	/* Must avoid aliasing mappings in the highmem code */
+	kmap_flush_unused();
+	vm_unmap_aliases();
+
+	/*
+	 * Before changing the encryption attribute, we need to flush caches.
+	 */
+	if (static_cpu_has(X86_FEATURE_CLFLUSH))
+		cpa_flush_range(start, numpages, 1);
+	else
+		cpa_flush_all(1);
+
+	ret = __change_page_attr_set_clr(&cpa, 1);
+
+	/*
+	 * After changing the encryption attribute, we need to flush TLBs
+	 * again in case any speculative TLB caching occurred (but no need
+	 * to flush caches again).  We could just use cpa_flush_all(), but
+	 * in case TLB flushing gets optimized in the cpa_flush_range()
+	 * path use the same logic as above.
+	 */
+	if (static_cpu_has(X86_FEATURE_CLFLUSH))
+		cpa_flush_range(start, numpages, 0);
+	else
+		cpa_flush_all(0);
+
+	return ret;
+}
+
+int set_memory_encrypted(unsigned long addr, int numpages)
+{
+	return __set_memory_enc_dec(addr, numpages, true);
+}
+
+int set_memory_decrypted(unsigned long addr, int numpages)
+{
+	return __set_memory_enc_dec(addr, numpages, false);
+}
+
 int set_pages_uc(struct page *page, int numpages)
 {
 	unsigned long addr = (unsigned long)page_address(page);