linux-kernel - [PATCH 2/2] x86/dump_pagetables: Fix LDT remap address marker

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Message-Id: <20181130115758.4425-3-kirill.shutemov@linux.intel.com>
Date:   Fri, 30 Nov 2018 14:57:58 +0300
From:   "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:     tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, hpa@...or.com,
        dave.hansen@...ux.intel.com, luto@...nel.org, peterz@...radead.org
Cc:     boris.ostrovsky@...cle.com, jgross@...e.com, bhe@...hat.com,
        x86@...nel.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCH 2/2] x86/dump_pagetables: Fix LDT remap address marker

The LDT remap placement has been changed. It's now placed before direct
mapping in the kernel virtual address space for both paging modes.

Change address markers order accordingly.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Fixes: d52888aa2753 ("x86/mm: Move LDT remap out of KASLR region on 5-level paging")
---
 arch/x86/mm/dump_pagetables.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c
index dad153e5a427..abcb8d00b014 100644
--- a/arch/x86/mm/dump_pagetables.c
+++ b/arch/x86/mm/dump_pagetables.c
@@ -55,10 +55,10 @@ struct addr_marker {
 enum address_markers_idx {
 	USER_SPACE_NR = 0,
 	KERNEL_SPACE_NR,
-	LOW_KERNEL_NR,
-#if defined(CONFIG_MODIFY_LDT_SYSCALL) && defined(CONFIG_X86_5LEVEL)
+#ifdef CONFIG_MODIFY_LDT_SYSCALL
 	LDT_NR,
 #endif
+	LOW_KERNEL_NR,
 	VMALLOC_START_NR,
 	VMEMMAP_START_NR,
 #ifdef CONFIG_KASAN
@@ -66,9 +66,6 @@ enum address_markers_idx {
 	KASAN_SHADOW_END_NR,
 #endif
 	CPU_ENTRY_AREA_NR,
-#if defined(CONFIG_MODIFY_LDT_SYSCALL) && !defined(CONFIG_X86_5LEVEL)
-	LDT_NR,
-#endif
 #ifdef CONFIG_X86_ESPFIX64
 	ESPFIX_START_NR,
 #endif
-- 
2.19.2