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authorQiaowei Ren <qiaowei.ren@intel.com>2014-11-14 16:18:27 +0100
committerThomas Gleixner <tglx@linutronix.de>2014-11-18 00:58:53 +0100
commit57319d80e1d328e34cb24868a4f4405661485e30 (patch)
treebf8d64fe730c72f9e52717cc7ff7389aa44ba209 /arch/x86/mm/Makefile
parentx86, mpx: Introduce VM_MPX to indicate that a VMA is MPX specific (diff)
downloadlinux-57319d80e1d328e34cb24868a4f4405661485e30.tar.xz
linux-57319d80e1d328e34cb24868a4f4405661485e30.zip
x86, mpx: Add MPX-specific mmap interface
We have chosen to perform the allocation of bounds tables in kernel (See the patch "on-demand kernel allocation of bounds tables") and to mark these VMAs with VM_MPX. However, there is currently no suitable interface to actually do this. Existing interfaces, like do_mmap_pgoff(), have no way to set a modified ->vm_ops or ->vm_flags and don't hold mmap_sem long enough to let a caller do it. This patch wraps mmap_region() and hold mmap_sem long enough to make the modifications to the VMA which we need. Also note the 32/64-bit #ifdef in the header. We actually need to do this at runtime eventually. But, for now, we don't support running 32-bit binaries on 64-bit kernels. Support for this will come in later patches. Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: linux-mm@kvack.org Cc: linux-mips@linux-mips.org Cc: Dave Hansen <dave@sr71.net> Link: http://lkml.kernel.org/r/20141114151827.CE440F67@viggo.jf.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/mm/Makefile')
-rw-r--r--arch/x86/mm/Makefile2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
index 6a19ad9f370d..ecfdc46a024a 100644
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@@ -30,3 +30,5 @@ obj-$(CONFIG_ACPI_NUMA) += srat.o
obj-$(CONFIG_NUMA_EMU) += numa_emulation.o
obj-$(CONFIG_MEMTEST) += memtest.o
+
+obj-$(CONFIG_X86_INTEL_MPX) += mpx.o