summaryrefslogtreecommitdiffstats
path: root/arch/x86/entry
diff options
context:
space:
mode:
authorJan Beulich <JBeulich@suse.com>2017-02-03 01:58:03 -0700
committerIngo Molnar <mingo@kernel.org>2017-03-01 10:16:30 +0100
commitfdbd518adfaf2c10903250dffe70c61ed90b7dd7 (patch)
treefc0431d79f205d3b720eb477319eedd91958f52b /arch/x86/entry
parent2d6be4abf514fc26c83d239c7f31da1f95e4a31d (diff)
downloadop-kernel-dev-fdbd518adfaf2c10903250dffe70c61ed90b7dd7.zip
op-kernel-dev-fdbd518adfaf2c10903250dffe70c61ed90b7dd7.tar.gz
x86/entry/32: Relax a pvops stub clobber specification
The code at .Lrestore_nocheck does not make any assumptions on register values, so all registers can be clobbered on code paths leading there. Signed-off-by: Jan Beulich <jbeulich@suse.com> 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> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/5894542B02000078001366C5@prv-mh.provo.novell.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/entry')
-rw-r--r--arch/x86/entry/entry_32.S2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S
index 57f7ec3..5553475 100644
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -585,7 +585,7 @@ ENTRY(iret_exc )
* will soon execute iret and the tracer was already set to
* the irqstate after the IRET:
*/
- DISABLE_INTERRUPTS(CLBR_EAX)
+ DISABLE_INTERRUPTS(CLBR_ANY)
lss (%esp), %esp /* switch to espfix segment */
jmp .Lrestore_nocheck
#endif
OpenPOWER on IntegriCloud