This is a note to let you know that I've just added the patch titled
x86-64/realmode: Add instruction suffix
to the 4.15-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: x86-64-realmode-add-instruction-suffix.patch and it can be found in the queue-4.15 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 8554004a0231dedf44d4d62147fb3d6a6db489aa Mon Sep 17 00:00:00 2001
From: Jan Beulich JBeulich@suse.com Date: Mon, 19 Feb 2018 08:06:14 -0700 Subject: x86-64/realmode: Add instruction suffix
From: Jan Beulich JBeulich@suse.com
commit 8554004a0231dedf44d4d62147fb3d6a6db489aa upstream.
Omitting suffixes from instructions in AT&T mode is bad practice when operand size cannot be determined by the assembler from register operands, and is likely going to be warned about by upstream GAS in the future (mine does already). Add the single missing suffix here.
Signed-off-by: Jan Beulich jbeulich@suse.com Acked-by: Thomas Gleixner tglx@linutronix.de Cc: Andy Lutomirski luto@kernel.org Cc: Borislav Petkov bp@alien8.de Cc: Brian Gerst brgerst@gmail.com Cc: Denys Vlasenko dvlasenk@redhat.com Cc: H. Peter Anvin hpa@zytor.com Cc: Josh Poimboeuf jpoimboe@redhat.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Link: http://lkml.kernel.org/r/5A8AF5F602000078001A9230@prv-mh.provo.novell.com Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/x86/realmode/rm/trampoline_64.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/realmode/rm/trampoline_64.S +++ b/arch/x86/realmode/rm/trampoline_64.S @@ -102,7 +102,7 @@ ENTRY(startup_32) * don't we'll eventually crash trying to execute encrypted * instructions. */ - bt $TH_FLAGS_SME_ACTIVE_BIT, pa_tr_flags + btl $TH_FLAGS_SME_ACTIVE_BIT, pa_tr_flags jnc .Ldone movl $MSR_K8_SYSCFG, %ecx rdmsr
Patches currently in stable-queue which might be from JBeulich@suse.com are
queue-4.15/x86-ldt-avoid-warning-in-32-bit-builds-with-older-gcc.patch queue-4.15/x86-asm-improve-how-gen_-_suffixed_rmwcc-specify-clobbers.patch queue-4.15/x86-64-realmode-add-instruction-suffix.patch queue-4.15/x86-io-apic-avoid-warning-in-32-bit-builds.patch