This is a note to let you know that I've just added the patch titled
x86/entry: Align entry text section to PMD boundary
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-entry-align-entry-text-section-to-pmd-boundary.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2f7412ba9c6af5ab16bdbb4a3fdb1dcd2b4fd3c2 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Date: Mon, 4 Dec 2017 15:07:46 +0100
Subject: x86/entry: Align entry text section to PMD boundary
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
commit 2f7412ba9c6af5ab16bdbb4a3fdb1dcd2b4fd3c2 upstream.
The (irq)entry text must be visible in the user space page tables. To allow
simple PMD based sharing, make the entry text PMD aligned.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Brian Gerst <brgerst@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: David Laight <David.Laight@xxxxxxxxxx>
Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx>
Cc: Eduardo Valentin <eduval@xxxxxxxxxx>
Cc: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Cc: Juergen Gross <jgross@xxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: aliguori@xxxxxxxxxx
Cc: daniel.gruss@xxxxxxxxxxxxxx
Cc: hughd@xxxxxxxxxx
Cc: keescook@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/vmlinux.lds.S | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -61,11 +61,17 @@ jiffies_64 = jiffies;
. = ALIGN(HPAGE_SIZE); \
__end_rodata_hpage_align = .;
+#define ALIGN_ENTRY_TEXT_BEGIN . = ALIGN(PMD_SIZE);
+#define ALIGN_ENTRY_TEXT_END . = ALIGN(PMD_SIZE);
+
#else
#define X64_ALIGN_RODATA_BEGIN
#define X64_ALIGN_RODATA_END
+#define ALIGN_ENTRY_TEXT_BEGIN
+#define ALIGN_ENTRY_TEXT_END
+
#endif
PHDRS {
@@ -102,8 +108,10 @@ SECTIONS
CPUIDLE_TEXT
LOCK_TEXT
KPROBES_TEXT
+ ALIGN_ENTRY_TEXT_BEGIN
ENTRY_TEXT
IRQENTRY_TEXT
+ ALIGN_ENTRY_TEXT_END
SOFTIRQENTRY_TEXT
*(.fixup)
*(.gnu.warning)
Patches currently in stable-queue which might be from tglx@xxxxxxxxxxxxx are
queue-4.14/x86-mm-pti-allow-nx-poison-to-be-set-in-p4d-pgd.patch
queue-4.14/x86-dumpstack-indicate-in-oops-whether-pti-is-configured-and-enabled.patch
queue-4.14/x86-mm-clarify-the-whole-asid-kernel-pcid-user-pcid-naming.patch
queue-4.14/x86-mm-abstract-switching-cr3.patch
queue-4.14/x86-mm-optimize-restore_cr3.patch
queue-4.14/x86-mm-pti-force-entry-through-trampoline-when-pti-active.patch
queue-4.14/x86-entry-align-entry-text-section-to-pmd-boundary.patch
queue-4.14/x86-mm-64-make-a-full-pgd-entry-size-hole-in-the-memory-map.patch
queue-4.14/x86-cpu_entry_area-add-debugstore-entries-to-cpu_entry_area.patch
queue-4.14/x86-mm-pti-share-entry-text-pmd.patch
queue-4.14/x86-ldt-make-the-ldt-mapping-ro.patch
queue-4.14/x86-mm-dump_pagetables-check-user-space-page-table-for-wx-pages.patch
queue-4.14/x86-pti-map-the-vsyscall-page-if-needed.patch
queue-4.14/x86-mm-pti-disable-global-pages-if-page_table_isolation-y.patch
queue-4.14/x86-mm-dump_pagetables-allow-dumping-current-pagetables.patch
queue-4.14/x86-mm-pti-add-infrastructure-for-page-table-isolation.patch
queue-4.14/x86-cpufeatures-add-x86_bug_cpu_insecure.patch
queue-4.14/x86-mm-use-fix-pcid-to-optimize-user-kernel-switches.patch
queue-4.14/x86-mm-use-invpcid-for-__native_flush_tlb_single.patch
queue-4.14/x86-mm-pti-prepare-the-x86-entry-assembly-code-for-entry-exit-cr3-switching.patch
queue-4.14/x86-mm-allow-flushing-for-future-asid-switches.patch
queue-4.14/x86-mm-pti-add-kconfig.patch
queue-4.14/x86-mm-pti-add-mapping-helper-functions.patch
queue-4.14/x86-mm-pti-map-espfix-into-user-space.patch
queue-4.14/x86-mm-pti-share-cpu_entry_area-with-user-space-page-tables.patch
queue-4.14/x86-mm-pti-add-functions-to-clone-kernel-pmds.patch
queue-4.14/x86-pti-add-the-pti-cmdline-option-and-documentation.patch
queue-4.14/x86-events-intel-ds-map-debug-buffers-in-cpu_entry_area.patch
queue-4.14/x86-mm-pti-allocate-a-separate-user-pgd.patch
queue-4.14/x86-pti-put-the-ldt-in-its-own-pgd-if-pti-is-on.patch
queue-4.14/x86-mm-pti-populate-user-pgd.patch
queue-4.14/x86-mm-dump_pagetables-add-page-table-directory-to-the-debugfs-vfs-hierarchy.patch