This is a note to let you know that I've just added the patch titled

x86/xen: Add unwind hint annotations

to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: x86-xen-add-unwind-hint-annotations.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@vger.kernel.org know about it.

From abbe1cac6214d81d2f4e149aba64a8760703144e Mon Sep 17 00:00:00 2001

From: Josh Poimboeuf jpoimboe@redhat.com Date: Mon, 18 Sep 2017 21:43:36 -0500 Subject: x86/xen: Add unwind hint annotations

From: Josh Poimboeuf jpoimboe@redhat.com

commit abbe1cac6214d81d2f4e149aba64a8760703144e upstream.

Add unwind hint annotations to the xen head code so the ORC unwinder can read head_64.o.

hypercall_page needs empty annotations at 32-byte intervals to match the 'xen_hypercall_*' ELF functions at those locations.

Signed-off-by: Josh Poimboeuf jpoimboe@redhat.com Cc: Andy Lutomirski luto@kernel.org Cc: Boris Ostrovsky boris.ostrovsky@oracle.com Cc: Jiri Slaby jslaby@suse.cz Cc: Juergen Gross jgross@suse.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Link: http://lkml.kernel.org/r/70ed2eb516fe9266be766d953f93c2571bca88cc.1505764066... Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/xen/xen-head.S | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)

--- a/arch/x86/xen/xen-head.S +++ b/arch/x86/xen/xen-head.S @@ -10,6 +10,7 @@ #include <asm/boot.h> #include <asm/asm.h> #include <asm/page_types.h> +#include <asm/unwind_hints.h>

#include <xen/interface/elfnote.h> #include <xen/interface/features.h> @@ -20,6 +21,7 @@ #ifdef CONFIG_XEN_PV __INIT ENTRY(startup_xen) + UNWIND_HINT_EMPTY cld

/* Clear .bss */ @@ -41,7 +43,10 @@ END(startup_xen) .pushsection .text .balign PAGE_SIZE ENTRY(hypercall_page) - .skip PAGE_SIZE + .rept (PAGE_SIZE / 32) + UNWIND_HINT_EMPTY + .skip 32 + .endr

#define HYPERCALL(n) \ .equ xen_hypercall_##n, hypercall_page + __HYPERVISOR_##n * 32; \

Patches currently in stable-queue which might be from jpoimboe@redhat.com are

queue-4.14/x86-asm-don-t-use-the-confusing-.ifeq-directive.patch queue-4.14/x86-boot-relocate-definition-of-the-initial-state-of-cr0.patch queue-4.14/objtool-don-t-report-end-of-section-error-after-an-empty-unwind-hint.patch queue-4.14/x86-xen-fix-xen-head-elf-annotations.patch queue-4.14/x86-head-fix-head-elf-function-annotations.patch queue-4.14/objtool-print-top-level-commands-on-incorrect-usage.patch queue-4.14/x86-unwind-rename-unwinder-config-options-to-config_unwinder_.patch queue-4.14/x86-head-add-unwind-hint-annotations.patch queue-4.14/x86-head-remove-unused-bad_address-code.patch queue-4.14/x86-xen-add-unwind-hint-annotations.patch queue-4.14/x86-head-remove-confusing-comment.patch queue-4.14/x86-unwinder-make-config_unwinder_orc-y-the-default-in-the-64-bit-defconfig.patch queue-4.14/x86-unwind-make-config_unwinder_orc-y-the-default-in-kconfig-for-64-bit.patch queue-4.14/x86-mm-relocate-page-fault-error-codes-to-traps.h.patch queue-4.14/x86-boot-annotate-verify_cpu-as-a-callable-function.patch