[PATCHv8 01/14] x86/boot: Centralize __pa()/__va() definitions

From: Kirill A. Shutemov
Date: Tue Dec 06 2022 - 20:50:06 EST


Replace multiple __pa()/__va() definitions with a single one in misc.h.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Reviewed-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
---
arch/x86/boot/compressed/ident_map_64.c | 8 --------
arch/x86/boot/compressed/misc.h | 9 +++++++++
arch/x86/boot/compressed/sev.c | 2 --
3 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/arch/x86/boot/compressed/ident_map_64.c b/arch/x86/boot/compressed/ident_map_64.c
index d4a314cc50d6..56550f289118 100644
--- a/arch/x86/boot/compressed/ident_map_64.c
+++ b/arch/x86/boot/compressed/ident_map_64.c
@@ -8,14 +8,6 @@
* Copyright (C) 2016 Kees Cook
*/

-/*
- * Since we're dealing with identity mappings, physical and virtual
- * addresses are the same, so override these defines which are ultimately
- * used by the headers in misc.h.
- */
-#define __pa(x) ((unsigned long)(x))
-#define __va(x) ((void *)((unsigned long)(x)))
-
/* No PAGE_TABLE_ISOLATION support needed either: */
#undef CONFIG_PAGE_TABLE_ISOLATION

diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
index 62208ec04ca4..d37d612a6390 100644
--- a/arch/x86/boot/compressed/misc.h
+++ b/arch/x86/boot/compressed/misc.h
@@ -19,6 +19,15 @@
/* cpu_feature_enabled() cannot be used this early */
#define USE_EARLY_PGTABLE_L5

+/*
+ * Boot stub deals with identity mappings, physical and virtual addresses are
+ * the same, so override these defines.
+ *
+ * <asm/page.h> will not define them if they are already defined.
+ */
+#define __pa(x) ((unsigned long)(x))
+#define __va(x) ((void *)((unsigned long)(x)))
+
#include <linux/linkage.h>
#include <linux/screen_info.h>
#include <linux/elf.h>
diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c
index c93930d5ccbd..e4d3a2da2eb9 100644
--- a/arch/x86/boot/compressed/sev.c
+++ b/arch/x86/boot/compressed/sev.c
@@ -104,9 +104,7 @@ static enum es_result vc_read_mem(struct es_em_ctxt *ctxt,
}

#undef __init
-#undef __pa
#define __init
-#define __pa(x) ((unsigned long)(x))

#define __BOOT_COMPRESSED

--
2.38.0