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Subject[PATCH 06/16] x86/mm/ldt: Reserve high address-space range for the LDT
Date
From: Joerg Roedel <jroedel@suse.de>

Reserve 2MB/4MB of address space for mapping the LDT to
user-space.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
arch/x86/include/asm/pgtable_32_types.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/pgtable_32_types.h b/arch/x86/include/asm/pgtable_32_types.h
index ce245b0cdfca..3c30a7fcae68 100644
--- a/arch/x86/include/asm/pgtable_32_types.h
+++ b/arch/x86/include/asm/pgtable_32_types.h
@@ -47,9 +47,12 @@ extern bool __vmalloc_start_set; /* set once high_memory is set */
#define CPU_ENTRY_AREA_BASE \
((FIXADDR_START - PAGE_SIZE * (CPU_ENTRY_AREA_PAGES + 1)) & PMD_MASK)

-#define PKMAP_BASE \
+#define LDT_BASE_ADDR \
((CPU_ENTRY_AREA_BASE - PAGE_SIZE) & PMD_MASK)

+#define PKMAP_BASE \
+ ((LDT_BASE_ADDR - PAGE_SIZE) & PMD_MASK)
+
#ifdef CONFIG_HIGHMEM
# define VMALLOC_END (PKMAP_BASE - 2 * PAGE_SIZE)
#else
--
2.13.6
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