Groups > linux.kernel > #1201161

[PATCH v3 1/10] x86/vdso32: Define PGTABLE_LEVELS to 32bit VDSO

Path	csiph.com!goblin1!goblin2!goblin.stu.neva.ru!aioe.org!bofh.it!news.nic.it!robomod
From	Toshi Kani <toshi.kani@hp.com>
Newsgroups	linux.kernel
Subject	[PATCH v3 1/10] x86/vdso32: Define PGTABLE_LEVELS to 32bit VDSO
Date	Wed, 05 Aug 2015 23:50:02 +0200
Message-ID	<pUeJs-5l3-15@gated-at.bofh.it> (permalink)
References	<pUeJr-5l3-7@gated-at.bofh.it>
X-Original-To	hpa@zytor.com, tglx@linutronix.de, mingo@redhat.com
X-Mailer	git-send-email 2.4.3
Sender	robomod@news.nic.it
List-ID	<linux-kernel.vger.kernel.org>
X-Mailing-List	linux-kernel@vger.kernel.org
Approved	robomod@news.nic.it
Lines	39
Organization	linux.* mail to news gateway
X-Original-Cc	akpm@linux-foundation.org, bp@alien8.de, linux-mm@kvack.org, linux-kernel@vger.kernel.org, x86@kernel.org, jgross@suse.com, konrad.wilk@oracle.com, elliott@hp.com, Toshi Kani <toshi.kani@hp.com>
X-Original-Date	Wed, 5 Aug 2015 15:43:24 -0600
X-Original-Message-ID	<1438811013-30983-2-git-send-email-toshi.kani@hp.com>
X-Original-References	<1438811013-30983-1-git-send-email-toshi.kani@hp.com>
X-Original-Sender	linux-kernel-owner@vger.kernel.org
Xref	csiph.com linux.kernel:1201161

Show key headers only | View raw

In case of CONFIG_X86_64, vdso32/vclock_gettime.c fakes a 32bit
kernel configuration by re-defining it to CONFIG_X86_32.  However,
it does not re-define CONFIG_PGTABLE_LEVELS leaving it as 4 levels.
Fix it by re-defining CONFIG_PGTABLE_LEVELS to 2 as X86_PAE is not
set.

Signed-off-by: Toshi Kani <toshi.kani@hp.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
---
 arch/x86/entry/vdso/vdso32/vclock_gettime.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/entry/vdso/vdso32/vclock_gettime.c b/arch/x86/entry/vdso/vdso32/vclock_gettime.c
index 175cc72..87a86e0 100644
--- a/arch/x86/entry/vdso/vdso32/vclock_gettime.c
+++ b/arch/x86/entry/vdso/vdso32/vclock_gettime.c
@@ -14,11 +14,13 @@
  */
 #undef CONFIG_64BIT
 #undef CONFIG_X86_64
+#undef CONFIG_PGTABLE_LEVELS
 #undef CONFIG_ILLEGAL_POINTER_VALUE
 #undef CONFIG_SPARSEMEM_VMEMMAP
 #undef CONFIG_NR_CPUS
 
 #define CONFIG_X86_32 1
+#define CONFIG_PGTABLE_LEVELS 2
 #define CONFIG_PAGE_OFFSET 0
 #define CONFIG_ILLEGAL_POINTER_VALUE 0
 #define CONFIG_NR_CPUS 1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Thread

[PATCH v3 0/10] x86/mm: Handle large PAT bit in pud/pmd interfaces Toshi Kani <toshi.kani@hp.com> - 2015-08-05 23:50 +0200
  [PATCH v3 9/10] x86/mm: Fix __split_large_page() to handle large PAT bit Toshi Kani <toshi.kani@hp.com> - 2015-08-05 23:50 +0200
  [PATCH v3 1/10] x86/vdso32: Define PGTABLE_LEVELS to 32bit VDSO Toshi Kani <toshi.kani@hp.com> - 2015-08-05 23:50 +0200
  [PATCH v3 10/10] x86/mm: Fix the same pgprot handling in try_preserve_large_page() Toshi Kani <toshi.kani@hp.com> - 2015-08-05 23:50 +0200
  [PATCH v3 6/10] x86/mm: Fix slow_virt_to_phys() to handle large PAT bit Toshi Kani <toshi.kani@hp.com> - 2015-08-05 23:50 +0200
  [PATCH v3 3/10] x86/asm: Fix pud/pmd interfaces to handle large PAT bit Toshi Kani <toshi.kani@hp.com> - 2015-08-05 23:50 +0200
  [PATCH v3 7/10] x86/mm: Fix gup_huge_p?d() to handle large PAT bit Toshi Kani <toshi.kani@hp.com> - 2015-08-05 23:50 +0200
  [PATCH v3 2/10] x86/asm: Move PUD_PAGE macros to page_types.h Toshi Kani <toshi.kani@hp.com> - 2015-08-05 23:50 +0200
  [PATCH v3 8/10] x86/mm: Fix try_preserve_large_page() to handle large PAT bit Toshi Kani <toshi.kani@hp.com> - 2015-08-05 23:50 +0200
  [PATCH v3 5/10] x86/mm: Fix page table dump to show PAT bit Toshi Kani <toshi.kani@hp.com> - 2015-08-05 23:50 +0200

csiph-web