| From | Joerg Roedel <> | Subject | [PATCH 06/16] x86/mm/ldt: Reserve high address-space range for the LDT | Date | Tue, 16 Jan 2018 17:36:49 +0100 |
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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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