From: Ashish Kalra <ashish.kalra@xxxxxxx>
set_memory_p() provides a way to change atributes of a memory range
to be marked as present.
Signed-off-by: Ashish Kalra <ashish.kalra@xxxxxxx>
Signed-off-by: Michael Roth <michael.roth@xxxxxxx>
---
arch/x86/include/asm/set_memory.h | 3 ++-
arch/x86/mm/pat/set_memory.c | 12 ++++++------
2 files changed, 8 insertions(+), 7 deletions(-)
diff --git a/arch/x86/include/asm/set_memory.h b/arch/x86/include/asm/set_memory.h
index b45c4d27fd46..56be492eb2d1 100644
--- a/arch/x86/include/asm/set_memory.h
+++ b/arch/x86/include/asm/set_memory.h
@@ -12,7 +12,7 @@
* Cacheability : UnCached, WriteCombining, WriteThrough, WriteBack
* Executability : eXecutable, NoteXecutable
* Read/Write : ReadOnly, ReadWrite
- * Presence : NotPresent
+ * Presence : NotPresent, Present
* Encryption : Encrypted, Decrypted
*
* Within a category, the attributes are mutually exclusive.
@@ -44,6 +44,7 @@ int set_memory_uc(unsigned long addr, int numpages);
int set_memory_wc(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_p(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);
diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c
index 2e5a045731de..b1f79062c4a5 100644
--- a/arch/x86/mm/pat/set_memory.c
+++ b/arch/x86/mm/pat/set_memory.c
@@ -1993,17 +1993,12 @@ int set_mce_nospec(unsigned long pfn)
return rc;
}
-static int set_memory_p(unsigned long *addr, int numpages)
-{
- return change_page_attr_set(addr, numpages, __pgprot(_PAGE_PRESENT), 0);
-}
-
/* Restore full speculative operation to the pfn. */
int clear_mce_nospec(unsigned long pfn)
{
unsigned long addr = (unsigned long) pfn_to_kaddr(pfn);
- return set_memory_p(&addr, 1);
+ return set_memory_p(addr, 1);
}
EXPORT_SYMBOL_GPL(clear_mce_nospec);
#endif /* CONFIG_X86_64 */
@@ -2039,6 +2034,11 @@ int set_memory_np(unsigned long addr, int numpages)
return change_page_attr_clear(&addr, numpages, __pgprot(_PAGE_PRESENT), 0);
}
+int set_memory_p(unsigned long addr, int numpages)
+{
+ return change_page_attr_set(&addr, numpages, __pgprot(_PAGE_PRESENT), 0);
+}
+
int set_memory_np_noalias(unsigned long addr, int numpages)
{
int cpa_flags = CPA_NO_CHECK_ALIAS;
--
2.25.1
