linux-kernel - [tip:x86/asm] x86/boot/64: Use defines for page size

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <tip-9b032d21f6482ee305dcdec418c15153614b1dcc@git.kernel.org>
Date:   Thu, 24 Nov 2016 22:46:03 -0800
From:   tip-bot for Borislav Petkov <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     torvalds@...ux-foundation.org, bp@...en8.de, luto@...nel.org,
        mingo@...nel.org, jpoimboe@...hat.com,
        linux-kernel@...r.kernel.org, peterz@...radead.org,
        dvlasenk@...hat.com, brgerst@...il.com, tglx@...utronix.de,
        hpa@...or.com, bp@...e.de
Subject: [tip:x86/asm] x86/boot/64: Use defines for page size

Commit-ID:  9b032d21f6482ee305dcdec418c15153614b1dcc
Gitweb:     http://git.kernel.org/tip/9b032d21f6482ee305dcdec418c15153614b1dcc
Author:     Borislav Petkov <bp@...e.de>
AuthorDate: Thu, 24 Nov 2016 22:05:50 +0100
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Fri, 25 Nov 2016 07:11:29 +0100

x86/boot/64: Use defines for page size

... instead of naked numbers like the rest of the asm does in this file.

No code changed:

  # arch/x86/kernel/head_64.o:

   text    data     bss     dec     hex filename
   1124  290864    4096  296084   48494 head_64.o.before
   1124  290864    4096  296084   48494 head_64.o.after

md5:
   87086e202588939296f66e892414ffe2  head_64.o.before.asm
   87086e202588939296f66e892414ffe2  head_64.o.after.asm

Signed-off-by: Borislav Petkov <bp@...e.de>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Link: http://lkml.kernel.org/r/20161124210550.15025-1-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/head_64.S | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index b07cd27..a15d381 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -112,20 +112,20 @@ startup_64:
 	movq	%rdi, %rax
 	shrq	$PGDIR_SHIFT, %rax
 
-	leaq	(4096 + _KERNPG_TABLE)(%rbx), %rdx
+	leaq	(PAGE_SIZE + _KERNPG_TABLE)(%rbx), %rdx
 	movq	%rdx, 0(%rbx,%rax,8)
 	movq	%rdx, 8(%rbx,%rax,8)
 
-	addq	$4096, %rdx
+	addq	$PAGE_SIZE, %rdx
 	movq	%rdi, %rax
 	shrq	$PUD_SHIFT, %rax
 	andl	$(PTRS_PER_PUD-1), %eax
-	movq	%rdx, 4096(%rbx,%rax,8)
+	movq	%rdx, PAGE_SIZE(%rbx,%rax,8)
 	incl	%eax
 	andl	$(PTRS_PER_PUD-1), %eax
-	movq	%rdx, 4096(%rbx,%rax,8)
+	movq	%rdx, PAGE_SIZE(%rbx,%rax,8)
 
-	addq	$8192, %rbx
+	addq	$PAGE_SIZE * 2, %rbx
 	movq	%rdi, %rax
 	shrq	$PMD_SHIFT, %rdi
 	addq	$(__PAGE_KERNEL_LARGE_EXEC & ~_PAGE_GLOBAL), %rax