On 03/05/2015 08:27 AM, Ingo Molnar wrote:
Now that we've simplified the gbpages config space, move the
'page_size_mask' initialization into probe_page_size_mask(), right
next to the PSE and PGE enablement lines.
Cc: Luis R. Rodriguez <mcg...@suse.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Andy Lutomirski <l...@amacapital.net>
Cc: Borislav Petkov <b...@alien8.de>
Cc: Borislav Petkov <b...@suse.de>
Cc: Dave Hansen <dave.han...@linux.intel.com>
Cc: David Vrabel <david.vra...@citrix.com>
Cc: Dexuan Cui <de...@microsoft.com>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Cc: H. Peter Anvin <h...@zytor.com>
Cc: jbeul...@suse.com
Cc: Jan Beulich <jbeul...@suse.com>
Cc: Joonsoo Kim <iamjoonsoo....@lge.com>
Cc: Juergen Gross <jgr...@suse.com>
Cc: Linus Torvalds <torva...@linux-foundation.org>
Cc: Pavel Machek <pa...@ucw.cz>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Tony Lindgren <t...@atomide.com>
Cc: Toshi Kani <toshi.k...@hp.com>
Cc: Vlastimil Babka <vba...@suse.cz>
Cc: Xishi Qiu <qiuxi...@huawei.com>
Cc: julia.law...@lip6.fr
Signed-off-by: Ingo Molnar <mi...@kernel.org>
---
arch/x86/mm/init.c | 23 ++++++++++-------------
1 file changed, 10 insertions(+), 13 deletions(-)
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 8704153f2675..6dc85d51cd98 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -131,29 +131,18 @@ void __init early_alloc_pgt_buf(void)
int after_bootmem;
-static int page_size_mask;
-
early_param_on_off("gbpages", "nogbpages", direct_gbpages,
CONFIG_X86_DIRECT_GBPAGES);
-static void __init init_gbpages(void)
-{
- if (direct_gbpages && cpu_has_gbpages) {
- printk(KERN_INFO "Using GB pages for direct mapping\n");
- page_size_mask |= 1 << PG_LEVEL_1G;
- } else
- direct_gbpages = 0;
-}
-
struct map_range {
unsigned long start;
unsigned long end;
unsigned page_size_mask;
};
+static int page_size_mask;
+
static void __init probe_page_size_mask(void)
{
- init_gbpages();
-
#if !defined(CONFIG_DEBUG_PAGEALLOC) && !defined(CONFIG_KMEMCHECK)
/*
* For CONFIG_DEBUG_PAGEALLOC, identity mapping will use small pages.
@@ -173,6 +162,14 @@ static void __init probe_page_size_mask(void)
cr4_set_bits_and_update_boot(X86_CR4_PGE);
__supported_pte_mask |= _PAGE_GLOBAL;
}
+
+ /* Enable 1 GB linear kernel mappings if available: */
+ if (direct_gbpages && cpu_has_gbpages) {
+ printk(KERN_INFO "Using GB pages for direct mapping\n");
pr_info()?
+ page_size_mask |= 1 << PG_LEVEL_1G;
+ } else {
+ direct_gbpages = 0;
+ }
}
#ifdef CONFIG_X86_32
--
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