linux-kernel - [PATCH 2/4] x86/boot: replace __PHYSICAL_START with LOAD_PHYSICAL

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Message-Id: <20240313075839.8321-3-richard.weiyang@gmail.com>
Date: Wed, 13 Mar 2024 07:58:37 +0000
From: Wei Yang <richard.weiyang@...il.com>
To: tglx@...utronix.de,
	mingo@...hat.com,
	bp@...en8.de,
	dave.hansen@...ux.intel.com
Cc: x86@...nel.org,
	linux-kernel@...r.kernel.org,
	Wei Yang <richard.weiyang@...il.com>
Subject: [PATCH 2/4] x86/boot: replace __PHYSICAL_START with LOAD_PHYSICAL_ADDR

Both __PHYSICAL_START and LOAD_PHYSICAL_ADDR are defined to get aligned
CONFIG_PHYSICAL_START, so we can replace __PHYSICAL_START with
LOAD_PHYSICAL_ADDR. And then remove the definition of __PHYSICAL_START,
which is only used to define __START_KERNEL.

Since <asm/boot.h> includes <asm/pgtable_types.h>, which includes
<asm/page_types.h>, it is fine to move definition from <asm/boot.h> to
<asm/page_types.h>.

Signed-off-by: Wei Yang <richard.weiyang@...il.com>
---
 arch/x86/include/asm/boot.h       | 5 -----
 arch/x86/include/asm/page_types.h | 8 +++++---
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/arch/x86/include/asm/boot.h b/arch/x86/include/asm/boot.h
index a38cc0afc90a..12cbc57d0128 100644
--- a/arch/x86/include/asm/boot.h
+++ b/arch/x86/include/asm/boot.h
@@ -6,11 +6,6 @@
 #include <asm/pgtable_types.h>
 #include <uapi/asm/boot.h>
 
-/* Physical address where kernel should be loaded. */
-#define LOAD_PHYSICAL_ADDR ((CONFIG_PHYSICAL_START \
-				+ (CONFIG_PHYSICAL_ALIGN - 1)) \
-				& ~(CONFIG_PHYSICAL_ALIGN - 1))
-
 /* Minimum kernel alignment, as a power of two */
 #ifdef CONFIG_X86_64
 # define MIN_KERNEL_ALIGN_LG2	PMD_SHIFT
diff --git a/arch/x86/include/asm/page_types.h b/arch/x86/include/asm/page_types.h
index 86bd4311daf8..acc1620fd121 100644
--- a/arch/x86/include/asm/page_types.h
+++ b/arch/x86/include/asm/page_types.h
@@ -31,10 +31,12 @@
 
 #define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_TSK_EXEC
 
-#define __PHYSICAL_START	ALIGN(CONFIG_PHYSICAL_START, \
-				      CONFIG_PHYSICAL_ALIGN)
+/* Physical address where kernel should be loaded. */
+#define LOAD_PHYSICAL_ADDR ((CONFIG_PHYSICAL_START \
+				+ (CONFIG_PHYSICAL_ALIGN - 1)) \
+				& ~(CONFIG_PHYSICAL_ALIGN - 1))
 
-#define __START_KERNEL		(__START_KERNEL_map + __PHYSICAL_START)
+#define __START_KERNEL		(__START_KERNEL_map + LOAD_PHYSICAL_ADDR)
 
 #ifdef CONFIG_X86_64
 #include <asm/page_64_types.h>
-- 
2.34.1