linux-kernel - [PATCH 5/5] x86: Move enabling of PSE and PGE out of init_memory

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

Message-ID: <1344547389-4599-6-git-send-email-jacob.shin@amd.com>
Date:	Thu, 9 Aug 2012 16:23:09 -0500
From:	Jacob Shin <jacob.shin@....com>
To:	X86-ML <x86@...nel.org>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Yinghai Lu <yinghai@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andreas Herrmann <andreas.herrmann3@....com>,
	Jacob Shin <jacob.shin@....com>
Subject: [PATCH 5/5] x86: Move enabling of PSE and PGE out of init_memory_mapping

Since we now call init_memory_mapping for each E820_RAM region in a
loop, move cr4 writes out to setup_arch.

Signed-off-by: Jacob Shin <jacob.shin@....com>
---
 arch/x86/kernel/setup.c |   10 ++++++++++
 arch/x86/mm/init.c      |   10 ----------
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 4f26944..5dfeb8f 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -958,6 +958,16 @@ void __init setup_arch(char **cmdline_p)
 
 	init_gbpages();
 
+	/* Enable PSE if available */
+	if (cpu_has_pse)
+		set_in_cr4(X86_CR4_PSE);
+
+	/* Enable PGE if available */
+	if (cpu_has_pge) {
+		set_in_cr4(X86_CR4_PGE);
+		__supported_pte_mask |= _PAGE_GLOBAL;
+	}
+
 	init_pfn = max_pfn_mapped;
 
 	memset(pfn_mapped, 0, sizeof(pfn_mapped));
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index d4e01a7..99f111e 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -152,16 +152,6 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
 	use_gbpages = direct_gbpages;
 #endif
 
-	/* Enable PSE if available */
-	if (cpu_has_pse)
-		set_in_cr4(X86_CR4_PSE);
-
-	/* Enable PGE if available */
-	if (cpu_has_pge) {
-		set_in_cr4(X86_CR4_PGE);
-		__supported_pte_mask |= _PAGE_GLOBAL;
-	}
-
 	if (use_gbpages)
 		page_size_mask |= 1 << PG_LEVEL_1G;
 	if (use_pse)
-- 
1.7.9.5


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/